CN111097693A - Continuous drying and sorting integrated equipment and method for wet fine coal - Google Patents
Continuous drying and sorting integrated equipment and method for wet fine coal Download PDFInfo
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- CN111097693A CN111097693A CN201911381581.7A CN201911381581A CN111097693A CN 111097693 A CN111097693 A CN 111097693A CN 201911381581 A CN201911381581 A CN 201911381581A CN 111097693 A CN111097693 A CN 111097693A
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- bed body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/06—Feeding or discharging arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a continuous drying and sorting integrated device and method for wet fine coal, which are suitable for drying, sorting and upgrading wet fine coal. The device mainly comprises a blast device and a drying and sorting integrated device. The blower device comprises a Roots blower, an air bag, a pressure gauge, a butterfly valve, a connecting air pipe, a flow meter and a heater which are connected in sequence; the drying and sorting integrated device comprises a bed body, a sealing cover, an exhaust port, a vibration exciter, a material inlet/outlet, an auxiliary material outlet wheel, an air chamber, an inclined gas distribution plate and a vibration isolating spring. The continuous drying and sorting combined operation is carried out on the wet fine-grained coal, so that the integration of the drying and sorting operation of the wet fine-grained coal is realized, the autonomous discharging of a final product is realized, the related procedures and equipment are simplified, the operation flow and the production cost are reduced to the maximum extent, and the operation intensity of personnel is reduced. The device is simple and convenient to operate, and provides a new way for drying and sorting the wet fine coal.
Description
Technical Field
The invention relates to the technical field of cross drying and dry separation of wet fine coal, in particular to continuous drying and separation integrated equipment and method for the wet fine coal, and is particularly suitable for drying and dry separation of the wet fine coal in northwest regions.
Background
Coal is a main energy resource in China and occupies the main position of the whole consumption device. However, the coal processing and utilizing process taking combustion as the main factor is easy to cause resource waste and environmental pollution, so that the coal needs to be sorted and upgraded. However, with the continuous popularization and application of the fully mechanized mining technology, more fine particles (<6mm) coal are formed in the mining process, and the quantity of the coal reaches 70% in some regions, which is particularly important for the separation and quality improvement operation of the fine particles. Meanwhile, the fine coal has a high moisture content and a severe argillization phenomenon, which seriously affects the separation operation of the fine coal, so that the fine coal needs to be subjected to pre-selection drying to reduce the moisture content. For a long time, the drying and sorting processes of the fine coal are two mutually independent processes, a series of processes are required from the drying to the sorting of the fine coal, the number of related devices is large, the labor intensity of operators is increased, and the cost control of the processes is also influenced. In view of the above situation, an integrated device for drying and sorting wet fine coal is developed to form a combined process for drying and sorting wet fine coal, so that the operation steps and equipment can be further simplified, and the operation cost is reduced while the product quality is ensured.
Considering that coal in China is mainly distributed in northwest areas with water shortage, and meanwhile, in order to avoid secondary drying after fine coal separation, a dry separation technology is needed for fine coal separation, and gas-solid fluidized separation is an effective dry separation technology which is recognized at present. The drying and sorting integrated device for the wet fine coal based on the vibration fluidization is developed by combining a mature fluidization drying technology, and can be used for combined operation of pre-drying and subsequent sorting of the wet fine coal.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the defects in the prior art and provides the wet fine coal continuous drying and sorting integrated device and the method which are simple in device and convenient to operate and can be used for combined operation of pre-drying and subsequent sorting of wet fine coal.
The technical scheme is as follows: the invention discloses a continuous drying and sorting integrated device for wet fine coal, which comprises a blower device consisting of a Roots blower, an air bag, a pressure gauge, a butterfly valve, a rotor flow meter and a heater, wherein the Roots blower, the air bag, the pressure gauge, the butterfly valve, the rotor flow meter and the heater are sequentially connected through air pipes, and the continuous drying and sorting integrated device is characterized in that: the drying and sorting integrated device is arranged above the ventilation pipe of the air blowing device, the drying and sorting integrated device comprises a rectangular fluidized bed body, a sealing cover arranged on the upper part of the rectangular fluidized bed body, an air outlet is arranged on the sealing cover, a vibration exciter is arranged at the middle part of the rectangular fluidized bed body, a feed inlet is arranged on one side of the rectangular fluidized bed body, a gangue discharge outlet and a clean coal discharge outlet are arranged on the other side of the rectangular fluidized bed body, an inclined gas distribution plate is arranged in the rectangular fluidized bed body from a feed inlet to the discharge outlet, the lower part of the inclined gas distribution plate is an air chamber, a plurality of inlets communicated with the ventilation pipe of the air blowing device are arranged at the bottom of the air chamber, hot air is sent into the air chamber through a heater, hot air upwards penetrates through the inclined gas distribution plate, moist, the bottom of the air chamber is provided with a plurality of ventilation pipes communicated with the air blowing device, and four corners at the bottom of the rectangular fluidized bed body are provided with vibration isolation springs.
The L multiplied by W multiplied by H size of the rectangular fluidized bed body is 2400mm multiplied by 560mm multiplied by 600 mm.
The inclined gas distribution plate is uniformly distributed with round holes with the aperture ratio of 10-20 percent, and the inclination angle of the inclined gas distribution plate is 15 degrees.
The heating temperature of the heater is 80-180 ℃.
The vibration frequency of the rectangular fluidized bed body is 25HZ, and the vibration amplitude is 2 mm.
Discharge wheels are arranged at the gangue discharge port and the clean coal discharge port.
The continuous drying and sorting integrated drying and sorting method for the wet fine coal by using the equipment comprises the following steps:
step one, starting a vibration exciter in the middle of a rectangular fluidized bed body to enable the rectangular fluidized bed body to operate according to the frequency of 25HZ and the amplitude of 2mm, and simultaneously starting a blast device;
continuously feeding 1-6mm of wet fine coal onto an inclined gas distribution plate in the bed body from a feeding hole, wherein under the action of self gravity and bed body vibration, the wet fine coal moves towards a discharging end along the inclined gas distribution plate while air flow sequentially passes through a Roots blower and an air bag, is heated by a heater and then enters an air chamber in the bed body, and then is distributed through the inclined gas distribution plate to form uniformly distributed ascending hot air flow, so that the external moisture of the wet fine coal on the inclined gas distribution plate is evaporated under the action of the hot air flow, and the wet fine coal is dried;
thirdly, the fine coal dried under the synergistic action of the rising hot air flow and the vibration of the bed body begins to be in a fluidized state to form a gas-solid fluidized bed; and then, the fine coal presents a layering phenomenon in a gas-solid fluidized bed layer according to the density difference, namely, the coal particles with lighter density float upwards, the particles with heavier density descend, the floating coal particles are discharged from a clean coal discharge port and enter a clean coal bunker, and the sunken waste rock is discharged from a waste rock discharge port at the bottom and enters a waste rock bunker, so that the upgraded clean coal and the sorted waste rock are finished.
Has the advantages that: by adopting the technical scheme, the invention realizes the integration of drying and sorting operation of the wet fine coal, simplifies related procedures and equipment, reduces the operation intensity of personnel and the procedure cost, and has the following advantages compared with the prior art:
1) the device has reasonable design, simple structure and convenient operation, and provides a new way for drying and sorting the wet fine coal.
2) Traditional scraper blade discharge device has been abandoned to this device, adopts tilting gas distribution board to realize that the material is at the autonomic row material process under the action of gravity, has simplified the inner structure, has avoided traditional scraper blade to the wearing and tearing of bed internal member, has reduced the interference to fluidized bed layer.
3) The combination of the vibration energy and the ascending hot air flow improves the looseness of the wet fine coal on one hand, is beneficial to accelerating the drying efficiency of the wet fine coal, weakens the dead zone and the mass flow phenomenon in the fluidized bed layer formed by the dried fine coal on the other hand, is beneficial to the stable fluidization of the fine coal, and strengthens the subsequent sorting process of the fine coal.
4) It is suitable for the combined operation of drying and sorting wet fine coal, and can also be applied to other fields of energy, chemical industry, materials and the like.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
Fig. 2 is a front view of the main body apparatus of fig. 1.
Fig. 3 is a left side view of the structure of the main body apparatus of fig. 1.
Fig. 4 is a top view of the structure of the main body apparatus of fig. 1.
In the figure: 1-roots blower; 2-wind bag; 3-a pressure gauge; 4-a butterfly valve; 5-a rotameter; 6-a heater; 7-inclined gas distribution plate; 8-a feed inlet; 9-an exhaust port; 10-a rectangular fluidized bed body; 11-a discharge wheel; 12-clean coal discharge outlet; 13-a gangue discharge port; 14-vibration isolation spring; 15-air chamber; 16-a vibration exciter; 17-sealing the cover.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
as shown in fig. 1, the continuous drying and sorting integrated equipment for wet fine coal of the present invention mainly comprises an air blowing device and a drying and sorting integrated device, wherein the air blowing device is composed of a roots blower 1, an air bag 2, a pressure gauge 3, a butterfly valve 4, a rotor flow meter 5 and a heater 6 which are sequentially connected by air pipes, the drying and sorting integrated device is arranged above the air pipe of the air blowing device, the drying and sorting integrated device comprises a rectangular fluidized bed body 10 and a sealing cover 17 arranged on the upper part of the rectangular fluidized bed body 10, an exhaust port 9 is arranged on the sealing cover 17, a vibration exciter 16 is arranged in the middle of the rectangular fluidized bed body 10, and the dimension lxwxh of the rectangular fluidized bed body 10 is 2400mm × 560mm × 600 mm; the vibration frequency of the rectangular fluidized bed body 10 is 25HZ, and the vibration amplitude is 2 mm. One side of the rectangular fluidized bed body 10 is provided with a feed inlet 8, the other side is provided with a gangue discharge port 13 and a clean coal discharge port 12, the gangue discharge port 13 and the clean coal discharge port 12 are respectively provided with a discharge wheel 11, the discharge wheels 11 are respectively fixed at the clean coal and the gangue discharge port of the bed body through bolts, and the sealing cover 17 is connected with the rectangular fluidized bed body 10 through bolts. A tilting gas distribution plate 7 is arranged from a feeding port to a discharging port in the rectangular fluidized bed body 10, round holes with the aperture ratio of 10% -20% are uniformly distributed on the tilting gas distribution plate 7, and the inclination angle of the tilting gas distribution plate 7 is 15 degrees. The lower part of the inclined gas distribution plate 7 is provided with an air chamber 15, the bottom of the air chamber 15 is provided with a plurality of inlets communicated with a ventilation pipe of a blowing device, hot air is sent into the air chamber 15 through a heater 6, the heating temperature of the heater 6 is 80-180 ℃, and the temperature of the fluidized gas can be controlled in a region of 80-180 ℃. The hot air upwards penetrates through the inclined gas distribution plate 7 to dry the wet fine coal, air holes in the inclined gas distribution plate 7 are kept smooth, the lower portion of the inclined gas distribution plate 7 is an air chamber 15, the bottom of the air chamber 15 is provided with a plurality of ventilation pipes communicated with a blowing device, and four corners of the bottom of the rectangular fluidized bed body 10 are provided with vibration isolating springs 14.
The invention relates to a continuous drying and sorting integrated drying and sorting method for wet fine coal, which comprises the following steps:
step one, starting a vibration exciter 16 in the middle of a rectangular fluidized bed body 10 to enable the rectangular fluidized bed body 10 to operate according to the frequency of 25HZ and the amplitude of 2mm, and simultaneously starting a blast device;
continuously feeding 1-6mm wet fine coal from a feed inlet 8 onto an inclined gas distribution plate 7 in the bed body, wherein under the action of self gravity and bed body vibration, the wet fine coal moves towards a discharge end along the inclined gas distribution plate 7 and simultaneously air flows sequentially through a Roots blower 1 and an air bag 2, the wet fine coal is heated by a heater 6 and then enters an air chamber in the bed body, and then the air is distributed by the inclined gas distribution plate 7 to form uniformly distributed ascending hot air flow, so that the moisture outside the wet fine coal on the inclined gas distribution plate 7 is evaporated under the action of the hot air flow to be dried;
thirdly, the fine coal dried under the synergistic action of the rising hot air flow and the vibration of the bed body begins to be in a fluidized state to form a gas-solid fluidized bed; and then, the fine coal presents a layering phenomenon in a gas-solid fluidized bed layer according to the density difference, namely, the coal particles with lighter density float upwards, the particles with heavier density descend, the floating coal particles are discharged from a clean coal discharge port 12 and enter a clean coal bunker, and the sunken waste rock is discharged from a waste rock discharge port 13 at the bottom and enters a waste rock bunker, so that the upgraded clean coal and the sorted waste rock are finished.
Claims (7)
1. The utility model provides a wet fine coal continuity drying and sorting integration equipment, includes the blower device who constitutes by roots blower (1), bellows (2), manometer (3), butterfly valve (4), rotor flow meter (5) and heater (6) that the tuber pipe links to each other in proper order, its characterized in that: the drying and sorting integrated device is arranged above a ventilation pipe of the air blowing device, the drying and sorting integrated device comprises a rectangular fluidized bed body (10), a sealing cover (17) arranged on the upper portion of the rectangular fluidized bed body (10), an exhaust port (9) is arranged on the sealing cover (17), a vibration exciter (16) is arranged in the middle of the rectangular fluidized bed body (10), a feed inlet (8) is arranged on one side of the rectangular fluidized bed body (10), a gangue discharge port (13) and a clean coal discharge port (12) are arranged on the other side of the rectangular fluidized bed body (10), an inclined gas distribution plate (7) is arranged from the feed inlet to the discharge port in the rectangular fluidized bed body (10), the lower portion of the inclined gas distribution plate (7) is an air chamber (15), a plurality of inlets communicated with the ventilation pipe of the air blowing device are arranged at the bottom of the air, hot air upwards penetrates through the inclined gas distribution plate (7) to dry wet fine coal, air holes in the inclined gas distribution plate (7) are kept smooth, the lower portion of the inclined gas distribution plate (7) is an air chamber (15), the bottom of the air chamber (15) is provided with a plurality of ventilation pipes communicated with a blowing device, and four corners of the bottom of the rectangular fluidized bed body (10) are provided with vibration isolating springs (14).
2. The integrated continuous drying and sorting equipment for the wet fine coal as claimed in claim 1, wherein: the L multiplied by W multiplied by H size of the rectangular fluidized bed body (10) is 2400mm multiplied by 560mm multiplied by 600 mm.
3. The integrated continuous drying and sorting equipment for the wet fine coal as claimed in claim 1, wherein: round holes with the aperture ratio of 10-20 percent are uniformly distributed on the inclined gas distribution plate (7), and the inclination angle of the inclined gas distribution plate (7) is 15 degrees.
4. The integrated continuous drying and sorting equipment for the wet fine coal as claimed in claim 1, wherein: the heating temperature of the heater (6) is 80-180 ℃.
5. The integrated continuous drying and sorting equipment for the wet fine coal as claimed in claim 1, wherein: the vibration frequency of the rectangular fluidized bed body (10) is 25HZ, and the vibration amplitude is 2 mm.
6. The integrated continuous drying and sorting equipment for the wet fine coal as claimed in claim 1, wherein: and discharge wheels (11) are arranged at the gangue discharge port (13) and the clean coal discharge port (12).
7. A drying and sorting integrated method for continuously drying and sorting wet fine coal by using the apparatus of claim 1, comprising the steps of:
step one, starting a vibration exciter (16) in the middle of a rectangular fluidized bed body (10), enabling the rectangular fluidized bed body (10) to operate according to the frequency of 25HZ and the amplitude of 2mm, and simultaneously starting a blast device;
continuously feeding 1-6mm wet fine coal from a feed inlet (8) onto an inclined gas distribution plate (7) in the bed body, wherein under the action of self gravity and bed body vibration, the wet fine coal moves towards a discharge end along the inclined gas distribution plate (7) while air flow sequentially passes through a Roots blower (1) and an air bag (2), is heated by a heater (6) and then enters an air chamber in the bed body, and then is distributed by the inclined gas distribution plate (7) to form uniformly distributed hot air flow to rise, so that the external moisture of the wet fine coal on the inclined gas distribution plate (7) is evaporated under the action of the hot air flow to be dried;
thirdly, the fine coal dried under the synergistic action of the rising hot air flow and the vibration of the bed body begins to be in a fluidized state to form a gas-solid fluidized bed; and then, the fine coal presents a layering phenomenon in a gas-solid fluidized bed layer according to the density difference, namely, the coal particles with lighter density float upwards, the particles with heavier density descend, the floating coal particles are discharged from a clean coal discharge port (12) and enter a clean coal bunker, and the sunken waste rock is discharged from a waste rock discharge port (13) at the bottom and enters a waste rock bunker, so that the cleaned coal with improved quality and the separated waste rock are finished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911381581.7A CN111097693A (en) | 2019-12-27 | 2019-12-27 | Continuous drying and sorting integrated equipment and method for wet fine coal |
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| CN201911381581.7A CN111097693A (en) | 2019-12-27 | 2019-12-27 | Continuous drying and sorting integrated equipment and method for wet fine coal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570282A (en) * | 2020-05-09 | 2020-08-25 | 刘蕴仪 | Horizontal living beings discarded object selection by winnowing drying all-in-one to one side |
| CN112090747A (en) * | 2020-11-09 | 2020-12-18 | 天津美腾科技股份有限公司 | Material screening device and material screening method |
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| CN112090747A (en) * | 2020-11-09 | 2020-12-18 | 天津美腾科技股份有限公司 | Material screening device and material screening method |
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Application publication date: 20200505 |