CN106403502B - A kind of drying system according to inlet temperature intelligent control motor revolving speed - Google Patents
A kind of drying system according to inlet temperature intelligent control motor revolving speed Download PDFInfo
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- CN106403502B CN106403502B CN201610860036.6A CN201610860036A CN106403502B CN 106403502 B CN106403502 B CN 106403502B CN 201610860036 A CN201610860036 A CN 201610860036A CN 106403502 B CN106403502 B CN 106403502B
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- revolving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
- F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
- F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/02—Applications of driving mechanisms, not covered by another subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of hot-air drying system, drying device includes cabinet, temperature sensor, flow sensor and conveyer belt, the drying device includes cabinet, temperature sensor, flow sensor and conveyer belt, the conveyer belt passes through cabinet, temperature sensor includes inlet temperature sensor, measurement enters the hot air temperature of drying device, and admission line temperature sensor and central controller carry out data connection；Central controller controls the coal-supplying amount of unit time come the revolving speed of adjust automatically driving motor according to the hot air temperature into drying device of measurement so as to adjust the transmission speed of belt pulley.The present invention for the first time connects the intake air temperature of drying device and motor speed, it is established that the intelligent control relationship of the two, while it is intelligent can be carried out coal drying using the sun, it is energy saving, it is environmentally protective.
Description
Technical field
The invention belongs to the device and method that dry field more particularly to a kind of pair of coal are dried.
Background technique
The features such as coal is used as one of main disposable energy of country, however moisture is high, calorific value is low, easy spontaneous combustion, coal
Large-scale develop and utilize by larger limitation.Either have in mind from the overall situation of country, or from Business Economic Benefit
Angle sees that coal drying and dewatering, the technical research of raising unit mass heating value of coal and popularization are very important.Steam pipe
The high wet coal of moisture content after drying, is sent to and is matched in steam tube rotary drier by rotary coal predry drying system
Have in the pulverized coal preparation system of medium-speed pulverizer and grind, then burns in boiler.Since the most of moisture in coal is evaporated out
Come, the low heat valve of unit mass coal is improved, while also reducing the exhaust gas volumn and flue gas loss of boiler.By following
Steam in coal is carried out by ring carrier gas, and cooling tower and heat exchanger recycling heat and moisture, unit reality water consumption drop significantly
It is low.Since coal water content is larger, the drying capacity of pulverized coal preparation system is required high；And volatile matter is higher, and coal dust is easily sent out
Be born from fire it is fried.
The research of coal dehydration upgrading technology is started to become domestic and international hot spot, this has done numerous studies, coal in foreign countries
Charcoal dehydration upgrading technology is more, and can substantially be divided into three classes method: mechanical dehydration method, dehydration by evaporation method and non-evaporating dehydrolysis method.
Mechanical dehydration method is widely used in coal preparation plant, but the still difficult adaptation of its processing capacity and dehydration efficiency requires.Dehydration by evaporation method, benefit
With the heating coal that the media such as hot oil, hot-air, superheated steam are direct or indirect, remove moisture in coal in a gaseous form.
The a large amount of energy of dehydration by evaporation process requirement carrys out evaporation water, and energy consumption is high.Non-evaporating dehydrolysis method be broadly divided into hydro-thermal process method and
Mechanical hot pressing evaporation removes the moisture in coal in liquid form.Non-evaporating dehydrolysis method, complex process, higher cost, mesh
It is preceding not put into industrial application.In addition, non-evaporating dehydrolysis method also brings the problems such as waste water, exhaust-gas treatment.
Current drying equipment, intelligence degree is not high, and sometimes because of the quantity of hot air or coal amount of supply
It is excessive perhaps very few cause drying effect bad or cause hot-air it is excessive caused by waste, therefore need to develop
A kind of energy consumption is few, discharges small, at low cost, green coal dehydration technique that is safe and reliable and being able to carry out intelligent control.
Summary of the invention
In view of the shortcomings of the current prior art, the object of the present invention is to provide a kind of solar energy coals of new intelligent control
Drying device solves disadvantages mentioned above.
To achieve the goals above, technical scheme is as follows: a kind of hot-air drying system, the drying system
Including feeder, crushing device and drying device, the feeder includes coal breakage nozzle, idler wheel and driving motor, belt, is driven
Dynamic motor driven idler wheel rotation, idler wheel drive belt rotation, and the coal enters from coal breakage nozzle, by being conveyed into for belt
Broken coal is transferred to drying device by crushing device, crushing device；The driving motor and central controller data connection；
The drying device includes cabinet, temperature sensor, flow sensor and conveyer belt, and the conveyer belt passes through case
Body, temperature sensor include inlet temperature sensor, and measurement enters the hot air temperature of drying device, admission line temperature sensing
Device and central controller carry out data connection；
Central controller according to the hot air temperature into drying device of measurement come the revolving speed of adjust automatically driving motor,
So as to adjust the transmission speed of belt pulley, the coal-supplying amount of unit time is controlled.
Preferably, if the air themperature into drying device of central controller measurement declines, central controller
The automatic revolving speed for reducing driving motor；If the air themperature into drying device of central controller measurement rises, center
Controller increases the revolving speed of driving motor automatically.
Preferably, central controller is adjusted according to the following formula, it may be assumed that the heat that the unit time enters drying device is empty
The matter of the flow of gas × (into temperature-fiducial temperature of the hot-air of drying device 17)/unit time feeder transmission coal
Amount=constant.
Preferably, constant is preset in the central controller.
Preferably, fiducial temperature is 30-40 degrees Celsius.
Preferably, driving motor is blown when the temperature of measurement is the first temperature with the first revolving speed；When measurement
When temperature has risen to the second temperature bigger than the first temperature, driving motor is turned with the second revolving speed for being higher than the first revolving speed
It is dynamic；When the temperature of measurement has risen to the third temperature bigger than second temperature, driving motor is with the third higher than the second revolving speed
Revolving speed is rotated；When the temperature of measurement has risen to four temperature bigger than third temperature, driving motor is to be higher than third
4th revolving speed of revolving speed is rotated；When the temperature of measurement has risen to five temperature bigger than the 4th temperature, driving motor
It is rotated with being higher than the 5th revolving speed of the 4th revolving speed.
Preferably, the 5th temperature is greater than the 4th 3-5 degrees Celsius of temperature, the 4th temperature is greater than 3-5 degrees Celsius of third temperature,
Third temperature is greater than 3-5 degrees Celsius of second temperature, and second temperature is greater than 3-5 degrees Celsius of the first temperature.
Preferably, the 5th temperature is greater than the 4th 4.5-5 degrees Celsius of temperature, the 4th temperature is greater than third temperature 4-4.5 and takes the photograph
Family name's degree, third temperature are greater than 3.5-4 degrees Celsius of second temperature, and second temperature is greater than the 5th 3-3.5 degrees Celsius of temperature.
Preferably, the 5th revolving speed is 1.1-1.3 times of the 4th revolving speed, the 4th revolving speed is 1.1-1.3 times of third revolving speed,
Third revolving speed is 1.1-1.3 times of the second revolving speed, and the second revolving speed is 1.1-1.3 times of the first revolving speed.
Preferably, the drying device includes cabinet, conveyer belt, the conveyer belt passes through cabinet, the hot-air from
The lower part of drying device enters drying device, then passes through conveyer belt to dry the coal conveyed on conveyer belt, finally from drying
The outlet of device is discharged, to complete the drying to coal；
General pipeline is arranged in the air intake pipe of the drying device, then connects many isocons by general pipeline, by dividing
Flow tube delivers air to conveyer belt lower part, and multiple isocons are arranged along conveyer belt transporting direction, are arranged on each isocon
One blower, in drying device, along conveyer belt direction of transfer, the power of the blower is smaller and smaller, the function of the blower
The amplitude that rate becomes smaller gradually decreases.
Preferably, assume that entering the unit time Coal Quality of conveyer belt is Z, when quality moisture content is H, into
The admission line hot air temperature for entering drying device is D1, air mass flow L, and the outlet hot air temperature for leaving drying device is
D2 indicates the drying effect met certain condition when the transmission speed of conveyer belt is S；Above-mentioned unit time coal matter
Measure the transmission speed S of Z, quality moisture content H, admission line air themperature D1, air mass flow L, outlet air temperature D2, conveyer belt
Referred to as standard quality, standard aqueous rate, standard admission line temperature, standard exit temperature, normal air flow, standard speed,
That is normal data；The normal data storage is in the central controller；
When unit time Coal Quality is z, quality moisture content is h, into the air of drying equipment flow l,
Admission line air themperature d1, outlet air temperature d2 and conveyer belt transmission speed s meet following operational mode:
Conveyer belt transmission speed s keeps standard speed S constant, and the flow 1 of air changes as follows:
L* (d1-d2)=L* (D1-D2) * (h/H)a*(z/Z)b, wherein a, b are parameter, 1.09 < a <, 1.15,1.08 < b
< 1.16；Preferably, the increase with h/H gradually increases, b is gradually increased with the increase of z/Z.
Compared with prior art, drying device of the invention has the advantage that
1) present invention for the first time connects the intake air temperature of drying device and coal-supplying amount, it is established that the intelligence of the two
It can control relationship, while intelligence can be carried out coal drying using the sun, it is energy saving, it is environmentally protective.
2) central controller automatic control is transported to quantity of hot air and/or conveyor belt speed in drying device, energy saving.
3) by the Boiler pressure control along conveyer belt direction, drying efficiency is substantially increased, ensure that dry optimal
Effect.
4) the optimal control relationship that optimal control quantity of hot air and transmission speed are obtained by numerous studies, is realized
Intelligentized drying control, reduces human intervention.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of a coal drying device of the invention.
Fig. 2 is the structural schematic diagram of another embodiment of coal drying device of the invention.
Fig. 3 is the flow diagram of coal drying device of the present invention.
Fig. 4 is the schematic diagram of solar energy coal drying device of the present invention.
Fig. 5 is another embodiment schematic diagram of solar energy coal drying device of the present invention.
Fig. 6 is the schematic diagram of drying device control system of the present invention.
Wherein, feeder 1, crushing device 2, admission line 3, dry section 4, main channel 5, conveyer belt 6, pulley 7, coal bunker 8,
Dry section air outlet slit 10, air outlet slit 11, bypass channel 12, blower 13, outlet temperature sensor 14, heat collector 15, air inducing
Machine 16, drying device 17, heat-exchanger rig 18, main road valve 19, bypass valve 20, central controller 21, admission line temperature pass
Sensor 22, flowmeter 23, header 24
Specific embodiment
Fig. 1-2 illustrates the structural schematic diagram of drying system, as shown in Figure 1, the drying system includes feeder 1, breaks
Crushing device 2, drying device 17, the drying device 17 include cabinet, temperature sensor, flow sensor, central controller 21
With conveyer belt 6, the conveyer belt 6 passes through cabinet, and temperature sensor includes inlet temperature sensor 22 and outlet temperature sensor
14, measurement enters the hot air temperature of drying device 17 and leaves the air themperature of drying device 17, the flow-velocity sensing respectively
Device 23 is used to measure the air velocity into drying device 17, so that the air mass flow into drying device 17 is calculated, import
Temperature sensor 22, outlet temperature sensor 14 and flow sensor 23 are attached with central controller 21.
Preferably, the hot-air enters drying device by admission line 3, the inlet temperature sensor 22 is arranged
In admission line 3.
The coal enters from coal breakage nozzle 1-1, is conveyed into crushing device 2 by belt 1-7, broken coal into
Enter to drying device 17, drying device case is then passed sequentially through by the belt-type conveying equipment with hole in drying device 17
Product is connected after body to coal bunker 8.
The air enters drying device 17 from the lower part of drying device 17, then passes through conveyer belt 6 to dry conveyer belt 6
The coal of upper conveying is finally discharged from the outlet of drying device 17, to complete the drying to coal.
As illustrated in fig. 1 and 2, the feeder 1 is belt-type bearing type feeder, including coal breakage nozzle 1-1, load-bearing carrying roller
1-2, weight sensor 1-3, velocity sensor 1-4, idler wheel 1-5 and driving motor 1-6, belt 1-7, driving motor 1-6 drive
Dynamic idler wheel 1-5 rotation, the revolving speed of the velocity sensor 1-4 measurement driving motor 1-6, to calculate the transmission speed of belt
Degree.The load-bearing carrying roller 1-2 is arranged in the lower part of belt 1-7 and tightly holds in the palm belt, and the weight sensor 1-3 is mounted on load-bearing
The lower part carrying roller 1-2 passes through the quality of the belt 1-7 coal transported for cooling water of units of measurement time.The velocity sensor 1-4,
Weight sensor 1-3 and 21 data connection of central controller.
As shown in fig. 6, the hot-air enters drying device 17 by admission line 3 under the guidance of blower 19, to coal
Charcoal is dried.The blower 19 carries out data connection with central controller 21.Central controller is according to the entrance pipe of measurement
The temperature of hot-air carrys out the revolving speed of adjust automatically driving motor 1-6, so as to adjust the transmission speed of belt pulley, controls the unit time
Coal-supplying amount.
The revolving speed of motor 1-6 is controlled by the inlet temperature of hot-air, so that coal-supplying amount is controlled, so that coal-supplying amount and sky
Efficient heat contained in gas is corresponding, so that hot-air is avoided excessively to cause heat loss, coal caused by avoiding hot-air very few
The drying effect of charcoal is bad.Can be energy saving by the Limestone control hot air flowrate of feeder, guarantee optimal drying
Effect.
In operation, if the air themperature into drying device 17 that central controller 21 measures declines, center control
Device 21 processed reduces the revolving speed of driving motor 1-6 automatically.If the Air Temperature into drying device 17 that central controller 21 measures
Degree rises, then central controller 21 increases the revolving speed of driving motor 1-6 automatically.By change driving motor revolving speed come change into
Enter the quality of the lignite of drying device 17, to guarantee that the lignite into drying device 17 keeps suitable quality, without excessively high, makes
It is bad at drying effect, without too low, cause hot-air to waste, to reach best drying effect.
Preferably, Fig. 5 illustrates another embodiment schematic diagram of solar energy brown coal drying device of the present invention.
As shown in figure 5, solar thermal collector heating hot-air a part by main channel 5 enter drying device 17, one
Part passes through bypass channel 12 into heat utilization device 18, on the main channel 5 that solar thermal collector 15 is connected with drying device 17
First blower 19 is set, and solar thermal collector 15, which is connected on bypass channel 12 with heat utilization device 18, is arranged the second blower 20, leads to
Cross the first blower 19, the second blower 20 power variation change enter drying device 17 and heat utilization device 18 stream of hot air
Amount.
Preferably, the conveyor belt speed and the quality of the lignite of unit time conveyer belt conveying remain unchanged.
Preferably, central controller 21 is adjusted according to the following formula, it may be assumed that the unit time enters drying device 17
The flow of hot-air × (into temperature-fiducial temperature of the hot-air of drying device 17)/unit time feeder transmission coal
Quality=constant.
Preferably, the flow that the unit time enters the hot-air of drying device 17 remains unchanged.
Preferably, the determination of constant size be according in normal operation " unit time enters the heat of drying device 17
The flow of air × (into temperature-fiducial temperature of the hot-air of drying device 17)/unit time feeder transmission coal
Quality " determines.
The quality of the coal of unit time feeder transmission is measured by weight sensor 1-3.
Preferably, constant can also be preset in the central controller according to pervious operation or according to experiment.
Preferably, fiducial temperature is 30-40 degrees Celsius, preferably 35 degrees Celsius.
In operation, when the temperature of measurement is the first temperature, driving motor 1-6 is blown with the first revolving speed；Work as measurement
Temperature when having risen to the second temperature bigger than the first temperature, driving motor 1-6 be higher than the second revolving speed of the first revolving speed into
Row rotation；When the temperature of measurement has risen to the third temperature bigger than second temperature, driving motor 1-6 is to be higher than the second revolving speed
Third revolving speed rotated；When the temperature of measurement has risen to four temperature bigger than third temperature, driving motor 1-6 with
The 4th revolving speed higher than third revolving speed is rotated；When the temperature of measurement has risen to five temperature bigger than the 4th temperature,
Driving motor 1-6 is rotated with the 5th revolving speed for being higher than the 4th revolving speed.
Preferably, the 5th temperature is greater than the 4th 3-5 degrees Celsius of temperature, the 4th temperature is greater than 3-5 degrees Celsius of third temperature,
Third temperature is greater than 3-5 degrees Celsius of second temperature, and second temperature is greater than 3-5 degrees Celsius of the first temperature.
Preferably, the 5th temperature is greater than the 4th 4.5-5 degrees Celsius of temperature, the 4th temperature is greater than third temperature 4-4.5 and takes the photograph
Family name's degree, third temperature are greater than 3.5-4 degrees Celsius of second temperature, and second temperature is greater than the 5th 3-3.5 degrees Celsius of temperature.
Preferably, the 5th revolving speed is 1.1-1.3 times of the 4th revolving speed, the 4th revolving speed is 1.1-1.3 times of third revolving speed,
Third revolving speed is 1.1-1.3 times of the second revolving speed, and the second revolving speed is 1.1-1.3 times of the first revolving speed.
Preferably, the 5th revolving speed is 1.3-1.24 times of the 4th revolving speed, the 4th revolving speed is the 1.24-1.18 of third revolving speed
Times, third revolving speed is 1.18-1.14 times of the second revolving speed, and the second revolving speed is 1.14-1.1 times of the first revolving speed.
By the preferred of above-mentioned temperature and the first rotation speed of fan, especially by setting for differential click revolving speed and the temperature difference
It is fixed, it can be further improved drying efficiency, save the time.It is found through experiments that, can be improved the drying efficiency of 8-13% or so.
Preferably, speed control unit is arranged in conveyer belt 6, speed control unit and central controller 21 carry out data company
It connects, central controller 21 controls the speed of conveyer belt 6 by speed control unit.
Preferably, speed control unit includes speed detecting component, 6 data of conveyer belt that speed detecting component will test
It is transmitted to central controller 21, central controller 21 adjusts the power of 6 motor of conveyer belt according to the data of detection.If detection
Speed be less than the data that are calculated of central controller 21, increase the power of motor, conversely, reducing the power of motor.It is preferred that
, the transmission speed of conveyer belt 6 is adjusted by the revolving speed of motor control transmission wheel 9.
Preferably, it is trapezoidal cavity that cabinet, which is cross section, electrically operated gate is arranged in entrance and exit, and the electrically operated gate is opened
Degree can be adjusted in above-below direction.Central controller 21 automatically adjusts opening for electrically operated gate according to the coal seam thickness of the coal of input
Degree, prevents aperture is excessive from causing energy loss, has reached energy saving purpose.
Preferably, the thickness in coal seam is to detect to obtain automatically by thickness detection apparatus, the thickness detection apparatus with
The thickness data in coal coal seam is transmitted to central controller 21 by programmable automatic controller data connection, thickness detector.It adopts
The major advantage for taking thickness detection apparatus is the automatic thickness data for obtaining coal coal seam, avoids and manually enters thickness data
Complicated procedures improve the efficiency and accuracy of drying.
Preferably, thickness detection apparatus is arranged near the entry position of drying device 17, such as is arranged in drying device
On bracket at 17 entry positions, and/or outside the drying device 17 of the certain distance apart from 17 entrance of drying device.It can also be with
By the way that the thickness detection apparatus of different location is arranged, repeatedly measures thickness and carry out calculated thickness average value.
Preferably, thickness detection apparatus includes infrared transmitter and infrared remote receiver, and infrared transmitter emits infrared ray and surveys
Plate thickness is measured, infrared remote receiver receives the thickness data of infrared transmitter transmission, and thickness data is transmitted to central control
Device 21.
Preferably, infrared transmitter includes horizontal the first infrared emission unit, the second infrared emission unit being equidistantly placed
With third infrared emission unit；Infrared remote receiver includes horizontal the first infrared receiver, the second infrared receiver being equidistantly placed
Unit and third infrared receiver, the first infrared receiver, the second infrared receiver and third infrared receiver with
First infrared emission unit, the second infrared emission unit and third infrared emission unit receive respectively the first infrared emission unit,
The infrared ray of second infrared emission unit and the transmitting of third infrared emission unit.By the way that multiple infrared emission units and red are arranged
Outer receiving unit can guarantee the accuracy of data by repeatedly measuring.It simultaneously can also be in part infrared emission unit and red
When outer receiving unit is damaged, the measurement to plate thickness is not influenced.
Preferably, infrared emission unit is arranged on the entrance bracket spaced apart across transmission belt, red
Outer receiving unit is arranged on the entry position of drying device 17, the first infrared receiver, the second infrared receiver and
Three infrared receivers are horizontal right respectively with the first infrared emission unit, the second infrared emission unit and third infrared emission unit
It answers.
Preferably, infrared receiving unit is arranged on the entrance bracket spaced apart across transmission belt, red
Outer transmitting unit is arranged on the entry position of drying device 17, the first infrared receiver, the second infrared receiver and
Three infrared receivers are horizontal right respectively with the first infrared emission unit, the second infrared emission unit and third infrared emission unit
It answers.
Preferably, the transmission speed of conveyer belt 6 is 0.6-0.8m/s.
Preferably, dry section 4 is arranged in cabinet, along 6 direction of transfer of conveyer belt, the distribution of 4 air mass flow of dry section
It gradually decreases.Make coal gradually decreasing with moisture content in this way, need the fewer and fewer of air, to save energy.
Preferably, along 6 direction of transfer of conveyer belt, the range of decrease of the air mass flow of dry section 4 is gradually decreased.If will stream
Amount S is set as the function of the distance x apart from 4 entrance of dry section, S=l (x), then in dry section 4, l ' (x) < 0, l " (x) < 0,
Middle l ' (x), l " (x) are the first order derivative and second derivative of l (x) respectively.
It is shown experimentally that, by the variation of above-mentioned air mass flow and the variation of amplification, the drying of coal can be made
Optimal effect is obtained, but also can be energy saving.Compared with air mass flow distribution is identical, the dry of 15-20% can be improved
Dry effect, it can save the energy of 15-20%.
Preferably, the variation of the flow of air is that following mode is realized.Wherein mode is first is that in 6 lower part of conveyer belt
Header 24 is set, as shown in Figure 1,24 top providing holes of the header, conveys air by the hole in header 24 to dry coal.
Preferably, along 6 direction of transfer of conveyer belt, the distribution density in the hole is smaller and smaller in dry section 4, as
It is preferred that the amplitude that the distribution density in the hole becomes smaller gradually decreases.Preferably, maximum density is the 1.2- of the smallest density
1.3 again.
By the variable density in above-mentioned hole, air mass flow may be implemented along the variation of 6 direction of transfer of conveyer belt.
Preferably, the variation of air mass flow can also be realized by the variation in aperture.Preferably, in dry section 4,
Along 6 direction of transfer of conveyer belt, the aperture in the hole is smaller and smaller, preferably, the amplitude that the aperture in the hole becomes smaller is gradually
It reduces.Preferably, maximum aperture is 1.2-1.3 times of the smallest aperture.
Preferably, the hole is circular hole.
Preferably, can realize the variation of air mass flow by the variation of the power of blower, as shown in Figure 2.
General pipeline is arranged in the air intake pipe of the drying device 17, and many isocons then are arranged by general pipeline, pass through
Isocon delivers air to 6 lower part of conveyer belt, is arranged multiple isocons along 6 transporting direction of conveyer belt, on each isocon
One blower 13 is set, as shown in fig. 6, realizing flow along point of 6 transporting direction of conveyer belt by the power for changing blower
Cloth.
Preferably, along 6 direction of transfer of conveyer belt, the power of the blower 13 is smaller and smaller in dry section 4, as
It is preferred that the amplitude that the power of the blower 13 becomes smaller gradually decreases.Preferably, maximum power is the 1.2- of the smallest power
1.3 again.
Preferably, the temperature of inlet air sensor is arranged on air intake pipe general pipeline.
Preferably, the blower 13 and 21 data connection of central controller, pass through the adjustable wind of central controller 21
The power of machine.
Admission line blower 19, the admission line blower 19 and central controller 21 are set on the admission line general pipeline
Data connection, central controller 21 are adjusted into total hot-air in drying device 17 by adjusting the power of blower 19
Amount.
In practical work process, an optimal pass is needed between the speed of conveyer belt 6 and the flow temperature of air
System, if the excessive velocities of conveyer belt 6, drying time is short, will affect dry mass, if the speed of conveyer belt 6 is excessively slow, does
The dry time is long, then may waste too many energy, and reducing efficiency similarly if air mass flow and temperature are too low, will affect dry
Drying quality will lead to if flow and temperature are excessively high and waste too many energy.Therefore through a large number of experiments, obtained best
Air mass flow, the relationship between air themperature and transmission speed.
The drying device 17, which can be realized, automatically adjusts air mass flow and transmission according to the moisture content of dry coal
6 transmission speed of band.Control mode is as follows: assuming that entering the unit time Coal Quality of conveyer belt 6 from crushing device as Z, matter
When to measure moisture content be H, the admission line air themperature into drying device 17 is D1, air mass flow L, leaves dry dress
The outlet air temperature for setting 17 is that D2 indicates the drying effect met certain condition when the transmission speed of conveyer belt 6 is S.
Above-mentioned unit time Coal Quality Z, quality moisture content H, admission line air themperature D1, air mass flow L, outlet air temperature
D2, conveyer belt 6 transmission speed S be known as standard quality, standard aqueous rate, standard admission line temperature, standard exit temperature, mark
Quasi- air mass flow, standard speed, i.e. normal data.The normal data is stored in central controller 21.
Normal data indicates the data of the drying effect met certain condition.Such as it can be and meet certain dry effect
Fruit, such as it is 0.04% that drying effect, which is coal moisture content, or when reaching certain drying effect, the energy of consuming is most
It is few.Certainly preferred condition is when reaching certain drying effect, and the least data of the energy of consuming are as normal data.
The temperature and speed adjusted by following formula also substantially can satisfy normal data certain condition achieved
Drying effect.
When unit time Coal Quality is z, quality moisture content is h, into the air of drying equipment flow l,
Admission line air themperature d1, outlet air temperature d2 and 6 transmission speed s of conveyer belt meet following three kinds of different operational modes
One of:
First mode: 6 transmission speed s of conveyer belt keeps standard speed S constant, and the flow l variation of air is as follows:
L* (d1-d2)=L* (D1-D2) * (h/H)a*(z/Z)b, wherein a, b are parameter, 1.09 < a <, 1.15,1.08 < b
< 1.16；Preferably, a=1.12, b=1.14；It is preferred that a is gradually increased with the increase of h/H, b with z/Z increase gradually
Increase.
Second mode: l keeps normal flow L constant, and the transmission speed s variation of conveyer belt 6 is as follows:
(S/s) * (d1-d2)=(D1-D2) * (h/H)c*(z/Z)d, wherein c, d are parameter, 1.08 < c < 1.15,1.18
< d < 1.22；Preferably, c=1.1`, d=1.20；
The third mode: l and s is variable, and the relationship of the transmission speed of air mass flow and conveyer belt 6 is as follows:
(S*l* (d1-d2))/(s*L* (D1-D2))=g* (h/H)e*(z/Z)f, wherein g, e, f are parameter, and g meets as follows
Formula:
1,0.92 < g < 0.97 of (S*l* (d1-d2))/(s*L* (D1-D2)) >；Preferably, g=0.95；
1,1.03 < g < 1.06 of (S*l* (d1-d2))/(s*L* (D1-D2)) <；Preferably, g=1.05；
(S*l* (d1-d2))/(s*L* (D1-D2))=1,0.97 < g < 1.03；Preferably, g=1；
Preferably, the third mode chooses ((1 one l/L)2+(1-s/S)2) the smallest one group of l and s of value；It can certainly select
The l and s that first group meets the requirements are selected, one group can also be randomly choosed from the l and s for meet condition；
1.08 < e <, 1.13,1.14 < f < 1.18；Preferably, e=1.10, f=1.16.
Wherein need to meet following condition: 0.9 < l/L <, 1.1,0.9 < s/S < in the formula of above-mentioned Three models
1.1。
Above-mentioned formula is to fully meet the needs of coal actual drying by a large amount of actual verification.
In practical applications, multiple groups normal data is stored in central controller 21, then central controller 21 is according to user
The data (the coal quantity and coal moisture content of unit time) of input are meeting 0.9 < s/S <, 1.1,0.9 < l/L < 1.1
In the case of, suitable normal data is being automatically selected as foundation.
Preferably, in the case of there is two groups or multiple groups normal data, the normal data of user's selection can be provided
Interface, preferred, system can automatically select ((1-l/L)2+(1-s/S)2) value it is one the smallest.
The Three models can only store one kind in central controller 21, also can store two kinds or three kinds in
It entreats in controller 21.
In the formula of front, d1, d2 are obtained by temperature sensor real-time detection, are obtained by temperature sensor 14,22；
And quality moisture content is h by way of detecting be manually entered in advance, and Coal Quality is that z can be surveyed by weight sensor
Amount.Central controller 21 detects the transmission speed of conveyer belt 6 at this time.
Preferably, when being adjusted to air mass flow, the power of fan of all dry sections 4 takes identical increasing
Width or the range of decrease, such as all increase by 10% simultaneously.
Preferably, when being adjusted to air mass flow, all 4 power of fan of dry section take different amplification
Or the range of decrease, with the direction of transfer of conveyer belt 6, the amplitude that the power of fan of dry section 4 increases or decreases is gradually decreased, example
Such as, along the direction of transfer of conveyer belt 6, the power of fan increase by 15% of front is subsequent to successively increase 12%, 11%, etc..
In the formula of front, air mass flow is the air total flow into drying equipment.Preferably, the flow is examined
Device 23 is surveyed to be arranged on admission line general pipeline.
The invention also discloses a kind of methods for realizing drying equipment intelligent operation, include the following steps:
1) store one group or multiple groups normal data in central controller 21 first: unit time Coal Quality is Z, matter
Measure moisture content be H, the transmission speed S of admission line air themperature D1, air mass flow L, outlet air temperature D2, conveyer belt 6；
2) coal unit mass and water content are inputted in operation interface；Certainly, unit time Coal Quality can pass through
Central controller 21 detects automatically；
3) according to the unit mass and water content of the coal of input, user selects to execute or hold automatically central controller 21
Row (such as only a kind of operational mode in the case where) one of three modes below:
First mode: 6 transmission speed s of conveyer belt keeps standard speed S constant, and the flow l variation of air is as follows:
L* (d1-d2)=L* (D1-D2) * (h/H)a*(z/Z)b, wherein a, b are parameter, 1.09 < a <, 1.15,1.08 < b
< 1.16；Preferably, a=1.12, b=1.14；
Second mode: l keeps normal flow L constant, and the transmission speed s variation of conveyer belt 6 is as follows:
(S/s) * (d1-d2)=(D1-D2) * (h/H)c*(z/Z)d, wherein c, d are parameter, 1.08 < c < 1.15,1.18
< d < 1.22；Preferably, c=1.1`, d=1.20
The third mode: l and s is variable, and the relationship of the transmission speed of air mass flow and conveyer belt 6 is as follows:
(S*l* (d1-d2))/(s*L* (D1-D2))=g* (h/H)e*(z/Z)1, wherein g, e, l are parameter, and g meets as follows
Formula:
1,0.92 < g < 0.97 of (S*l* (d1-d2))/(s*L* (D1-D2)) >；Preferably, g=0.95；
1,1.03 < g < 1.06 of (S*l* (d1-d2))/(s*L* (D1-D2)) <；Preferably, g=1.05；
(S*l* (d1-d2))/(s*L* (D1-D2))=1,0.97 < g < 1.03；Preferably, g=1；
Preferably, the third mode chooses ((1-l/L)2+(1-s/S)2) the smallest one group of l and s of value；It can certainly select
The l and s that first group meets the requirements are selected, one group can also be selected immediately from the l and s for meet condition；
1.08 < e <, 1.13,1.14 < l < 1.18；Preferably, e=1.10, l=1.16.
Wherein need to meet following condition: 0.9 < l/L <, 1.1,0.9 < s/S < in the formula of above-mentioned Three models
1.1。
4) drying device 17 starts to carry out drying operation.
Preferably, inputting multiple groups normal data in step 1)；
Preferably, in the case of there is two groups or multiple groups normal data, what user can be selected by user interface
Normal data.
In practical applications, multiple groups normal data is stored in central controller 21, then central controller 21 is according to user
The data (unit time Coal Quality and coal moisture content) of input are meeting 0.9 < s/S <, 1.1,0.9 < l/L <, 1.1 feelings
Under condition, suitable normal data is being automatically selected as foundation.
Preferably, in the case of there is two groups or multiple groups normal data, the normal data of user's selection can be provided
Interface, preferred, system can automatically select ((1-l/L)2+(1-s/S)2) value it is one the smallest.
Preferably, entering heat utilization device 18 from the hot-air that drying device 17 comes out, to carry out UTILIZATION OF VESIDUAL HEAT IN.Into
One step is preferred, and the heat utilization device 18 is boiler, and it is combustion-supporting to carry out that the hot-air is directly entered boiler.
Preferably, the heat utilization device 18 is hot water storage tank.
It is heated preferably, the air direct circulation that heat utilization device 18 comes out enters in heat collector 15.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Claims (8)
1. a kind of hot-air drying system, the drying system includes feeder, crushing device and drying device, the feeder
Including coal breakage nozzle, idler wheel and driving motor, belt, driving motor driving idler wheel rotates and belt is driven to rotate, the coal
Charcoal enters from coal breakage nozzle, and crushing device is entered after belt transport, and broken coal enters drying device from crushing device
The drying device includes cabinet, temperature sensor, flow sensor and conveyer belt, and the conveyer belt passes through cabinet, temperature
Spending sensor includes inlet temperature sensor, and measurement enters the hot air temperature of drying device, inlet temperature sensor and center
Controller carries out data connection；
Central controller according to the hot air temperature into drying device of measurement come the revolving speed of adjust automatically driving motor, thus
The transmission speed for adjusting belt pulley, controls the coal-supplying amount of unit time；
The hot-air enters drying device from the lower part of drying device, then passes through conveyer belt to dry and convey on conveyer belt
Coal is finally discharged from the outlet of drying device, to complete the drying to coal；
The air intake pipe of the drying device includes general pipeline, many isocons of the general pipeline connection, will be empty by isocon
Gas is transported to conveyer belt lower part, and multiple isocons are arranged along conveyer belt transporting direction, a blower is arranged on each isocon,
Along conveyer belt direction of transfer, the power of the blower is smaller and smaller.
2. drying system as described in claim 1, which is characterized in that if central controller measurement into drying device
Air themperature decline, then central controller reduces the revolving speed of driving motor automatically；If central controller measurement enters drying
The air themperature of device rises, then central controller increases the revolving speed of driving motor automatically.
3. drying system as claimed in claim 2, which is characterized in that central controller is adjusted according to the following formula, it may be assumed that
Unit time enters flow × (into temperature-fiducial temperature of the hot-air of drying device) of the hot-air of drying device/mono-
Quality=constant of the coal of position time feeder transmission；Fiducial temperature is 30-40 degrees Celsius.
4. drying system as claimed in claim 3, constant are preset in the central controller.
5. drying system as claimed in claim 2, when the temperature of measurement is the first temperature, driving motor with the first revolving speed into
Row air-supply；When the temperature of measurement has risen to the second temperature bigger than the first temperature, driving motor is to be higher than the first revolving speed
Second revolving speed is rotated；When the temperature of measurement has risen to the third temperature bigger than second temperature, driving motor is to be higher than
The third revolving speed of second revolving speed is rotated；When the temperature of measurement has risen to four temperature bigger than third temperature, driving
Motor is rotated with the 4th revolving speed for being higher than third revolving speed；When the temperature of measurement has risen to fiveth temperature bigger than the 4th temperature
When spending, driving motor is rotated with the 5th revolving speed for being higher than the 4th revolving speed.
6. drying system as claimed in claim 5, the 5th temperature is greater than the 4th 3-5 degrees Celsius of temperature, and the 4th temperature is greater than the
Three 3-5 degrees Celsius of temperature, third temperature are greater than 3-5 degrees Celsius of second temperature, and second temperature is greater than 3-5 degrees Celsius of the first temperature.
7. drying system as claimed in claim 6, the 5th temperature is greater than the 4th 4.5-5 degrees Celsius of temperature, and the 4th temperature is greater than
4-4.5 degrees Celsius of third temperature, third temperature are greater than 3.5-4 degrees Celsius of second temperature, and second temperature is greater than the 5th temperature 3-3.5
Degree Celsius.
8. drying system as claimed in claim 5, the 5th revolving speed is 1.1-1.3 times of the 4th revolving speed, and the 4th revolving speed is third
1.1-1.3 times of revolving speed, third revolving speed are 1.1-1.3 times of the second revolving speed, and the second revolving speed is 1.1-1.3 times of the first revolving speed.
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| CN116817572B (en) * | 2023-08-31 | 2023-12-15 | 昆明冬冬食品有限公司 | Drying equipment for food processing with heat recycling function |
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| EP1516544B1 (en) * | 2003-09-19 | 2007-06-27 | Hauni Maschinenbau AG | Drying plant for tobacco and method for drying tobacco |
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