CN106322965B - A kind of solar energy brown coal drying system according to inlet air temp Intelligent adjustment power of fan - Google Patents
A kind of solar energy brown coal drying system according to inlet air temp Intelligent adjustment power of fan Download PDFInfo
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- CN106322965B CN106322965B CN201610841439.6A CN201610841439A CN106322965B CN 106322965 B CN106322965 B CN 106322965B CN 201610841439 A CN201610841439 A CN 201610841439A CN 106322965 B CN106322965 B CN 106322965B
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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
- F26B15/02—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 the whole or part of a circle
- F26B15/04—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 the whole or part of a circle in a horizontal plane
-
- 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
-
- 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
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- 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
-
- 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
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of solar energy brown coal drying system, including solar thermal collector and drying device, air enter solar thermal collector by air-introduced machine, and solar energy is absorbed in solar thermal collector, hot-air is formed, the hot-air enters drying device under the guiding of blower fan, lignite is dried；The hot-air enters drying device by admission line, temperature sensor and flow sensor are set on the admission line, the temperature sensor is used to measure the air themperature for entering drying device, and the flow sensor is used to detect the hot air flowrate for being dried device；The temperature sensor and flow sensor carry out data cube computation with central controller；The central controller automatically controls the power of blower fan according to the air themperature of the entrance drying device of measurement.The present invention can utilize the size of the hot air temperature Based Intelligent Control blower fan for entering drying device, while intellectuality carries out brown coal drying, energy saving, environmental protection using solar energy.
Description
Technical field
The invention belongs to solar energy and dry crossing domain, more particularly to a kind of utilization solar energy is dried to lignite
Apparatus and method.
Background technology
Lignite as one of main disposable energy of country, but moisture is high, calorific value is low, easy spontaneous combustion the features such as, lignite
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 brown coal drying and dehydrating, the technical research of raising unit mass lignite caloric value and popularization are very important.Steam pipe
Swinging lignite predry drying system, after moisture content wet lignite high is dried in steam tube rotary drier, is sent to and matches somebody with somebody
There is grinding in the pulverized coal preparation system of medium-speed pulverizer, then burnt in boiler.Because the most of moisture in lignite is evaporated
Come, the low heat valve of unit mass lignite is improved, while also reducing exhaust gas volumn and the flue gas loss of boiler.By following
Be carried out for steam in lignite by ring carrier gas, and cooling tower and heat exchanger reclaim heat and moisture, and unit reality water consumption drops significantly
It is low.Because lignite water content is larger, the drying capacity requirement for pulverized coal preparation system is high；And volatile matter is higher, coal dust is easily sent out
Be conigenous fire it is fried.
Research to lignite dehydration upgrading technology has started to turn into domestic and international focus, and foreign countries have done numerous studies to this, brown
Coal dewatering upgrading technology is more, and can substantially be divided 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 disposal ability and dewatering efficiency is required.Dehydration by evaporation method, profit
With the heating lignite that the media such as deep fat, hot-air, superheated steam are direct or indirect, moisture in lignite is set to remove in a gaseous form.
Dehydration by evaporation technique needs substantial amounts of energy to evaporate moisture, and energy consumption is big.Non-evaporating dehydrolysis method be broadly divided into hydro-thermal process method and
Mechanical hot pressing evaporation, the moisture in lignite is removed in liquid form.Non-evaporating dehydrolysis method, complex process is relatively costly, mesh
It is preceding not put into commercial Application.Additionally, the problems such as non-evaporating dehydrolysis method also brings waste water, exhaust-gas treatment.
It is domestic to study relatively few in terms of lignite dehydration upgrading, report less.Domestic lignite dehydration process for upgrading master
There are flue gas drying method and sheet using super-heated steam.The former is high due to lignite volatile matter, is influenceed by EAT, easily on fire
Burning, drying efficiency is low, and equipment is huge, and investment cost is high.The latter by the use of high-grade energy superheated steam as thermal source, into
This costliness, energy-output ratio is big, is not suitable for China's national situation.
Therefore need a kind of power consumption of exploitation badly few, discharge small, low cost, it is safe and reliable and the green of Based Intelligent Control can be carried out
Color lignite dehydration technique.
The content of the invention
For the shortcoming of currently available technology, it is an object of the invention to provide a kind of solar energy lignite of new Based Intelligent Control
Drying device, solves disadvantages mentioned above.
To achieve these goals, technical scheme is as follows：A kind of solar energy brown coal drying system, including the sun
Energy heat collector and drying device, air enter solar thermal collector by air-introduced machine, and absorb solar energy in solar thermal collector
The heat of heat collector, forms hot-air, and the hot-air enters drying device under the guiding of blower fan, lignite is dried；
The hot-air enters drying device by admission line, and temperature sensor and flow are set on the admission line
Sensor, the temperature sensor be used for measure enter drying device air themperature, the flow sensor be used for detect into
The hot air flowrate of row drying device；The temperature sensor and flow sensor carry out data cube computation with central controller；
The central controller automatically controls the power of blower fan according to the air themperature of the entrance drying device of measurement.
Preferably, if the hot air temperature of the entrance drying device of central controller measurement declines, center controls
Device increases the power of blower fan automatically；If the air themperature of the entrance drying device of central controller measurement rises, center control
Device processed reduces the power of blower fan automatically.
Preferably, a hot-air part for solar thermal collector heating enters drying device by main channel, a part
Heat utilization device is entered by bypass channel, the first blower fan is set on the pipeline that solar thermal collector is connected with drying device, too
It is positive can heat collector be connected with heat utilization device on pipeline the second blower fan be set, by the first blower fan, the change of the power of the second blower fan
Change the hot air flowrate for changing and entering drying device and heat utilization device.
Preferably, if the hot air temperature of the entrance drying device of central controller measurement declines, center controls
Device increases the power of the first blower fan automatically, while reducing the power of the second blower fan；If the entrance drying of central controller measurement
The hot air temperature of device rises, then central controller reduces the power of the first blower fan automatically, while increasing the work(of the second blower fan
Rate.
Preferably, when the temperature of measurement is the first temperature, blower fan is blown with the first power；When the temperature of measurement
When have decreased to the second temperature lower than the first temperature, blower fan is blown with the second power higher than the first power；Work as measurement
At a temperature of when falling below three temperature lower than second temperature, blower fan is blown with the 3rd power higher than the second power；
When four temperature lower than the 3rd temperature is fallen below at a temperature of measurement, blower fan is carried out with the 4th power higher than the 3rd power
Air-supply；When five temperature lower than the 4th temperature is fallen below at a temperature of measurement, blower fan is with the 5th work(higher than the 4th power
Rate is blown.
Preferably, the 5th temperature is less than the 4th 3-5 degrees Celsius of temperature, the 4th temperature is less than the 3rd 3-5 degrees Celsius of temperature,
3rd temperature is less than 3-5 degrees Celsius of second temperature, and second temperature is less than 3-5 degrees Celsius of the first temperature.
Preferably, the 5th temperature is less than the 4th 4.5-5 degrees Celsius of temperature, the 4th temperature is taken the photograph less than the 3rd temperature 4-4.5
Family name's degree, the 3rd temperature is less than 3.5-4 degrees Celsius of second temperature, and second temperature is less than 3-3.5 degrees Celsius of the first temperature.
Preferably, the 5th power is 1.08-1.28 times of the 4th power, the 4th power is the 1.08- of the 3rd power
1.28 times, the 3rd power is 1.08-1.28 times of the second power, and the second power is 1.08-1.28 times of the first power.
Preferably, the 5th power is 1.28-1.23 times of the 4th power, the 4th power is the 1.23- of the 3rd power
1.19 times, the 3rd power is 1.19-1.12 times of the second power, and the second power is 1.12-1.08 times of the first power.
Preferably, the drying device include casing, conveyer belt, the conveyer belt pass through casing, the hot-air from
The bottom of drying device enters drying device, then passes through conveyer belt to dry the lignite conveyed on conveyer belt, finally from drying
The outlet discharge of device, so as to complete the drying to lignite；
Along conveyer belt direction of transfer, the distribution of hot air flowrate is gradually reduced in drying device, if set flow V
It is the function apart from x apart from dry section entrance, V=O (x), then in dry section, O'(x)<0, wherein O'(x) it is the one of O (x)
Subderivative.
Preferably, along conveyer belt direction of transfer, the range of decrease of the air mass flow in drying device is gradually reduced, i.e. O "
(x)<0, O " (x) is the second derivative of O (x).
Preferably, setting header in conveyer belt bottom, providing holes in the header conveys air by the hole in header
Carry out drying brown coal.
Preferably, along conveyer belt direction of transfer, the distribution density in the hole is less and less.
Preferably, along conveyer belt direction of transfer, the amplitude that the distribution density in the hole diminishes gradually is reduced.
Preferably, the density of maximum is 1.2-1.3 times of minimum density.
Preferably, assume to enter into the unit interval lignite quality of conveyer belt for M, quality moisture content be W when, enter
Enter the admission line hot air temperature of drying device for T1, air mass flow are O, the outlet hot air temperature for leaving drying device is
T2, when the transfer rate of conveyer belt is V, expression meets the drying effect of certain condition；Above-mentioned unit interval lignite matter
Amount M, quality moisture content W, admission line air themperature T1, air mass flow O, outlet air temperature T2, the transfer rate V of conveyer belt
Referred to as Reference mass, benchmark moisture content, benchmark admission line temperature, reference outlet temperature, baseline air flow, reference speed,
That is reference data；Described reference data storage is in the central controller；
When unit interval lignite quality is that m, quality moisture content are w, flow o into the air of drying equipment,
Admission line air themperature t1, outlet air temperature t2 and conveyer belt transfer rate v meet following operational mode：
Conveyer belt transfer rate v keeps reference speed V constant, and the flow o changes of air are as follows：
O* (t1-t2)=O* (T1-T2) * (w/W)a*(m/M)b, wherein a, b are parameter, 1.09<a<1.15,1.08<b<
1.16；Preferably, the increase with w/W gradually increases, b gradually increases with the increase of m/M.
Compared with prior art, drying device of the invention has the following advantages：
1) present invention can utilize the size of the hot air temperature Based Intelligent Control blower fan for entering drying device, while intelligent
Brown coal drying, energy saving, environmental protection are carried out using solar energy.
2) central controller is automatically controlled and is transported to quantity of hot air and/or line speed, energy saving in drying device.
3) by the Boiler pressure control along conveyer belt direction, drying efficiency is substantially increased, it is ensured that dry optimal
Effect.
4) the optimal control relationship of optimal control quantity of hot air and transfer rate is drawn by numerous studies, is realized
Intelligentized drying control, reduces human intervention.
Brief description of the drawings
Fig. 1 is the schematic diagram of solar energy brown coal drying device of the present invention.
Fig. 2 is another embodiment schematic diagram of solar energy brown coal drying device of the present invention.
Fig. 3 is the schematic flow sheet of brown coal drying device of the present invention.
Fig. 4 is the schematic diagram that brown coal drying device of the present invention is preferably controlled.
Fig. 5 is the structural representation of one embodiment of a brown coal drying device of the invention.
Fig. 6 is the structural representation of another embodiment of brown coal drying device of the invention.
Wherein, 1 coal bunker, 2 breakers, 3 admission lines, 4 dry sections, 5 main channels, 6 conveyer belts, 7 pulleys, 8 coal bunkers, 10
Dry section air outlet slit, 12 bypass channels, 13 blower fans, 14 outlet temperature sensors, 15 heat collectors, 16 air-introduced machines, 17 dry dress
Put, 18 heat-exchanger rigs, 19 blower fans, 20 blower fans, 21 central controllers, 22 admission line temperature sensors, 23 flowmeters, 24 collection
Case.
Specific embodiment
Fig. 1 illustrates a kind of solar energy brown coal drying system, including solar thermal collector 15 and drying device 17, and air leads to
Cross air-introduced machine 16 and enter solar thermal collector 15, and the heat of solar energy is absorbed in solar thermal collector 15, form hot-air,
The hot-air enters drying device under the guiding of blower fan 19, and lignite is dried.
As shown in figure 3, the hot-air enters drying device 17 by admission line 3, temperature is set on the admission line 3
Degree sensor 22 and flow sensor 23, the temperature sensor 22 are used to measure the hot air temperature for entering drying device 17,
The flow sensor 23 is used to detect the hot air flowrate for being dried device 17；The temperature sensor 22 and flow sensing
Device 23 carries out data cube computation with central controller 21；
The central controller 21 automatically controls blower fan 19 according to the hot air temperature of the entrance drying device 17 of measurement
Power.
In operation, if the air themperature of the entrance drying device 17 of the measurement of central controller 21 declines, center control
Device processed 21 increases the power of blower fan 19 automatically.If in the air themperature of the entrance drying device 17 of the measurement of central controller 21
Rise, then central controller 21 reduces the power of blower fan 19 automatically.Changed by changing the power of blower fan 19 and enter drying device
17 hot air flowrate come ensure enter drying device 17 hot-air total effective heat exchange amount (i.e. efficiency) substantially keep not
Become, it is to avoid the excessive or deficiency of the energy.
Preferably, Fig. 2 illustrates another embodiment schematic diagram of solar energy brown coal drying device of the present invention.
As shown in Fig. 2 a hot-air part for solar thermal collector heating enters drying device 17, one by main channel 5
Part enters heat utilization device 18 by bypass channel 12, on the main channel 5 that solar thermal collector 15 is connected with drying device 17
First blower fan 19 is set, and solar thermal collector 15 is connected with heat utilization device 18 and the second blower fan 20 is set on bypass channel 12, is led to
Cross the first blower fan 19, the change of the power of the second blower fan 20 changes the stream of hot air for entering drying device 17 and heat utilization device 18
Amount.
If preferably, the hot air temperature decline of the entrance drying device 17 of the measurement of central controller 21, center
Controller increases the power of the first blower fan 19 automatically, while reducing the power of the second blower fan 20；If central controller 21 is measured
Entrance drying device 17 hot air temperature rise, then central controller 21 automatically reduce the first blower fan 19 power, while
Increase the power 20 of the second blower fan.
By adjusting the power of blower fan 20, the hot-air quantity that further can quickly meet into drying device 17 reaches
Most preferably.
Preferably, the quality of described line speed and the lignite of unit interval conveyer belt conveying keeps constant.
Preferably, central controller 21 is adjusted according to equation below, i.e.,：Unit interval enters drying device 17
The flow of hot-air × (unit interval enters the temperature-fiducial temperature of the hot-air of drying device 17)=constant.
Preferably, the determination of constant size is the flow of the hot-air according to normal operating entrance drying device 17
× (entering the temperature-fiducial temperature of the hot-air of drying device 17) determines.
Preferably, constant can also preset in the central controller according to former 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, blower fan 19 is blown with the first power；When the temperature of measurement
When have decreased to the second temperature lower than the first temperature, blower fan 19 is blown with the second power higher than the first power；Work as survey
When three temperature lower than second temperature is fallen below at a temperature of amount, blower fan 19 is sent with the 3rd power higher than the second power
Wind；When four temperature lower than the 3rd temperature is fallen below at a temperature of measurement, blower fan 19 is with the 4th work(higher than the 3rd power
Rate is blown；When five temperature lower than the 4th temperature is fallen below at a temperature of measurement, blower fan 19 is with higher than the 4th power
The 5th power blown.
Preferably, the 5th temperature is less than the 4th 3-5 degrees Celsius of temperature, the 4th temperature is less than the 3rd 3-5 degrees Celsius of temperature,
3rd temperature is less than 3-5 degrees Celsius of second temperature, and second temperature is less than 3-5 degrees Celsius of the first temperature.
Preferably, the 5th temperature is less than the 4th 4.5-5 degrees Celsius of temperature, the 4th temperature is taken the photograph less than the 3rd temperature 4-4.5
Family name's degree, the 3rd temperature is less than 3.5-4 degrees Celsius of second temperature, and second temperature is less than 3-3.5 degrees Celsius of the first temperature.
Preferably, the 5th power is 1.08-1.28 times of the 4th power, the 4th power is the 1.08- of the 3rd power
1.28 times, the 3rd power is 1.08-1.28 times of the second power, and the second power is 1.08-1.28 times of the first power.
Preferably, the 5th power is 1.28-1.23 times of the 4th power, the 4th power is the 1.23- of the 3rd power
1.19 times, the 3rd power is 1.19-1.12 times of the second power, and the second power is 1.12-1.08 times of the first power.
By the preferred of said temperature and the first power of fan, especially by setting for differential power of fan and the temperature difference
It is fixed, drying efficiency can be further improved, it is time-consuming.It is found through experiments that, it is possible to increase 10-15%'s or so dries effect
Rate.
Fig. 5-6 illustrates the brown coal drying device that a kind of utilization hot-air is dried to lignite, as shown in figure 5, described
Drying device includes coal bunker 1, breaker 2, drying device 17, and the drying device 17 includes casing, temperature sensor, flow velocity
Sensor, central controller 21 and conveyer belt 6, the conveyer belt 6 include inlet temperature sensor through casing, temperature sensor
22 and outlet temperature sensor 14, measure respectively into drying device 17 hot air temperature and leave the air of drying device 17
Temperature, the flow sensor 23 is used to measure the air velocity for entering drying device 17, and drying device is entered so as to calculate
17 air mass flow, admission line temperature sensor 22, outlet temperature sensor 14 and flow sensor 23 are controlled with center
Device 21 is attached.
Coal bunker 1 is connected to breaker 2 by raw coal conveying equipment, and broken lignite is transferred to drying by breaker 2
Device, product is connected after then passing sequentially through drying device casing by the belt-type conveying equipment with hole in drying device
Coal bunker 8.
The air enters drying device 17 from the bottom of drying device 17, then passes through conveyer belt 6 to dry conveyer belt 6
The lignite of upper conveying, finally discharges, from the outlet of drying device 17 so as to complete the drying to lignite.
Preferably, conveyer belt 6 sets speed control unit, speed control unit carries out data company with central controller 21
Connect, central controller 21 controls the speed of conveyer belt 6 by speed control unit.
Preferably, speed control unit includes speed detecting component, the data of conveyer belt 6 that speed detecting component will be detected
Central controller 21 is sent to, central controller 21 adjusts the power of the motor of conveyer belt 6 according to the data of detection.If detection
The data that are calculated less than central controller 21 of speed, increase the power of motor, conversely, reducing the power of motor.It is preferred that
, the transfer rate of conveyer belt 6 is adjusted by the rotating speed of motor control transmission wheel 9.
Preferably, it is trapezoidal cavity that casing is cross section, entrance and exit sets electrically operated gate, 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 lignite of input
Degree, prevents that aperture is excessive to cause energy loss, has reached the purpose of energy saving.
Preferably, the thickness in coal seam is obtained by thickness detection apparatus automatic detection, the thickness detection apparatus with
The thickness data in lignite coal seam is sent to central controller 21 by programmable automatic controller data cube computation, thickness detector.Adopt
The major advantage for taking thickness detection apparatus is the thickness data for obtaining lignite coal seam automatically, it is to avoid manually enter thickness data
Complicated procedures, improve efficiency and the degree of accuracy of drying.
Preferably, thickness detection apparatus are arranged near the entry position of drying device 17, for example, be arranged on drying device
At 17 entry positions, and/or on support outside the drying device 17 of certain distance apart from the entrance of drying device 17.Can also
By setting the thickness detection apparatus of diverse location, repeatedly measurement thickness carrys out calculated thickness average value.
Preferably, thickness detection apparatus include infrared transmitter and infrared remote receiver, and infrared transmitter transmitting infrared ray is surveyed
Amount sheet metal thickness, infrared remote receiver receives the thickness data of infrared transmitter transmission, and thickness data is sent into central control
Device 21.
Preferably, infrared transmitter includes the first infrared emission unit, the second infrared emission unit that level is equidistantly placed
With the 3rd infrared emission unit；Infrared remote receiver includes the first infrared receiver, the second infrared receiver that level is equidistantly placed
Unit and the 3rd infrared receiver, the first infrared receiver, the second infrared receiver and the 3rd infrared receiver with
First infrared emission unit, the second infrared emission unit and the 3rd infrared emission unit receive respectively the first infrared emission unit,
Second infrared emission unit and the infrared ray of the 3rd infrared emission unit transmitting.By setting multiple infrared emission units and red
Outer receiving unit, can be by repeatedly measurement, it is ensured that the accuracy of data.Simultaneously can also be in part infrared emission unit and red
When outer receiving unit is damaged, the measurement to sheet metal thickness is not influenceed.
Preferably, infrared emission unit is arranged on the entrance support across transmission belt spaced apart, 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 and the first infrared emission unit, the second infrared emission unit and the 3rd infrared emission unit difference level pair
Should.
Preferably, infrared receiving unit is arranged on the entrance support across transmission belt spaced apart, red
Emission unit is arranged on the entry position of drying device 17, the first infrared receiver, the second infrared receiver and
Three infrared receivers and the first infrared emission unit, the second infrared emission unit and the 3rd infrared emission unit difference level pair
Should.
Preferably, the transfer rate of conveyer belt 6 is 0.6-0.8m/s.
Preferably, dry section 4 is set in casing, along the direction of transfer of conveyer belt 6, the distribution of the air mass flow of dry section 4
Gradually reduce.So cause lignite with moisture content gradually reduce, it is necessary to air it is fewer and feweri, so as to save energy.
Preferably, along the direction of transfer of conveyer belt 6, the range of decrease of the air mass flow of dry section 4 is gradually reduced.If will stream
Amount V is set to the function apart from x apart from the entrance of dry section 4, V=O (x), then in dry section 4, O'(x)<0,O”(x)<0, wherein
O'(x), O " (x) is respectively the first order derivative and second derivative of O (x).
It is shown experimentally that, by the change and the change of amplification of above-mentioned air mass flow, the drying of lignite can be caused
Optimal effect is obtained, but also being capable of energy saving.Compared with air mass flow distribution is identical, the dry of 15-20% can be improved
Dry effect, you can to save the energy of 15-20%.
Preferably, the change of the flow of air is such a way realizing.Wherein mode one is in the bottom of conveyer belt 6
Header 24 is set, as shown in figure 5, the top providing holes of the header 24, air is conveyed come drying brown coal by the hole in header 24.
Preferably, in dry section 4, along the direction of transfer of conveyer belt 6, the distribution density in the hole is less and less, as
It is preferred that, the amplitude that the distribution density in the hole diminishes gradually is reduced.Preferably, the density of maximum is the 1.2- of minimum density
1.3 times.
By the variable density in above-mentioned hole, it is possible to achieve air mass flow along the direction of transfer of conveyer belt 6 change.
Preferably, the change of air mass flow can also be realized by the change in aperture.Preferably, in dry section 4,
Along the direction of transfer of conveyer belt 6, the aperture in the hole is less and less, preferably, the amplitude that the aperture in the hole diminishes is gradually
Reduce.Preferably, the aperture of maximum is 1.2-1.3 times of minimum aperture.
Preferably, described hole is circular hole.
Preferably, the change of air mass flow can be realized by the change of the power of blower fan, as shown in Figure 6.
The air intake pipe of the drying device 17 sets house steward, then sets many isocons by house steward, passes through
Isocon delivers air to the bottom of conveyer belt 6, multiple isocons is set along the transporting direction of conveyer belt 6, on each isocon
Set a blower fan 13, as shown in fig. 6, realized by changing the power of blower fan flow along the transporting direction of conveyer belt 6 point
Cloth.
Preferably, in dry section 4, along the direction of transfer of conveyer belt 6, the power of the blower fan 13 is less and less, as
It is preferred that, the amplitude that the power of the blower fan 13 diminishes gradually is reduced.Preferably, the power of maximum is the 1.2- of minimum power
1.3 times.
Preferably, described temperature of inlet air sensor is arranged on air intake pipe house steward.
Preferably, the blower fan 13 and the data cube computation of central controller 21, wind can be adjusted by central controller 21
The power of machine.
Admission line blower fan 19, the admission line blower fan 19 and central controller 21 are set on the admission line house steward
Data cube computation, central controller 21 is adjusted into the total hot-air in drying device 17 by adjusting the power of blower fan 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, can influence dry mass, if the speed of conveyer belt 6 is excessively slow, does
The dry time is long, then may waste too many energy, reduces efficiency, similarly, if air mass flow and temperature are too low, can influence to do
Drying quality, if flow and temperature are too high, can cause to waste too many energy.Therefore by substantial amounts of experiment, drawn optimal
Air mass flow, the relation between air themperature and transfer rate.
Described drying device 17 can be realized automatically adjusting air mass flow and transmission according to the moisture content of drying brown coal
6 transfer rates of band.Control mode is as follows：Assuming that the unit interval lignite quality for entering into conveyer belt 6 from breaker is M, matter
Amount moisture content be W when, into drying device 17 admission line air themperature for T1, air mass flow be O, leave dry dress
17 outlet air temperature is put for T2, when the transfer rate of conveyer belt 6 is V, expression meets the drying effect of certain condition.
Above-mentioned unit interval lignite mass M, quality moisture content W, admission line air themperature T1, air mass flow O, outlet air temperature
T2, the transfer rate V of conveyer belt 6 are referred to as Reference mass, benchmark moisture content, benchmark admission line temperature, reference outlet temperature, base
Quasi- air mass flow, reference speed, i.e. reference data.Described reference data is stored in central controller 21.
Reference data represents the data of the drying effect for meeting certain condition.For example can be to meet certain drying to imitate
Really, such as drying effect is that lignite moisture content is 0.04%, or when certain drying effect is reached, the energy of consuming is most
It is few.Certainly preferred condition is when reaching certain drying effect, and the minimum data of the energy of consuming are used as reference data.
The temperature and speed adjusted by following formula also substantially disclosure satisfy that the certain condition that reference data is reached
Drying effect.
When unit interval lignite quality is that m, quality moisture content are w, flow o into the air of drying equipment,
Admission line air themperature t1, outlet air temperature t2 meet following three kinds of different operational modes with the transfer rate v of conveyer belt 6
One of：
First mode：The transfer rate v of conveyer belt 6 keeps reference speed V constant, and the flow o changes of air are as follows：
O* (t1-t2)=O* (T1-T2) * (w/W)a*(m/M)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 gradually increases with the increase of w/W, and b gradually increases with the increase of m/M
Plus.
Second mode：O keeps standard flow O constant, and the transfer rate v changes of conveyer belt 6 are as follows：
(V/v) * (t1-t2)=(T1-T2) * (w/W)c*(m/M)d, wherein c, d are parameter, 1.08<c<1.15,1.18<d<
1.22；Preferably, c=1.1, d=1.20；
3rd pattern：O and v are variable, and the relation of the transfer rate of air mass flow and conveyer belt 6 is as follows：
(V*o* (t1-t2))/(v*O* (T1-T2))=g* (w/W)e*(m/M)o, wherein g, e, o are parameter, and g meets as follows
Formula：
(V*o*(t1-t2))/(v*O*(T1-T2))>1,0.92<g<0.97；Preferably, g=0.95；
(V*o*(t1-t2))/(v*O*(T1-T2))<1,1.03<g<1.06；Preferably, g=1.05；
(V*o* (t1-t2))/(v*O* (T1-T2))=1,0.97<g<1.03；Preferably, g=1；
Preferably, the 3rd pattern chooses ((1-o/O)2+ (1-v/V)2) the minimum one group of o and v of value；Can certainly
Select first group of o and v of satisfaction requirement, it is also possible to one group is randomly choosed from the o and v that meet condition；
1.08<e<1.13,1.14<o<1.18；Preferably, e=1.10, o=1.16.
Wherein need to meet following condition in the formula of above-mentioned Three models：0.9<o/O<1.1,0.9<v/V<1.1.
Above-mentioned formula is by substantial amounts of actual verification, the need for fully meeting lignite actual drying.
In actual applications, multigroup reference data is stored in central controller 21, then central controller 21 is according to user
The data (the lignite quantity and lignite moisture content of unit interval) of input, are meeting 0.9<s/S<1.1,0.9<l/L<1.1 situations
Under, suitable reference data is being automatically selected as foundation.
Preferably, in the case of there is two groups or multigroup reference data, the reference data of user's selection can be provided
Interface, preferred, system can be automatically selected ((1-o/O)2+ (1-v/V)2) minimum one of value.
The Three models can only store one kind in central controller 21, it is also possible to store two kinds or three kinds in
In the controller 21 of centre.
In formula above, t1, t2 are obtained by temperature sensor real-time detection, by outlet temperature sensor 14, are entered
Feed channel temperature sensor 22 is obtained；And quality moisture content be w by way of detecting be manually entered in advance, and lignite quality is
M can in advance set transfer rate by way of setting be manually entered in advance, then be manually entered into central controller
21, it is also possible to by the automatic detection of central controller 21, central controller be transferred on conveyer belt in breaker 2 by being detected
The speed of lignite calculate the quality of lignite.Now central controller 21 detects the transfer rate of conveyer belt 6.
Preferably, when being adjusted to air mass flow, the power of fan of all of dry section 4 takes identical to increase
Width or the range of decrease, for example, all increase by 10% simultaneously.
Preferably, when being adjusted to air mass flow, the power of fan of all of dry section 4 takes 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 is increased or decreased gradually is reduced, example
Such as, along the direction of transfer of conveyer belt 6, power of fan above increases by 15%, increase by 12% successively below, 11%, etc..
In formula above, air mass flow is the air total flow into drying equipment.Preferably, described flow inspection
Device 23 is surveyed to be arranged on admission line house steward.
The invention also discloses a kind of method for realizing drying equipment intelligent operation, comprise the following steps：
1) one group or multigroup reference data are stored in central controller 21 first：Unit interval lignite quality is M, matter
Amount moisture content is W, admission line air themperature T1, air mass flow are O, outlet air temperature T2, the transfer rate V of conveyer belt 6；
2) lignite unit mass and water content are input into operation interface；Certainly, unit interval lignite quality can pass through
The automatic detection of central controller 21；
3) central controller 21 according to input lignite unit mass and water content, user selection perform or hold automatically
A kind of one of row (such as in the case of there was only operational mode) three below pattern：
First mode：The transfer rate v of conveyer belt 6 keeps reference speed V constant, and the flow o changes of air are as follows：
O* (t1-t2)=O* (T1-T2) * (w/W)a*(m/M)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：O keeps standard flow O constant, and the transfer rate v changes of conveyer belt 6 are as follows：
(V/v) * (t1-t2)=(T1-T2) * (w/W)c*(m/M)d, wherein c, d are parameter, 1.08<c<1.15,1.18<d<
1.22；Preferably, c=1.1, d=1.20
3rd pattern：O and v are variable, and the relation of the transfer rate of air mass flow and conveyer belt 6 is as follows：
(V*o* (t1-t2))/(v*O* (T1-T2))=g* (w/W)e*(m/M)o, wherein g, e, o are parameter, and g meets as follows
Formula：
(V*o*(t1-t2))/(v*O*(T1-T2))>1,0.92<g<0.97；Preferably, g=0.95；
(V*o*(t1-t2))/(v*O*(T1-T2))<1,1.03<g<1.06；Preferably, g=1.05；
(V*o* (t1-t2))/(v*O* (T1-T2))=1,0.97<g<1.03；Preferably, g=1；
Preferably, the 3rd pattern chooses ((1-o/O)2+ (1-v/V)2) the minimum one group of o and v of value；Can certainly
Select first group of o and v of satisfaction requirement, it is also possible to select one group immediately from the o and v that meet condition；
1.08<e<1.13,1.14<o<1.18；Preferably, e=1.10, o=1.16.
Wherein need to meet following condition in the formula of above-mentioned Three models：0.9<o/O<1.1,0.9<v/V<1.1.
4) drying device 17 proceeds by drying operation.
Preferably, step 1) the middle multigroup reference data of input；
Preferably, in the case of there is two groups or multigroup reference data, what user can be selected by user interface
Reference data.
In actual applications, multigroup reference data is stored in central controller 21, then central controller 21 is according to user
The data (unit interval lignite quality and lignite moisture content) of input, are meeting 0.9<s/S<1.1,0.9<l/L<In the case of 1.1,
Suitable reference data is being automatically selected as foundation.
Preferably, in the case of there is two groups or multigroup reference data, the reference data of user's selection can be provided
Interface, preferred, system can be automatically selected ((1-o/O)2+ (1-v/V)2) minimum one of value.
Preferably, enter heat utilization device 18 from the hot-air out of drying device 17, so as to carry out UTILIZATION OF VESIDUAL HEAT IN.Enter
Preferably, the heat utilization device 18 is boiler to one step, and it is combustion-supporting to carry out that the hot-air is directly entered boiler.
Preferably, described heat utilization device 18 is hot water storage tank.
Preferably, the air direct circulation out of heat utilization device 18 is into being heated in heat collector 15.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.
Claims (5)
1. a kind of solar energy brown coal drying system, including solar thermal collector and drying device, air are entered too by air-introduced machine
Positive energy heat collector, and the heat of solar energy is absorbed in solar thermal collector, form hot-air, guiding of the hot-air in blower fan
Lower entrance drying device, is dried to lignite；
The hot-air enters drying device by admission line, and temperature sensor and flow sensing are set on the admission line
Device, the temperature sensor is used to measure the air themperature for entering drying device, and the flow sensor is done for detection
The hot air flowrate of dry device；The temperature sensor and flow sensor carry out data cube computation with central controller；
The central controller automatically controls the power of blower fan according to the air themperature of the entrance drying device of measurement；
If the hot air temperature of the entrance drying device of central controller measurement declines, central controller increases blower fan automatically
Power；If the air themperature of the entrance drying device of central controller measurement rises, central controller reduces wind automatically
The power of machine；
A hot-air part for solar thermal collector heating enters drying device by main channel, and a part is entered by bypass channel
Enter heat utilization device, the first blower fan is set on main channel, the second blower fan is set on bypass channel, by the first blower fan, the second wind
The change of the power of machine changes the hot air flowrate for entering drying device and heat utilization device；
If the hot air temperature of the entrance drying device of central controller measurement declines, central controller increases by first automatically
The power of blower fan, while reducing the power of the second blower fan；If the hot-air temperature of the entrance drying device of central controller measurement
Degree rises, then central controller reduces the power of the first blower fan automatically, while increasing the power of the second blower fan；
When measurement temperature is the first temperature, blower fan is blown with the first power；Fallen below than first at a temperature of measurement
During the low second temperature of temperature, blower fan is blown with the second power higher than the first power；Fallen below at a temperature of measurement
During lower than second temperature three temperature, blower fan is blown with the 3rd power higher than the second power；At a temperature of measurement
When falling below four temperature lower than the 3rd temperature, blower fan is blown with the 4th power higher than the 3rd power；When measurement
At a temperature of when falling below five temperature lower than the 4th temperature, blower fan is blown with the 5th power higher than the 4th power；
The drying device includes casing, conveyer belt, and the conveyer belt passes through casing, and the hot-air is from the bottom of drying device
Into drying device, then pass through conveyer belt to dry the lignite conveyed on conveyer belt, finally discharged from the outlet of drying device,
So as to complete the drying to lignite；
Along conveyer belt direction of transfer, the distribution of hot air flowrate is gradually reduced in drying device, if that is, by flow V be set to away from
From the function of dry section entrance distance x, V=O (x), then in dry section, O'(x)<0, wherein O'(x) it is once leading for O (x)
Number；
O”(x)<0, O " (x) is the second derivative of O (x).
2. solar energy brown coal drying system as claimed in claim 1, it is characterised in that the 5th temperature is less than the 4th temperature 3-5
Degree Celsius, the 4th temperature is less than the 3rd 3-5 degrees Celsius of temperature, and the 3rd temperature is less than 3-5 degrees Celsius of second temperature, and second temperature is small
In 3-5 degrees Celsius of the first temperature.
3. solar energy brown coal drying system as claimed in claim 2, it is characterised in that the 5th temperature is less than the 4th temperature 4.5-
5 degrees Celsius, the 4th temperature is less than the 3rd 4-4.5 degrees Celsius of temperature, and the 3rd temperature is less than 3.5-4 degrees Celsius of second temperature, second
Temperature is less than 3-3.5 degrees Celsius of the first temperature.
4. solar energy brown coal drying system as claimed in claim 1, it is characterised in that the 5th power is the 4th power
1.08-1.28 times, the 4th power is 1.08-1.28 times of the 3rd power, and the 3rd power is 1.08-1.28 times of the second power,
Second power is 1.08-1.28 times of the first power.
5. solar energy brown coal drying system as claimed in claim 4, it is characterised in that the 5th power is the 4th power
1.28-1.23 times, the 4th power is 1.23-1.19 times of the 3rd power, and the 3rd power is 1.19-1.12 times of the second power,
Second power is 1.12-1.08 times of the first power.
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| CN109497604A (en) * | 2018-12-04 | 2019-03-22 | 云南中烟工业有限责任公司 | A kind of Two-Dimensional Heat tobacco shreds drying device and drying means |
| CN110673011A (en) * | 2019-10-31 | 2020-01-10 | 苏州通富超威半导体有限公司 | Semiconductor testing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900139A (en) * | 1997-03-14 | 1999-05-04 | Maschinenfabrik J. Dieffenbacher Gmbh & Co. | Filter press for reducing the water content of solid materials and/or sludges |
| DE10143663A1 (en) * | 2001-09-06 | 2003-04-24 | Rwe Rheinbraun Ag | Device for preparing dry brown coal comprises oscillating conveying groove having receiving end, removal end and base with individual air-permeable stages having intermediate chambers arranged between stages |
| CN101907383A (en) * | 2010-08-10 | 2010-12-08 | 浙江大学 | Belt-conveying drying system and method for realizing dehydration upgrading of lignite by using solar energy |
| CN203534075U (en) * | 2013-06-14 | 2014-04-09 | 中国矿业大学(北京) | Collector-greenhouse type solar energy lignite drying and upgrading device |
| CN203534101U (en) * | 2013-06-14 | 2014-04-09 | 中国矿业大学(北京) | Continuous feeding solar drying and upgrading system for brown coal |
| CN103773544A (en) * | 2014-01-20 | 2014-05-07 | 中国矿业大学 | Pulse fluidization-based integrated de-ashing and dehydrating method and equipment of brown coal |
| CN105387686A (en) * | 2015-12-18 | 2016-03-09 | 华北电力大学（保定） | Multi-mode solar-energy drying method and system for brown coal |
-
2016
- 2016-09-22 CN CN201610841439.6A patent/CN106322965B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900139A (en) * | 1997-03-14 | 1999-05-04 | Maschinenfabrik J. Dieffenbacher Gmbh & Co. | Filter press for reducing the water content of solid materials and/or sludges |
| DE10143663A1 (en) * | 2001-09-06 | 2003-04-24 | Rwe Rheinbraun Ag | Device for preparing dry brown coal comprises oscillating conveying groove having receiving end, removal end and base with individual air-permeable stages having intermediate chambers arranged between stages |
| CN101907383A (en) * | 2010-08-10 | 2010-12-08 | 浙江大学 | Belt-conveying drying system and method for realizing dehydration upgrading of lignite by using solar energy |
| CN203534075U (en) * | 2013-06-14 | 2014-04-09 | 中国矿业大学(北京) | Collector-greenhouse type solar energy lignite drying and upgrading device |
| CN203534101U (en) * | 2013-06-14 | 2014-04-09 | 中国矿业大学(北京) | Continuous feeding solar drying and upgrading system for brown coal |
| CN103773544A (en) * | 2014-01-20 | 2014-05-07 | 中国矿业大学 | Pulse fluidization-based integrated de-ashing and dehydrating method and equipment of brown coal |
| CN105387686A (en) * | 2015-12-18 | 2016-03-09 | 华北电力大学（保定） | Multi-mode solar-energy drying method and system for brown coal |
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