CN104964572B - A kind of pellet calcination rotary kiln product waste heat annular dividing wall type recovery system and method - Google Patents
A kind of pellet calcination rotary kiln product waste heat annular dividing wall type recovery system and method Download PDFInfo
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- CN104964572B CN104964572B CN201510437312.3A CN201510437312A CN104964572B CN 104964572 B CN104964572 B CN 104964572B CN 201510437312 A CN201510437312 A CN 201510437312A CN 104964572 B CN104964572 B CN 104964572B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a kind of pellet calcination rotary kiln product waste heat annular dividing wall type recovery system and method, belong to rotary kiln product heat recovery technology field.The recovery system of the present invention, including annular septate heat transfer mechanism and ajutage heat exchange mechanisms.High temperature section cover body and middle-temperature section cover body are the cylinder of both ends open, and the internal diameter of high temperature section cover body and middle-temperature section cover body is all higher than the external diameter of cooling cylinder, and high temperature section cover body is enclosed within described high temperature section, and middle-temperature section cover body is enclosed within described middle-temperature section.Ajutage heat exchange mechanisms includes ajutage, ajutage includes ajutage soaking zone and ajutage bringing-up section, ajutage bringing-up section is located at the inside of cooling cylinder, the port of export of ajutage bringing-up section stretches out the charging aperture of cooling cylinder, and the port of export of ajutage bringing-up section is connected with the air intlet of burner by pipeline.Present invention achieves raising rotary kiln utilization rate of waste heat, minimizing cooling water consumption, reduce the probability that cooling device is corroded and the target improving operating environment.
Description
Technical field
The present invention relates to rotary kiln product heat recovery technology field, more particularly, it relates to a kind of pellet calcination rotary kiln product
Waste heat annular dividing wall type recovery system and method.
Background technology
Calcined by rotary kiln is the main technique producing bioceramic filtrate, and its effect is raw material (i.e. clay and the powder producing filtrate
The spherical particle that coal ash is made) carry out drying and sintering processes, wherein, drying section in order to get rid of the moisture contained by ceramic filter material,
Sintering stage makes filtrate bead reach the intensity needed for commercial Application and hardness requirement by calcining.
In existing bioceramic filtrate production technology, all use rotary kiln as its main calciner.Combustion system is by heat
Measure and feed in rotary kiln with the form of high-temperature flue gas, the ceramic filter material of reverse flow is carried out heating and calcining.Complete calcination process
Ceramic filter material is discharged from kiln hood chute at high operating temperatures, enters cooling cylinder cooling.In order to strengthen cooling effect, generally in cooling
Drum outer wall carries out cool water shower, the heat stored in rear ceramic filter material to take away high temperature to forge, and reduces ceramic filter material temperature
Purpose.Recycle during after spray, heated cooling water flows into water reservoir.But, above-mentioned bioceramic filtrate production technology has
The shortcoming having following several respects: the residual heat resources that the pellet (i.e. ceramic filter material) after (1), high-temperature calcination carries are completely wasted,
Run counter to the recycling economy principle of energy-saving and emission-reduction；(2), during cool water shower, a large amount of cooling water become steam and lose,
Cooling water consumption is big, is unfavorable for the saving of water resource；And consume a large amount of electric power during cooling water circulation spray；(3), long
The spray of phase cooling water, severe oxidation has corroded cooling device, adds the cost of overhaul of the equipments and maintenance；(4), spray for a long time
Cooling procedure environment around creates a large amount of vapours, is degrading operating environment.
For reclaiming dispersed heat in pellet production process, the technical scheme being correlated with in prior art is open, as patent is public
The number of opening: CN 203824299 U, publication date: on 09 10th, 2014, invention and created name was: rotary kiln UTILIZATION OF VESIDUAL HEAT IN is tied
Structure and rotary kiln production system, this application case discloses a kind of rotary kiln waste heat utilization structure and rotary kiln production system, rotary kiln
Waste heat utilization structure includes connecting back to rotary kiln discharging pipeline, the combustion-supporting gas pipeline of rotary kiln and cooling kiln and is connected with rotary kiln
Fuel gas pipeline, combustion-supporting gas pipeline extends past and is connected to rotary kiln in rotary kiln discharging pipeline, with can be by combustion-supporting gas
It is fed in rotary kiln.After combustion-supporting gas utilizes the waste heat of rotary kiln to heat in rotary kiln discharging pipeline, then it is passed through revolution
Kiln, thus reduce the consumption of combustion gas.Meanwhile, combustion-supporting gas waste heat with rotary kiln in rotary kiln discharging pipeline carries out heat friendship
Change such that it is able to reduce the cooling load of follow-up cooling technique.But this application case there is also following weak point: (1), pellet
In rotary kiln discharging pipeline, residence time is shorter, and heat entrained on pellet is difficult to make full use of, rotary kiln UTILIZATION OF VESIDUAL HEAT IN
Inefficiency；(2), cooling down in kiln is still required for cooling down it by the way of spray the pellet with uniform temperature, do so is wasted
Substantial amounts of residual heat resources, cooling water consumption is big, adds the cost of overhaul of the equipments and maintenance, is degrading operating environment.
In sum, how to overcome pellet calcination rotary kiln utilization rate of waste heat cooling water waste low, a large amount of in prior art,
Cooling device is easily corroded and the deficiency of severe operational environment, is the technical barrier currently needing solution badly.
Summary of the invention
1. invention to solve the technical problem that
It is an object of the invention to overcome pellet calcination rotary kiln utilization rate of waste heat cooling water waste low, a large amount of in prior art,
Cooling device is easily corroded and the deficiency of severe operational environment, it is provided that a kind of pellet calcination rotary kiln product waste heat annular dividing wall type
Recovery system and method, it is achieved that raising rotary kiln utilization rate of waste heat, minimizing cooling water consumption, minimizing cooling device are rotten
The probability of erosion and the target improving operating environment.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is:
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present invention, including burner, combustor, rotary kiln,
Discharging opening, cooling cylinder bearing block, cooling cylinder driving wheel and cooling cylinder, described burner produces combustion flame in combustor, calcining
Pellet in rotary kiln；Pellet after calcining flows out the charging aperture arriving cooling cylinder from discharging opening；Described cooling cylinder bearing block has two
Individual, cooling cylinder is installed on the cooling cylinder bearing block of two differing heights obliquely so that the height at cooling cylinder charging aperture is higher than
The height of cooling cylinder discharge outlet；Cooling cylinder drive wheel cooling cylinder rotates；
Also include annular septate heat transfer mechanism and ajutage heat exchange mechanisms；Described cooling cylinder is along cooling cylinder charging aperture to cooling cylinder discharging
The direction of mouth is divided into three sections, is called high temperature section, middle-temperature section and low-temperature zone；
Described annular septate heat transfer mechanism includes blower fan, air inducing house steward, high temperature section induced duct, high temperature section cover body and middle-temperature section cover body；
Described high temperature section cover body and middle-temperature section cover body are the cylinder of both ends open；The internal diameter of high temperature section cover body and middle-temperature section cover body is all higher than
The external diameter of cooling cylinder；High temperature section cover body is enclosed within described high temperature section, and middle-temperature section cover body is enclosed within described middle-temperature section；High temperature section air inducing
The entrance point of pipe is connected with the centre position of high temperature section cover body side, the port of export of high temperature section induced duct and the side of air inducing house steward
It is connected；The entrance point of air inducing house steward is connected with the centre position of middle-temperature section cover body side, the port of export of air inducing house steward and blower fan
Inlet scoop be connected；
Described ajutage heat exchange mechanisms includes that ajutage, ajutage include ajutage soaking zone and ajutage bringing-up section；Described air-supply
The entrance point of pipe soaking zone is connected with the air outlet of blower fan, the port of export of ajutage soaking zone and the entrance point of ajutage bringing-up section
Being connected, the outer surface of ajutage soaking zone uses thermal insulation material parcel；Ajutage bringing-up section is located at the inside of cooling cylinder, air-supply
The port of export of pipe bringing-up section stretches out the charging aperture of cooling cylinder, and the port of export of ajutage bringing-up section is by the air intlet of pipeline with burner
It is connected.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved,
Also include the cutting agency being located between discharging opening and cooling cylinder charging aperture, described cutting agency include chute, fixed jaw,
Dynamic jaw and cam, fixed jaw is L-shaped, and fixed jaw is fixed on the side on chute top, and the upper end of dynamic jaw is solid by a rotary shaft
The medial surface being scheduled on the side on chute top and dynamic jaw is relative with fixed jaw；Described cam is located at the lower section of dynamic jaw and cam and dynamic jaw
Lateral surface contact；Being fixed with rotating shaft on the center of rotation of cam, this rotating shaft is connected with the output shaft of frequency conversion motor, and dynamic jaw leads to
Cross the rotation of cam and swing.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved, described middle temperature
Section cover body includes that middle-temperature section upper outlet body and middle-temperature section lower cover, middle-temperature section upper outlet body and middle-temperature section lower cover are semi-cylindrical shaped, in
Connecting plate all it is fixed with, on middle-temperature section upper outlet body side end face on the side end face of temperature section upper outlet body and on the side end face of middle-temperature section lower cover
Connecting plate cooperate with the connecting plate on middle-temperature section lower cover side end face and be fixed together by connecting bolt；
The structure of described high temperature section cover body is identical with the structure of middle-temperature section cover body.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved,
On described middle-temperature section cover body, middle position is referred to as cover body expanding reach, and the internal diameter of this cover body expanding reach is more than on middle-temperature section cover body
Internal diameter at both sides, centre position；
On described high temperature section cover body, middle position is referred to as high temperature section cover body expanding reach, and the internal diameter of this high temperature section cover body expanding reach is more than
Internal diameter at both sides, centre position on high temperature section cover body.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved,
The inner surface of described ajutage bringing-up section is welded with gusset the most equally spacedly；The inner surface of described cooling cylinder is circumferentially etc.
It is welded with scattering rod to spacing；Described scattering rod is L-shaped, and one end of scattering rod is welded in the inner surface of cooling cylinder.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved,
Described chute, fixed jaw, dynamic jaw and cam all use heat resisting steel to make；
In dynamic jaw swing process, dynamic distance controlling between jaw and fixed jaw is 20～50mm；
The outer surface of ajutage soaking zone uses heat-preservation cotton parcel.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved,
The described axis of high temperature section cover body overlaps with the axis of high temperature section, the axis of middle-temperature section cover body and the axis of middle-temperature section
Line overlaps；A length of the 1500 of high temperature section cover body～2000mm, a length of the 3000 of middle-temperature section cover body～4500mm；High temperature
On section cover body, internal diameter at high temperature section cover body expanding reach both sides is more than the external diameter 20～100mm of cooling cylinder, middle-temperature section cover body upper outlet body
Internal diameter at expanding reach both sides is more than the external diameter 20～100mm of cooling cylinder；The internal diameter of cover body expanding reach is more than middle-temperature section cover body upper cover
Internal diameter 20～200mm at body expanding reach both sides, the internal diameter of high temperature section cover body expanding reach is more than high temperature section cover body on high temperature section cover body
Internal diameter 20～200mm at expanding reach both sides；A length of the 200 of cover body expanding reach～1500mm, high temperature section cover body expanding reach
A length of 200～1500mm；The internal diameter of air inducing house steward and high temperature section induced duct is 200～500mm；Ajutage soaking zone
Being 150～500mm with the internal diameter of ajutage bringing-up section, the internal diameter of the ajutage bringing-up section port of export is reduced into 50～100mm.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved,
The quantity of described gusset is 10～20 pieces, and the height of every piece of gusset is 30～80mm.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system as the present invention is further improved, described low temperature
Section be arranged over spray equipment.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery method of the present invention, comprises the following steps,
Step A: after calcining, temperature is the pellet of 800～900 DEG C in rotary kiln, flows out from discharging opening, through cutting agency
Enter the charging aperture of cooling cylinder；Wherein, pellet realizes broken in cutting agency, and the hunting frequency of dynamic jaw is 2～5 times/second,
In dynamic jaw swing process, dynamic distance controlling between jaw and fixed jaw is 20～50mm；
Step B: cooling cylinder drive wheel cooling cylinder rotates, and makes the pellet at cooling cylinder charging aperture be transported to cooling cylinder discharging
Mouthful；Pellet heats cooling cylinder and ajutage bringing-up section in cooling cylinder, and on cooling cylinder, the wall mean temperature of high temperature section is
550 DEG C, the wall mean temperature of middle-temperature section is 400 DEG C, and the wall mean temperature of low-temperature zone is 150 DEG C；Wherein, cooling cylinder
The pellet of inner bottom is gathered along with the rotation of cooling cylinder, the scattering rod of cooled cylinder inner bottom, and the pellet gathered is rotating extremely
Free-falling during cooling cylinder inner tip, is gathered then free-falling by scattering rod after pellet free-falling once more, reciprocal with this,
Until pellet is discharged from cooling cylinder discharging opening；
Step C: open blower fan, blower fan passes through the air in circumferential weld between high temperature section induced duct extracting high-temperature section cover body and high temperature section,
And between high temperature section cover body and high temperature section, the wall with high temperature section in extraction process of the air in circumferential weld carries out heat convection, empty
Temperature rises；The air that blower fan is extracted between middle-temperature section cover body and middle-temperature section in circumferential weld by air inducing house steward, and middle-temperature section cover
Between body and middle-temperature section, the wall with middle-temperature section in extraction process of the air in circumferential weld carries out heat convection, and air themperature rises；
Step D: blower fan is admitted to ajutage bringing-up section after being mixed by the air of high temperature section induced duct and air inducing house steward extraction and enters one
Step heating, air themperature raises again；Wherein, the inner surface of ajutage bringing-up section is the most equally spaced is welded with gusset；
Step E: in ajutage bringing-up section, heated air sends into the air intlet of burner by pipeline, for the fire in combustor
Flame burning supply preheated air.
3. beneficial effect
Use the technical scheme that the present invention provides, compared with prior art, there is following remarkable result:
(1), existing by calcined by rotary kiln produce pellet process, the waste heat that after calcining, pellet itself carries account for input total heat
The 50% of amount, therefore reclaims the key point being to improve rotary kiln utilization rate of waste heat, the present invention to rotary kiln product waste heat
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system, the waste heat being based on pellet after high-temperature calcination is carried money
Source is fully reclaimed, and considers that the particular problem run into during pellet waste heat recovery designs simultaneously.In the present invention, first,
Air is divided into two-way, and a road air carries out heat convection at the wall of high temperature section, and it is right that another road air is carried out at the wall of middle-temperature section
Stream heat exchange, after two-way air absorbs heat, temperature control once raises, and mixes in blower fan；Wherein, air is divided into two-way respectively
Carry out heat convection at the wall of high temperature section and the wall of middle-temperature section, be conducive to improving efficiency and the reliability of air heat-exchange.Blower fan
The hot-air of interior mixing is admitted to ajutage bringing-up section, and by post bake in ajutage bringing-up section, the heat after post bake is empty
Pneumatic transmission enters the air intlet of burner, supplies preheated air for the flame combustion in combustor, improves efficiency of combustion and the combustion of fuel
Burn temperature (ignition temperature improves more than 100 DEG C)；In the present invention, by annular septate heat transfer mechanism and ajutage heat exchange mechanisms
Add hot-air at twice, add the waste heat recovery volume of rotary kiln product, substantially increase rotary kiln utilization rate of waste heat.
(2), the pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present invention and method, by twice quilt of air
The process of heating, has fully absorbed the waste heat that after calcining, pellet itself is entrained, and pellet is temperature after the discharging opening of cooling cylinder is discharged
It is greatly reduced, it is not necessary to use or only need to use cooling water that cooling cylinder is carried out spraying cooling on a small quantity, decrease the consumption of cooling water,
Be conducive to the saving of water resource, decrease the probability that cooling device is corroded, it is to avoid degradation manipulation environment occur in a large amount of vapourss
The generation of phenomenon, improves operating environment.
(3), the pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present invention, increase a set of in cutting agency
Easy Taw crushing apparatus, it is possible to reduce the existence of caking in pellet, it is to avoid the impact to ajutage bringing-up section of the pellet of caking
Destruction and the abrasion to the equipment of production；And pellet is all broken for short grained pellet by Hubei Province formula breaker, it is ensured that pellet exists
Flowing down smoothly in cutting agency, adds the most fully heat radiation in ajutage bringing-up section of the qualification rate of product, beneficially pellet,
Improve the efficiency of pellet waste heat recovery.
(4), in the present invention, the pellet of cooling cylinder inner bottom is along with the rotation of cooling cylinder, the dispersion of cooled cylinder inner bottom
Bar is gathered, and the pellet gathered free-falling when rotating to cooling cylinder inner tip, once more by scattering rod after pellet free-falling
Gather then free-falling, reciprocal with this, until pellet is discharged from cooling cylinder discharging opening；Pellet is taken up to highest point by scattering rod
The most fully heat radiation of the process then fallen, beneficially pellet, extends pellet residence time in cooling cylinder simultaneously, carries
The high efficiency of pellet waste heat recovery.
(5), the pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present invention, the inner surface of ajutage bringing-up section
It is welded with gusset the most equally spacedly, arranging on the one hand for increasing the heat exchange area of air and ajutage bringing-up section of gusset,
Improve the efficiency of pellet waste heat recovery；On the other hand can reduce the flexural deformation of ajutage bringing-up section, improve ajutage bringing-up section
Intensity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present invention；
Fig. 2 is middle-temperature section cover body cross-sectional view radially in the present invention；
Fig. 3 is the plan structure schematic diagram of middle-temperature section cover body in the present invention；
Fig. 4 is the structural representation of cutting agency in the present invention；
Fig. 5 is ajutage bringing-up section cross-sectional view radially in the present invention.
Label declaration in schematic diagram: 1, burner；2, combustor；3, rotary kiln；4, blower fan；501, air inducing house steward；502、
High temperature section induced duct；601, ajutage soaking zone；602, ajutage bringing-up section；6021, gusset；7, spray equipment；8、
Discharging opening；9, cutting agency；901, chute；902, fixed jaw；903, dynamic jaw；904, cam；10, high temperature section cover body；
11, cooling cylinder bearing block；12, connecting bolt；13, connecting plate；14, middle-temperature section cover body；1401, cover body expanding reach；15、
Cooling cylinder driving wheel；16, cooling cylinder；1601, scattering rod.
Detailed description of the invention
For further appreciating that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
As it is shown in figure 1, the pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment, including burner 1,
Combustor 2, rotary kiln 3, discharging opening 8, cooling cylinder bearing block 11, cooling cylinder driving wheel 15 and cooling cylinder 16.Burner 1 exists
Producing combustion flame in combustor 2, the high-temperature flue gas that combustion flame produces enters the pellet in rotary kiln 3 calcination rotary kiln 3,
Pellet after calcining flows out the charging aperture arriving cooling cylinder 16 from discharging opening 8.Described cooling cylinder bearing block 11 has two, cooling
Cylinder 16 is installed on the cooling cylinder bearing block 11 of two differing heights obliquely, near the cooling cylinder bearing of cooling cylinder 16 charging aperture
Its height of seat 11 is higher than the cooling cylinder bearing block 11 near cooling cylinder 16 discharging opening, so that at cooling cylinder 16 charging aperture
Highly higher than the height of cooling cylinder 16 discharge outlet.Cooling cylinder driving wheel 15 and cooling cylinder 16 gear drive, cooling cylinder driving wheel
15 drive cooling cylinder 16 to rotate, and the pellet in cooling cylinder 16 moves along with the discharging opening to cooling cylinder 16 that rotates of cooling cylinder 16.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment, also include annular septate heat transfer mechanism,
Ajutage heat exchange mechanisms and cutting agency 9.Cooling cylinder 16 is along cooling cylinder 16 charging aperture to the direction of cooling cylinder 16 discharging opening successively
It is divided into three sections, is called high temperature section, middle-temperature section and low-temperature zone.Annular septate heat transfer mechanism include blower fan 4, air inducing house steward 501,
High temperature section induced duct 502, high temperature section cover body 10 and middle-temperature section cover body 14.Blower fan 4 is negative-pressure air fan, and the inlet scoop of blower fan 4 is used
In drawing extraneous air, the air outlet of blower fan 4 is discharged for the air that will draw.High temperature section cover body 10 and middle-temperature section cover body
14 cylinders being both ends open.The internal diameter of high temperature section cover body 10 and middle-temperature section cover body 14 is all higher than the external diameter of cooling cylinder 16,
High temperature section cover body 10 is enclosed within described high temperature section, and middle-temperature section cover body 14 is enclosed within described middle-temperature section.High temperature section induced duct 502
Entrance point is connected with the centre position of high temperature section cover body 10 side, the port of export of high temperature section induced duct 502 and air inducing house steward 501
Side be connected.The entrance point of air inducing house steward 501 is connected with the centre position of middle-temperature section cover body 14 side, air inducing house steward
The port of export of 501 is connected with the inlet scoop of blower fan 4.Middle-temperature section cover body 14 includes middle-temperature section upper outlet body and middle-temperature section lower cover,
Middle-temperature section upper outlet body and middle-temperature section lower cover are semi-cylindrical shaped, on the side end face of middle-temperature section upper outlet body and the side of middle-temperature section lower cover
All be fixed with connecting plate 13 on end face, connecting plate on middle-temperature section upper outlet body side end face 13 with on middle-temperature section lower cover side end face
Connecting plate 13 cooperates and passes through connecting bolt 12 fixing seal together.The structure of high temperature section cover body 10 and middle-temperature section cover body
The structure of 14 is identical.
In the present embodiment, if middle-temperature section cover body 14 is straight cylindrical, then when blower fan 4 aspirate middle-temperature section cover body 14 and middle-temperature section it
Between air in circumferential weld time, two strands of air-flows at circumferential weld two ends converge at air inducing house steward 501 entrance point, air inducing house steward 501 entrance point
Just to circumferential weld at can form short-circuited region, the air of this short-circuited region is nearly at resting state, greatly reduce air with in
The heat transfer effect of temperature section wall, it is difficult to realize effective heat exchange of air and middle-temperature section wall；If will be with air inducing house steward 501 entrance point
Middle-temperature section cover body 14 internal diameter of junction expands, now, the gas at circumferential weld two ends arrive air inducing house steward 501 import rectify to ring
There will be a certain degree of flow perturbation time at seam, make air flow into air inducing house steward 501 along middle-temperature section wall, greatly strengthen
Air and the heat transfer effect of middle-temperature section wall, improve the efficiency of heat recovery.If high temperature section cover body 10 is straight cylindrical, then same
Reason.Therefore, as it is shown on figure 3, middle position is referred to as cover body expanding reach 1401 on middle-temperature section cover body 14, this cover body expanding reach
The internal diameter of 1401 is more than the internal diameter at both sides, centre position on middle-temperature section cover body 14.On high temperature section cover body 10, middle position is referred to as
High temperature section cover body expanding reach, the internal diameter of this high temperature section cover body expanding reach is more than the internal diameter at both sides, centre position on high temperature section cover body 10
(high temperature section cover body expanding reach omits in FIG, not shown).
Ajutage heat exchange mechanisms includes that ajutage, ajutage include ajutage soaking zone 601 and ajutage bringing-up section 602.Air-supply
The entrance point of pipe soaking zone 601 is connected with the air outlet of blower fan 4, and the port of export of ajutage soaking zone 601 heats with ajutage
The entrance point of section 602 is connected, and the outer surface of ajutage soaking zone 601 uses thermal insulation material parcel, the insulation in the present embodiment
Material is heat-preservation cotton, in order to be incubated ajutage soaking zone 601, reduces the loss of heat.Ajutage bringing-up section 602 sets
In the inside of cooling cylinder 16, the port of export of ajutage bringing-up section 602 stretches out the charging aperture of cooling cylinder 16, ajutage bringing-up section 602
The port of export be connected by the air intlet of pipeline with burner 1.As it is shown in figure 5, the inner surface edge of ajutage bringing-up section 602
Circumference is welded with gusset 6021 equally spacedly, and the quantity of gusset 6021 is 10～20 pieces, gusset 6021 in concrete the present embodiment
Quantity be 10 pieces；The height of every piece of gusset 6021 is 30～80mm, the height of every piece of gusset 6021 in concrete the present embodiment
For 30mm, gusset 6,021 1 aspect is used for increasing heat exchange area, on the other hand can reduce the bending of ajutage bringing-up section 602
Deformation；The manufacture method of ajutage bringing-up section 602 is first to weld corresponding gusset 6021 on one piece of rectangular slab, then rolls into
Pipe.As in figure 2 it is shown, the inner surface of cooling cylinder 16 is welded with scattering rod 1601 the most equally spacedly, scattering rod 1601 is L
Shape, one end of scattering rod 1601 is welded in the inner surface of cooling cylinder 16；The company of the other end opening direction of all scattering rods 1601
Line is identical with the direction of rotation of cooling cylinder 16, and so design is easy to scattering rod 1601 and is taken up cold in the rotary course of cooling cylinder 16
But the pellet in cylinder 16.
As shown in Figure 4, cutting agency 9 is located between discharging opening 8 and cooling cylinder 16 charging aperture, and cutting agency 9 includes chute
901, fixed jaw 902, dynamic jaw 903 and cam 904, fixed jaw 902 is L-shaped, and fixed jaw 902 is fixed on chute 901
The side in portion, the upper end of dynamic jaw 903 is fixed on side and the medial surface of dynamic jaw 903 on chute 901 top by a rotary shaft
Relative with fixed jaw 902.Cam 904 is located at the lower section of dynamic jaw 903 and cam 904 contacts with the lateral surface of dynamic jaw 903.
Being fixed with rotating shaft on the center of rotation of cam 904, this rotating shaft is connected with the output shaft of frequency conversion motor, and dynamic jaw 903 is by cam 904
Rotation and swing.Fixed jaw 902, dynamic jaw 903 and cam 904 collectively form easy Taw crushing apparatus.Chute
901, fixed jaw 902, dynamic jaw 903 and cam 904 all use the maximum operating temperature heat resisting steel more than 900 DEG C to make, this reality
Executing the heat resisting steel in example is to bear less than the 1000 DEG C oxidation resistant steel 0Cr25Ni20 repeatedly heated.The swing frequency of dynamic jaw 903
Rate is 2～5 times/second, and in concrete the present embodiment, the hunting frequency of dynamic jaw 903 is 2 times/second, and hunting frequency is by with cam 904 even
The frequency conversion motor connect controls；By controlling curvature and the installation site thereof of cam 904, make dynamic jaw 903 in jaw 903 swing process
And the distance controlling between fixed jaw 902 is 20～50mm, dynamic between jaw 903 and fixed jaw 902 in concrete the present embodiment
Distance controlling, at 20mm, so arranges and can ensure that while broken caking pellet little granule pellet flows down smoothly.
The axis of high temperature section cover body 10 overlaps with the axis of high temperature section, in the axis of middle-temperature section cover body 14 and middle-temperature section
Dead in line.A length of the 1500 of high temperature section cover body 10～2000mm, the present embodiment takes 2000mm；Middle-temperature section cover body
A length of the 3000 of 14～4500mm, the present embodiment takes 4400mm；High temperature section cover body expanding reach on high temperature section cover body 10
Internal diameter at both sides, more than the external diameter 20～100mm of cooling cylinder 16, takes 20mm in the present embodiment；Middle-temperature section cover body 14 upper cover
Internal diameter at body expanding reach 1401 both sides, more than the external diameter 20～100mm of cooling cylinder 16, takes 20mm in the present embodiment；Cover body
The internal diameter of expanding reach 1401 is more than the internal diameter 20 at middle-temperature section cover body 14 upper outlet body expanding reach 1401 both sides～200mm, this reality
Execute and example takes 20mm；The internal diameter of high temperature section cover body expanding reach more than high temperature section cover body expanding reach both sides on high temperature section cover body 10 at
Internal diameter 20～200mm, takes 20mm in the present embodiment；A length of the 200 of cover body expanding reach 1401～1500mm, this reality
Execute and example takes 200mm；A length of the 200～1500mm of high temperature section cover body expanding reach, take 200mm in the present embodiment；Draw
The internal diameter of wind house steward 501 and high temperature section induced duct 502 is 200～in 500mm, this enforcement, the internal diameter of air inducing house steward 501 is 300
Mm, the internal diameter of high temperature section induced duct 502 is 200mm；The internal diameter of ajutage soaking zone 601 and ajutage bringing-up section 602 is
150～500mm, in the present embodiment, the internal diameter of ajutage soaking zone 601 and ajutage bringing-up section 602 is 300mm；Consider
To the layout of cutting agency 9, the internal diameter of ajutage bringing-up section 602 port of export is reduced into 50～100mm, send in the present embodiment
The internal diameter of airduct bringing-up section 602 port of export is reduced into 50mm.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery method of the present embodiment, by preheated burning required air to forging
Burn product and carry out heat recovery, mainly include the following steps that,
Step A: after calcining, temperature is the high temperature pellet of 800～900 DEG C in rotary kiln 3, flows out from discharging opening 8, passes through
Cutting agency 9 enters the charging aperture of cooling cylinder 16.Wherein, cutting agency 9 passes through the Taw crushing apparatus pellet to caking
Crushing, the hunting frequency of dynamic jaw 903 is 2 times/second, dynamic between jaw 903 and fixed jaw 902 in dynamic jaw 903 swing process
Distance controlling at 20mm；
Step B: cooling cylinder driving wheel 15 drives cooling cylinder 16 to rotate, makes the pellet at cooling cylinder 16 charging aperture be transported to cold
But cylinder 16 discharging opening.Pellet is heating wall and the ajutage of cooling cylinder 16 by the way of radiation and heat conduction in cooling cylinder 16
The wall of bringing-up section 602.On cooling cylinder 16, the wall mean temperature of high temperature section is 550 DEG C, the wall mean temperature of middle-temperature section
Being 400 DEG C, the wall mean temperature of low-temperature zone is 150 DEG C.Wherein, as in figure 2 it is shown, the grain of cooling cylinder 16 inner bottom
Expect that, along with the rotation of cooling cylinder 16, the scattering rod 1601 of cooled cylinder 16 inner bottom is gathered, and the pellet gathered is rotating to cold
But free-falling during cylinder 16 inner tip, is gathered then free-falling by scattering rod 1601 after pellet free-falling once more, with
This is reciprocal, until pellet is discharged from cooling cylinder 16 discharging opening.The mistake then fallen to highest point taken up by pellet by scattering rod 1601
The most fully heat radiation of journey, beneficially pellet, extends pellet residence time in cooling cylinder 16 simultaneously, improves more than pellet
The efficiency of recuperation of heat；But, pellet dropping process can impact ajutage bringing-up section 602, the impact that short grained pellet produces
Affect less, and if pellet exists big caking, then lump and the impact of ajutage bringing-up section 602 will be greatly reduced it
Service life.For solving this problem in the present embodiment, cutting agency 9 devises a set of simple Hubei Province formula breaker, its
Purpose is to reduce the existence of caking in pellet, it is to avoid the impact failure to ajutage bringing-up section 602 of the pellet of caking；And Hubei Province
Pellet is all broken for short grained pellet, beneficially pellet and the most fully dispels the heat in ajutage bringing-up section 602 by formula breaker,
Improve the efficiency of pellet waste heat recovery.
Step C: opening blower fan 4, blower fan 4 is by ring between high temperature section induced duct 502 extracting high-temperature section cover body 10 and high temperature section
Air in seam, the air in surrounding is continuously replenished in the circumferential weld entered between high temperature section cover body 10 and high temperature section, and high
Between temperature section cover body 10 and high temperature section, the wall with high temperature section in extraction process of the air in circumferential weld carries out heat convection, takes away one
Partial heat, now air themperature raises.Blower fan 4 extracts ring between middle-temperature section cover body 14 and middle-temperature section by air inducing house steward 501
Air in seam, the air in surrounding is continuously replenished in the circumferential weld entered between middle-temperature section cover body 14 and middle-temperature section, and in
Between temperature section cover body 14 and middle-temperature section, the wall with middle-temperature section in extraction process of the air in circumferential weld carries out heat convection, takes away one
Partial heat, now air themperature raises.
In the present embodiment, the internal diameter taking cooling cylinder 16 is 800mm, and the internal diameter of high temperature section cover body 10 is 820mm, i.e. high temperature
Between section cover body 10 and high temperature section, the thickness of circumferential weld is 10mm, a length of 2000mm of high temperature section cover body 10；Middle-temperature section cover
The internal diameter of body 14 is 820mm, a length of 4400mm.The air mass flow needed when the burning of burner 1 flame is 2500m3/h
Time, power and flow valve by regulation blower fan 4 (are equipped with flow valve on air inducing house steward 501 and high temperature section induced duct 502
Door), the air capacity controlling to draw in the circumferential weld between high temperature section cover body 10 and high temperature section is 1000m3/ h, from middle-temperature section cover body
The air capacity drawn in circumferential weld between 14 and middle-temperature section is 1500m3/h。
The following is air to calculate with the heat exchange of generation in middle-temperature section cover body 14 in high temperature section cover body 10:
Heat exchange amount: Q=k s Δ t
In formula: k--integrated heat transfer coefficient, take k=20W/m2K；
S--heat exchange area, m2；
The Δ t--temperature difference, K.
Air temperature rise:
In formula: Q--heat exchange amount, kW；
Cp--air specific volume, take Cp=1.005kJ/kgK；
ρ--atmospheric density, takes ρ=1.1kg/m3；
V--volume flow, m3/s
1., in high temperature section cover body 10: taking inlet air temp is 30 DEG C, if air exit temp is 175 DEG C；
Q=20 × π × 0.8 × 1 × (550+550-30-175)/2
=20 × 2.512 × 447.5
=22.48KW
So air themperature raises 146 DEG C in high temperature section cover body 10, i.e. air exit temp is 176 DEG C, basic with hypothesis
Unanimously, requirement is met.
2., in middle-temperature section cover body 14: taking inlet air temp is 30 DEG C, if air exit temp is 175 DEG C；
Q=20 × π × 0.8 × 2.2 × (400+400-30-175)/2
=20 × 5.53 × 297.5
=32.9KW
So air themperature raises 143 DEG C in middle-temperature section cover body 14, i.e. air exit temp is 173 DEG C, basic with hypothesis
Unanimously, requirement is met.
Through above-mentioned calculating, after air occurs heat exchange for the first time in high temperature section cover body 10 and in middle-temperature section cover body 14, temperature all rises
Up to 175 DEG C.
Step D: blower fan 4 is admitted to air-supply after being mixed by the hot-air of high temperature section induced duct 502 and air inducing house steward 501 extraction
Pipe bringing-up section 602, hot-air inwall with ajutage bringing-up section 602 in ajutage bringing-up section 602 carries out convection current and radiation is changed
Heat, air is raised again by post bake, air themperature.As it is shown in figure 5, the inner surface of ajutage bringing-up section 602 is circumferentially
The equally spaced gusset 6021 that is welded with, the heat exchange area being arranged to add to air and ajutage bringing-up section 602 of gusset 6021
With the intensity of raising ajutage bringing-up section 602, in the present embodiment, the setting of gusset 6021 makes air and ajutage bringing-up section 602
Heat exchange area double.Air flow direction in sending into ajutage bringing-up section 602 and the conveying of pellet in cooling cylinder 16
In opposite direction, be conducive to improving air heat exchange efficiency in ajutage bringing-up section 602.
In the present embodiment, the internal diameter fetching and delivering airduct bringing-up section 602 is 300mm, a length of 10000mm；Fetch and deliver airduct heating
The wall surface temperature of section 602 entrance points is 200 DEG C, and the wall surface temperature of ajutage bringing-up section 602 port of export is 800 DEG C, if air
It it is 300 DEG C by the outlet temperature after post bake in ajutage bringing-up section 602.
Q=20 × π × 0.3 × 10 × 2 × (200+800-175-300)/2
=20 × 18.84 × 262.5
=98.91KW
So air themperature raises 128 DEG C in ajutage bringing-up section 602, i.e. air exit temp is 303 DEG C, with hypothesis base
This is consistent, meets requirement.
Step E: according to above-mentioned calculating, being sent by pipeline to the air of 300 DEG C by post bake in ajutage bringing-up section 602
Enter the air intlet of burner 1, supply preheated air for the flame combustion in combustor 2, it is possible to increase the efficiency of combustion of fuel and
Ignition temperature.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment, increases a set of letter in cutting agency 9
Easy Taw crushing apparatus, it is possible to reduce the existence of caking in pellet, it is to avoid the pellet of caking rushes ajutage bringing-up section 602
Break up bad and to the equipment of production abrasion；And pellet is all broken for short grained pellet by Hubei Province formula breaker, it is ensured that pellet
Flowing down smoothly in cutting agency 9, adds the qualification rate of product, beneficially pellet uniform in ajutage bringing-up section 602
Fully heat radiation, improves the efficiency of pellet waste heat recovery.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment, the inner surface of ajutage bringing-up section 602
It is welded with gusset 6021 the most equally spacedly, arranging on the one hand for increasing air and ajutage bringing-up section 602 of gusset 6021
Heat exchange area, improve pellet waste heat recovery efficiency；On the other hand the flexural deformation of ajutage bringing-up section 602 can be reduced,
Improve the intensity of ajutage bringing-up section 602.
The existing process being produced pellet by calcined by rotary kiln, the waste heat that after calcining, pellet itself carries accounts for total heat input
50%, therefore rotary kiln product waste heat is reclaimed the key point being to improve rotary kiln utilization rate of waste heat, the present embodiment
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system, is based on the residual heat resources carrying pellet after high-temperature calcination
Fully reclaim, consider that the particular problem run into during pellet waste heat recovery designs simultaneously.In the present embodiment, first,
Air is divided into two-way, and a road air carries out heat convection at the wall of high temperature section, and it is right that another road air is carried out at the wall of middle-temperature section
Stream heat exchange, after two-way air absorbs heat, temperature control once raises, and mixes in blower fan 4；Wherein, air is divided into two-way and divides
Do not carry out heat convection at the wall of high temperature section and the wall of middle-temperature section, be conducive to the efficiency improving air heat-exchange (because of high temperature section
Wall surface temperature different with the wall surface temperature of middle-temperature section, air is divided into two-way and carries out the heat transfer effect of heat convection respectively compared to one
Road air directly carries out the mode of heat convection, and heat transfer effect is more preferable, heat exchange in hgher efficiency) and reliability.Mix in blower fan 4
The hot-air closed is admitted to ajutage bringing-up section 602, and by post bake in ajutage bringing-up section 602, after post bake
Hot-air sends into the air intlet of burner 1, supplies preheated air for the flame combustion in combustor 2, improves the burning of fuel
Efficiency and ignition temperature (ignition temperature improves more than 100 DEG C)；In the present embodiment, by annular septate heat transfer mechanism and air-supply
Pipe heat exchange mechanisms adds hot-air at twice, adds the waste heat recovery volume of rotary kiln product, substantially increases rotary kiln UTILIZATION OF VESIDUAL HEAT IN
Efficiency.
In the present embodiment, the pellet of cooling cylinder 16 inner bottom is along with the rotation of cooling cylinder 16, and be cooled cylinder 16 inner bottom
Scattering rod 1601 gather, the pellet gathered rotate to cooling cylinder 16 inner tip time free-falling, after pellet free-falling
Once more gathered then free-falling by scattering rod 1601, reciprocal with this, until pellet is discharged from cooling cylinder 16 discharging opening.Grain
Expect to be taken up by scattering rod 1601 the most fully heat radiation of the process then fallen to highest point, beneficially pellet, extend grain simultaneously
Material residence time in cooling cylinder 16, improves the efficiency of pellet waste heat recovery.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment and method, be heated for twice by air
Process, fully absorbed the waste heat that pellet itself after calcining is entrained, pellet temperature after the discharging opening discharge of cooling cylinder 16 is big
Big decline, it is not necessary to use or only need to use cooling water that cooling cylinder 16 is carried out spraying cooling on a small quantity, decrease the consumption of cooling water,
Be conducive to the saving of water resource, decrease the probability that cooling device is corroded, it is to avoid degradation manipulation environment occur in a large amount of vapourss
The generation of phenomenon, improves operating environment.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment and method, empty at blower fan 4 draw ambient
During gas, the flowing of air can carry out certain journey to cooling cylinder bearing block 11 and the cooling cylinder driving wheel 15 installed on cooling cylinder 16
The cooling of degree, thus reduce the consumption of lubricating oil on cooling cylinder bearing block 11 and disappearing of cooling cylinder driving wheel 15 gear lubricating oil
Consumption, and then add cooling cylinder bearing block 11 and the service life of cooling cylinder driving wheel 15；It addition, blower fan 4 draw ambient is empty
Gas can reduce the temperature of surrounding, improves operating environment.
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment, only does on the basis of existing equipment
Less change, improvement cost is relatively low, and Operation and maintenance are convenient；After being calcined by absorption, the waste heat of pellet itself produces preheating
Air, it is possible to reduce the usage amount of fuel, can be cost-effective hundreds thousand of to the up to a million units of production line every year.
Embodiment 2
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment is substantially the same manner as Example 1, and they are different
Part is: in order to ensure that pellet is sufficiently cooled below set point of temperature, is arranged over spray equipment 7 in low-temperature zone, should
Spray equipment 7 is cool water shower device, and spray equipment 7 includes the cooling water pipe uniformly opening circular hole on a row side, cools down water
Flow down from the circular hole of cooling water pipe side, be sprayed at the surface of low-temperature zone, low-temperature zone is lowered the temperature, make pellet by further
Cooling.
Embodiment 3
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment is substantially the same manner as Example 1, and they are different
Part is: the inner surface of ajutage bringing-up section 602 is welded with gusset 6021, muscle in concrete the present embodiment the most equally spacedly
The quantity of plate 6021 is 15 pieces, and the height of every piece of gusset 6021 is 55mm；In the present embodiment, the hunting frequency of dynamic jaw 903 is
3 times/second, in dynamic jaw 903 swing process, dynamic distance controlling between jaw 903 and fixed jaw 902 is at 35mm；High temperature section cover body
The a length of 1500mm of 10, a length of 3000mm of middle-temperature section cover body 14；On high temperature section cover body 10, high temperature section cover body expands
Internal diameter at section both sides more than the external diameter 60mm of cooling cylinder 16, interior at middle-temperature section cover body 14 upper outlet body expanding reach 1401 both sides
Footpath is more than the external diameter 60mm of cooling cylinder 16；The internal diameter of cover body expanding reach 1401 is more than middle-temperature section cover body 14 upper outlet body expanding reach
Internal diameter 110mm at 1401 both sides；The internal diameter of high temperature section cover body expanding reach expands more than high temperature section cover body on high temperature section cover body 10
Internal diameter 110mm at section both sides；The a length of 850mm of cover body expanding reach 1401；High temperature section cover body expanding reach a length of
850mm；In this enforcement, the internal diameter of air inducing house steward 501 is 400mm, and the internal diameter of high temperature section induced duct 502 is 300mm；Send
The internal diameter of airduct soaking zone 601 and ajutage bringing-up section 602 is 150mm；In the present embodiment, ajutage bringing-up section 602 exports
The internal diameter of end is reduced into 75mm.
Embodiment 4
The pellet calcination rotary kiln product waste heat annular dividing wall type recovery system of the present embodiment is substantially the same manner as Example 1, and they are different
Part is: the inner surface of ajutage bringing-up section 602 is welded with gusset 6021, muscle in concrete the present embodiment the most equally spacedly
The quantity of plate 6021 is 20 pieces, and the height of every piece of gusset 6021 is 80mm；In the present embodiment, the hunting frequency of dynamic jaw 903 is
5 times/second, in dynamic jaw 903 swing process, dynamic distance controlling between jaw 903 and fixed jaw 902 is at 50mm；High temperature section cover body
The a length of 1750mm of 10, a length of 3800mm of middle-temperature section cover body 14；On high temperature section cover body 10, high temperature section cover body expands
Internal diameter at section both sides is more than the external diameter 100mm of cooling cylinder 16, at middle-temperature section cover body 14 upper outlet body expanding reach 1401 both sides
Internal diameter is more than the external diameter 100mm of cooling cylinder 16；The internal diameter of cover body expanding reach 1401 expands more than middle-temperature section cover body 14 upper outlet body
Internal diameter 200mm at section 1401 both sides；The internal diameter of high temperature section cover body expanding reach expands more than high temperature section cover body on high temperature section cover body 10
Internal diameter 200mm at big section both sides；The a length of 1500mm of cover body expanding reach 1401；The length of high temperature section cover body expanding reach
For 1500mm；In this enforcement, the internal diameter of air inducing house steward 501 is 500mm, and the internal diameter of high temperature section induced duct 502 is 400mm；
The internal diameter of ajutage soaking zone 601 and ajutage bringing-up section 602 is 500mm；Ajutage bringing-up section 602 in the present embodiment
The internal diameter of the port of export is reduced into 100mm.
Schematically being described the present invention and embodiment thereof above, this description does not has restricted, shown in accompanying drawing yet
Simply one of embodiments of the present invention, actual structure is not limited thereto.So, if those of ordinary skill in the art
Enlightened by it, in the case of without departing from the invention objective, design the knot similar to this technical scheme without creative
Structure mode and embodiment, all should belong to protection scope of the present invention.
Claims (8)
1. a pellet calcination rotary kiln product waste heat annular dividing wall type recovery system, including burner (1), combustor (2), returns
Rotary kiln (3), discharging opening (8), cooling cylinder bearing block (11), cooling cylinder driving wheel (15) and cooling cylinder (16), described burning
Mouth (1) produces combustion flame, the pellet in calcination rotary kiln (3) in combustor (2)；Pellet after calcining is from discharging opening
(8) charging aperture of arrival cooling cylinder (16) is flowed out；Described cooling cylinder bearing block (11) has two, and cooling cylinder (16) tilts
Be installed on the cooling cylinder bearing block (11) of two differing heights so that the height at cooling cylinder (16) charging aperture is higher than cold
But the height of cylinder (16) discharge outlet；Cooling cylinder driving wheel (15) drives cooling cylinder (16) to rotate；It is characterized in that:
Also include annular septate heat transfer mechanism and ajutage heat exchange mechanisms；Described cooling cylinder (16) is along cooling cylinder (16) charging aperture
Direction to cooling cylinder (16) discharging opening is divided into three sections, is called high temperature section, middle-temperature section and low-temperature zone；
Described annular septate heat transfer mechanism includes blower fan (4), air inducing house steward (501), high temperature section induced duct (502), high temperature section
Cover body (10) and middle-temperature section cover body (14)；Described high temperature section cover body (10) and middle-temperature section cover body (14) are both ends open
Cylinder；The internal diameter of high temperature section cover body (10) and middle-temperature section cover body (14) is all higher than the external diameter of cooling cylinder (16)；High temperature section cover
Body (10) is enclosed within described high temperature section, and middle-temperature section cover body (14) is enclosed within described middle-temperature section；High temperature section induced duct (502)
Entrance point is connected with the centre position of high temperature section cover body (10) side, and the port of export of high temperature section induced duct (502) is total with air inducing
The side of pipe (501) is connected；The centre position phase of the entrance point of air inducing house steward (501) and middle-temperature section cover body (14) side
Connection, the port of export of air inducing house steward (501) is connected with the inlet scoop of blower fan (4)；
Described ajutage heat exchange mechanisms includes that ajutage, ajutage include ajutage soaking zone (601) and ajutage bringing-up section (602)；
The entrance point of described ajutage soaking zone (601) is connected with the air outlet of blower fan (4), going out of ajutage soaking zone (601)
Mouth end is connected with the entrance point of ajutage bringing-up section (602), and the outer surface of ajutage soaking zone (601) uses thermal insulation material
Parcel；Ajutage bringing-up section (602) is located at the inside of cooling cylinder (16), and the port of export of ajutage bringing-up section (602) stretches out
The charging aperture of cooling cylinder (16), the port of export of ajutage bringing-up section (602) is by the air intlet phase of pipeline with burner (1)
Connection；
The upper middle position of described middle-temperature section cover body (14) is referred to as cover body expanding reach (1401), this cover body expanding reach (1401)
Internal diameter is more than the internal diameter at the upper both sides, centre position of middle-temperature section cover body (14)；
The upper middle position of described high temperature section cover body (10) is referred to as high temperature section cover body expanding reach, this high temperature section cover body expanding reach interior
Footpath is more than the internal diameter at the upper both sides, centre position of high temperature section cover body (10)；
The inner surface of described ajutage bringing-up section (602) is welded with gusset (6021) the most equally spacedly；Described cooling cylinder (16)
Inner surface be welded with scattering rod (1601) the most equally spacedly；Described scattering rod (1601) is L-shaped, scattering rod (1601)
One end be welded in the inner surface of cooling cylinder (16).
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system the most according to claim 1, it is characterised in that:
Also include the cutting agency (9) being located between discharging opening (8) and cooling cylinder (16) charging aperture, described cutting agency (9)
Including chute (901), fixed jaw (902), dynamic jaw (903) and cam (904), fixed jaw (902) is L-shaped, fixing
Jaw (902) is fixed on the side on chute (901) top, and the upper end of dynamic jaw (903) is fixed on chute (901) by a rotary shaft
The side on top and the medial surface of dynamic jaw (903) are relative with fixed jaw (902)；Described cam (904) is located at dynamic jaw (903)
Lower section and cam (904) contact with the lateral surface of dynamic jaw (903)；It is fixed with rotating shaft on the center of rotation of cam (904),
This rotating shaft is connected with the output shaft of frequency conversion motor, and dynamic jaw (903) is swung by the rotation of cam (904).
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system the most according to claim 1, it is characterised in that:
Described middle-temperature section cover body (14) includes that middle-temperature section upper outlet body and middle-temperature section lower cover, middle-temperature section upper outlet body and middle-temperature section lower cover are equal
For semi-cylindrical shaped, on the side end face of middle-temperature section upper outlet body and on the side end face of middle-temperature section lower cover, all it is fixed with connecting plate (13), in
Connecting plate (13) on temperature section upper outlet body side end face cooperates with the connecting plate (13) on middle-temperature section lower cover side end face and logical
Cross connecting bolt (12) to be fixed together；
The structure of described high temperature section cover body (10) is identical with the structure of middle-temperature section cover body (14).
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system the most according to claim 2, it is characterised in that:
Described chute (901), fixed jaw (902), dynamic jaw (903) and cam (904) all use heat resisting steel to make；
In dynamic jaw (903) swing process, dynamic distance controlling between jaw (903) and fixed jaw (902) is 20～50mm；
The outer surface of ajutage soaking zone (601) uses heat-preservation cotton parcel.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system the most according to claim 1, it is characterised in that:
The axis of described high temperature section cover body (10) overlaps with the axis of high temperature section, the axis of middle-temperature section cover body (14) with
The axis of middle-temperature section overlaps；A length of the 1500～2000mm of high temperature section cover body (10), the length of middle-temperature section cover body (14)
Degree is 3000～4500mm；Internal diameter at the upper high temperature section cover body expanding reach both sides of high temperature section cover body (10) is more than cooling cylinder (16)
External diameter 20～100mm, the internal diameter at middle-temperature section cover body (14) upper outlet body expanding reach (1401) both sides be more than cooling cylinder (16)
External diameter 20～100mm；The internal diameter of cover body expanding reach (1401) is more than middle-temperature section cover body (14) upper outlet body expanding reach (1401)
Internal diameter 20～200mm at both sides, the internal diameter of high temperature section cover body expanding reach expands more than the upper high temperature section cover body of high temperature section cover body (10)
Internal diameter 20～200mm at big section both sides；A length of the 200～1500mm of cover body expanding reach (1401), high temperature section cover body
A length of the 200 of expanding reach～1500mm；The internal diameter of air inducing house steward (501) and high temperature section induced duct (502) is 200～500
mm；The internal diameter of ajutage soaking zone (601) and ajutage bringing-up section (602) is 150～500mm, ajutage bringing-up section (602)
The internal diameter of the port of export is reduced into 50～100mm.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system the most according to claim 1, it is characterised in that:
The quantity of described gusset (6021) is 10～20 pieces, and the height of every piece of gusset (6021) is 30～80mm.
Pellet calcination rotary kiln product waste heat annular dividing wall type recovery system the most according to claim 1 and 2, its feature exists
It is arranged over spray equipment (7) in: described low-temperature zone.
8. a pellet calcination rotary kiln product waste heat annular dividing wall type recovery method, it is characterised in that: comprise the following steps,
Step A: after calcining, temperature is the pellet of 800～900 DEG C in rotary kiln (3), flows out from discharging opening (8), warp
Cross cutting agency (9) and enter the charging aperture of cooling cylinder (16)；Wherein, pellet realizes broken in cutting agency (9), dynamic
The hunting frequency of jaw (903) is 2～5 times/second, dynamic jaw (903) and fixed jaw (902) in dynamic jaw (903) swing process
Between distance controlling 20～50mm；
Step B: cooling cylinder driving wheel (15) drives cooling cylinder (16) to rotate, and makes the pellet at cooling cylinder (16) charging aperture
It is transported to cooling cylinder (16) discharging opening；Pellet heats cooling cylinder (16) and ajutage bringing-up section in cooling cylinder (16)
(602), the wall mean temperature of the upper high temperature section of cooling cylinder (16) is 550 DEG C, and the wall mean temperature of middle-temperature section is 400 DEG C,
The wall mean temperature of low-temperature zone is 150 DEG C；Wherein, the pellet of cooling cylinder (16) inner bottom is along with cooling cylinder (16)
Rotating, the scattering rod (1601) of cooled cylinder (16) inner bottom is gathered, and the pellet gathered is rotating to cooling cylinder (16)
Free-falling during inner tip, is gathered then free-falling by scattering rod (1601) after pellet free-falling once more, past with this
It is multiple, until pellet is discharged from cooling cylinder (16) discharging opening；
Step C: open blower fan (4), blower fan (4) by high temperature section induced duct (502) extracting high-temperature section cover body (10) with
Between air in circumferential weld between high temperature section, and high temperature section cover body (10) and high temperature section, the air in circumferential weld is in extraction process
Carrying out heat convection with the wall of high temperature section, air themperature rises；Blower fan (4) extracts middle-temperature section by air inducing house steward (501)
Air in circumferential weld between air in circumferential weld, and middle-temperature section cover body (14) and middle-temperature section between cover body (14) and middle-temperature section
In extraction process, the wall with middle-temperature section carries out heat convection, and air themperature rises；
Step D: blower fan (4) is sent after being mixed by the air that high temperature section induced duct (502) and air inducing house steward (501) extract
Entering ajutage bringing-up section (602) to heat further, air themperature raises again；Wherein, ajutage bringing-up section (602) is interior
Surface is the most equally spaced is welded with gusset (6021)；
Step E: in ajutage bringing-up section (602), heated air sends into the air intlet of burner (1) by pipeline, for
Flame combustion supply preheated air in combustor (2).
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| CN201510437312.3A CN104964572B (en) | 2015-07-22 | 2015-07-22 | A kind of pellet calcination rotary kiln product waste heat annular dividing wall type recovery system and method |
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| CN105910414B (en) * | 2015-11-27 | 2018-10-09 | 湖南鼎玖能源环境科技有限公司 | A kind of rotary drying equipment and drying process |
| CN106000521B (en) * | 2016-06-15 | 2018-05-04 | 广东恒生源环保科技有限公司 | A kind of building rubbish treatment device |
| CN106440770B (en) * | 2016-08-29 | 2019-03-19 | 洛阳堆金环保设备有限公司 | Roasted molybdenum oxide rotary kiln with waste heat utilization system |
| CN109141047A (en) * | 2018-08-30 | 2019-01-04 | 山东金璞新材料有限公司 | A kind of rotary kiln sintered and cooling system utilization method of heat |
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| JP2006029667A (en) * | 2004-07-15 | 2006-02-02 | Kogure Seisakusho:Kk | Shell cooling device and shell cooling method for rotary kiln, and exhaust heat recovery method for rotary kiln |
| CN1945184A (en) * | 2006-10-26 | 2007-04-11 | 南京圣火水泥新技术工程有限公司 | Zero discharging system for cement kiln clinker cooling machine waste gas |
| CN101196370B (en) * | 2006-12-08 | 2010-05-26 | 洛阳中合祥水泥有限公司 | Novel combined cement clinker roasted and waste heat generation system and technique |
| CN201740412U (en) * | 2010-08-20 | 2011-02-09 | 三门峡市新仰韶合成料有限公司 | Rotary kiln cooler residual-heat utilizing device |
| CN202482227U (en) * | 2012-03-10 | 2012-10-10 | 泰安中意粉体热工研究院 | Energy conservation and emission reduction type production device for active lime |
| CN203824299U (en) * | 2014-04-04 | 2014-09-10 | 贵州鑫益能陶粒支撑剂有限公司 | Waste-heat utilization structure of rotary kiln and rotary kiln production system |
| CN204757719U (en) * | 2015-07-22 | 2015-11-11 | 安徽工业大学 | Wall type recovery system between rotary kiln product waste heat annular is calcined to aggregate |
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