CN109737695A - A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary - Google Patents
A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary Download PDFInfo
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- CN109737695A CN109737695A CN201811621594.2A CN201811621594A CN109737695A CN 109737695 A CN109737695 A CN 109737695A CN 201811621594 A CN201811621594 A CN 201811621594A CN 109737695 A CN109737695 A CN 109737695A
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- fluidized bed
- ultrasonic wave
- wave auxiliary
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Abstract
The invention discloses a kind of lignite fluidized bed drying systems of ultrasonic wave auxiliary, fluidized bed dryer including ultrasonic wave auxiliary, ultrasonic transducer is set in the air duct of two sides, supersonic generator is located on the outside of air duct, the air flow inlet in air duct is connected with blower, and air stream outlet is successively connected with heater and fluidized bed airflow entrance, and fluidized bed airflow outlet is connected with cyclone separator, coal powder entrance is connected with screw-type coal distributor, is provided with discharge on the downside of drier；Air velocity is 0.1~4.0m/s in the fluidized bed dryer of the ultrasonic wave auxiliary, and gas flow temperature is 40~80 DEG C, and supersonic transducer frequency is 20~60kHz.The lignite fluidized bed drying system of ultrasonic wave auxiliary of the invention effectively shortens drying time by ultrasonic wave direct-coupling in fluidized bed drying process, reduces drying temperature and energy consumption, improves device security；And the waste heat generated using the cold wind recycling ultrasonic transducer course of work, guarantee equipment safety operation, further decreases energy consumption.
Description
Technical field
The present invention relates to brown coal drying and upgrading fields, and in particular to a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary
System.
Background technique
Lignite rich reserves account for about the 13% of coal in China gross reserves, are one of important fuels of thermal power generation, but contain
The lower feature of water rate higher (40%-50%), calorific value is the bottleneck that it is efficiently utilized.Drying and upgrading is to improve lignite using effect
The effective means of rate.Current main lignite upgrading generation technology is to need to consume a large amount of gasification latent heat based on evaporation drying,
Energy consumption is higher.Fluid bed drying process is used, so that coal dust comes into full contact with dried medium, drying efficiency can be effectively improved, and
Equipment and technology is mature, and process is continuously controllable, and the degree of automation is higher, can be further by means such as built-in heat source, waste heat recycling
Reduce its energy consumption.
Moisture in lignite can be divided into Free water and combine water, when lignite is heated to 100 DEG C or more under normal pressure, greatly
Partial Free water can be evaporated；But to remove the combination water in lignite, then need 160 DEG C or more of high temperature to destroy water
Divide the effect key between lignite molecule.Ultrasonic wave is the mechanical wave that frequency is 20kHz~1GHz, is propagated in coal dust using it
When caused mechanism and cavitation effect can destroy the effect key between moisture and lignite, increase moisture diffusion channel, subtract
Small moisture diffusion resistance effectively shortens drying time to reduce drying temperature and energy consumption.Patent CN107166896A and
The food drying device that CN103109919A discloses two kinds of ultrasonic waves auxiliary reduces dry by ultrasonic wave in conjunction with hot wind
Dry energy consumption shortens drying time.By ultrasonic applications in higher moisture lignite upgrading, and ultrasonic wave is improved by fluidization
Utilization rate, form the lignite ultrasonic dry drying process based on fluidized bed, while recycling the ultrasonic transducer course of work
Waste heat, to realizing that the dry energy-saving and emission-reduction of low-order coal are of great significance.
Summary of the invention
In order to overcome the above technical problem, the purpose of the present invention is to provide a kind of lignite fluidized bed of ultrasonic wave auxiliary is dry
Drying system has the characteristics that reduction energy consumption for drying, shortens drying time and safety is higher.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary, the fluidized bed brown coal drying device 1 including ultrasonic wave auxiliary,
1 two sides of fluidized bed brown coal drying device of the ultrasonic wave auxiliary are provided with air duct 9, and ultrasonic transducer 15 is located at two sides air duct
In 9, supersonic generator 7 is set to 9 outside of air duct, is provided with air flow inlet 8 at the top of air duct 9, bottom is provided with air stream outlet
12, air flow inlet 8 is connected with blower 4, and air stream outlet 12 is successively connected with heater 3 and fluidized bed airflow entrance 18, stream
Change bed air stream outlet 13 to be connected with cyclone separator 5, fluidized bed airflow entrance 18 and fluidized bed airflow outlet 13 are located at
The bottom and top of the fluidized bed brown coal drying device 1 of ultrasonic wave auxiliary, the 1 top coal of fluidized bed brown coal drying device of ultrasonic wave auxiliary
Powder entrance is connect with screw-type coal distributor 2, and 1 lower part of fluidized bed brown coal drying device of ultrasonic wave auxiliary is provided with discharge 14, institute
5 bottom of cyclone separator stated is provided with the coal collector 6 for collecting coal dust.
The two sides air duct 9 is welded on the fluidized bed brown coal drying device 1 of ultrasonic wave auxiliary, and baffle plate 10 is welded in wind
In road 9, area and 9 area of section ratio of air duct are 0.8, and the end cap 11 in air duct 9 can be opened, and sealing device is arranged in end cap 11.
It is provided with ultrasonic transducer 15 on the outside of the fluidized bed brown coal drying device 1 of the ultrasonic wave auxiliary, is pasted on super
1 outer wall of fluidized bed brown coal drying device of sound wave auxiliary, and be arranged symmetrically in two sides air duct 9, the frequency of ultrasonic transducer 15
For 20~60kHz.
9 outside weldings of two sides air duct have supersonic generator 7, are connected by conducting wire 16 with ultrasonic transducer 15
It connects, and the frequency and power of adjustable display ultrasonic transducer.
1 bottom of fluidized bed brown coal drying device of the ultrasonic wave auxiliary is provided with air distribution plate 17, is provided on air distribution plate
The aperture of distribution.
Gas flow temperature in the fluidized bed brown coal drying device 1 of the ultrasonic wave auxiliary can be used 40~80 DEG C, gas velocity
Degree is 0.1~4.0m/s.
The air stream outlet 12 is successively connected with heater 3 and fluidized bed airflow entrance 18.
The invention has the benefit that
The present invention caused mechanism and cavitation effect when being propagated in coal dust using ultrasonic wave, destroy moisture and lignite
Between effect key, increase moisture diffusion channel, reduce moisture diffusion resistance, to effectively shorten drying time, reduce drying
Temperature and energy consumption improve device security.
Pulverized coal particle is suspended among movement air flow by the present invention, reduces reflection when ultrasonic wave is propagated in coal dust layer
Rate, to improve the effective rate of utilization of ultrasonic wave, reduce drying process energy consumption.
Ultrasonic transducer is arranged in air duct the present invention, while baffle plate guidance cold wind flowing is arranged, and utilizes cold wind
The waste heat generated in the recycling ultrasonic transducer course of work, guarantees equipment safety operation, further decreases energy consumption.
Detailed description of the invention
Fig. 1 is device connection diagram of the invention.
Fig. 2 is the ultrasonic transducer and air duct layout drawing for the fluidized bed dryer that ultrasonic wave assists in Fig. 1.
Fig. 3 is the top view that the fluidized bed dryer that ultrasonic wave assists in Fig. 1 is connect with blower and heater.
Fig. 4 is the air duct axonometric drawing that the fluidized bed dryer that ultrasonic wave assists in Fig. 1 is connect with blower and heater.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary, in conjunction with shown in Fig. 1 to Fig. 4, including ultrasonic wave auxiliary
Fluidized bed brown coal drying device 1, screw-type coal distributor 2, heater 3, blower 4, cyclone separator 5, coal collector 6, supersonic generator
7, air duct 9 and ultrasonic transducer 15.Air duct air flow inlet 8 is connected with blower 4, air stream outlet 12 successively with heater 3 and
Fluidized bed airflow entrance 18 is connected, and fluidized bed airflow outlet 13 is connected with cyclone separator 5, and coal powder entrance and spiral are to coal
Machine 2 connects, and fluidized-bed bottom is provided with air distribution plate 17, the aperture being respectively distributed, fluidized bed dryer lower part are provided on air distribution plate
It is provided with discharge 14, coal collector 6 is for collecting coal dust.
The two sides air duct 9 is welded on fluidized bed ontology 1 in conjunction with shown in Fig. 1 to Fig. 3, and baffle plate 10 is welded in wind
In road 9, area and duct cross-section area ratio are 0.8, and the end cap 11 in air duct 9 can be opened, and sealing device is arranged in end cap 11.
The ultrasonic transducer 15 as shown in Fig. 2, being pasted on fluidized bed outer wall, and is arranged symmetrically in two sides air duct 9
In, the frequency of ultrasonic transducer is 20~60kHz.
The supersonic generator 7 is welded in outside two sides air duct 9, is connected by conducting wire 16 with ultrasonic transducer 15
It connects driving ultrasonic transducer 15 to work, and the frequency and power of adjustable display ultrasonic transducer.
Gas flow temperature in the fluidized bed dryer 1 of the described ultrasonic wave auxiliary is 40~80 DEG C, air velocity is 0.1~
4.0m/s。
Working principle of the present invention:
When system works, screw-type coal distributor 2 is added in coal dust, is first fed into the fluidized bed dryer 1 of ultrasonic wave auxiliary, by
4 delivery air of blower flows into two sides air duct 9, flows through ultrasonic transducer 15, after the excess heat for carrying ultrasonic transducer 15, stream
Exhaust passage 9 flows into heater 3 and is flowed into fluidized bed 1 again after heating, the fluid coal after air distribution plate 17 becomes uniform air flow
Then powder removes the moisture in coal dust under the collective effect of ultrasonic wave and hot wind that ultrasonic transducer 15 issues, removing
Moisture is discharged under the drive of air-flow by air stream outlet 13, after a small amount of coal dust that 5 separation bubble of cyclone separator carries out,
It is discharged into atmosphere, the coal dust after drying is overflowed from fluidized bed discharge 14, and coal collector 6 is finally flowed into together with isolated coal dust
In.
Claims (7)
1. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary, which is characterized in that the fluidized bed including ultrasonic wave auxiliary is brown
Fluidized bed brown coal drying device (1) two sides of coal dryer (1), the ultrasonic wave auxiliary are provided with air duct (9), ultrasonic wave transducer
Device (15) is located in two sides air duct (9), and supersonic generator (7) is set on the outside of air duct (9), is provided with gas at the top of air duct (9)
Inflow entrance (8), bottom are provided with air stream outlet (12), and air flow inlet (8) is connected with blower (4), and air stream outlet (12) is successively
It is connected with heater (3) and fluidized bed airflow entrance (18), fluidized bed airflow outlet (13) is connected with cyclone separator (5)
It connects, fluidized bed airflow entrance (18) and fluidized bed airflow outlet (13) are located at the fluidized bed brown coal drying device that ultrasonic wave assists
(1) bottom and top, fluidized bed brown coal drying device (1) the top coal powder entrance of ultrasonic wave auxiliary and screw-type coal distributor (2) are even
It connects, fluidized bed brown coal drying device (1) lower part of ultrasonic wave auxiliary is provided with discharge (14), the cyclone separator (5)
Bottom is provided with the coal collector (6) for collecting coal dust.
2. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary according to claim 1, which is characterized in that described
Two sides air duct (9) is welded on the fluidized bed brown coal drying device (1) of ultrasonic wave auxiliary, and baffle plate (10) is welded in air duct (9),
Its area and air duct (9) area of section ratio are 0.8, and the end cap (11) of air duct (9) can be opened, and end cap (11) setting sealing dress
It sets.
3. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary according to claim 1, which is characterized in that described
Ultrasonic transducer (15) are provided on the outside of the fluidized bed brown coal drying device (1) of ultrasonic wave auxiliary, are pasted on ultrasonic wave auxiliary
Fluidized bed brown coal drying device (1) outer wall, and be arranged symmetrically in two sides air duct (9), the frequency of ultrasonic transducer (15) is 20
~60kHz.
4. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary according to claim 3, which is characterized in that described
Two sides air duct (9) outside weldings have supersonic generator (7), are connected by conducting wire (16) with ultrasonic transducer (15), and
The frequency and power of adjustable display ultrasonic transducer.
5. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary according to claim 1, which is characterized in that described
Ultrasonic wave auxiliary fluidized bed brown coal drying device (1) bottom be provided with air distribution plate (17), be provided on air distribution plate be respectively distributed it is small
Hole.
6. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary according to claim 1, which is characterized in that described
Gas flow temperature in the fluidized bed brown coal drying device (1) of ultrasonic wave auxiliary can be used 40~80 DEG C, and air velocity is 0.1~
4.0m/s。
7. a kind of lignite fluidized bed drying system of ultrasonic wave auxiliary according to claim 1, which is characterized in that described
Air stream outlet (12) is successively connected with heater (3) and fluidized bed airflow entrance (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621594.2A CN109737695A (en) | 2018-12-28 | 2018-12-28 | A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621594.2A CN109737695A (en) | 2018-12-28 | 2018-12-28 | A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary |
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| CN109737695A true CN109737695A (en) | 2019-05-10 |
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| CN201811621594.2A Pending CN109737695A (en) | 2018-12-28 | 2018-12-28 | A kind of lignite fluidized bed drying system of ultrasonic wave auxiliary |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131966A (en) * | 2019-05-20 | 2019-08-16 | 天津科技大学 | Intermittent combustion internal heating type fluidized bed drying device |
| CN113385517A (en) * | 2021-05-08 | 2021-09-14 | 江苏杰林环保科技有限公司 | Harmless treatment method for chemical waste salt |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2150535A1 (en) * | 1994-11-21 | 1996-05-22 | Harumasa Maruyama | Fluidized bed equipment for drying or cooling of powder and a process for drying or cooling of powder by use thereof |
| CN103109919A (en) * | 2013-01-31 | 2013-05-22 | 河南科技大学 | Ultrasonic and hot air combined carrot drying method and ultrasonic and hot air combined drying device |
| CN107166896A (en) * | 2017-05-17 | 2017-09-15 | 东南大学 | A kind of ultrasonic assistant drying system |
| CN206959457U (en) * | 2017-05-24 | 2018-02-02 | 济宁牧易生物科技有限公司 | A kind of fluidized bed drying system |
-
2018
- 2018-12-28 CN CN201811621594.2A patent/CN109737695A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2150535A1 (en) * | 1994-11-21 | 1996-05-22 | Harumasa Maruyama | Fluidized bed equipment for drying or cooling of powder and a process for drying or cooling of powder by use thereof |
| CN103109919A (en) * | 2013-01-31 | 2013-05-22 | 河南科技大学 | Ultrasonic and hot air combined carrot drying method and ultrasonic and hot air combined drying device |
| CN107166896A (en) * | 2017-05-17 | 2017-09-15 | 东南大学 | A kind of ultrasonic assistant drying system |
| CN206959457U (en) * | 2017-05-24 | 2018-02-02 | 济宁牧易生物科技有限公司 | A kind of fluidized bed drying system |
Non-Patent Citations (1)
| Title |
|---|
| J.V. GARCÍA-PÉREZ ET AL: "Ultrasonic drying of foodstuff in a fluidized bed: Parametric study.", 《ULTRASONICS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131966A (en) * | 2019-05-20 | 2019-08-16 | 天津科技大学 | Intermittent combustion internal heating type fluidized bed drying device |
| CN113385517A (en) * | 2021-05-08 | 2021-09-14 | 江苏杰林环保科技有限公司 | Harmless treatment method for chemical waste salt |
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Application publication date: 20190510 |
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