CN102345974B - Drying and grading machine for processed object and drying and grading method - Google Patents
Drying and grading machine for processed object and drying and grading method Download PDFInfo
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- CN102345974B CN102345974B CN201110205311.8A CN201110205311A CN102345974B CN 102345974 B CN102345974 B CN 102345974B CN 201110205311 A CN201110205311 A CN 201110205311A CN 102345974 B CN102345974 B CN 102345974B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/30—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors
- F26B17/32—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotary or oscillating containers; with movement performed by rotary floors the movement being in a horizontal or slightly inclined plane
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
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- Mechanical Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention provides an efficient drying and grading machine for a processed object and a drying and grading method. The drying and grading machine comprises a rotary cylinder capable of freely rotating around the axis thereof. One end of the rotary cylinder is equipped with a feeding port for an object to be processed and a carrier gas and the other end of the rotary cylinder is equipped with a discharge port for the object to be processed and the carrier gas; a heating unit for heating and drying an object to be processed in the rotary cylinder during the delivery process of the object from the feeding port to the discharge port; a grading cover arranged to cover the other end side of the rotary cylinder. The lower part of the grading cover is equipped with a fixed discharge outlet for discharging the processed object and the upper part of the grading cover is equipped with a fixed gas outlet for discharging the gas carrier; and a dispersed gas blowing unit arranged inside the grading cover wherein the processed object is sent to the fixed discharge outlet.
Description
Technical field
The present invention relates to dry classification machine and the dry classification method of treated object being carried out to dry classification.Particularly when coal is as treated object, effect of the present invention can show significantly.
Background technology
In the manufacture of coke, due to the shortage of high-quality bonded carbon (strong bonded carbon and weak bonded carbon) and the surging of price thereof, the low coal of caking property is therefore used to manufacture widely.Although coal low for caking property can be carried out drying to use, when moisture becomes below 6.5%, the coal particulate of about below 100um can play dirt (Development Dust), thus cause the problems such as operating environment deterioration.And, when being supplied to coke oven by the coal particulate of about below 300um, carbon can be caused to be attached to problem in coke oven.Therefore, in order to address these problems, before the drying or after drying, utilize grading plant by particulate classification/removing from coal.
On the other hand, all the time, in the drying of coal, use horizontal rotary drying machine or fluid bed dryer, but the power consumption compared with fluid bed dryer of horizontal rotary drying machine is few, favourable at equipment cost this respect.
As the typical example of horizontal rotary drying machine in the past, known so-called steam-tube drier (STD).Using in the drying carried out of steam-tube drier, to improve for the purpose of drying efficiency etc., one situation is blown into carrier gas (for example, referring to patent document 1).As shown in Figure 7, this steam-tube drier has the rotating cylinder 110 rotatable around axle center, and this rotating cylinder 110 is rotated, thus the dried object being supplied (loading) by the end side from this rotating cylinder 110 is transported to another side and discharge.In this conveyance process, utilize and make dried object dry as the drying heating steam of outer heat.
More specifically, rotating cylinder 110 has the length of such as 10 ~ 30m, between the two end plates of this rotating cylinder 110 inside, multiple heating tube 111 extends along axis direction, and the plurality of heating tube 111 is heated by warmed-up steam is supplied to inside as thermal medium.After the dried object such as moistening powder or nodular powder are fed into the inside of rotating cylinder 110, it, and to be moved to outlet 112 side along with the rotation of rotating cylinder 110 by heat drying successively by contacting with heating tube 111.
In addition, be provided with the mouth blown 113 of carrier gas in the end side of rotating cylinder 110, this carrier gas is discharged from gas exhaust port 122 concomitantly with in the vapor phase that produces of rotating cylinder 110 inside, and this gas exhaust port 122 earthing that is connected with the outlet 112 of another side is arranged.
, because this horizontal rotary drying machine does not in the past possess grading function, therefore at dry coal and then when carrying out classification/removing to particulate, need together to arrange grading plant in addition with this drying machine, equipment cost increases.And, only considering dry or classification respectively due to these devices and design, therefore when using these devices to carry out drying and classification, just carrying out drying and classification successively, operability reduction.
Patent document 1: Japanese Unexamined Patent Publication 2004-44876 publication
Summary of the invention
The major subjects that the present invention will solve is to provide a kind of dry classification machine and the dry classification method that can carry out drying and classification efficiently to treated object.
The present invention solving this problem is as follows.
Invention described in technical scheme 1
A kind of treated object dry classification machine, it is characterized in that, these treated object dry classification facility are standby: the rotating cylinder rotatable around axle center, has the supply port of treated object and carrier gas in the end side of this rotating cylinder, have the outlet of treated object and carrier gas in another side of this rotating cylinder; Heating unit, by treated object from the supply of described supply port and from the process that described outlet is discharged, this heating unit is by carrying out heat drying to the heating of described rotating cylinder inside to treated object; Classification cover, it is arranged to another side covering described rotating cylinder, has the fixing outlet for discharging treated object in the bottom of this classification cover, has the fixing exhaust outlet for discharging carrier gas on the top of this classification cover; And gas dispersion blow afloat unit, it is arranged at the path that treated object in described classification cover arrives described fixing outlet.
(main action effect)
After carrier gas is discharged from the outlet of treated object together with treated object, for the larger-diameter particle of ratio in the treated object accompanied with carrier gas, make it increase can reach capacity in advance due to gravity, therefore, it starts to decline at the moment, and externally discharges from the fixing outlet of classification cover bottom surface together with the treated object not having to accompany with carrier gas.On the other hand, for accompany with carrier gas, the particle of smaller diameter in treated object, it keeps the state accompanied with carrier gas externally to discharge from the fixing exhaust outlet on classification cover top.Thus by particle (particulate) classification/removing from treated object of smaller diameter.
In addition, when blowing afloat gas dispersion, the particulate that have dropped along with the treated object not do not accompanied with carrier gas or can be insufficient and particulate that is that have dropped is blown afloat by gas dispersion, therefore effectiveness of classification raising because rising.And, when gas dispersion is blown afloat in the path that the treated object in classification cover arrives fixing outlet, to particulate to blow afloat effect very reliable, and, the treated object do not blown afloat directly externally is discharged from the fixing outlet of classification cover bottom surface, therefore, without the need to considering, the treated object do not blown afloat is guided to fixing outlet.
Invention described in technical scheme 2
For the treated object dry classification machine described in technical scheme 1, the unit that blows afloat of described gas dispersion is made up of the tubing blown afloat from the hole be formed at its perisporium by gas dispersion,
Described tubing is configured to, and it crosses the path that treated object arrives described fixing outlet.
(main action effect)
When gas dispersion blow afloat unit be cross treated object arrive the tubing in the path of fixing outlet time, such as, by installing tubing with suitable interval, the discharge of the treated object do not blown afloat can not be hindered.Further, when gas dispersion being blown afloat from the hole of the perisporium being formed at tubing, can reliably realize blowing afloat effect to particulate.
Invention described in technical scheme 3
For the treated object dry classification machine described in technical scheme 1, described in the ratio of described classification cover, the height position by the top of rotating cylinder is formed with the settling zone of dispersion treated object.
(main action effect)
When being provided with classification cover in the mode forming settling zone above rotating cylinder, reliably can carrying out classification/removing to above-mentioned particulate in this settling zone, thus effectiveness of classification is improved.
Invention described in technical scheme 4
A dry classification method for treated object, is characterized in that, in the dry classification machine of technical scheme 1, is used by coal as treated object.
(main action effect)
When carrier gas is discharged from another side of rotating cylinder together with coal, in classification space after this discharge, for accompany with carrier gas, in coal than larger-diameter particle, make it increase can reach capacity in advance due to gravity, therefore, it starts to decline at the moment, and is guided downwards in classification space together with the coal not having to accompany with carrier gas.On the other hand, for accompany with carrier gas, the particle of smaller diameter in coal, it keeps the state accompanied with carrier gas to be guided upward in classification space.Therefore, it is possible to by particle (particulate) classification/removing from dried coal of smaller diameter.
Invention described in technical scheme 5
A dry classification method for treated object, is characterized in that, the flow of the carrier gas that the flow-rate ratio of the described gas dispersion in the dry classification machine of technical scheme 1 is blown into from one end of described rotating cylinder is few.
(main action effect)
When the flow of the carrier gas blown in the one end making the flow-rate ratio of gas dispersion from rotating cylinder is few, can not have an impact to the circulation of the carrier gas in rotating cylinder, as a result, also can not have an impact to the drying of treated object.
(invention effect)
According to the present invention, drying and classification can be carried out to treated object efficiently.
Accompanying drawing explanation
Fig. 1 is the front view of the horizontal rotary drying machine of a mode of the present invention.
Fig. 2 is the enlarged drawing of another side of rotating cylinder, and is the figure eliminating classification cover.
Fig. 3 is the sectional view of the X-X line along Fig. 1.
Fig. 4 is the enlarged drawing of classification cover.
Fig. 5 is the enlarged drawing blowing afloat unit of gas dispersion.
Fig. 6 (a) and Fig. 6 (b) is the key diagram blowing afloat unit of gas dispersion.
Fig. 7 is the stereogram of steam-tube drier in the past.
Fig. 8 is the flow chart of the dry classification operation of the 1st mode.
The flow chart of the dry classification operation of Fig. 9 the 2nd mode.
Label declaration
10: rotating cylinder; 11: steam pipe (heating unit); 41: supply port; 50: outlet; 55: classification cover; 56: fixing exhaust outlet; 57: fixing outlet; 58: blow afloat unit; 61: above hold together plate; 65: agitating unit; A: carrier gas; E: handled thing; N: gas dispersion; N1: air; N2: inert gas; W: treated object.
Detailed description of the invention
Below, embodiments of the present invention are described.
Fig. 1 shows the horizontal rotary drying machine used in dry classification in the manner.This horizontal rotary drying machine has cylindric rotating cylinder 10, and be arranged to respect to the horizontal plane tilt a little in the axle center of this rotating cylinder 10, one end of rotating cylinder 10 is positioned at the position higher than the other end.In the below of rotating cylinder 10,2 support units 20 and motor unit 30 are arranged in the mode supporting rotating cylinder 10, and rotating cylinder 10 is rotatable around the axle center of self by means of motor unit 30.As shown in Figure 3, this rotating cylinder 10 is around a direction, and be that (direction of arrow R) rotates counterclockwise in illustrated example, for rotating speed, such as peripheral speed is less than 1m/s.
In the inside of rotating cylinder 10, many steam pipes 11 are installed along the axis direction of rotating cylinder 10 with extending, and described many steam pipes 11 are metal pipe, and can circulate as the steam etc. of heat medium in its inside.Many these steam pipes 11 in such as concentric with the axle center of rotating cylinder 10 mode circumferentially and arranged radially.
As shown in Figure 2, the perisporium of another side of rotating cylinder 10 is formed through multiple outlet 50.Multiple outlet 50 forms 2 row along the circumference of rotating cylinder 10, and is formed separated from each other.In addition, although all shape is identical for multiple outlet 50, its shape also can be made different.
As shown in Figure 3, be provided with multiple of stretching out in the axle center from the inwall of rotating cylinder 10 to rotating cylinder 10 in the inside of rotating cylinder 10 and hold together plate (scratching upper plate) 61.As shown in Figure 1, these multiple on hold together plate 61 and be set to multiple row in the axial direction discretely, be 3 row in illustrated example.As shown in Figure 3, hold together on each panel 60 by be equally spaced separated each other multiple, be 4 are held together plate 61 form in illustrated example.
Hold together plate 61 on each to be formed by the metal of wall thickness, and be formed as terminal part to the front side of the direction of rotation R of rotating cylinder 10 bend hook-shaped.On hold together plate 61 extension elongation be set to 1/10 ~ 3/10 of the internal diameter D of such as rotating cylinder 10.
In addition, holding together plate 61 on each and be configured in the following manner: by being positioned at the front side end of the outlet 50 of the rear side position of the direction of rotation R of rotating cylinder 10, and stretching out near the straight line parallel with the axis direction of rotating cylinder 10.Therefore, upper hold together plate 61 front side in front of there is not outlet 50, but there is the inwall of rotating cylinder 10.
As shown in Figure 1, above hold together panel 60 and be configured between outlet 50 and supply port described later 41 in rotating cylinder 10 inside, and ratio outlet 50 in rotating cylinder 10 inside holds together panel 60 on not existing by the position of another side.In addition, above hold together panel 60 be configured between outlet 50 and supply port 41 by the part of outlet 50.
As shown in Figure 1, the ratio of rotating cylinder 10 inside holds together panel 60 and leans on the position of the end side of rotating cylinder 10 to be provided with agitating unit 65, this agitating unit 65 is for stirring supply (loading) treated object W to rotating cylinder 10 inside.This agitating unit 65 also be configured at being separated near end side being held together panel 60 of rotating cylinder 10 inside.As this agitating unit 65, can example screw as is well known (stud type) agitating unit or anchor formula (inverse pen feather) agitating unit etc.Wherein particularly, due to the cause that the effect of separation of particles (dispersion) and the structure of STD limit, anchor formula mixer means is preferably selected.
As shown in Figure 1 and Figure 4, rotating cylinder 10 is provided with to cover the mode with another side of multiple outlet 50 the classification cover 55 can discharging treated object W and carrier gas A.This classification cover 55 is formed by the metal of wall thickness, and as shown in Figure 3, the fixing outlet 57 of treated object W, i.e. handled thing E after the bottom surface of bottom 55d has dried and classification, has the fixing exhaust outlet 56 of carrier gas A at the end face of top 55u.In addition, the top 55u of classification cover 55 is along with the narrowed width towards fixing exhaust outlet 56 on width orthogonal to the axial direction, and similarly, the bottom 55d of classification cover 55 is also in the direction of the width along with the narrowed width towards fixing outlet 57.During top view, fixing exhaust outlet 56 and fixing outlet 57 are positioned at the substantially central portion of classification cover 55.
Classification cover 55 inside that the inside of classification cover 55 becomes (scope shown in label L) above the classification space being full of air, particularly rotating cylinder 10 becomes settling zone 90.That is, classification cover 55 is arranged in above rotating cylinder 10 and is formed with settling zone 90.In addition, classification cover 55 is fixed on the ground by not shown component, and the rotation not with rotating cylinder 10 together rotates.
As shown in Figure 8 and Figure 9, fixing exhaust outlet 56 opens wide in the vertical direction, and is connected with cleaner unit 201.Carrier gas A is inconjunction with steam and discharges from fixing exhaust outlet 56, and particulate C discharges from fixing exhaust outlet 56 simultaneously.In addition, fixing outlet 57 also opens wide in the vertical direction, and is connected with the transport unit 204 such as conveyer belt.Classification/removing particulate C, and discharge handled thing E from fixing outlet 57.
For the separating distance L between the upper limb of rotating cylinder 10 and fixing exhaust outlet 56, be preferably separating distance L and meet L > 0.3D relative to the internal diameter D of rotating cylinder 10, be more preferably separating distance L and meet 0.8D < L < 4D relative to the internal diameter D of rotating cylinder 10, be particularly preferably separating distance L and meet 1.0D < L < 2.5D relative to the internal diameter D of rotating cylinder 10.If separating distance L is below 0.3D, then cannot give full play to grading function, larger-diameter particle F is also together discharged by fixing exhaust outlet 56 with carrier gas A, may cause the load increase of effectiveness of classification reduction, cleaner unit 201.On the other hand, if separating distance L is more than 4.0D, then can exceed the space of the necessary separating distance of classification and uneconomical because arranging.
In addition, as shown in Figure 4, classification cover 55 expands vertically at settling zone 90 place.If classification cover 55 expands vertically at settling zone 90 place, then the probability that particulate C and other particle F etc. or classification cover 55 (particularly wall material 55A, the 55B at the axial two ends of classification cover 55) collide mutually reduces, and therefore effectiveness of classification improves.In addition, what is called expands vertically, refers to that the coupling part than being connected with rotating cylinder 10 expands.
Settling zone 90 is without the need to expanding vertically endlong throughout above-below direction.Near rotating cylinder 10, at once along planar diffusion, therefore also can not expand vertically as illustrated example after particulate C etc. are discharged from rotating cylinder 10 by outlet 50.In addition, for the top 55u of classification cover 55, be preferably in the axial direction along with the narrowed width towards fixing exhaust outlet 56 as illustrated example.
When set the axial length of the coupling part be connected with rotating cylinder 10 as the axial length of Z1, enlarged be Z2, for the enlarged degree of classification cover 55, preferably make 1.5Z1 < Z2 < 6Z1, be more preferably and make 2Z1 < Z2 < 4Z1.
In settling zone 90, as shown in Figure 3 and Figure 4, between the wall material 55A and the wall material 55B of axial the opposing party of an axially side of classification cover 55, many support members (62,63) are provided with.Although there is the possibility making intensity reduce because classification cover 55 expands vertically, by being provided with many support members (62,63) between the wall material 55A and the wall material 55B of axial the opposing party of an axial side, the intensity of classification cover 55 can be kept.In addition, as illustrated example, classification cover 55 the part do not expanded vertically, between side's wall material 55A and the opposing party's wall material 55B, support member (62,63) also can be set.
For the support member of the intensity for keeping classification cover 55, also only can be made up of the bar and tubing etc. of linearity, but in the manner, being be made up of tubing 62 and the umbrella material 63 be configured on this tubing 62.Umbrella material 63 is formed as umbrella outstanding above the mediad of width, and configures with extending along the bearing of trend of tubing 62.By the existence of umbrella material 63, treated object W is prevented to be deposited on tubing 62.Umbrella material 63 self can have the function of the intensity for keeping classification cover 55, also can not have this function.
As described above, the top 55u of classification cover 55, in the direction of the width along with the narrowed width towards fixing exhaust outlet 56, but, in this case, as shown in Figure 3, preferably makes support member (62,63) not be positioned at the below of fixing exhaust outlet 56.When the top 55u of classification cover 55 during narrowed width, as shown in Figure 3, produce the air-flow S1 of the wall material along this narrowed width, and particulate C is attached to this air-flow S1 along with towards fixing exhaust outlet 56 in the direction of the width.Therefore, the particulate C of rising can not collide mutually with the end face of classification cover 55 and decline, and effectiveness of classification improves.In addition, in the inside of classification cover 55, while producing the air-flow S1 along above-mentioned wall material, main to produce at the air-flow S2 that rises of central vertical ground, particulate C is also attached to this air-flow S2.Therefore, if many support members (62,63) are not positioned at the below of fixing exhaust outlet 56, then be attached to central vertical the particulate C of air-flow S2 that rises can not collide mutually with support member (62,63) and decline, effectiveness of classification improves further.
As shown in Figure 3, in the inside of classification cover 55, in the below of being arrived by free-falling etc. the path of fixing outlet 57 from the outlet 50 of rotating cylinder 10 of treated object W, i.e. rotating cylinder 10, what be provided with gas dispersion N blows afloat unit 58.Like this when gas dispersion N is blown afloat in the inside (classification space) of classification cover 55, the particulate C that have dropped along with the treated object W not do not accompanied with carrier gas A or can not and the particulate C that have dropped can be blown afloat by gas dispersion N, therefore effectiveness of classification raising because rising.In addition, when blowing afloat gas dispersion N on the path that outlet 57 is fixed in the arrival of treated object W, reliable for effect to blowing afloat of following particulate C: to discharge and the particulate C of free-falling in rotating cylinder 10 with the state encased by the treated object W do not accompanied with carrier gas A, and, the treated object W do not blown afloat directly externally discharges from the fixing outlet 57 of classification cover 55 bottom surface as handled thing E, therefore, without the need to considering, the treated object W do not blown afloat is guided to fixing outlet 57.
As described above, in the present embodiment, not only utilize settling zone 90, also utilize the whole region of classification space (classification cover 55 is inner), respectively the particulate C in treated object W is guided upward together with carrier gas A, the treated object W of removing particulate C is guided downwards.
The concrete mode blowing afloat unit 58 of gas dispersion N is not particularly limited, and also by the dispersion plate that is such as made up of net material etc. and can be consisted of by the unit that gas dispersion N blows afloat the mesh of this net material.In addition, on the path that outlet 57 is fixed in the arrival of treated object W, setting does not blow afloat unit 58, although can consider to make dispersion plate tilt towards fixing outlet 57 in such scheme, even if but dispersion plate is tilted, the treated object W do not blown afloat also can be deposited on dispersion plate, therefore, need to consider separately treated object W to be guided to fixing outlet 57.
On the other hand, in the present embodiment, unit 58 is blown afloat as gas dispersion N, be configured to as shown in Figure 5 and Figure 6: there is tubing 58A, this tubing 58A crosses treated object W and arrives the path of fixing outlet 57 and on perisporium, form porose 58Ac, blows afloat gas dispersion N from the hole 58Ac being formed at this tubing 58A.Make the unit 58 that blows afloat of gas dispersion N be made up of the tubing 58A in the path of crossing the fixing outlet 57 of treated object W arrival like this, then without the need to considering, the treated object W do not blown afloat is guided to fixing outlet 57.In addition, when gas dispersion N being blown afloat from the hole 58Ac of the perisporium being formed at tubing 58A, can reliably realize blowing afloat effect to particulate C.
In the manner, the hole 58Ac being formed at the perisporium of tubing 58A for circular, and separate suitable compartment of terrain and is formed multiple on the bearing of trend of tubing 58A.In addition, as shown in Fig. 6 (a), hole 58Ac is formed in the mode making gas dispersion N and blow afloat obliquely upward.
As illustrated example, preferably many tubing 58A are arranged in parallel vertically near fixing outlet 57.In the manner, on the treated object W that gas dispersion N is blown to for declining between tubing 58A adjacent one another are, thus particulate C is blown afloat by gas dispersion N, on the other hand, the treated object W do not blown afloat directly declines between tubing 58A, and is externally discharged from fixing outlet 57 as handled thing E.In addition, the particulate C blown afloat by gas dispersion N after classification cover 55 inside is flown upward, and then flies upward in carrier gas A and externally discharges from fixing exhaust outlet 56.
The tubing group that multilayer is made up of many tubing 58A also can be set in the vertical direction discretely.In addition, the amount of the gas dispersion N blown afloat from each hole 58Ac also can be changed according to the amount of the treated object W declined.Further, also as the manner, umbrella material 58B can be configured on each tubing 58A.This umbrella material 58B is formed as umbrella outstanding above the mediad of width, and extends along the bearing of trend of tubing 58A.By the existence of umbrella material 58, treated object W is more reliably prevented to be deposited on tubing 58A.
As gas dispersion N, such as than air, the inert gas such as nitrogen or argon gas etc. can also be used, as long as carry out selecting according to the characteristic of treated object W.But, be the situation that coal etc. has the treated object of ignition quality at treated object W, or when treated object W is the treated object causing dust explosion such, preferably use inert gas.
In the present embodiment, as shown in Figure 8, the inert gas N2 such as nitrogen are mixed in air N1, utilize in heat exchanger 205 the thermophore S such as steam using after this entrained gas is heated as gas dispersion N.
Although inert gas N2 is not particularly limited relative to the ratio that is mixed into of air N1, but be the situation that coal etc. has the treated object of ignition quality at treated object W, or when treated object W is the treated object causing dust explosion such, to make, the oxygen concentration of the gas from fixing exhaust outlet 56 discharge is less than 13%, the mode of less than 12% that is preferably is mixed into inert gas N2.Being suppressed by oxygen concentration lower is like this in order to avoid the particulate C of coal etc. blasts.In addition, because carrier gas A contains drying along with treated object W and vaporized steam, therefore oxygen concentration reduces, and the possibility that particulate C blasts is low.That is, this blast becomes significant problem because being blown into gas dispersion N.
, if increase inert gas N2 be mixed into ratio, then cost raises, on the other hand, gas dispersion N, just after discharging from fixing exhaust outlet 56 together with carrier gas A etc., utilizes the cleaner unit 201 be connected with the transport unit 202 such as conveyer belt to remove particulate C, then just from chimney 203 discharge.
Therefore, as shown in Figure 9, preferably using the gas of discharging from fixing exhaust outlet 56 utilize cleaner unit 201 remove particulate C after recycle as gas dispersion N.For the carrier gas A (comprising gas dispersion N) that the inside (classification space) from classification cover 55 is discharged, its oxygen concentration is lower, and has been heated, therefore, it is possible to utilized well as gas dispersion N by the carrier gas A after removing particulate C.Certainly, heat exchanger 205 also can be utilized suitably to heat to this carrier gas A.
For the carrier gas A discharged from fixing exhaust outlet 56, although also it all can be utilized as gas dispersion N, also as illustrated example, only can utilize a part, and remainder is expelled to air from chimney 203., the flow of the carrier gas A preferably making the flow-rate ratio of gas dispersion N blow into from one end of rotating cylinder 10 is few, is more preferably and makes the flow of gas dispersion N be 1/5 ~ 1/2 of the flow of this carrier gas A.Like this, when the flow of the carrier gas A blown in the one end making the flow-rate ratio of gas dispersion N from rotating cylinder 10 is few, can not have an impact to the circulation of the carrier gas A in rotating cylinder 10, as a result, also can not have an impact to the drying of treated object W.
At this, when treated object W be coal etc. there is the treated object of ignition quality, or when treated object W is the treated object that can cause dust explosion, expect that the oxygen concentration of the gas of discharging from fixing exhaust outlet 56 is less than 13% (preferably less than 12%).Therefore, although not shown, utilize the oxygen concentration of oxymeter to the gas of discharging from fixing exhaust outlet 56 to measure (supervision), when this measured value exceedes setting, preferably inert gas is mixed in gas dispersion N to make this measured value be less than predetermined value.
On the other hand, as shown in Figure 1, supply pipe 70 and the bleeder pipe 71 for supplying steam in steam pipe 11 is provided with in another side of rotating cylinder 10.In addition, in the end side of rotating cylinder 10, the mode being embedded in rotating cylinder 10 is provided with feeding screw 42, there is in the inside of this feeding screw 42 screw rod (Screw), and this feeding screw 42 is formed as cylindric.The driver elements 43 such as the motor for making the bolt rotary being located at feeding screw 42 inside are provided with in one end of this feeding screw 42.And supply port 41 is in the opened upper end of feeding screw 42, and the inside of feeding screw 42 is communicated with this supply port 41.
By the inside for being supplied to feeding screw 42 from supply port 41 by the treated object W of the horizontal rotary drying machine drying of present embodiment, and utilize driver element 43 to make to be arranged at the bolt rotary of this feeding screw 42 inside, thus, treated object W is supplied to the inside of rotating cylinder 10.In addition, near feeding screw 42, be provided with not shown gas be blown into unit, described gas is blown into air, inert gas etc. are blown into rotating cylinder 10 by unit inside as carrier gas A from the supply port 41 also as gas mouth blown, by this gas be blown into carrier gas A that unit has been blown into towards rotating cylinder 10 another side at the internal circulation of rotating cylinder 10.
Below, the action of horizontal rotary drying machine is described.
When utilizing this horizontal rotary drying machine to carry out drying to treated object W, as shown in Figure 1, treated object W is supplied to supply port 41.The treated object W be supplied to from supply port 41 is supplied to the inside of rotating cylinder 10 by feeding screw 42, contacts with the steam pipe 11 be heated by steam and dried, and move (drying process) to the other end side of rotating cylinder 10.
Arrive the position at agitating unit 65 place at treated object W after, be stirred unit 65 and stir, then, as shown in Figure 3, hold together on plate 61 on being rotated by the rotation along with rotating cylinder 10.By the treated object W that above held together upper hold together plate 61 be positioned at the upside of rotating cylinder 10 time naturally fall, now, the particulate C that treated object W comprises disperses in rotating cylinder (so-called fly upward (flight) action).
On the other hand, what be arranged at the end side of rotating cylinder 10 is blown into carrier gas A that unit has been blown into from supply port 41 by rotating cylinder 10, and is discharged to rotating cylinder 10 from the outlet 50 also as the outlet of treated object W.Now, carrier gas A is discharged from outlet 50 with above holding together the particulate C that plate 61 is scattered in rotating cylinder 10.The carrier gas A discharged from outlet 50 and particulate C concomitantly discharges from the inside of classification cover 55 (classification space) via fixing exhaust outlet 56.Further, gas dispersion N is supplied by the unit 58 that is blown into of gas dispersion N in the mode blowing afloat gas dispersion N towards the top of classification cover 55.Usually the flow of the flow-rate ratio carrier gas A of this gas dispersion N is little.In addition, when carrier gas A discharges from outlet 50, the flow velocity of carrier gas A is such as 5 ~ 10m/s.According to the area of outlet 50 and the amount of being blown into of carrier gas A, suitable adjustment is carried out to this flow velocity.
Large and the particle of Heavy Weight of particle diameter in treated object W falls rotating cylinder 10 in, not adjoint carrier gas A, but the outlet 50 on the downside of being positioned at falls naturally.This particle naturally fallen (treated object W) is not blown afloat by gas dispersion N further yet, but by being discharged to outside as handled thing E from fixing outlet 57 between tubing 58A.In addition, although the larger particle F of the diameter in treated object W discharges from outlet 50 along with carrier gas A, but due to its Heavy Weight, do not arrive fixing exhaust outlet 56 together with carrier gas A, but fall downwards, and the treated object W large with particle diameter concomitantly discharges from fixing outlet 57 as handled thing E.
Below, the action effect of horizontal rotary drying machine is described.
As the horizontal rotary drying machine of present embodiment, when above holding together plate 61 and being arranged at the inside of rotating cylinder 10, particulate C contained by treated object W disperses in the space of rotating cylinder 10 inside, thus this particulate C can be made to be attached to carrier gas A, and externally discharge from fixing exhaust outlet 56 together with carrier gas A.As a result, classification/removing can be carried out to the particulate C contained by treated object W.
And, hold together plate 61 on each when being configured in the following manner: by being positioned at the front side end of the outlet 50 of rear side for benchmark with the direction of rotation R of rotating cylinder 10, and stretch out near the straight line parallel with the axis direction of rotating cylinder 10, then the treated object W being placed on plate 61 is positioned at the rear side of outlet 50.Therefore, can prevent from the treated object W on plate 61 directly to enter outlet 50, the probability that the treated object W making to mix the state having particulate C discharges from outlet 50 reduces.
When holding together the position that panel 60 is positioned at along the axis direction interval of rotating cylinder 10 on multiple, on the treated object W of the inner movement of rotating cylinder 10 alternately passes through the part of existence being held together plate 61 and do not exist, hold together the part of plate 61.Therefore, be divided into and hold together on treated object W in multiple times, thus make efficiency to improve.
In addition, when above hold together plate 61 in the circumference of rotating cylinder 10 each other with equal intervals discretely interval configuration time, can efficiently on hold together treated object W.Specifically, when stretch out from the inwall of rotating cylinder 10 towards axle center and along with the rotation of rotating cylinder 10, treated object W is held together, the row that hold together plate 61, namely panel 60 is held together on when being provided with multiple at spaced intervals in the circumferential, carrier gas A is through holding together the treated object W that plate 61 falls from above, therefore, a lot of particulate C and carrier gas A can be made to accompany, thus effectiveness of classification is improved.And, utilization is held together panel 60 and also there is following attendant advantages thereof: the contacting efficiency that can improve treated object W and steam pipe 11, thus drying efficiency is improved.
In the present embodiment, upper hold together in panel 60, at least another side (downstream) on hold together panel 60 on hold together plate 61 and there is following such position relationship: hold together plate 61 on described with the direction of rotation R of rotating cylinder 10 for benchmark, the position of the front lateral margin close to outlet 50 is held together on having the cardinal extremity of plate 61, and described on hold together plate 61 and stretch out towards axle center from the inwall of rotating cylinder 10.Therefore, it is possible to keep between the next outlet 50 holding together the direction of rotation front side of plate 61 and rotating cylinder 10 on described and on hold together a lot of treated object W.As a result, compared with converter action (キ Le Application ア Network シ ヨ Application), can more carefully stir treated object W, thus improve the grading effect to treated object W.
In addition, in the present embodiment, above hold together plate 61 and be configured to, the axle center from cardinal extremity towards rotating cylinder 10 is stretched out, the terminal part stretched out with the direction of rotation R of rotating cylinder 10 for benchmark forwards bends.Therefore, it is possible to keep between the next outlet 50 holding together the direction of rotation front of plate 61 and rotating cylinder 10 on described and on hold together more treated object W.As a result, the grading effect to treated object W can be improved further.
When than on hold together panel 60 position of the end side of rotating cylinder 10 is provided with the agitating unit 65 for stirring the treated object W be fed in rotating cylinder 10 time, due to utilization on hold together plate 61 couples of treated object W carry out on hold together before treated object W be stirred, the particulate C therefore contained by treated object W is out screened.As a result, make the dispersion efficiency of plate 61 disperse particles C to improve.In addition, although also can not arrange above agitating unit 65 and on hold together plate 61, if arrange, then can make the raisings such as classification efficiency, become preferred device.
When outlet 50, fixing outlet 57 and fixing exhaust outlet 56 are combined, in the whole classification space comprising settling zone 90, utilize carrier gas A and gas dispersion N to carry out classification, wherein, described outlet 50 is arranged at the perisporium of rotating cylinder 10 and circumferentially moves along with the rotation of rotating cylinder 10, the bottom of the classification cover 55 that the mode that described fixing outlet 57 is arranged to cover this outlet 50 is arranged, and be fixed and cannot move, described fixing exhaust outlet 56 is arranged at the top of classification cover 55.That is, realize classification by following manner: particulate C above being directed to along with carrier gas A after discharge from fixing exhaust outlet 56, remaining particle be directed to below and discharge from fixing outlet 57.
When classification cover 55 inside above rotating cylinder 10 become be filled with air space, namely settling zone 90 time, the larger-diameter particle F of the ratio accompanied with carrier gas A is fallen by inertia in settling zone 90, and discharges from fixing outlet 57.
Be provided with on the path of the treated object W above fixing outlet 57 gas dispersion N blow afloat unit 58 time, the particulate C fallen to fixing outlet 57 together with other treated objects W can be made to increase towards fixing exhaust outlet 56, as a result, improve the classification/removing efficiency of particulate C.
In the present embodiment, hold together on each panel 60 often arrange on hold together plate 61 number may not be 4, be not particularly limited, but in order to ensure on hold together capacity, preferably arrange 4 ~ 6.In addition, for the quantity of every row outlet 50, although be not particularly limited, consider the mechanical strength etc. reducing the pressure loss, disperse particles C and rotating cylinder 10, preferably arrange 10 ~ 17.
Utilizability in industry
The present invention can apply as the machinery and the method treated objects such as coal being carried out to drying and classification.As horizontal rotary drying machine, although preferred steam-tube drier (STD), paddle agitator (PaddleMixer) etc. also can be adopted.
Claims (4)
1. a treated object dry classification machine, is characterized in that,
These treated object dry classification facility are standby:
The rotating cylinder rotatable around axle center, has the supply port of treated object and carrier gas in the end side of this rotating cylinder, have the outlet of treated object and carrier gas in another side of this rotating cylinder;
Heating unit, by treated object from the supply of described supply port and from the process that described outlet is discharged, this heating unit is by carrying out heat drying to the heating of described rotating cylinder inside to treated object;
Classification cover, it is arranged to another side covering described rotating cylinder, has the fixing outlet for discharging treated object in the bottom of this classification cover, has the fixing exhaust outlet for discharging carrier gas on the top of this classification cover; And
Gas dispersion blow afloat unit, it possesses tubing, described tubing in described classification cover, the midway in path that treated object declines towards fixing outlet crosses this path, and formed porose on the perisporium of described tubing, the blowing afloat unit and can blow afloat gas dispersion from the hole being formed at this tubing of described gas dispersion.
2. treated object dry classification machine according to claim 1, wherein,
Described in the ratio of described classification cover, the height position by the top of rotating cylinder is formed with the settling zone of dispersion treated object.
3. a dry classification method for treated object, is characterized in that,
In the dry classification machine of claim 1, coal is used as treated object.
4. a dry classification method for treated object, is characterized in that,
The flow of the carrier gas that the flow-rate ratio of the described gas dispersion in the dry classification machine of claim 1 is blown into from one end of described rotating cylinder is few.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-164914 | 2010-07-22 | ||
| JP2010-164916 | 2010-07-22 | ||
| JP2010164916A JP5388962B2 (en) | 2010-07-22 | 2010-07-22 | Dry classification method for workpieces |
| JP2010164914A JP5230700B2 (en) | 2010-07-22 | 2010-07-22 | Horizontal rotary dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102345974A CN102345974A (en) | 2012-02-08 |
| CN102345974B true CN102345974B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110205311.8A Active CN102345974B (en) | 2010-07-22 | 2011-07-21 | Drying and grading machine for processed object and drying and grading method |
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| Country | Link |
|---|---|
| KR (1) | KR101795048B1 (en) |
| CN (1) | CN102345974B (en) |
| BR (1) | BRPI1104139A2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5778831B1 (en) * | 2014-03-31 | 2015-09-16 | 月島機械株式会社 | Method of drying workpiece and horizontal rotary dryer |
| CN104789244B (en) * | 2015-04-13 | 2017-11-21 | 陕西煤业化工集团神木天元化工有限公司 | A kind of rotary furnace pulverized coal pyrolysis with coal gas circulation produces anthracite method |
| CN104774631B (en) * | 2015-04-13 | 2017-04-12 | 陕西煤业化工集团神木天元化工有限公司 | Dedusting technique of rotary furnace for producing blind coal from powder coal |
| KR102090283B1 (en) * | 2017-07-19 | 2020-03-17 | 주식회사 엘지화학 | Drying System Comprising Structure for Removing Fine Particle from Inside of Heat-Exchanger Tube |
| JP6572464B2 (en) | 2017-09-19 | 2019-09-11 | 中部電力株式会社 | Heating apparatus and heating method using superheated steam |
| CN112304054B (en) * | 2020-11-02 | 2021-12-21 | 安徽济生元药业有限公司 | Processing equipment of DHA algae oil soft capsule |
| CN115283254B (en) * | 2022-07-29 | 2023-08-25 | 中触媒新材料股份有限公司 | Rapid screening and activating system and method for air flow of oxygen-making adsorbent particles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764779Y (en) * | 2004-12-22 | 2006-03-15 | 沈阳戴维环保节能设备有限公司 | Rotary processing unit for semi-coked filtering material |
| CN102292610A (en) * | 2009-01-23 | 2011-12-21 | 月岛机械株式会社 | Horizontal rotary drying machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001272169A (en) * | 2000-03-27 | 2001-10-05 | Kurimoto Ltd | Continuous type rotary drier |
| JP2005274060A (en) * | 2004-03-25 | 2005-10-06 | Kubota Corp | Wet ash drying device |
-
2011
- 2011-07-21 KR KR1020110072685A patent/KR101795048B1/en active IP Right Grant
- 2011-07-21 BR BRPI1104139-0A patent/BRPI1104139A2/en not_active Application Discontinuation
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764779Y (en) * | 2004-12-22 | 2006-03-15 | 沈阳戴维环保节能设备有限公司 | Rotary processing unit for semi-coked filtering material |
| CN102292610A (en) * | 2009-01-23 | 2011-12-21 | 月岛机械株式会社 | Horizontal rotary drying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102345974A (en) | 2012-02-08 |
| KR101795048B1 (en) | 2017-11-07 |
| KR20120018278A (en) | 2012-03-02 |
| BRPI1104139A2 (en) | 2013-01-15 |
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