CN102706112A - Drying device and drying method for preventing coal from regaining moisture - Google Patents
Drying device and drying method for preventing coal from regaining moisture Download PDFInfo
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- CN102706112A CN102706112A CN2012101476529A CN201210147652A CN102706112A CN 102706112 A CN102706112 A CN 102706112A CN 2012101476529 A CN2012101476529 A CN 2012101476529A CN 201210147652 A CN201210147652 A CN 201210147652A CN 102706112 A CN102706112 A CN 102706112A
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Abstract
The invention discloses a drying device and a drying method for preventing coal from regaining moisture. The drying device comprises a heating furnace composed of a furnace door, a fire chamber, a flue and a smoke exhaust port and a revolving drum drier composed of a smoke inlet channel, a revolving drum and a smoke outlet channel. The heating furnace is communicated with the revolving drum drier. The smoke outlet channel is connected with a draught fan, a discharging port is arranged at the bottom of the smoke outlet channel, and a feeding port is arranged on the top of the smoke inlet channel. The drying device is characterized in that an oxygen detecting device and a temperature detecting device are arranged at the position of the smoke exhaust port, a smoke inlet is arranged on the top of the flue, and opening and closing of the smoke inlet can be controlled. The drying device further comprises a feeding machine, a smoke inflation tank and a controller. The drying method is that when a value of the temperature detecting device is smaller than 800 DEG C, the controller controls the feeding machine to add fuel into the fire chamber through a conveyor belt till the temperature rises above 800 DEG C. When a value of the oxygen detecting device is larger than 3v%, the controller controls the smoke inflation tank to inflate smoke into the drying device through the smoke inlet till oxygen content reaches 3v%. Coal products hard to regain moisture can be obtained after being dried through the oxygen-lacking high-temperature smoke.
Description
Technical field
The present invention relates to a kind of drying device and method that prevents the coal moisture regain, belong to the coal process field.
Background technology
Contain a large amount of impurity in the colliery of new exploitation, can not directly use.After washing was handled, spoil, troilite in the colliery were removed, and ash content also reduces; But still contain very high moisture in the coal, the existence of moisture can reduce the burning of coal calorific value greatly, finds after deliberation; The coal combustion calorific value that contains 27.8wt% moisture is 73KJ/kg, and the moisture in coal reduces a half, and the burning of coal calorific value has improved nearly ten times; Therefore to obtain the coal of high combustion calorific value, just need carry out dried coal.
In the prior art; Usually adopt heating system that coal is carried out dried, the thermal medium that in said heating system, uses has steam, conduction oil or flue gas etc., but preceding two kinds of thermal mediums are very high to the sealing requirements of MEDIA FLOW circulation passage; And the corrosivity to drying equipment is strong; Increased the cost of industrial operation greatly, and when utilizing hot flue gas that material is carried out drying, do not had requirement MEDIA FLOW circulation passage sealing; And lower to corrosion on Equipment property, thereby hot flue gas is more commonly used than other several kinds of thermal mediums.CN101377379A discloses a kind of coal ash drying device like the Chinese patent document; Comprise revolver drier and heat supply pipeline; The hot gas approach of heat supply pipeline is provided with air register; Heat supply pipeline is provided with air blast, and the feeding pipe that is connected with revolver drier is provided with air-introduced machine, is provided with cyclone separator at the end of feeding pipe; On heat supply pipeline, be connected with auxiliary oven; Hot gas approach one end at heat supply pipeline is provided with hot gas approach temperature sensor and cigarette measuring device, and the hot gas approach of revolver drier is provided with the revolver drier inlet temperature sensor on heat supply pipeline, and the outlet of revolver drier is provided with the revolver drier outlet temperature sensor on feeding pipe.In the above-mentioned technology coal dust is placed revolver drier; Utilization is carried out drying by the hot flue gas of heat supply pipeline input to coal dust; But adopt the resulting dry coal dust of this method to be placed in the external environment very easily because of absorbing the airborne water phenomenon that gets damp again; The burning of coal calorific value is reduced, and the water absorption of coal dust also can change along with the variation of ambient humidity, there are differences with regard to the quality of pc that causes different batches to be produced like this; Quality of pc is unstable, for difficulty has been made in the further utilization of coal.
In order to solve the problem of coal moisture regain; Having the researcher to propose that hydrophobicity is carried out on the surface of coal handles; A kind of method that prevents the moisture regain of living beings carbon source moulded coal is disclosed like Chinese patent document CN201110053240.4; This method is that living beings carbon source moulded coal is prevented the moisture regain processing after moulding; It is at normal temperatures with evenly spraying the anti-protective layer that gets damp again with the damp-proof layer spray equipment on the outer surface of the living beings carbon source moulded coal after the moulding that said anti-moisture regain is handled, and resulting living beings carbon source moulded coal has stronger water proofing property.
In the prior art, solve the problem of coal moisture regain, all need carry out such as the coal surface modification in the above-mentioned technology, promptly adopt to make the method that hydrophobic agents is being covered on the coal surface make the coal surface become hydrophobicity by hydrophily to the coal surface; Though the living beings carbon source moulded coal that has anti-moisture regain protective layer that above-mentioned technology obtains has water proofing property; But living beings carbon source moulded coal is when burning; Anti-moisture regain protective layer can be met thermal decomposition; Because this protective layer is that chemicals is processed, the chemical substance that is produced after decomposing can work the mischief to environment and human beings'health; And after coal carried out forming processes, also need increase the processing step of the anti-moisture regain of a spraying protective layer, this itself has just increased the complexity of technology, has not only reduced production efficiency, and has increased production cost.
It is emphasized that coal is a porous material, not only the surface of coal can adsorption moisture, and the inside of coal also can adsorption moisture, and the adhesion of internal moisture and coal is stronger; Therefore when coal carries out drying, come out if want the water evaporates that coal is inner, need higher energy, and coal is when suction, moisture also gets into the inside of coal more easily.
Summary of the invention
Though being the coal that has anti-moisture regain protective layer in the prior art, technical problem to be solved by this invention has water proofing property; But coal is when burning, and anti-moisture regain protective layer can be met thermal decomposition, because this protective layer is that chemicals is processed; The chemical substance that is produced after decomposing can work the mischief to environment and human beings'health; And after coal carried out forming processes, also need increase the processing step of the anti-moisture regain of a spraying protective layer, this itself has just increased the complexity of technology; Not only reduce production efficiency, and increased production cost; And then a kind of drying device and the method that prevent the coal moisture regain of simple, environmental protection proposed.
For solving the problems of the technologies described above, the invention provides a kind of drying device that prevents the coal moisture regain, comprising: heating furnace, said heating furnace comprises body of heater, is arranged on fire door and exhaust opening on the said body of heater; In said body of heater set inside fiery chamber is arranged, said fiery chamber communicates with said exhaust opening through flue; Revolving drier, said revolving drier comprise rotating cylinder and be arranged on the flue and the smoke outlet flue at said rotating cylinder two ends, and said heating furnace is connected with said revolving drier through said exhaust opening, and said smoke outlet flue is connected with air-introduced machine; Top at said flue is provided with charge door, is provided with discharging opening in the bottom of said smoke outlet flue; Said exhaust opening place is provided with the Temperature Detector that is used for detecting the oxygen detection device of flue gas oxygen content and is used to detect flue-gas temperature; Said flue top is provided with the air inlet that can control keying.
Also comprise batcher, said batcher is provided with conveyer belt; Along the transmission direction of said conveyer belt, the end of said conveyer belt is positioned at and the contacted position of said fire door, is used for adding fuel to said fiery chamber; When the numerical value of said Temperature Detector during less than 800 ℃, said fire door and batcher are opening.
Being tightly connected with said air inlet is provided with gasing tank, and the body of inflating is nitrogen or inert gas, and when the numerical value of said oxygen detection device during greater than 3v%, said air inlet and gasing tank are opening.
Also comprise controller, in said controller set inside temperature threshold and oxygen content threshold value are arranged, said temperature threshold is 800 ℃, and said oxygen content threshold value is 3v%; Said controller is connected with said gasing tank, air inlet, batcher, fire door respectively, and said controller also is connected with said oxygen detection device with said Temperature Detector; The furnace wall that said oxygen detection device and Temperature Detector run through said flue is provided with.
In said rotating cylinder, be connected with lifting blade with the inwall of said rotating cylinder.
In said flue, be provided with the first retaining flame board and the second retaining flame board that are parallel to each other, the upper end of the said first retaining flame board is connected with the inwall of said body of heater, and the lower end of the said second retaining flame board is connected with the inwall of said body of heater; Along said flue axially, has between the said first retaining flame board and the second retaining flame board and is suitable for the passage that flue gas circulates; Perpendicular to said flue axially, the said first retaining flame board and second keeps off flame board and has interlaced area.
Described drying device prevents that the drying means of coal moisture regain from being to be less than or equal under the environment of 3v% more than or equal to 800 ℃, oxygen content in flue-gas temperature, carries out dried to coal.
Described drying means may further comprise the steps:
(1) chamber that kindles a fire adds coal to be dried in the revolving drier by charge door, and under the effect of air-introduced machine, hot flow of flue gas is carried out drying to coal in said revolving drier, and in dry run, said revolving drier drives its inner coal and rotates;
(2) use the oxygen detection device to detect the oxygen content in the exhaust opening place flue gas; When detected said oxygen content during greater than 3v%; Open gasing tank and air inlet; Said gasing tank feeds nitrogen or inert gas by said air inlet in said revolving drier, when detected said oxygen content is equal to or less than 3v%, close said gasing tank and air inlet;
The serviceability temperature detector detects the flue-gas temperature at said exhaust opening place; When detected said flue-gas temperature during less than 800 ℃; Fire door and batcher are opened in control; Said batcher adds fuel through conveyer belt in said fiery chamber, when detected said flue-gas temperature was equal to or greater than 800 ℃, said fire door and batcher were closed in control;
(3) discharge, collect by discharging opening through dried coal.
Said oxygen detection device transfers to controller with detected said oxygen content data; Said controller is transferred the oxygen content threshold value and is compared; When detected said oxygen content during greater than said oxygen content threshold value; Said gasing tank and air inlet are opened in said controller control; Said gasing tank feeds nitrogen or inert gas by said air inlet in said revolving drier, when detected said oxygen content was equal to or less than said oxygen content threshold value, said gasing tank and air inlet were closed in said controller control;
Said Temperature Detector is with detected said flue-gas temperature transfer of data to said controller; Said controller is transferred temperature threshold and is compared; When detected said flue-gas temperature during less than said temperature threshold; Said fire door and batcher are opened in said controller control, and said batcher adds fuel through said conveyer belt in said fiery chamber, when detected said flue-gas temperature is equal to or greater than said temperature threshold; Said fire door and batcher are closed in said controller control, stop to add fuel.
The rotating speed of rotating cylinder is 2-8r/min, in said revolving drier rotation process, utilizes the lifting blade that is arranged on said revolving drier inside that coal is evenly disperseed.
The present invention compares with the prior art scheme has following beneficial effect:
(1) drying device that prevents the coal moisture regain according to the invention comprises heating furnace, and said heating furnace comprises body of heater, is arranged on fire door and exhaust opening on the said body of heater; In said body of heater set inside fiery chamber is arranged, said fiery chamber communicates with said exhaust opening through flue; Revolving drier, said revolving drier comprise rotating cylinder and be arranged on the flue and the smoke outlet flue at said rotating cylinder two ends, and said heating furnace is connected with said revolving drier through said exhaust opening, and said smoke outlet flue is connected with air-introduced machine; Top at said flue is provided with charge door, is provided with discharging opening in the bottom of said smoke outlet flue; Said exhaust opening place is provided with the Temperature Detector that is used for detecting the oxygen detection device of flue gas oxygen content and is used to detect flue-gas temperature; Said flue top is provided with the air inlet that can control keying.
The present invention carries out dried with above-mentioned drying device to coal; Thereby the method that is prevented the coal of moisture regain is the chamber that kindles a fire; Coal to be dried is added in the revolving drier by charge door, and under the effect of air-introduced machine, hot flow of flue gas is carried out drying to coal in said revolving drier; In dry run, revolving drier drives its inner coal and rotates; In dry run; Use the oxygen detection device to detect the oxygen content in the exhaust opening place flue gas; When detected oxygen content during greater than 3v%, open air inlet, in said revolving drier, feed nitrogen or inert gas by said air inlet; When detected oxygen content is equal to or less than 3v%, close said air inlet; Simultaneously, the serviceability temperature detector detects the flue-gas temperature at exhaust opening place, when detected flue-gas temperature during less than 800 ℃; Said fire door is opened in control; In said fiery chamber, add fuel, when detected flue-gas temperature was equal to or greater than 800 ℃, said fire door was closed in control; Discharge, collect by discharging opening through dried coal.Like this; The Temperature Detector that is provided with through the exhaust opening place and oxygen detection device detect the temperature and the oxygen content of the hot flue gas of entering revolving drier; The temperature that can keep hot flue gas more than 800 ℃ and oxygen content below 3v%, after coal to be dried fully contacted in this oxygen deprivation high-temperature flue gas and the revolving drier, not only the moisture of coal particle surface was evaporated; And the micropore of coal particle surface is opened under the effect of this oxygen deprivation high-temperature flue gas; The inner moisture of coal particle also is evaporated out, and hot-air is filled the inside that gets into coal particle simultaneously, when coal is discharged revolving drier by discharging opening; Take place closed or shrink because of shock chilling function makes micropore moment of coal particle surface, forming inside is the coal particle of airbag structure; When this coal is positioned over wet environment; Because reduce because of closed or contraction in the duct of coal particle surface; Thereby the coal surface is to the absorption affinity decline of water, again because coal particle inside is airbag structure, so water is difficult for getting into coal particle inside; The water absorption of coal is significantly reduced, and dried coal is difficult for moisture regain; Avoided carrying out waterproof through spraying hydrophobic agents on the coal surface in the prior art, hydrophobic agents is met thermal decomposition when coal combustion, decompose the chemical substance that produces and can endanger environment and human health, and the operation of spraying has increased the problem of complex procedures property.
(2) drying device that prevents the coal moisture regain according to the invention also comprises batcher, and said batcher is provided with conveyer belt; Along the transmission direction of said conveyer belt, the end of said conveyer belt is positioned at and the contacted position of said fire door, is used for adding fuel to said fiery chamber; When the numerical value of said Temperature Detector during less than 800 ℃, said fire door and batcher are opening.The temperature that detects flue gas when Temperature Detector is opened fire door and batcher during less than 800 ℃, and batcher warms oneself in front of a fire through conveyer belt and adds fuel in the chamber; When Temperature Detector detects flue-gas temperature and is equal to or greater than 800 ℃, close fire door and batcher, stop to feed in raw material; So both guaranteed the temperature of hot flue gas accurately is controlled at more than 800 ℃; Limited the circulation of inner air and outer air again, thereby made flame can not receive the influence of external environment, the flue gas of drying device keeps the state of oxygen deprivation; And mode safety, the convenience of mechanical refuelling, help industrial applications.
(3) drying device that prevents coal moisture regain according to the invention, being tightly connected with said air inlet is provided with gasing tank, and when the numerical value of said oxygen detection device during greater than 3v%, said air inlet and gasing tank are opening.When the oxygen detection device detects oxygen content in the exhaust opening place flue gas greater than 3v%, open air inlet and gasing tank, gasing tank charges into nitrogen or inert gas by air inlet in revolving drier; With the oxygen in the dilution flue gas; The oxygen content that detects in the flue gas until the oxygen detection device is equal to or less than 3v%, closes air inlet and gasing tank, stops inflation; Can the oxygen content in the flue gas accurately be controlled at below the 3v% like this, keep the oxygen deprivation state of flue gas.
(4) in the drying device that prevents coal moisture regain according to the invention, also comprise controller, in said controller set inside temperature threshold and oxygen content threshold value are arranged, said temperature threshold is 800 ℃, and said oxygen content threshold value is 3v%; Said controller is connected with said gasing tank, air inlet, batcher, fire door respectively, and said controller also is connected with said oxygen detection device with said Temperature Detector; The furnace wall that said oxygen detection device and Temperature Detector run through said flue is provided with.Said oxygen detection device transfers to controller with detected oxygen content data; Said controller is transferred the oxygen content threshold value and is compared; When detected oxygen content during greater than 3v%, said gasing tank and air inlet are opened in said controller control, and said gasing tank feeds nitrogen or inert gas by said air inlet in said revolving drier; When detected oxygen content was equal to or less than 3v%, said gasing tank and air inlet were closed in said controller control; Said Temperature Detector is with detected flue-gas temperature transfer of data to said controller; Said controller is transferred temperature threshold and is compared, and when detected temperature during less than 800 ℃, said fire door and batcher are opened in said controller control; Said batcher adds fuel through said conveyer belt in said fiery chamber; When detected flue-gas temperature was equal to or greater than 800 ℃, said fire door and batcher were closed in said controller control, stop to add fuel.So just avoid the inaccuracy of Artificial Control flue-gas temperature and oxygen content, made things convenient for practical operation.
(5) in the drying device that prevents coal moisture regain according to the invention, in said rotating cylinder, be connected with lifting blade with the inwall of said rotating cylinder.The set lifting blade of the present invention can be dished out downwards, through coal is constantly raised, dished out with the ribbing in the revolving drier to certain altitude then; Increased the contact area of coal and hot flue gas, improved the rate of drying of hot flue gas, in addition coal; Hot flue gas contacts with coal fully; Also help the inner water of coal particle to be evaporated, forming inside is the coal particle of airbag structure, thereby guarantees that dried coal is not easy moisture regain.
(6) drying device that prevents the coal moisture regain according to the invention; In said flue, be provided with the first retaining flame board and the second retaining flame board that are parallel to each other; The upper end of the said first retaining flame board is connected with the inwall of said body of heater, and the lower end of the said second retaining flame board is connected with the inwall of said body of heater; Along said flue axially, has between the said first retaining flame board and the second retaining flame board and is suitable for the passage that flue gas circulates; Perpendicular to said flue axially, the said first retaining flame board and second keeps off flame board and has interlaced area.Through the first retaining flame board and the second retaining flame board are set, prevented that the flame in the fiery chamber from scurrying in the revolving drier under the drive of air-introduced machine, cause the coal combustion in the drier, even cause the problem that drier is blasted.
(7) in the drying means that prevents coal moisture regain according to the invention, the rotating speed of revolving drier is 2-8r/min.The rotating speed of the present invention through setting revolving drier can guarantee that coal fully contacts with hot flue gas within the specific limits, and the too fast or mistake of rotating speed all is unfavorable for coal and the abundant contact heat-exchanging of hot flue gas slowly.
Description of drawings
For content of the present invention is understood more easily, the present invention combines the accompanying drawing and the specific embodiment that content of the present invention is further explained;
Fig. 1 is the structural representation that prevents coal moisture regain drying device according to the invention;
Fig. 2 is the structural representation that prevents coal moisture regain drying device that has batcher according to the invention;
Fig. 3 is the structural representation that prevents coal moisture regain drying device that has gasing tank and batcher according to the invention;
Fig. 4 is the structural representation that prevents coal moisture regain drying device that has controller, batcher and gasing tank according to the invention;
Fig. 5 is the structural representation that prevents coal moisture regain drying device that has controller, batcher, gasing tank and lifting blade according to the invention;
Fig. 6 is the structural representation that prevents coal moisture regain drying device that has controller, batcher, gasing tank, lifting blade, the first retaining flame board and the second retaining flame board according to the invention;
Wherein Reference numeral is: 1-body of heater, 2-fire door, 3-fire chamber, 4-exhaust opening, 5-revolving drier, 6-flue; The 7-rotating cylinder, 8-smoke outlet flue, 9-lifting blade, 10-charge door, 11-discharging opening; The 12-air-introduced machine, 13-oxygen detection device, 14-Temperature Detector, 15-air inlet, the 16-first retaining flame board; The 17-gasing tank, 18-batcher, 19-controller, the 20-second retaining flame board, 21-conveyer belt.
The specific embodiment
Using the drying device that prevents coal moisture regain according to the invention that coal is carried out dry method is to be equal to or greater than 800 ℃, oxygen content in hot flue-gas temperature to be less than or equal under the environment of 3v%, and coal is carried out dried.
Of the present inventionly prevent that the drying device of coal moisture regain is as shown in Figure 1; Comprise heating furnace, said heating furnace comprises body of heater 1, is arranged on fire door 2 and exhaust opening 4 on the said body of heater 1; In the present embodiment; Said fire door 2 is arranged on an end of said body of heater 1, and correspondingly, said exhaust opening 4 is arranged on the other end of said body of heater 1; In said body of heater 1 set inside fiery chamber 3 is arranged, said fiery chamber 3 communicates with said exhaust opening 4 through flue, and in the present embodiment, fiery chamber 3 is arranged on body of heater 1 inside near said fire door 2 one ends, and said flue is arranged on body of heater 1 inside near said exhaust opening 4 one ends; Revolving drier 5, said revolving drier 5 comprise rotating cylinder 7 and be arranged on the flue 6 and smoke outlet flue 8 at said rotating cylinder 7 two ends, and the rotating speed of said rotating cylinder 7 can be selected arbitrarily as required, and in the present embodiment, the rotating speed of said rotating cylinder 7 is 2-8r/min; Said heating furnace is connected with said revolving drier 5 through said exhaust opening 4, and said smoke outlet flue 8 is connected with air-introduced machine 12, and in the present embodiment, said flue 6 is nonrotational structure with smoke outlet flue 8, and said rotating cylinder 7 is around axial rotation; Be provided with charge door 10 at the top of said flue 6, be provided with discharging opening 11 in the bottom of said smoke outlet flue 8; Said exhaust opening 4 places are provided with the Temperature Detector 14 that is used for detecting the oxygen detection device 13 of flue gas oxygen content and is used to detect flue-gas temperature; Said flue top is provided with the air inlet 15 that can control keying.
The above-mentioned drying device that prevents coal moisture regain in use; Chamber 3 at first kindles a fire; Then coal to be dried is added in the revolving drier 5 by charge door 10, under the effect of air-introduced machine 12, hot flow of flue gas is carried out drying to coal in said revolving drier 5; In dry run, revolving drier 5 drives its inner coal and rotates; In dry run; The oxygen content that uses oxygen detection device 13 to detect in exhaust opening 4 place's flue gases, when detected oxygen content showed greater than 3v%, air inlet 15 was opened in manual work; In said revolving drier 5, feed nitrogen or inert gas by said air inlet 15; When detected oxygen content was equal to or less than 3v%, said air inlet 15 was closed in manual work, stops air inlet; Simultaneously; Serviceability temperature detector 14 detects the flue-gas temperature at exhaust openings 4 places, when detected flue-gas temperature during less than 800 ℃, artificially opens said fire door 2; In said fiery chamber 3, add fuel; When detected flue-gas temperature was equal to or greater than 800 ℃, said fire door 2 was closed in manual work, stops refuelling; Discharge, collect by discharging opening 11 through dried coal.
On this basis; In order accurately to control the fuel quantity that adds in the fiery chamber 3; Thereby the temperature of controlling hot flue gas remains on more than 800 ℃, makes reinforced operation safer, convenient, as shown in Figure 2 simultaneously; On the basis of the foregoing description, further be provided with batcher 18, said batcher 18 is provided with conveyer belt 21; Along the transmission direction of said conveyer belt 21, the end of said conveyer belt 21 is positioned at and said fire door 2 contacted positions, is used for adding fuel to said fiery chamber 3; When the numerical value of said Temperature Detector 14 during less than 800 ℃, said fire door 2 is an opening with batcher 18.In the present embodiment; When the numerical value of Temperature Detector 14 during less than 800 ℃; Artificial said fire door 2 and the batcher 18 opened warms oneself in front of a fire through batcher 18 then and adds fuel in the chamber 3, when the numerical value of Temperature Detector 14 is equal to or greater than 800 ℃; Said fire door 2 and batcher 18 are closed in manual work, stop refuelling.
On the basis of the above; For the oxygen content in the accurate hot flue gas of control below 3v%, with the oxygen deprivation state in the device that keeps dry, as shown in Figure 3; Be tightly connected with said air inlet 15 and be provided with gasing tank 17; The body of inflating is nitrogen or inert gas, and when the numerical value of said oxygen detection device 13 during greater than 3v%, said air inlet 15 is an opening with gasing tank 17.In the present embodiment; When the numerical value of said oxygen detection device 13 during greater than 3v%; Artificial said air inlet 15 and the gasing tank 17 opened is by gasing tank 17 inflated with nitrogen or inert gas in revolving drier 5, when the numerical value of said oxygen detection device 13 is less than or equal to 3v%; Air inlet 15 and gasing tank 17 are closed in manual work, stop inflation.
Gases in the said gasing tank 17 can also select according to circumstances that except that oxidisability gas other are any to keep homeostasis, the gas that can not react in hot flue gas and coal.
On this basis, as another embodiment, for the operation that can accurately control gasing tank 17 and batcher 18 with stop; High temperature oxygen deprivation state with hot flue gas in the device that keeps dry; Can reduce again simultaneously the use amount of the body of inflating and fuel, controller 19 further is set on the basis of the foregoing description, in said controller 19 set inside temperature threshold and oxygen content threshold value are arranged; Said temperature threshold is 800 ℃, and said oxygen content threshold value is 3v%; Said controller 19 is connected with said gasing tank 17, air inlet 15, batcher 18, fire door 2 respectively, and said controller 19 also is connected with said oxygen detection device 13 with said Temperature Detector 14; Said oxygen detection device 13 is provided with the furnace wall that Temperature Detector 14 runs through said flue; In the present embodiment; Said oxygen detection device 13 is provided with the top that Temperature Detector 14 runs through said flue, is connected thereby make said controller 19 and oxygen detection device 13 and Temperature Detector 14 be exposed to the outside part of said heating furnace, and then accurately controls oxygen detection device 13 and gasing tank 17, air inlet 15; The cooperating that Temperature Detector 14 and batcher 18, fire door are 2 is like Fig. 4.
The above-mentioned drying device that prevents coal moisture regain in use; Said oxygen detection device 13 transfers to controller 19 with detected oxygen content data; Said controller 19 is transferred the oxygen content threshold value and is compared; When detected oxygen content during greater than 3v%, said gasing tank 17 and air inlet 15 are opened in said controller 19 controls, and said gasing tank 17 feeds nitrogen or inert gas by said air inlet 15 in said revolving drier 5; When detected oxygen content was equal to or less than 3v%, said gasing tank 17 and air inlet 15 were closed in said controller 19 controls;
Said Temperature Detector 14 is with detected flue-gas temperature transfer of data to said controller 19; Said controller 19 is transferred temperature threshold and is compared, and when detected temperature during less than 800 ℃, said fire door 2 and batcher 18 are opened in said controller 19 controls; Said batcher 18 adds fuel through said conveyer belt 21 in said fiery chamber 3; When detected flue-gas temperature was equal to or greater than 800 ℃, said fire door 2 and batcher 18 were closed in said controller 19 controls, stop to add fuel.Discharge, collect by discharging opening 11 through dried coal.
Further,, coal dust contacts for can being mixed with the flue gas of high temperature oxygen deprivation state in the drying device fully, and as shown in Figure 5, in said rotating cylinder 7, be connected with lifting blade 9 with the inwall of said rotating cylinder 7; The shape of lifting blade 9 and arrangement mode can according to circumstances be selected arbitrarily, and in the present embodiment, said lifting blade 9 is arranged by an end to the other end of rotating cylinder 7 twist.
In addition; Scurry outward to revolving drier 5 in order to prevent the flame in the fiery chamber 3; In said flue, be provided with the first retaining flame board 16 and the second retaining flame board 20 that are parallel to each other; The upper end of the said first retaining flame board 16 is connected with the inwall of said body of heater 1, and the lower end of the said second retaining flame board 20 is connected with the inwall of said body of heater 1, and the upper end of the lower end of the said first retaining flame board 16 and the said second retaining flame board 20 is a free end; Along said flue axially, has between the said first retaining flame board 16 and the second retaining flame board 20 and is suitable for the passage that flue gas circulates; Perpendicular to said flue axially, the said first retaining flame board 16 and second keeps off flame board 20 and has interlaced area, like Fig. 6.
When using said apparatus, coal to be dried is added in the revolving driers 5 by charge door 10, and air-introduced machine 12 is introduced moisture-free coal in the revolving drier 5 with hot flue gas, and revolving drier 5 drives that coals rotate and through lifting blade 9 coal evenly disperseed simultaneously.The first retaining flame board 16 is separated in fiery chamber 3 with flame in whole dry run with the second retaining flame board 20, prevents that flame from scurrying in the revolving drier 5.
Though the present invention has carried out detailed elaboration through above-mentioned specific embodiment to it; But; Any form that does not exceed the claim protection domain that those skilled in the art should be understood that on this basis to be made and the variation of details all belong to invention which is intended to be protected.
Claims (10)
1. drying device that prevents coal moisture regain comprises:
Heating furnace, said heating furnace comprise body of heater (1), are arranged on fire door (2) and exhaust opening (4) on the said body of heater (1); In said body of heater (1) set inside fiery chamber (3) is arranged, said fiery chamber (3) communicates with said exhaust opening (4) through flue;
Revolving drier (5); Said revolving drier (5) comprises rotating cylinder (7); With flue (6) that is arranged on said rotating cylinder (7) two ends and smoke outlet flue (8), said heating furnace is connected with said revolving drier (5) through said exhaust opening (4), and said smoke outlet flue (8) is connected with air-introduced machine (12);
Be provided with charge door (10) at the top of said flue (6), be provided with discharging opening (11) in the bottom of said smoke outlet flue (8);
It is characterized in that,
Said exhaust opening (4) locates to be provided with the Temperature Detector (14) that is used for detecting the oxygen detection device (13) of flue gas oxygen content and is used to detect flue-gas temperature; Said flue top is provided with the air inlet (15) that can control keying.
2. drying device according to claim 1 is characterized in that, also comprises batcher (18), and said batcher (18) is provided with conveyer belt (21); Along the transmission direction of said conveyer belt (21), the end of said conveyer belt (21) is positioned at and the contacted position of said fire door (2), is used for adding fuel to said fiery chamber (3); When the numerical value of said Temperature Detector (14) during less than 800 ℃, said fire door (2) and batcher (18) are opening.
3. drying device according to claim 1 and 2; It is characterized in that; Be tightly connected with said air inlet (15) and be provided with gasing tank (17); The body of inflating is nitrogen or inert gas, and when the numerical value of said oxygen detection device (13) during greater than 3v%, said air inlet (15) is an opening with gasing tank (17).
4. drying device according to claim 3 is characterized in that, also comprises controller (19), in said controller (19) set inside temperature threshold and oxygen content threshold value is arranged, and said temperature threshold is 800 ℃, and said oxygen content threshold value is 3v%; Said controller (19) is connected with said gasing tank (17), air inlet (15), batcher (18), fire door (2) respectively, and said controller (19) also is connected with said oxygen detection device (13) with said Temperature Detector (14); Said oxygen detection device (13) is provided with the furnace wall that Temperature Detector (14) runs through said flue.
5. according to the arbitrary described drying device of claim 1-4, it is characterized in that, in said rotating cylinder (7), be connected with lifting blade (9) with the inwall of said rotating cylinder (7).
6. according to the arbitrary described drying device of claim 1-5; It is characterized in that; In said flue, be provided with the first retaining flame board (16) and the second retaining flame board (20) that are parallel to each other; The upper end of the said first retaining flame board (16) is connected with the inwall of said body of heater (1), and the lower end of the said second retaining flame board (20) is connected with the inwall of said body of heater (1); Along said flue axially, has between the said first retaining flame board (16) and the second retaining flame board (20) and is suitable for the passage that flue gas circulates; Perpendicular to said flue axially, the said first retaining flame board (16) has interlaced area with the second retaining flame board (20).
7. a drying means that uses the arbitrary described drying device of claim 1-6 to prevent coal moisture regain is characterized in that, is less than or equal under the environment of 3v% more than or equal to 800 ℃, oxygen content in flue-gas temperature, and coal is carried out dried.
8. drying means according to claim 7 may further comprise the steps:
(1) chamber (3) that kindles a fire; Coal to be dried is added in the revolving drier (5) by charge door (10), and under the effect of air-introduced machine (12), hot flow of flue gas is carried out drying to coal in said revolving drier (5); In dry run, said revolving drier (5) drives its inner coal and rotates;
(2) use oxygen detection device (13) to detect exhaust opening (4) and locate the oxygen content in the flue gas; When detected said oxygen content during greater than 3v%; Open gasing tank (17) and air inlet (15); Said gasing tank (17) feeds nitrogen or inert gas by said air inlet (15) in said revolving drier (5), when detected said oxygen content is equal to or less than 3v%, close said gasing tank (17) and air inlet (15);
Serviceability temperature detector (14) detects the flue-gas temperature that said exhaust opening (4) is located; When detected said flue-gas temperature during less than 800 ℃; Fire door (2) and batcher (18) are opened in control; Said batcher (18) adds fuel through conveyer belt (21) in said fiery chamber (3), when detected said flue-gas temperature was equal to or greater than 800 ℃, said fire door (2) and batcher (18) were closed in control;
(3) discharge, collect by discharging opening (11) through dried coal.
9. drying means according to claim 8; It is characterized in that; Said oxygen detection device (13) transfers to controller (19) with detected said oxygen content data; Said controller (19) is transferred the oxygen content threshold value and is compared; When detected said oxygen content during greater than said oxygen content threshold value, said gasing tank (17) and air inlet (15) are opened in said controller (19) control, and said gasing tank (17) feeds nitrogen or inert gas by said air inlet (15) in said revolving drier (5); When detected said oxygen content was equal to or less than said oxygen content threshold value, said gasing tank (17) and air inlet (15) were closed in said controller (19) control;
Said Temperature Detector (14) is with detected said flue-gas temperature transfer of data to said controller (19); Said controller (19) is transferred temperature threshold and is compared; When detected said flue-gas temperature during less than said temperature threshold; Said fire door (2) and batcher (18) are opened in said controller (19) control, and said batcher (18) adds fuel through said conveyer belt (21) in said fiery chamber (3), when detected said flue-gas temperature is equal to or greater than said temperature threshold; Said fire door (2) and batcher (18) are closed in said controller (19) control, stop to add fuel.
10. according to claim 7 or 8 or 9 described drying means; It is characterized in that; The rotating speed of rotating cylinder (7) is 2-8r/min, in said revolving drier (5) rotation process, utilizes the lifting blade (9) that is arranged on said revolving drier (5) inside that coal is evenly disperseed.
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| CN2012101476529A CN102706112A (en) | 2012-05-14 | 2012-05-14 | Drying device and drying method for preventing coal from regaining moisture |
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| CN2012101476529A CN102706112A (en) | 2012-05-14 | 2012-05-14 | Drying device and drying method for preventing coal from regaining moisture |
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| CN103611517A (en) * | 2013-12-13 | 2014-03-05 | 海南汉地阳光石油化工有限公司 | Hargil drying device and drying method |
| CN109248622A (en) * | 2018-09-21 | 2019-01-22 | 甘肃祖师麻制药有限公司 | Plaster refining equipment |
| CN109541121A (en) * | 2018-11-06 | 2019-03-29 | 山西大学 | The method that biomass combustion generates the device of flue gas and observes flue gas ageing process |
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| CN102168914A (en) * | 2010-12-30 | 2011-08-31 | 唐山天和科技开发有限公司 | Dryness detection device and method for brown coal |
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Application publication date: 20121003 |