CN107449286B - 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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- CN107449286B CN107449286B CN201710699806.8A CN201710699806A CN107449286B CN 107449286 B CN107449286 B CN 107449286B CN 201710699806 A CN201710699806 A CN 201710699806A CN 107449286 B CN107449286 B CN 107449286B
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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
Abstract
The invention discloses a kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery methods, belong to rotary kiln product heat recovery technology field.The present invention includes the following steps, Step 1: opening blower and cyclone dust collectors, air is inhaled into inside cooling cylinder from the inlet port and outlet port at cooling cylinder both ends respectively, into inside cooling cylinder air and pellet surface carry out 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 by induced duct soaking zone, and cyclone dust collectors are blasted by blower and are dusted purification；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 realizes the function of improving pellet calcination rotary kiln utilization rate of waste heat, promote pellet cooling effect, save water resource, protect cooling equipment, improving operating environment and air quality.
Description
Present patent application is for application No. is 2015104380589 divisional application, the applyings date of original application
Are as follows: 2015-07-22, invention and created name are as follows: 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 fields, calcine and turn round more specifically to a kind of pellet
Kiln product waste heat direct absorbing type recovery method.
Background technique
Calcined by rotary kiln is the main technique for producing bioceramic filtrate, and effect is (i.e. viscous to the raw material of filtrate production
Spherical particle made of soil and flyash) carry out drying and sintering processes, wherein and drying section is to exclude contained by ceramic filter material
Moisture, intensity and hardness requirement needed for sintering stage makes filtrate bead reach industrial application by calcining.
In existing bioceramic filtrate production technology, rotary kiln is all made of as its main calciner.Burning system
System feeds heat in rotary kiln in the form of high-temperature flue gas, carries out heating and calcining 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, cooling into cooling cylinder.In order to strengthen cooling effect, lead to
Cool water shower often is carried out in cooling drum outer wall, forges the heat stored in rear ceramic filter material 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 is recycled.But above-mentioned bioceramic filtrate
Production technology has the shortcomings that following several respects: (1) the residual heat resources quilt that the pellet (i.e. ceramic filter material), after high-temperature calcination carries
Waste completely, runs counter to the circular economy principle of energy-saving and emission-reduction；And spraying cooling mode is carried out indirectly to high-temperature calcination product
Cooling, cooling efficiency is low, cooling effect is poor；(2), during cool water shower, a large amount of cooling waters become steam and lose, cold
But water consumption is big, is unfavorable for the saving of water resource；And a large amount of electric power are consumed during cooling water circulated sprinkling；(3), long-term
The spray of cooling water, severe oxidation have corroded cooling equipment, increase the cost of overhaul of the equipments and maintenance；(4), it sprays for a long time cold
But process produces a large amount of hot steams in ambient enviroment, is degrading operating environment；(5), the air largely with solid dust particle
As pellet is discharged from cooling cylinder discharge port, it polluted surrounding air, reduce air quality.
For dispersed heat in recycling pellet production process, has relevant technical solution in the prior art and disclose, such as
Patent publication No.: 203824299 U of CN, publication date: on 09 10th, 2014, invention and created name are as follows: rotary kiln UTILIZATION OF VESIDUAL HEAT IN
Structure and rotary kiln production system, this application discloses a kind of rotary kiln waste heat utilization structure and rotary kiln production systems, return
Rotary kiln waste heat utilization structure include the rotary kiln discharging pipeline for connecting rotary kiln and cooling kiln, 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, can incite somebody to action
Combustion-supporting gas is supplied in rotary kiln.After combustion-supporting gas is heated in rotary kiln discharging pipeline using the waste heat of rotary kiln,
It is passed through rotary kiln again, 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 subsequent cooling technique.But there is also following deficiencies for this application
Place: (1), pellet residence time in rotary kiln discharging pipeline it is shorter, entrained heat is difficult to be fully utilized on pellet,
Rotary kiln utilization rate of waste heat is low；(2), kiln is cooled down to be still required to cool down by way of spray in it with certain temperature
Pellet does so and wastes a large amount of residual heat resources, and cooling water consumption is big, increases the cost of overhaul of the equipments and maintenance, dislikes
Operating environment is changed.
In conclusion how to overcome in the prior art, pellet calcination rotary kiln utilization rate of waste heat is low, spraying cooling side
Formula cooling effect is poor, great lot of water resources wastes, cooling equipment is easily corroded, the deficiency of severe operational environment and pollution air, is
The technical problem of current urgent need to resolve.
Summary of the invention
1. technical problems to be solved by the inivention
Low, spraying cooling mode cooling that the present invention overcomes pellet calcination rotary kiln utilization rate of waste heat in the prior art
Effect is poor, great lot of water resources wastes, cooling equipment is easily corroded, the deficiency of severe operational environment and pollution air, provides 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,
The function of promoting pellet cooling effect, save water resource, protect cooling equipment, improving operating environment and air quality.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
Pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the invention, including burner, combustion chamber, rotary kiln,
Blanking chute, cooling cylinder bearing block, cooling cylinder driving wheel and cooling cylinder；It further include direct absorbing type waste heat recovering mechanism；
Above-mentioned direct absorbing type waste heat recovering mechanism includes induced duct, blower and dust-extraction unit, and the input end of induced duct protrudes into cold
But inside cylinder, the outlet end of induced duct is connected with the air inlet of blower, and the air outlet of blower is connected with the import of dust-extraction unit
Logical, the outlet of dust-extraction unit is connected with the air intake of burner；The inlet port and outlet port 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, is drawn
For air hose soaking zone between cooling cylinder and blower, thermal insulation material is wrapped up in the outside of induced duct soaking zone；The dust-extraction unit is
Cyclone dust collectors, deduster air inlet are equipped with deduster blast pipe, and deduster air outlet is equipped with deduster discharge pipe；Air inducing
The input end of pipe wind inlet section protrudes into inside cooling cylinder, and the outlet end of induced duct wind inlet section is connected with the input end of induced duct soaking zone
Logical, the outlet end of induced duct soaking zone is connected with the air inlet of blower, and the air outlet of blower is connected with deduster blast pipe；
Deduster discharge pipe is connected with the air intake of burner.
It further include the fixed device of wind inlet section as further improvement of the present invention, the fixed device of above-mentioned wind inlet section includes
Cross bar, sunpender and strut, sunpender are fixed on the outside support of combustion chamber, and strut fixes on the ground；The cross bar is through cold
But one end of the inside of cylinder, cross bar is mutually fixed with sunpender, and the other end of cross bar is mutually fixed with strut；The induced duct wind inlet section is solid
It is scheduled on cross bar；The cyclone dust collectors are set on cyclone dust collectors pedestal.
As further improvement of the present invention, the input end of the induced duct wind inlet section is known as horizontal air inlet, the water
The length direction of face and induced duct wind inlet section where flat air inlet 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 equipped with lower air inlet, under into
Input end of the air port close to induced duct wind inlet section.
As further improvement of the present invention, the cross bar is fashioned iron；The thermal insulating material wrapped up on the outside of induced duct soaking zone
Material is heat-preservation cotton.
As further improvement of the present invention, the lower air inlet is 3~8 circular through holes, each circular through hole
Diameter is 10~100mm, and the spacing of adjacent circular through-hole is 20~150mm.
As further improvement of the present invention, the input end of induced duct wind inlet section is located at cooling cylinder midpoint and is 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.
Pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the invention, includes the following steps,
Step 1: the blower 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 inlet port and outlet port at cooling cylinder both ends respectively, into the air and grain inside cooling cylinder
Material surface carries out after heat convection is heated, then enters induced duct wind inlet section by horizontal air inlet and lower air inlet；
Step 2: the hot-air into induced duct wind inlet section is inhaled into blower by induced duct soaking zone, and pass through blower
It is blasted cyclone dust collectors and is dusted purification；
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 recycling to pellet calcination rotary kiln product waste heat.
As further improvement of the present invention, the air quantity of the blower is 1000~3000m3/h。
3. beneficial effect
Using technical solution 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 aspirates the air entered from the inlet port and outlet port at cooling cylinder both ends by blower, and air is inside cooling cylinder
It carries out heat convection with high temperature pellet surface to be heated, hot-air blasts cyclone dust collectors by blower again and is dusted purification, removes
The purified hot-air of dirt enters the air intake of burner by deduster discharge pipe, provides preheating sky for the flame combustion of burner
Gas realizes the recycling to pellet calcination rotary kiln product waste heat, by taking yield is 80t/ days bioceramic filtrate rotary kilns as an example,
The temperature that product enters in cooling cylinder is about 900 DEG C, is computed, after recycling 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, which can recycle 35.3% or so of product waste heat, energy-saving effect ten
Divide significant.
(2), in the present invention, the residual heat resources that the pellet after high-temperature calcination 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, the efficiency of combustion and combustion efficiency of burner are improved,
Meet the circular 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 cools down to pellet using traditional cool water shower mode without continuing, and has saved water resource and cooling water circulation spray
The a large amount of electric power consumed during leaching；And avoid because of long-term cool water shower, severe oxidation corrodes cooling equipment, increases equipment
The phenomenon that maintenance and repair costs, also avoids generating a large amount of hot steams around cooling cylinder, improves operating environment.
(4), in the present invention, the hot-air containing solid dust particle is dusted purification using cyclone dust collectors, with
Exempt from dust-laden hot-air blocking burner；And it avoids using air when traditional processing technology largely with solid dust particle with grain
The phenomenon that material is discharged from cooling cylinder discharge port, pollutes surrounding air, reduces 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 realized, and improvement cost is lower, and Operation and maintenance are convenient, and overall economic efficiency is significant.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the invention；
Fig. 2 is the partial structural diagram of induced duct wind inlet section in the present invention.
Label declaration in schematic diagram: 1, burner；2, combustion chamber；3, rotary kiln；4, blanking chute；5, cooling cylinder；601,
Induced duct wind inlet section；602, induced duct soaking zone；7, blower；801, deduster blast pipe；802, deduster discharge pipe；901, it revolves
Wind deduster；902, deduster air inlet；903, deduster air outlet；10, cross bar；11, sunpender；12, strut；13, whirlwind removes
Dirt device pedestal；1401, horizontal air inlet；1402, lower air inlet.
Specific embodiment
To further appreciate that the contents of the present invention, 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
Combustion flame, the pellet in calcination rotary kiln 3 are generated in room 2；Calcined pellet is flowed out from blanking chute 4 reaches cooling cylinder 5
Feed inlet；There are two cooling cylinder bearing blocks, and cooling cylinder 5 is obliquely installed on the cooling cylinder bearing block of two different heights,
So that the height at 5 feed inlet of cooling cylinder is higher than the height of 5 discharge outlet of cooling cylinder；Cooling cylinder drive wheel cooling cylinder 5 revolves
Turn, the pellet in cooling cylinder 5 is mobile to the discharge port of cooling cylinder 5 with the rotation of cooling cylinder 5.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, further includes direct absorbing type machine waste heat recovery
Structure, above-mentioned direct absorbing type waste heat recovering mechanism include induced duct, blower 7 and dust-extraction unit, and the input end of induced duct protrudes into cooling cylinder 5
The outlet end of inside, induced duct is connected with the air inlet of blower 7, and the air outlet of blower 7 is connected with the import of dust-extraction unit,
The outlet of dust-extraction unit is connected with the air intake of burner 1.Blower 7 is used to aspirate the gas in cooling cylinder 5, and gas is roused
To cyclone dust collectors 901；In view of the temperature of hot-air is higher, blower 7 uses high-temperature blower, to improve the use of blower 7
Service life.The inlet port and outlet port of cooling cylinder 5 are open setting, so that the big gas phase of cooling cylinder 5 inside and ambient enviroment
Connection, facilitate air respectively from the inlet port and outlet port 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 7, thermal insulation material, induced duct soaking zone in the present embodiment are wrapped up in the outside of induced duct soaking zone 602
The thermal insulation material that 602 outsides are wrapped up is heat-preservation cotton, reduces the thermal loss of induced duct soaking zone 602.Dust-extraction unit is whirlwind
Deduster 901, cyclone dust collectors 901 are used to remove entrained solid dust particles in hot-air, purify to hot-air, with
Exempt from dust-laden hot-air blocking burner 1；Cyclone dust collectors 901 are set on cyclone dust collectors pedestal 13, are set on deduster air inlet 902
There is deduster blast pipe 801, deduster air outlet 903 is equipped with deduster discharge pipe 802.The import of induced duct wind inlet section 601
End is protruded into inside cooling cylinder 5, and the outlet end of induced duct wind inlet section 601 is connected with the input end of induced duct soaking zone 602, air inducing
The outlet end of pipe soaking zone 602 is connected with the air inlet of blower 7, and the air outlet of blower 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 solid by the fixed device of wind inlet section
It is scheduled on inside cooling cylinder 5, specifically, the fixed device of above-mentioned wind inlet section includes cross bar 10, sunpender 11 and strut 12, sunpender 11 is fixed
On the outside support of combustion chamber 2, strut 12 is fixed on the ground；Cross bar 10 runs through the inside of cooling cylinder 5, one end of cross bar 10
It is fixed with 11 phase of sunpender, the other end and 12 phase of strut 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 input end of induced duct wind inlet section 601 is known 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 1401 place face of air inlet 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 horizontal 1401 place face of air inlet 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, and the downside of induced duct wind inlet section 601 is equipped with lower air inlet
Mouth 1402, input end of the lower air inlet 1402 close to induced duct wind inlet section 601.Lower air inlet 1402 is 3~8 circular through holes,
The diameter of each circular through hole is 10~100mm, and the spacing of adjacent circular through-hole is 20~150mm, specifically, in the present embodiment
Lower air inlet 1402 is 5 circular through holes, and the diameter of each circular through hole is 50mm, and the spacing of adjacent circular through-hole is 100mm.
In order to guarantee that horizontal air inlet 1401 and lower air inlet 1402 are drawn into the uniform hot-air of temperature, air inducing from 5 both ends of cooling cylinder
The input end of pipe wind inlet section 601 is located at 5 midpoint of cooling cylinder and is offset to both sides in the range of 0~500mm；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 input end of induced duct wind inlet section 601 is located at 5 midpoint of cooling cylinder and deviates at 500mm to the left in the present embodiment, induced duct air inlet
Section 601, induced duct soaking zone 602, deduster blast pipe 801 and deduster discharge pipe 802 caliber be 300mm.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the present embodiment, includes the following steps,
Step 1: opening the blower 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 inlet port and outlet port at 5 both ends of cooling cylinder respectively, into inside cooling cylinder 5
After air and high temperature pellet surface progress heat convection are heated, then pass through horizontal air inlet 1401 and the entrance of lower air inlet 1402
Induced duct wind inlet section 601, wherein air and high temperature pellet surface carry out the cooled cooling of pellet after heat convection, and air stream
Amount and flow velocity are all larger, and the cooling effect of pellet is more apparent；
Step 2: the hot-air into induced duct wind inlet section 601 is inhaled into blower 7 by induced duct soaking zone 602, at this time
Contain more solid dust particle in hot-air, the hot-air containing solid dust particle is then blasted by rotation by blower 7
Wind deduster 901 is dusted purification；
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), and pellet calcination rotary kiln product waste heat is returned in realization
It receives.
Wherein, the air quantity of blower 7 is 1000~3000m3/ h, the air quantity of blower 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 are returned using direct absorbing type waste heat
Mechanism is received, the air entered from the inlet port and outlet port at 5 both ends of cooling cylinder is aspirated by blower 7, air is inside cooling cylinder 5
It carries out heat convection with high temperature pellet surface to be heated, hot-air blasts cyclone dust collectors 901 by blower 7 again and is dusted only
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 recycling to pellet calcination rotary kiln product waste heat, the bioceramic filtrate for being 80t/ days with yield
For rotary kiln, the temperature that product enters in cooling cylinder 5 is about 900 DEG C, is computed, and is recycled 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, which can recycle 35.3% left side of product waste heat
The right side, energy-saving effect are very significant.
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 is absorbed and utilized, the hot-air of formation is combustion-supporting as the combustion air of burner 1, the efficiency of combustion and combustion efficiency of burner 1 are improved,
Meet the circular 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 cools down to pellet using traditional cool water shower mode without continuing, and has saved water resource and cooling water circulation spray
The a large amount of electric power consumed during leaching；And avoid because of long-term cool water shower, severe oxidation corrodes cooling equipment, increases equipment
The phenomenon that maintenance and repair costs, also avoids 5 surrounding of cooling cylinder from generating a large amount of hot steams, improves operating environment.
In the present embodiment, the hot-air containing solid dust particle is dusted purification using cyclone dust collectors 901, with
Exempt from dust-laden hot-air blocking burner 1；And avoid using air when traditional processing technology largely with solid dust particle with
The phenomenon that pellet is discharged from 5 discharge port of cooling cylinder, pollutes surrounding air, reduces 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 realized, and improvement cost is lower, and Operation and maintenance are convenient, and overall economic efficiency is significant.
Embodiment 2
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, basic structure and 1 phase of embodiment
Together, the difference is that: cross bar 10 be channel steel；The length side in horizontal air inlet 1401 place face and induced duct wind inlet section 601
To the angle for being in 60 °；Lower air inlet 1402 is 3 circular through holes, and the diameter of each circular through hole is 100mm, and adjacent circular is logical
The spacing in hole is 150mm；The input end of induced duct wind inlet section 601 is located at 5 midpoint of cooling cylinder, 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, basic step and 1 phase of embodiment
Together, the difference is that: the air quantity of blower 7 be 3000m3/h。
Embodiment 3
The pellet calcination rotary kiln product waste heat direct absorbing type recovery system of the present embodiment, basic structure and 1 phase of embodiment
Together, the difference is that: cross bar 10 be square steel；The length side in horizontal air inlet 1401 place face and induced duct wind inlet section 601
To the angle for being in 30 °；Lower air inlet 1402 is 8 circular through holes, and the diameter of each circular through hole is 10mm, adjacent circular through-hole
Spacing be 20mm；The input end of induced duct wind inlet section 601 is located at 5 midpoint of cooling cylinder and deviates at 500mm to the right, induced duct into
Wind section 601, induced duct soaking zone 602, deduster blast pipe 801 and deduster discharge pipe 802 caliber be 150mm.
The pellet calcination rotary kiln product waste heat direct absorbing type recovery method of the present embodiment, basic step and 1 phase of embodiment
Together, the difference is that: the air quantity of blower 7 be 1000m3/h。
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (7)
1. a kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery method, it is characterised in that: include the following steps,
Step 1: opening the blower (7) and cyclone dust collectors in pellet calcination rotary kiln product waste heat direct absorbing type recovery system
(901), air is inhaled into cooling cylinder (5) inside from the inlet port and outlet port at cooling cylinder (5) both ends respectively, into cooling cylinder
(5) after internal air and pellet surface progress heat convection are heated, then pass through horizontal air inlet (1401) and lower air inlet
(1402) enter induced duct wind inlet section (601)；
Step 2: the hot-air into induced duct wind inlet section (601) is inhaled into blower (7) by induced duct soaking zone (602), and
Cyclone dust collectors (901), which are blasted, by blower (7) is dusted purification；
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 recycling to pellet calcination rotary kiln product waste heat；
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), direct absorbing type waste heat recovering mechanism and wind inlet section
Fixed device；Above-mentioned direct absorbing type waste heat recovering mechanism includes induced duct, blower (7) and cyclone dust collectors (901), the cooling cylinder
(5) inlet port and outlet port are open setting；
The induced duct includes induced duct wind inlet section (601) and induced duct soaking zone (602), and induced duct soaking zone (602) is located at
Between cooling cylinder (5) and blower (7), thermal insulation material is wrapped up in the outside of induced duct soaking zone (602)；Cyclone dust collectors (901)
Deduster air inlet (902) is equipped with deduster blast pipe (801), on the deduster air outlet (903) of cyclone dust collectors (901)
Equipped with deduster discharge pipe (802)；The input end of induced duct wind inlet section (601) protrudes into cooling cylinder (5) inside, induced duct wind inlet section
(601) outlet end is connected with the input end of induced duct soaking zone (602), the outlet end of induced duct soaking zone (602) and wind
The air inlet of machine (7) is connected, and the air outlet of blower (7) is connected with deduster blast pipe (801)；Deduster discharge pipe
(802) it is connected with the air intake of burner (1)；
The fixed device of above-mentioned wind inlet section includes cross bar (10), sunpender (11) and strut (12), and sunpender (11) is fixed on combustion chamber (2)
Outside support on, strut (12) fixes on the ground；The cross bar (10) runs through the inside of cooling cylinder (5), cross bar (10)
One end is mutually fixed with sunpender (11), and the other end and the strut (12) of cross bar (10) are mutually fixed；The induced duct wind inlet section (601) is solid
It is scheduled on cross bar (10)；The cyclone dust collectors (901) are set on cyclone dust collectors pedestal (13).
2. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 1, it is characterised in that: described
The air quantity of blower (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: described
The input end of induced duct wind inlet section (601) is known 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.
4. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 1, it is characterised in that: described
The downside of induced duct wind inlet section (601) is equipped with lower air inlet (1402), and lower air inlet (1402) is close to induced duct wind inlet section
(601) input end.
5. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 1, it is characterised in that: described
Cross bar (10) is fashioned iron；The thermal insulation material wrapped up on the outside of induced duct soaking zone (602) is heat-preservation cotton.
6. pellet calcination rotary kiln product waste heat direct absorbing type recovery method according to claim 4, it is characterised in that: described
Lower air inlet (1402) is 3~8 circular through holes, and the diameter of each circular through hole is 10~100mm, between adjacent circular through-hole
Away from for 20~150mm.
7. pellet calcination rotary kiln product waste heat direct absorbing type recovery method described in any one according to claim 1~6, special
Sign is: the input end of induced duct wind inlet section (601) is located at cooling cylinder (5) midpoint and is offset to both sides in the range of 0~500mm；
Induced duct wind inlet section (601), induced duct soaking zone (602), deduster blast pipe (801) and deduster discharge pipe (802) pipe
Diameter is 150~500mm.
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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 |
| CN107246803B (en) * | 2017-06-08 | 2019-05-03 | 东北大学 | A kind of recycling of soil conditioner cooling procedure waste heat with utilize device and method |
| CN107560445B (en) * | 2017-09-27 | 2019-02-15 | 重庆天志环保有限公司 | A kind of pellet calcination rotary kiln product waste heat direct absorbing type recovery system |
| 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 |
| CN109099718B (en) * | 2018-10-24 | 2024-04-12 | 株洲火炬工业炉有限责任公司 | Rotary kiln waste heat recovery system |
| 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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| CN104949537B (en) | 2017-07-14 |
| CN107449286A (en) | 2017-12-08 |
| CN104949537A (en) | 2015-09-30 |
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