CN107449286A - A kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery method - Google Patents
A kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery method Download PDFInfo
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- CN107449286A CN107449286A CN201710699806.8A CN201710699806A CN107449286A CN 107449286 A CN107449286 A CN 107449286A CN 201710699806 A CN201710699806 A CN 201710699806A CN 107449286 A CN107449286 A CN 107449286A
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- air
- induced duct
- rotary kiln
- waste heat
- cooling cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Processing Of Solid Wastes (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery method, belong to rotary kiln product heat recovery technology field.The present invention comprises the following steps, Step 1: open blower fan and cyclone dust collectors, air is inhaled into inside cooling cylinder from the charging aperture and discharging opening at cooling cylinder both ends respectively, carried out into the air inside cooling cylinder and pellet surface after heat convection is heated, then induced duct wind inlet section is entered by horizontal air inlet and lower air inlet；Step 2: the hot-air into induced duct wind inlet section is inhaled into blower fan by induced duct soaking zone, and cyclone dust collectors are blasted by blower fan and carry out dust separation；Step 3: the hot-air after dust separation enters the air intake of burner by deduster discharge pipe, preheated air is provided for the flame combustion of burner.The present invention, which realizes, improves pellet calcination rotary kiln utilization rate of waste heat, lifting pellet cooling effect, saving water resource, protection cooling device, the function of improving operating environment and air quality.
Description
Present patent application is to be directed to Application No.：2015104380589 divisional application, the applying date of original application
For：2015-07-22, invention and created name are：A kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery system.
Technical field
The present invention relates to rotary kiln product heat recovery technology field, calcines and turns round more specifically to a kind of pellet
Kiln product waste heat direct absorbing type recovery method.
Background technology
Calcined by rotary kiln is the main technique for producing bioceramic filtrate, and it is that the raw material of filtrate production (is glued that it, which is acted on,
Spherical particle made of soil and flyash) dried and sintering processes, wherein, drying section is excluding contained by ceramic filter material
Moisture, sintering stage make filtrate bead reach intensity and hardness requirement needed for commercial Application by calcining.
In existing bioceramic filtrate production technology, using the rotary kiln calciner main as its.Burning system
System feeds heat in rotary kiln in the form of high-temperature flue gas, and heating and calcining is carried out to the ceramic filter material of reverse flow.Completion is forged
The ceramic filter material of burning process is discharged from kiln hood chute at high operating temperatures, is cooled down into cooling cylinder.In order to strengthen cooling effect, lead to
Cool water shower often is carried out in cooling drum outer wall, the heat stored in rear ceramic filter material is forged to take away high temperature, reaches reduction ceramics
The purpose of filtrate temperature.The cooling water being heated after spray is flowed into storage cistern and recycled.But above-mentioned bioceramic filtrate
Production technology has the shortcomings that following several respects：(1), the residual heat resources quilt that the pellet after high-temperature calcination (i.e. ceramic filter material) carries
Waste completely, run counter to the recycling economy principle of energy-saving and emission-reduction；And spraying cooling mode is that high-temperature calcination product is carried out indirectly
Cooling, cooling effectiveness is low, cooling effect is poor；(2), during cool water shower, a large amount of cooling waters are changed into steam and lost, cold
But 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) it is, long-term
The spray of cooling water, severe oxidation have corroded cooling device, add overhaul of the equipments and the cost safeguarded；(4), spray for a long time cold
But process generates a large amount of vapours in surrounding environment, is degrading operating environment；(5), the air largely with solid dust particle
As pellet is from the discharge of cooling cylinder discharging opening, surrounding air is polluted, reduces air quality.
For dispersed heat in recovery pellet production process, have related technical scheme in the prior art and disclose, such as
Patent publication No.：The U of CN 203824299, publication date：On 09 10th, 2014, invention and created name was：Rotary kiln UTILIZATION OF VESIDUAL HEAT IN
Structure and rotary kiln production system, this application case disclose a kind of rotary kiln waste heat utilization structure and rotary kiln production system, return
Rotary kiln waste heat utilization structure include connection rotary kiln with cool down kiln rotary kiln discharging pipeline, combustion-supporting gas pipeline and with revolution
The fuel gas pipeline of kiln connection, combustion-supporting gas pipeline extends past in rotary kiln discharging pipeline and is connected to rotary kiln, that can incite somebody to action
Combustion-supporting gas is fed in rotary kiln.After combustion-supporting gas is heated in rotary kiln discharging pipeline using the waste heat of rotary kiln,
Rotary kiln is passed through again, so as to reduce the consumption of combustion gas.Meanwhile combustion-supporting gas rotary kiln discharging pipeline in rotary kiln more than
Heat carries out heat exchange, so as to reduce the cooling load of follow-up cooling technique.But this application case also has the following disadvantages it
Place：(1), pellet residence time in rotary kiln discharging pipeline is shorter, and entrained heat is difficult to be fully utilized on pellet,
Rotary kiln utilization rate of waste heat is low；(2), cooling kiln is still required for cooling down by way of spray in it with certain temperature
Pellet, substantial amounts of residual heat resources are so wasted, cooling water consumption is big, adds overhaul of the equipments and the cost safeguarded, dislikes
Operating environment is changed.
In summary, how to overcome in the prior art that pellet calcination rotary kiln utilization rate of waste heat is low, spraying cooling side
Formula cooling effect is poor, great lot of water resources waste, cooling device be easily corroded, severe operational environment and pollute air deficiency, be
The technical barrier of current urgent need to resolve.
The content of the invention
1. invention technical problems to be solved
Instant invention overcomes pellet calcination rotary kiln utilization rate of waste heat in the prior art is low, spraying cooling mode cools down
Effect is poor, great lot of water resources waste, cooling device be easily corroded, severe operational environment and pollute air deficiency, there is provided one
Kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery method, realize improve pellet calcination rotary kiln utilization rate of waste heat,
Lift pellet cooling effect, saving water resource, protection cooling device, the function of improving operating environment and air quality.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the invention is：
The present invention pellet calcination rotary kiln product waste heat direct absorbing type recovery system, including burner, combustion chamber, rotary kiln,
Blanking chute, cooling cylinder bearing block, cooling cylinder driving wheel and cooling cylinder；Also include direct absorbing type waste heat recovering mechanism；
Above-mentioned direct absorbing type waste heat recovering mechanism includes induced duct, blower fan and dust arrester, and the entrance point of induced duct stretches into cold
But inside cylinder, the port of export of induced duct is connected with the air inlet of blower fan, and the air outlet of blower fan is connected with the import of dust arrester
Logical, the outlet of dust arrester is connected with the air intake of burner；The charging aperture and discharging opening of the cooling cylinder are open setting.
As further improvement of the present invention, the induced duct includes induced duct wind inlet section and induced duct soaking zone, draws
Airduct soaking zone is between cooling cylinder and blower fan, the outside parcel insulation material of induced duct soaking zone；The dust arrester is
Cyclone dust collectors, deduster air inlet are provided with deduster blast pipe, and deduster air outlet is provided with deduster discharge pipe；Air inducing
The entrance point of pipe wind inlet section is stretched into inside cooling cylinder, and the port of export of induced duct wind inlet section is connected with the entrance point of induced duct soaking zone
Logical, the port of export of induced duct soaking zone is connected with the air inlet of blower fan, and the air outlet of blower fan is connected with deduster blast pipe；
Deduster discharge pipe is connected with the air intake of burner.
As further improvement of the present invention, in addition to wind inlet section fixing device, above-mentioned wind inlet section fixing device includes
Cross bar, suspension rod and pole, suspension rod are fixed on the outside support of combustion chamber, and pole fixes on the ground；The cross bar is through cold
But the inside of cylinder, one end of cross bar are mutually fixed with suspension rod, and the other end of cross bar is mutually fixed with pole；The induced duct wind inlet section is consolidated
It is scheduled on cross bar；The cyclone dust collectors are on cyclone dust collectors base.
As further improvement of the present invention, the entrance point of the induced duct wind inlet section is referred to as horizontal air inlet, the water
The length direction of face where flat air inlet and induced duct wind inlet section is in 30 °~60 ° of angle, and the opening of horizontal air inlet tilts
Downwards.
As further improvement of the present invention, the downside of the induced duct wind inlet section is provided with lower air inlet, under enter
Entrance point of the air port close to induced duct wind inlet section.
As further improvement of the present invention, the cross bar is shaped steel；The thermal insulating material of parcel on the outside of induced duct soaking zone
Expect for heat-preservation cotton.
As further improvement of the present invention, the lower air inlet is 3~8 manholes, each manhole
A diameter of 10~100mm, the spacing of adjacent circular through hole is 20~150mm.
As further improvement of the present invention, the entrance point of induced duct wind inlet section is located at cooling cylinder midpoint and offset to both sides
In the range of 0~500mm；Induced duct wind inlet section, induced duct soaking zone, the caliber of deduster blast pipe and deduster discharge pipe are equal
For 150~500mm.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the present invention, comprises the following steps,
Step 1: the blower fan and cyclone dust collectors in pellet calcination rotary kiln product waste heat direct absorbing type recovery system are opened,
Air is inhaled into inside cooling cylinder from the charging aperture and discharging opening at cooling cylinder both ends respectively, into the air and grain inside cooling cylinder
Expect that surface is carried out after heat convection is heated, then induced duct wind inlet section entered by horizontal air inlet and lower air inlet；
Step 2: the hot-air into induced duct wind inlet section is inhaled into blower fan by induced duct soaking zone, and pass through blower fan
Blasted cyclone dust collectors and carry out dust separation；
Step 3: the hot-air after dust separation enters the air intake of burner by deduster discharge pipe, it is burner
Flame combustion provides preheated air, realizes the recovery to pellet calcination rotary kiln product waste heat.
As further improvement of the present invention, the air quantity of the blower fan is 1000~3000m3/h。
3. beneficial effect
Using technical scheme provided by the invention, compared with prior art, there is following remarkable result：
(1), pellet calcination rotary kiln product waste heat direct absorbing type recovery system and method for the invention, using direct absorbing type waste heat
Recovering mechanism, the air entered by blower fan suction from the charging aperture and discharging opening at cooling cylinder both ends, air is inside cooling cylinder
Heat convection is carried out with high temperature pellet surface to be heated, hot-air blasts cyclone dust collectors by blower fan again and carries out dust separation, removes
Hot-air after dirt purification enters the air intake of burner by deduster discharge pipe, and preheating sky is provided for the flame combustion of burner
Gas, the recovery to pellet calcination rotary kiln product waste heat is realized, so that yield is the bioceramic filtrate rotary kiln of 80t/ days as an example,
The temperature that product enters in cooling cylinder is about 900 DEG C, is computed, after reclaiming product waste heat by direct absorbing type waste heat recovering mechanism,
The temperature of preheated air can be promoted to 400 DEG C or so, the process can reclaim 35.3% or so of product waste heat, energy-saving effect ten
Divide notable.
(2), in the present invention, residual heat resources that pellet after high-temperature calcination the carries quilt in the Convective Heat Transfer with air
Utilization is fully absorbed, the hot-air of formation is combustion-supporting as the combustion air of burner, improves the efficiency of combustion and combustion efficiency of burner,
Meet the recycling economy principle of energy-saving and emission-reduction；And air directly carries out heat convection, air mass flow and stream with high temperature pellet surface
Speed is all larger, and this pellet is directly more preferable compared to traditional indirect type of cooling cooling effect by air cooled mode, and
Energy recovery waste heat resource, saves cost, kills two birds with one stone.
(3), in the present invention, after direct absorbing type waste heat recovering mechanism, the pellet in cooling cylinder after high-temperature calcination drops rapidly
Temperature, without continuing to cool to pellet using traditional cool water shower mode, water resource and cooling water circulation spray are saved
The a large amount of electric power consumed during leaching；And avoid because of long-term cool water shower, severe oxidation corrosion cooling device, increase equipment
Maintenance and the phenomenon of maintenance cost, also avoid producing a large amount of vapours around cooling cylinder, improve operating environment.
(4), in the present invention, the hot-air containing solid dust particle is subjected to dust separation using cyclone dust collectors, with
Exempt from dust-laden hot-air and block burner；And avoid using air during traditional processing technology largely with solid dust particle with grain
Material is discharged from cooling cylinder discharging opening, pollutes surrounding air, reduces the phenomenon of air quality.
(5), pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the invention, only does on the basis of existing equipment
Less change can be achieved, and improvement cost is relatively low, and Operation and maintenance are convenient, and overall economic efficiency is notable.
Brief description of the drawings
Fig. 1 is the structural representation of the pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present invention；
Fig. 2 is the partial structural diagram of induced duct wind inlet section in the present invention.
Label declaration in schematic diagram：1st, burner；2nd, combustion chamber；3rd, rotary kiln；4th, blanking chute；5th, cooling cylinder；601、
Induced duct wind inlet section；602nd, induced duct soaking zone；7th, blower fan；801st, deduster blast pipe；802nd, deduster discharge pipe；901st, revolve
Wind deduster；902nd, deduster air inlet；903rd, deduster air outlet；10th, cross bar；11st, suspension rod；12nd, pole；13rd, whirlwind removes
Dirt device base；1401st, horizontal air inlet；1402nd, lower air inlet.
Embodiment
To further appreciate that present disclosure, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
As depicted in figs. 1 and 2, the pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, including burn
Mouth 1, combustion chamber 2, rotary kiln 3, blanking chute 4, cooling cylinder bearing block, cooling cylinder driving wheel and cooling cylinder 5.Burner 1 is burning
Produce combustion flame in room 2, the pellet in calcination rotary kiln 3；Pellet after calcining is flowed out to up to cooling cylinder 5 from blanking chute 4
Charging aperture；Cooling cylinder bearing block has two, and cooling cylinder 5 is obliquely installed on the cooling cylinder bearing block of two different heights,
So that the height at the charging aperture of cooling cylinder 5 is higher than the height of the discharge outlet of cooling cylinder 5；Cooling cylinder drive wheel cooling cylinder 5 revolves
Turn, the pellet in cooling cylinder 5 moves with the rotation of cooling cylinder 5 to the discharging opening of cooling cylinder 5.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, in addition to direct absorbing type machine waste heat recovery
Structure, above-mentioned direct absorbing type waste heat recovering mechanism include induced duct, blower fan 7 and dust arrester, and the entrance point of induced duct stretches into cooling cylinder 5
Inside, the port of export of induced duct are connected with the air inlet of blower fan 7, and the air outlet of blower fan 7 is connected with the import of dust arrester,
The outlet of dust arrester is connected with the air intake of burner 1.Blower fan 7 is used to aspirate the gas in cooling cylinder 5, and gas is roused
To cyclone dust collectors 901；Higher in view of the temperature of hot-air, blower fan 7 uses high-temperature blower, to improve the use of blower fan 7
Life-span.The charging aperture and discharging opening of cooling cylinder 5 are open setting, so that the inside of cooling cylinder 5 and the big gas phase of surrounding environment
Connection, facilitate air respectively from the charging aperture and discharging opening of cooling cylinder 5 enter the inside of cooling cylinder 5 and with the grain inside cooling cylinder 5
Expect that surface carries out heat convection.
Specifically, induced duct includes induced duct wind inlet section 601 and induced duct soaking zone 602, induced duct soaking zone 602 is located at
Between cooling cylinder 5 and blower fan 7, the outside of induced duct soaking zone 602 parcel insulation material, induced duct soaking zone in the present embodiment
The insulation material of 602 outside parcels is heat-preservation cotton, reduces the thermal loss of induced duct soaking zone 602.Dust arrester is whirlwind
Deduster 901, cyclone dust collectors 901 are used to remove entrained solid dust granules in hot-air, hot-air are purified, with
Exempt from dust-laden hot-air and block burner 1；Cyclone dust collectors 901 are set on cyclone dust collectors base 13 on deduster air inlet 902
There is deduster blast pipe 801, deduster air outlet 903 is provided with deduster discharge pipe 802.The import of induced duct wind inlet section 601
End is stretched into inside cooling cylinder 5, and the port of export of induced duct wind inlet section 601 is connected with the entrance point of induced duct soaking zone 602, air inducing
The port of export of pipe soaking zone 602 is connected with the air inlet of blower fan 7, and the air outlet of blower fan 7 is connected with deduster blast pipe 801
It is logical；Deduster discharge pipe 802 is connected with the air intake of burner 1.Induced duct wind inlet section 601 is consolidated by wind inlet section fixing device
It is scheduled on inside cooling cylinder 5, specifically, above-mentioned wind inlet section fixing device includes cross bar 10, suspension rod 11 and pole 12, suspension rod 11 is fixed
On the outside support of combustion chamber 2, pole 12 fixes on the ground；Cross bar 10 runs through the inside of cooling cylinder 5, one end of cross bar 10
Fixed with the phase of suspension rod 11, the other end and the phase of pole 12 of cross bar 10 are fixed；Induced duct wind inlet section 601 is fixed on cross bar 10, is
Increase fixing intensity, cross bar 10 are angle steel.The entrance point of induced duct wind inlet section 601 is referred to as horizontal air inlet 1401, in order to anti-
Tablet material enters induced duct wind inlet section 601 when top is fallen in cooling cylinder 5, the horizontal place face of air inlet 1401 and induced duct
The length direction of wind inlet section 601 is in 30 °~60 ° of angle, and the opening of horizontal air inlet 1401 is diagonally downward, specifically, this
The length direction of the horizontal place face of air inlet 1401 and induced duct wind inlet section 601 is in 45 ° of angle in embodiment.In order to expand sky
Gas enters the entrance of induced duct wind inlet section 601, increases air mass flow, the downside of induced duct wind inlet section 601 is provided with lower air intake
Mouth 1402, entrance point of the lower air inlet 1402 close to induced duct wind inlet section 601.Lower air inlet 1402 is 3~8 manholes,
A diameter of 10~100mm of each manhole, the spacing of adjacent circular through hole is 20~150mm, specifically, in the present embodiment
Lower air inlet 1402 is 5 manholes, and a diameter of 50mm of each manhole, the spacing of adjacent circular through hole is 100mm.
In order to ensure that horizontal air inlet 1401 and lower air inlet 1402 are drawn into the uniform hot-air of temperature, air inducing from the both ends of cooling cylinder 5
The entrance point of pipe wind inlet section 601 be located at the midpoint of cooling cylinder 5 to both sides offset 0~500mm in the range of；Induced duct wind inlet section 601,
The caliber of induced duct soaking zone 602, deduster blast pipe 801 and deduster discharge pipe 802 is 150~500mm, specifically,
The entrance point of induced duct wind inlet section 601 is located at the midpoint of cooling cylinder 5 and offset to the left at 500mm in the present embodiment, induced duct air intake
Section 601, induced duct soaking zone 602, the caliber of deduster blast pipe 801 and deduster discharge pipe 802 are 300mm.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the present embodiment, comprises the following steps,
Step 1: open the blower fan 7 and cyclone dust collectors in pellet calcination rotary kiln product waste heat direct absorbing type recovery system
901, air is inhaled into inside cooling cylinder 5 from the charging aperture and discharging opening at the both ends of cooling cylinder 5 respectively, into inside cooling cylinder 5
Air and high temperature pellet surface are carried out after heat convection is heated, then entered by horizontal air inlet 1401 and lower air inlet 1402
Induced duct wind inlet section 601, wherein, air and the cooled cooling of pellet after high temperature pellet surface progress heat convection, and air stream
Amount and flow velocity are all larger, and the effect of pellet cooling is more apparent；
Step 2: the hot-air into induced duct wind inlet section 601 is inhaled into blower fan 7 by induced duct soaking zone 602, now
Contain more solid dust particle in hot-air, the hot-air containing solid dust particle is then blasted by rotation by blower fan 7
Wind deduster 901 carries out dust separation；
Step 3: the hot-air after dust separation enters the air intake of burner 1 by deduster discharge pipe 802, to burn
The flame combustion of mouth 1 provides preheated air (i.e. combustion-supporting as combustion air), realizes and pellet calcination rotary kiln product waste heat is returned
Receive.
Wherein, the air quantity of blower fan 7 is 1000~3000m3/ h, the air quantity of blower fan 7 is specially 2000m in the present embodiment3/h。
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system and method for the present embodiment, returned using direct absorbing type waste heat
Mechanism is received, the air entered from the charging aperture and discharging opening at the both ends of cooling cylinder 5 is aspirated by blower fan 7, air is inside cooling cylinder 5
Heat convection is carried out with high temperature pellet surface to be heated, hot-air blasts cyclone dust collectors 901 by blower fan 7 again, and to carry out dedusting net
Change, the hot-air after dust separation enters the air intake of burner 1 by deduster discharge pipe 802, is the flame combustion of burner 1
Preheated air is provided, realizes the recovery to pellet calcination rotary kiln product waste heat, using yield as the bioceramic filtrate of 80t/ days
Exemplified by rotary kiln, the temperature that product enters in cooling cylinder 5 is about 900 DEG C, is computed, is reclaimed by direct absorbing type waste heat recovering mechanism
After product waste heat, the temperature of preheated air can be promoted to 400 DEG C or so, the process can reclaim 35.3% left side of product waste heat
The right side, energy-saving effect are very notable.
In the present embodiment, the residual heat resources that the pellet after high-temperature calcination carries are filled in the Convective Heat Transfer with air
Dividing and absorb, the hot-air of formation is combustion-supporting as the combustion air of burner 1, improves the efficiency of combustion and combustion efficiency of burner 1,
Meet the recycling economy principle of energy-saving and emission-reduction；And air directly carries out heat convection, air mass flow and stream with high temperature pellet surface
Speed is all larger, and this pellet is directly more preferable compared to traditional indirect type of cooling cooling effect by air cooled mode, and
Energy recovery waste heat resource, saves cost, kills two birds with one stone.
In the present embodiment, after direct absorbing type waste heat recovering mechanism, the pellet in cooling cylinder 5 after high-temperature calcination drops rapidly
Temperature, without continuing to cool to pellet using traditional cool water shower mode, water resource and cooling water circulation spray are saved
The a large amount of electric power consumed during leaching；And avoid because of long-term cool water shower, severe oxidation corrosion cooling device, increase equipment
Maintenance and the phenomenon of maintenance cost, also avoid the surrounding of cooling cylinder 5 from producing a large amount of vapours, improve operating environment.
In the present embodiment, the hot-air containing solid dust particle is subjected to dust separation using cyclone dust collectors 901, with
Exempt from dust-laden hot-air and block burner 1；And avoid using air during traditional processing technology largely with solid dust particle with
Pellet is discharged from the discharging opening of cooling cylinder 5, pollutes surrounding air, reduces the phenomenon of air quality.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, only done on the basis of existing equipment compared with
Few change can be achieved, and improvement cost is relatively low, and Operation and maintenance are convenient, and overall economic efficiency is notable.
Embodiment 2
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, its basic structure and the phase of embodiment 1
Together, its difference is：Cross bar 10 is channel-section steel；The horizontal place face of air inlet 1401 and the length side of induced duct wind inlet section 601
To the angle in 60 °；Lower air inlet 1402 is 3 manholes, a diameter of 100mm of each manhole, and adjacent circular is led to
The spacing in hole is 150mm；The entrance point of induced duct wind inlet section 601 is located at the midpoint of cooling cylinder 5, induced duct wind inlet section 601, air inducing
The caliber of pipe soaking zone 602, deduster blast pipe 801 and deduster discharge pipe 802 is 500mm.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the present embodiment, its basic step and the phase of embodiment 1
Together, its difference is：The air quantity of blower fan 7 is 3000m3/h。
Embodiment 3
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, its basic structure and the phase of embodiment 1
Together, its difference is：Cross bar 10 is square steel；The horizontal place face of air inlet 1401 and the length side of induced duct wind inlet section 601
To the angle in 30 °；Lower air inlet 1402 is 8 manholes, a diameter of 10mm of each manhole, adjacent circular through hole
Spacing be 20mm；The entrance point of induced duct wind inlet section 601 is located at the midpoint of cooling cylinder 5 and offset to the right at 500mm, and induced duct enters
Wind section 601, induced duct soaking zone 602, the caliber of deduster blast pipe 801 and deduster discharge pipe 802 are 150mm.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the present embodiment, its basic step and the phase of embodiment 1
Together, its difference is：The air quantity of blower fan 7 is 1000m3/h。
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness
Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (10)
- A kind of 1. pellet calcination rotary kiln product waste heat direct absorbing type recovery method, it is characterised in that：Comprise the following steps,Step 1: open the blower fan (7) in the pellet calcination rotary kiln product waste heat direct absorbing type recovery system and cyclone dust removal Device (901), air is inhaled into cooling cylinder (5) inside from the charging aperture and discharging opening at cooling cylinder (5) both ends respectively, into cooling cylinder (5) after internal air is heated with pellet surface progress heat convection, then horizontal air inlet (1401) and lower air inlet are passed through (1402) induced duct wind inlet section 601 is entered；Step 2: the hot-air into induced duct wind inlet section (601) is inhaled into blower fan (7) by induced duct soaking zone (601), and Cyclone dust collectors (901) are blasted by blower fan (7) and carry out dust separation；Step 3: the hot-air after dust separation enters the air intake of burner (1) by deduster discharge pipe (802), to burn The flame combustion of mouth (1) provides preheated air, realizes the recovery to pellet calcination rotary kiln product waste heat.
- 2. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 1, it is characterised in that：It is described The air quantity of blower fan (7) is 1000~3000m3/h。
- 3. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 1, it is characterised in that：The pellet calcination rotary kiln product waste heat direct absorbing type recovery system include burner (1), combustion chamber (2), rotary kiln (3), Blanking chute (4), cooling cylinder bearing block, cooling cylinder driving wheel, cooling cylinder (5) and direct absorbing type waste heat recovering mechanism；Above-mentioned direct absorbing type waste heat recovering mechanism includes induced duct, blower fan (7) and dust arrester, and the entrance point of induced duct stretches into cooling Cylinder (5) is internal, and the port of export of induced duct is connected with the air inlet of blower fan (7), the air outlet of blower fan (7) and entering for dust arrester Mouth is connected, and the outlet of dust arrester is connected with the air intake of burner (1)；The charging aperture of the cooling cylinder (5) and discharging Mouth opening is set.
- 4. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 3, it is characterised in that：It is described Induced duct includes induced duct wind inlet section (601) and induced duct soaking zone (602), and induced duct soaking zone (602) is located at cooling cylinder (5) Between blower fan (7), the outside parcel insulation material of induced duct soaking zone (602)；The dust arrester is cyclone dust collectors (901), deduster air inlet (902) is provided with deduster blast pipe (801), and deduster air outlet (903) is provided with deduster Discharge pipe (802)；The entrance point of induced duct wind inlet section (601) stretches into cooling cylinder (5) inside, and induced duct wind inlet section (601) go out Mouth end is connected with the entrance point of induced duct soaking zone (602), the port of export of induced duct soaking zone (602) and entering for blower fan (7) Air port is connected, and the air outlet of blower fan (7) is connected with deduster blast pipe (801)；Deduster discharge pipe (802) and burner (1) air intake is connected.
- 5. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 4, it is characterised in that：Also wrap Wind inlet section fixing device is included, above-mentioned wind inlet section fixing device includes cross bar (10), suspension rod (11) and pole (12), and suspension rod (11) is solid It is scheduled on the outside support of combustion chamber (2), pole (12) fixes on the ground；The cross bar (10) is interior through cooling cylinder (5) Portion, one end and the suspension rod (11) of cross bar (10) are mutually fixed, and the other end and the pole (12) of cross bar (10) are mutually fixed；The induced duct Wind inlet section (601) is fixed on cross bar (10)；The cyclone dust collectors (901) are on cyclone dust collectors base (13).
- 6. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 4, it is characterised in that：It is described The entrance point of induced duct wind inlet section (601) is referred to as horizontal air inlet (1401), face and air inducing where the horizontal air inlet (1401) The length direction of pipe wind inlet section (601) is in 30 °~60 ° of angle, and the opening of horizontal air inlet (1401) is diagonally downward.
- 7. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 4, it is characterised in that：It is described The downside of induced duct wind inlet section (601) is provided with lower air inlet (1402), and lower air inlet (1402) is close to induced duct wind inlet section (601) entrance point.
- 8. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 5, it is characterised in that：It is described Cross bar (10) is shaped steel；The insulation material of parcel is heat-preservation cotton on the outside of induced duct soaking zone (602).
- 9. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 7, it is characterised in that：It is described Lower air inlet (1402) is 3~8 manholes, a diameter of 10~100mm of each manhole, between adjacent circular through hole Away from for 20~150mm.
- 10. the pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 4~9 any one, its It is characterised by：The entrance point of induced duct wind inlet section (601) is located at the scope that cooling cylinder (5) midpoint offsets 0~500mm to both sides It is interior；Induced duct wind inlet section (601), induced duct soaking zone (602), deduster blast pipe (801) and deduster discharge pipe (802) Caliber is 150~500mm.
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| CN108133114A (en) * | 2018-01-12 | 2018-06-08 | 哈尔滨理工大学 | Static pressure rotary worktable convection transfer rate computational methods |
| CN109059565A (en) * | 2018-07-26 | 2018-12-21 | 张孔明 | A kind of recovery system and method to discharge for Industrial Stoves from heat load |
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| CN113865336A (en) * | 2021-08-30 | 2021-12-31 | 中信重工机械股份有限公司 | Waste heat recovery device for cooling sinter by rotary kiln |
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| CN106247791B (en) * | 2016-09-29 | 2018-07-24 | 济南裕兴化工有限责任公司 | Titanium workshop rotary kiln with waste heat from tail gas reuse function and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104949537B (en) | 2017-07-14 |
| CN107449286B (en) | 2019-02-22 |
| CN104949537A (en) | 2015-09-30 |
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