CN104792183B - High temperature pellet waste heat recovery heat utilization device - Google Patents
High temperature pellet waste heat recovery heat utilization device Download PDFInfo
- Publication number
- CN104792183B CN104792183B CN201510126557.4A CN201510126557A CN104792183B CN 104792183 B CN104792183 B CN 104792183B CN 201510126557 A CN201510126557 A CN 201510126557A CN 104792183 B CN104792183 B CN 104792183B
- Authority
- CN
- China
- Prior art keywords
- cold house
- temperature
- pellet
- slow cooling
- cooling room
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Furnace Details (AREA)
Abstract
High temperature pellet waste heat recovery heat utilization device, including dodging cold house, slow cooling room, preheating chamber, reheat combustor and heat pipe bundle.High-temperature blower connects sudden strain of a muscle cold house's side bottom air vent and end face Venturi nozzle air inlet, slow cooling room is annulus column, heatproof blower fan connects slow cooling room air vent and injection tube, injection tube is close in the circular ring path of slow cooling room the back side after 360 ° of bulk material plates rotated, and bulk material plate scatters jet flow cooling pellet surface after pellet heap.The quench chamber bottom surface cold house's end face that eases up is coplanar.Moderate temperature heat pipe bundle pass perpendicularly through preheating chamber ease up cold house and two ends extension elongation equal, high-temperature hot tube bank tiltedly wear reheat combustor and dodge cold house and two ends extension elongation equal.Little or fluctuation the high temperature grain thing waste heat recovery heat utilization place of waste heat amount can use the present invention.Invention can produce the high temperature air resource of clean high-quality, can cool down pellet to less than 100 DEG C, preheated air to 800 DEG C～more than 900 DEG C, temperature efficiency > 85%, waste heat recovery efficiency > 70%.
Description
Technical field
The invention belongs to industrial energy saving field, relate to one and be applicable to high-temperature granular material or slag charge, such as height
Temperature clinker, high-temperature roasting sand, Zinc volatilization kiln high temperature leached mud waste heat recovery heat utilization place use
High temperature pellet waste heat recovery heat utilization device.
Background technology
Heat recovery engineering is " 12 " period China's second largest emphasis energy conservation project.According to the completeest
Full statistics, China's industrial exhaust heat can be with total amount being about 740 × 1012Kilojoule/year.Solid waste heat accounts for 30%,
Those waste heat amounts are big, waste heat quantity temperature constant, residual heat resources are concentrated, dust and corrosive substance content
Few most solid waste heats are recycled by steam-electric power approach.Little for waste heat amount,
Waste heat quantity temperature fluctuation, residual heat resources those residue pellet waste heats scattered carry out reclaiming heat utilization, are
Industrial energy saving effective way, but there is no ripe power-saving technology report at present.These stoves are because leaving stove
High temperature pellet waste heat there is no recovery at present and makes its thermal efficiency as little as 30%～40%.With sulfuric acid kiln it is
Example 850 DEG C～1050 DEG C from kiln solid-state mineral aggregate temperature, from kiln solid slag material temperature degree as a example by zinc rotary evaporation
Up to 1000 DEG C～1300 DEG C, these pellets particle diameter 3mm～5mm, because major part heat is by flue gas and pellet
Take away and cause the thermal efficiency less than 25%.High temperature pellet is wide, contains heat energy and is worth considerable, carries out waste heat recovery
Heat utilization, it has also become Energy-saving in Industrial Furnaces reduces discharging and builds the focus subject under discussion of amphitypy society.
Fixed bed heat exchanger is a kind of solid slag waste-heat recovery device, produces hot water/hot blast/steam, is used for giving birth to
Produce, generate electricity or other material of convection drying.Gu slag natural packing is in vertical/horizontal type fixed bed, in bed/
Outer layout water/forced air cooled tube, or air is uniformly random is heated through slag blanket.Heat exchanger tube is set and reclaims solid slag
Waste heat, such as (cylinder) lag cooler, dry slag extractor, dry quenching slag waste heat boiler etc., the gas grain coefficient of heat transfer little and
Heat exchange area is little, and bed temperature and heat exchange are uneven, and slag heat recovery rate is low.Heating homogeneous media is returned through bed
Receiving solid slag waste heat, as cement equipment shaft kiln, fixed bed coal gasifier etc., bed temperature and heat exchange are uniform, gas grain changes
Hot coefficient is little but heat exchange area is significantly widened, and therefore slag heat recovery rate is high, and its shortcoming is that air needs very
Big pressure just can overcome slag layer resistance, there is wall effect, temperature field effect and funneling effect simultaneously.
Moving bed heat exchanger is another kind of solid slag waste-heat recovery device, the grog cooling used such as supporting rotary cement kiln
Machine, fluidized bed heat exchanger device etc..Grate-cooler is a kind of stable-flow advancing type high temperature chamotte highly efficient cooling device,
The grog that kiln hood falls promotes forward with grate plate and is paved with whole grate, and cold wind is by multiple pressure stabilizing chambers under grate
Heated uniformly across bed.Grate-cooler belongs to integral movable type fixed bed heat exchanger, and structure is complicated
Technology requires height, and bed is vertically without obvious displacement.Normal temperature air is dispersed also cross difference
Section grate plate, the simultaneously grog of different temperatures in cooling grate, grate inducer high temperature air returns in stove
Combustion-supporting, in interlude, warm air is sent to waste heat boiler and generates electricity, outlet section Cryogenic air cogeneration skill
Art is still in research and development are promoted.Grog is down to less than 100 DEG C by 1400 DEG C, and heat recovery rate is more than 75%.Fluidisation
Bed heat exchanger heat exchange area is big, and heat recovery rate is high, but the commercial market product of maturation is rare.
Development structure is simple, and control is good, can high efficiente callback quantity is few, quantity temperature fluctuation, there is powder
The high temperature pellet waste heat of dirt and Korrosionsmedium, the most efficiently the high temperature pellet waste heat recovery diarrhea of heat type of preheated air
With device, there is good economy, energy-conserving and environment-protective and social benefit.
Summary of the invention
In order to overcome, tradition fixed bed heat exchanger gas grain heat exchange area is little and heat exchange is uneven, or needs high pressure empty
Gas and there is limit wall, temperature field and funneling effect, moving bed heat exchanger parallel connection cooling kiln slag, air preheat
The shortcomings such as temperature is the highest, the present invention announces a kind of integrated " heat transfer of Venturi nozzle gas grain biphase flash, grain
Material layering scatter-airjetting heat transfer, heat exchange of heat pipe series connection heat transfer " etc. principle, have " high temperature pellet lower the temperature
To 100 DEG C and less, preheated air is to less than pellet inlet temperature 100 DEG C～150 DEG C " etc. technical advantage
High temperature pellet waste heat recovery heat utilization device.
High temperature pellet waste heat recovery heat utilization device, mainly include dodge cold house, slow cooling room, pellet de-registration mechanism,
Preheating chamber, reheat combustor and heat pipe bundle, dodge cold house and mainly include Venturi nozzle and high-temperature blower, high-temperature blower
Air entry connects sudden strain of a muscle cold house side bottom air vent, and high-temperature blower air vent connects Venturi nozzle air inlet,
Venturi nozzle is vertically mounted on sudden strain of a muscle cold house end face, and dodging cold house is semicolumn-square column assembly shape, square column one
Individual side and semicolumn side plane overlap, and Venturi nozzle axis is by dodging the end face circular arc center of circle, cold house, slow cooling
Room includes dump skip, heatproof blower fan and injection tube, and slow cooling room is annulus column, slow cooling room circular ring path height
Being equal to dodge cold house's end face arc diameter with width, slow cooling ceiling anchor ring centrage comprises sudden strain of a muscle bottom surface, cold house circle
The arc center of circle, dodge bottom surface, cold house ease up tip circle anchor ring overlapping region, cold house hollow out be slow cooling room charging aperture and dodge cold house
Discharge gate, anchor ring at the bottom of slow cooling room offers little fan-shaped discharge gate, and fan-shaped discharge gate connects dump skip charging aperture,
Dump skip top side wall arranges air vent, and air vent connects heatproof blower fan air entry, and heatproof blower fan air vent is even
Connecing injection tube air inlet, injection tube uniformly offers the little spray orifice that numerous central axis upright is downward, and pellet scatters
Mechanism includes cantilever and bulk material plate, and bulk material plate is vertically arranged, bulk material plate top margin and cantilevered distal end are welded to connect,
Injection tube is close to the back side after bulk material plate, and cantilever, around slow cooling room central axis 360 ° rotation, drives bulk material plate and spray
Blowpipe at the uniform velocity moves in the circular ring path of slow cooling room, and bulk material plate is uniform for the pellet heap in whole annular width direction
Scattering, injection tube carries out jet flow cooling subsequently, and preheating chamber is annulus column, anchor ring at the bottom of preheating chamber and slow cooling
Ceiling anchor ring overlaps, and preheating chamber height and sudden strain of a muscle cold house end face arc radius are equal, and reheat combustor is rectangular-shaped,
Cuboid length-width ratio is 2:1, cuboid width and to dodge cold house end face arc radius equal, the big side of reheat combustor and
Dodging circular arc side, cold house institute to overlap square column side, reheat combustor air inlet connects preheating chamber air vent, heat pipe bundle
The moderate temperature heat pipe bundle that the high-temperature hot tube bank arranged including uniform parallel and uniform parallel are arranged, moderate temperature heat pipe bundle hangs down
Direct puncture cross preheating chamber ease up cold house's common circle anchor ring and two ends extension elongation equal, high-temperature hot tube bank and horizontal plane
30 °～75 ° of the angle of cut tiltedly wears reheat combustor and sudden strain of a muscle common side, cold house and two ends extension elongation is equal.
There is the high-temperature granular thing of " waste heat amount is little, waste heat amount temperature fluctuates, residual heat resources are disperseed " feature
Material, high-temperature granular slag charge, high-temperature fusant granulation material waste heat recovery heat utilization, such as Cement Clinker, height
The temperature place, Energy-saving in Industrial Furnaces field such as roasting sand, Zinc volatilization kiln high temperature leached mud, it is possible to use the present invention.
Invention energy-saving benefit is notable.Application shows: inventive structure is simple, auxiliary equipment configuration is simple, energy
Produce clean, the high temperature air resource of high-quality.1000 DEG C～1300 DEG C of high temperature pellets can cool
100 DEG C and less, air at room temperature can efficiently be preheating to 800 DEG C～900 DEG C and more than, temperature efficiency exceedes
85%, pellet waste heat recovery efficiency is more than 70%.
Accompanying drawing explanation
Fig. 1 is high temperature pellet waste heat recovery heat utilization device vertical cross-sectional view, and Fig. 2 is that high temperature pellet waste heat returns
Receive heat utilization device horizontal sectional drawing.In Fig. 1 and Fig. 2,1 for dodging cold house, and 2 is slow cooling room, and 3 is pellet
De-registration mechanism, 4 is preheating chamber, and 5 is reheat combustor, and 6 restrain for high-temperature hot, and 7 is moderate temperature heat pipe bundle, and 11 are
Venturi nozzle, 12 is high-temperature blower, and 13 for dodging cold house 1 and the common side of reheat combustor 5, and 14 for dodging cold house
1 circular arc side, 21 is dump skip, and 22 is heatproof blower fan, and 23 is injection tube, and 24 is slow cooling room 2 and preheating
Room 4 common circle anchor ring, 31 is cantilever, and 32 is bulk material plate.
Detailed description of the invention
Below in conjunction with the accompanying drawings invention is further described.
As shown in Figures 1 and 2, high temperature pellet waste heat recovery heat utilization device, mainly include dodging cold house
1, slow cooling room 2, pellet de-registration mechanism 3, preheating chamber 4, reheat combustor 5, high-temperature hot tube bank 6 and moderate temperature heat pipe
Bundle 7.
Dodge cold house 1 and include Venturi nozzle 11 and high-temperature blower 12.Dodge the semicolumn that cold house 1 is arranged vertically
The complex shape combined with the square column vertically arranged, one side of square column and semicolumn side plane are the heaviest
Closing, the relative square column side bottom in circular arc side 14 arranges an air vent, air vent and be positioned at sudden strain of a muscle cold house 1
Outside high-temperature blower 12 air entry with high-temperature blower 12 suction nozzle connect, high-temperature blower 12 air vent and literary composition
Nozzle 11 air inlet connection in mound, Venturi nozzle 11 is vertically installed on sudden strain of a muscle cold house 1 end face, literary composition mound
In nozzle 11 central axis by dodge the end face circular arc center of circle, cold house 1.
Slow cooling room 2 includes dump skip 21, heatproof blower fan 22 and injection tube 23.Slow cooling room 2 in annulus column,
The annulus post vertical section crossing central axis is the length of side and dodges the square-section that cold house 1 end face arc diameter is equal.
The square-section length of side and sudden strain of a muscle cold house 1 end face arc diameter are equal, i.e. slow cooling room 2 circular ring path width and height
All equal with sudden strain of a muscle cold house 1 end face arc diameter.Slow cooling room 2 end face and sudden strain of a muscle bottom surface, cold house 1 are coplanar, dodge cold house 1
The circular arc center of circle, bottom surface on the tip circle anchor ring centrage of slow cooling room 2, slow cooling room 2 tip circle anchor ring and dodge the end, cold house 1
Overlapping region, face hollow out eases up cold house 2 charging aperture, i.e. slow cooling room 2 tip circle anchor ring for dodging cold house 1 discharge gate
Sudden strain of a muscle cold house 1 pellet is not stoped to limits to fall in slow cooling room 2.Slow cooling room 2 end anchor ring offers little fan
Shape discharge gate, fan-shaped discharge gate two arcuate midway point line prolongation intersects at by the vertical central axis in slow cooling room 2.
Fan-shaped discharge gate connects dump skip 21 charging aperture, dump skip 21 in being inverted prism-frustum-shaped, fan-shaped nesting population size
Identical with dump skip 21 feed gap dimension, gradually contract along vertical downward direction dump skip 21 cross-sectional area
Little, the dump skip 21 charging aperture width cold house 2 circular ring path width that eases up is equal, short circular arc arc length be 10mm～
15mm.All the time retain the pellet to be arranged of certain altitude in dump skip 21, flow to slow cooling blocking cool ambient air
In room 2.Dump skip 21 top side wall arranges slow cooling room 2 air vent, slow cooling room 2 air vent and heatproof blower fan
22 air entries heatproof blower fan 22 suction nozzle connects, and heatproof blower fan air vent and injection tube 23 air inlet are with resistance to
Warm air machine 22 exhaustor connects, and heatproof blower fan 22 suction nozzle is installed pellet drainage screen and pressure vacuum gauge,
Pressure vacuum gauge registration too low expression pellet drainage screen is blocked by pellet, needs labor cleaning to safeguard.Injection tube
23 uniformly offer the tiny spray orifice that numerous central axis upright is downward, and injection tube 23 length is eased up cold house 2 annulus
Channel width is equal.Slow cooling room 2 circular ring path design, shortens workshop length, it is achieved high-efficiency compact is arranged
Slow cooling room 2.
Multiple sudden strain of a muscle cold house 1, the most multiple sudden strain of a muscle cold houses 1 can be evenly arranged along slow cooling room 2 tip circle anchor ring circumferencial direction
One slow cooling room 2 of common connection.
Pellet de-registration mechanism 3 includes reducing motor, cantilever 31 and bulk material plate 32.Bulk material plate 32 width eases up
Cold house 2 circular ring path width is equal, and bulk material plate 32 is vertically arranged, bulk material plate 32 top margin and cantilever 31 end
It is welded to connect.Cantilever 31 around slow cooling room 2 central axis 360 ° rotation, drives bulk cargo under reducing motor drives
Plate 32 the most inswept slow slow cooling room 2 circular ring path.Planomural face, two ends, inner circle side, slow cooling room 2 is shut,
Inner circle side level at the height of bottom surface 3/8 disconnects 30mm～40mm, for cantilever 31 in same level
360 ° of external leakages of non-resistance depletion of QI rotate freely.Radian can be waited radially to arrange multiple cantilevers 31.Arrange
During multiple cantilever 31, equidistant from slow cooling room 2 floor height along cantilever 31 direction of rotation bulk material plate 32 base
Arrange.Heatproof blower fan 22 exhaustor passes pellet de-registration mechanism 3 rotary shaft, turns back and is close to cantilever 31 after 90 °,
Finally being connected with injection tube 23 air inlet, injection tube 23 is close to the back side after bulk material plate 32, and with cantilever 31
Rotate together, in order to the pellet heap in the whole annular width direction of bulk material plate 32 uniformly scatters, injection tube subsequently
23 carry out jet flow cooling.
Preheating chamber 4 is in annulus column, and annulus post height and sudden strain of a muscle cold house 1 end face arc radius are equal.Preheating chamber 4
The anchor ring cold house 2 tip circle anchor ring that eases up in the end is completely superposed, i.e. this anchor ring be slow cooling room 2 and preheating chamber 4 altogether
With anchor ring 24.Reheat combustor 5 is in rectangular-shaped, and cuboid length-width ratio is 2:1, and cuboid width and sudden strain of a muscle are cold
Room 1 end face arc radius is equal, the big side of cuboid and dodge circular arc side, cold house 1 14 to square column side
Being completely superposed, i.e. this side is for dodging cold house 1 and the common side 13 of reheat combustor 5.Reheat combustor 5 is arranged in slow cooling
Inside the annulus post of room 2.Reheat combustor 5 air inlet directly connects with preheating chamber 4 air vent or connects with insulating tube.
Preheating chamber 4 circular ring path designs, and shortens workshop length, it is achieved high-efficiency compact arranges preheating chamber 4.
Heat pipe bundle includes high-temperature hot tube bank 6 that uniform parallel arranges and the moderate temperature heat pipe bundle 7 that uniform parallel is arranged.
Moderate temperature heat pipe bundle 7 passes perpendicularly through preheating chamber 4 and eases up cold house 2 common circle anchor ring 24, and two ends extension elongation is equal,
I.e. moderate temperature heat pipe bundle 7 put in preheating chamber 4 length and moderate temperature heat pipe bundle 7 to put in slow cooling room 2 length equal, stretch
Go out length and sudden strain of a muscle cold house 1 end face arc radius is equal.Dodge cold house 1, dodge between cold house 1 and dump skip 21
Moderate temperature heat pipe bundle 7 is not arranged in short arc anchor ring region, slow cooling room 2.High-temperature hot tube bank 6 is tiltedly worn reheat combustor 5 and dodges
Common side 13, cold house 1, high-temperature hot tube bank 6 and horizontal plane angle are 30 °～75 °, and two ends extension elongation is i.e.
High-temperature hot tube bank 6 put in reheat combustor 5 length and high-temperature hot tube bank 6 to put in sudden strain of a muscle cold house 1 length equal, projection
Equal to horizontal plane Shang Shan cold house 1 heat pipe length and sudden strain of a muscle cold house 1 end face arc radius.
Reheat combustor 5 and sudden strain of a muscle cold house 1 through reheat combustor 5 and do not dodge common side, cold house 1 because of high-temperature hot tube bank 6
13 and collaborate.Except high temperature pellet falls from Venturi nozzle 11 feed pipe, dodge cold house 1 discharge gate and ease up cold house
Outside 2 charging aperture connections, dodge cold house 1 gas and do not gang up with the external world.Preheating chamber 4 ease up cold house 2 not because of in warm
Tube bank 7 is eased up cold house 2 common circle anchor ring 24 through preheating chamber 4 and is collaborated.Except slow cooling room 2 charging aperture connects
Dodge cold house 1 discharge gate, outside slow cooling room 2 discharge gate connection dump skip 21 charging aperture, slow cooling room 2 gas not with
The external world gangs up.Regulation high-temperature blower 12 and heatproof blower fan 22 flow so that dodge cold house 1 ease up cold house 2 it
Between occur without phenomenon of substantially collaborating.
Dodge cold house 1, slow cooling room 2, preheating chamber 4 and reheat combustor 5, high-temperature blower 12 suction nozzle and exhaustor,
Heatproof blower fan 22 suction nozzle and exhaustor, all lay heat-insulation layer, it is ensured that outside wall surface temperature < 60 DEG C～70 DEG C.
Invention operation principle is described as follows:
1000 DEG C～1300 DEG C of high temperature pellets by Venturi nozzle 11 feed pipe to nozzle throat port area.High temperature
The middle warm air that blower fan 12 is brought gathers in nozzle air chamber, and air is high by speed during nozzle throat port area
Reach 40m/s and more than, air-flow high intensity turbulent flowing cause pellet surface to be rubbed by strong axle/radial air flow
Power effect, air-flow and pellet are sufficiently mixed, and pellet flash is lowered the temperature, and middle temperature circulating current flash heats up and becomes high
Temperature circulating current.Dodge cold house 1 inner nozzle tissue gas grain mixture the most quickly to flow along nozzle centre axis region
Dynamic, the biphase scraping heat exchange of gas grain is continued until that mixture falls to dodge cold house 1 medium height position.?
Under high-temperature blower 12 drives, dodging cold house 1 air vent near zone is negative pressure region.Gas grain mixture leaves spray
After mouth, effluxvelocity gradually decays, and bottom sudden strain of a muscle cold house 1, under suction function, jet is gradually deviated from nozzle center
Flowing in axis region, gradually passes perpendicularly through high-temperature hot tube bank 6, between high temperature circulation air-flow-high-temperature hot tube bank 6
Radiation and heat convection effect gradually strengthen.Pellet stream is controlled in Venturi nozzle 11 central axis region
Flowing, weakens the high temperature pellet scouring corrosion damage effect that high-temperature hot tube bank 6 is subject to.Leave sudden strain of a muscle cold house 1
Time pellet be cooled to 500 DEG C～600 DEG C.The circulating current that high-temperature blower 12 drives is as heat-carrying agent, at literary composition
In mound, nozzle 11 throat region flash absorbs pellet sensible heat, continues flash absorption pellet and show when flowing to dodge cold house 1
Heat, starts simultaneously at flash convection heat transfer' heat-transfer by convection and restrains 6 to high-temperature hot.High-temperature blower 12 drives and dodges air-flow in cold house 1
Quickly flowing.Jet flows fast through nozzle throat port area and dodges cold house 1 upper semisection area of space, both enhances
Nozzle throat port area gas grain biphase radiation and convection heat exchange effect, again enhance sudden strain of a muscle cold house 1 in high temperature circulation air-flow-
High-temperature hot restrains 6 heat convection effects.Pellet drainage screen and vacuum meter are installed on high-temperature blower 12 suction nozzle,
Vacuum meter registration too low expression pellet drainage screen is needed labor cleaning to safeguard by pellet blocking.High-temperature hot tube bank 6
30 °～75 ° layouts of horizontal tilt, can effectively in tissue hyperthermia heat pipe bundle 6 heat-carrying agent circulate.
In high-temperature hot tube bank 6, the metal medium such as sodium evaporates rapidly, then rises by heat buoyancy, anxious at reheat combustor 5
Rapid hardening is tied, then by self gravitation effect along tipping tube wall sinking backflash cold house 1.Dodge cold house 1 inner chamber
High 4m～6m, pellet stream falls to bottom surface from sudden strain of a muscle cold house 1 end face in 1 second～2 seconds, it is simply that short by 1
Second～2 second time in complete the cooling heat release from 1000 DEG C～1300 DEG C of high temperature to 500 DEG C～600 DEG C middle temperature
Journey, and heat release flash is passed to heat-carrying agent in high-temperature hot tube bank 6, it is achieved pellet stream-high-temperature hot tube bank 6
Flash heat transfer between heat-carrying agent stream, high temperature pellet dodges cold process.
After slow cooling room 2 dropped into by 500 DEG C～600 DEG C middle temperature pellets, gradually pile up for granule stockpile.Along with cantilever
31 constantly rotate, bulk material plate 32 the most at the uniform velocity passage pellet heap, and slowly the most uniformly scatter pellet along anchor ring,
Make to be deposited in the middle temperature of the fresh granules within stockpile surface can constantly expose out, subsequently from injection tube 23
The numerous tiny low temperature jet flow flowed out vertically is jetted the fresh middle temperature pellet surface just exposed, it is ensured that middle temperature grain
Material can further fast cooling.After low temperature jet flow air-flow sweeps away the middle temperature pellet surface of winding-up, fast endothermic heats up
Become middle warm air.Under thermal buoyancy effect effect, middle warm air flows up, then at top, slow cooling room 2
Flow in moderate temperature heat pipe bundle 7 region, heat absorption is passed to heat-carrying agent in moderate temperature heat pipe bundle 7, becomes low temperature
Air-flow.Heatproof blower fan 22 drives and makes dump skip 21 charging aperture near zone become negative pressure region.Low-temperature airflow
Rotate with cantilever 31 and flow to dump skip 21 position along slow cooling room 2 circular ring path, then entered by air vent
Enter heatproof blower fan 22 suction nozzle.Comparing with dodging cold house 1, slow cooling room 2 pellet temperature is only 500 DEG C～600
DEG C, the biphase radiation heat transfer of gas grain can be ignored, and the gas grain biphase heat convection temperature difference is little, and pellet temperature-fall period delays
Slowly, the strengthening biphase heat exchange of gas grain is the most necessary.On the one hand, heatproof blower fan 22 drives and makes air-flow in slow cooling room 2
Circulate, enhance middle warm air-moderate temperature heat pipe bundle 7 convection heat transfer intensity, on the other hand, heatproof blower fan
22 provide the low-temperature airflow of big pressure potential to enter injection tube 23, will through the numerous tiny spout of injection tube 23
Big pressure potential is changed into big speed kinetic energy, applies low-temperature airflow impact stagnation active force to middle temperature pellet surface,
Enhance low-temperature airflow-middle temperature pellet convection heat transfer intensity.Organic media evaporation in moderate temperature heat pipe bundle 7, then
Rise by heat buoyancy, condense at preheating chamber 4, then decline along VERTICAL TUBE wall by self gravitation effect
Flow back to slow cooling room 2.Middle temperature pellet only experience low-temperature airflow winding-up cooling procedure just cool to 100 DEG C and with
Under.Installing pellet drainage screen and pressure vacuum gauge on heatproof blower fan 22 suction nozzle, pressure vacuum gauge registration is too low
Represent that pellet drainage screen is blocked by pellet, need labor cleaning to safeguard.Dump skip 21 maintains material envelope effect all the time,
To stop extraneous cryogenic gas to penetrate into slow cooling room 2.According to pellet amount, how many and pellet bulk thickness, determines cantilever
31 and bulk material plate 32 and the suitable quantity of injection tube 23.
Under aerator drives, cold air enters preheating chamber 4, quilt in preheating chamber 4 from preheating chamber 4 air inlet
Moderate temperature heat pipe bundle 7 is slowly preheating to 300 DEG C～400 DEG C of low temperature level, leaves from preheating chamber 4 air vent, connects
And enter reheat combustor 5 directly through reheat combustor 5 air inlet, added rapidly by high-temperature hot tube bank 6 in reheat combustor 5
Heat is put down to warm water in 800 DEG C～900 DEG C, even lower 100 DEG C～150 DEG C, finally from reheating than pellet temperature
Room 5 air vent leaves reheat combustor 5.
Heatproof blower fan 22 and high-temperature blower 12 require to select low discharge big pressure head blower fan.More than recyclable pellet
Under heat permanence condition, sudden strain of a muscle cold house 1 to be improved and flow out air themperature, need to limit preheating chamber 4 and blast air
Flow, and circulate air-flow (middle heat-carrying agent) flow dodging cold house 1 and slow cooling room 2.Identical
Under the conditions of heat output, slow cooling room 2 cold cycle air flow rate is the biggest, and circulating current heats up the lowest, air stream
Go out air preheater 4 temperature the lowest.Under the conditions of identical heat output, dodge cold house 1 middle temperature circulating current flow
The biggest, circulating current heats up the lowest, and it is the lowest that air flows out sudden strain of a muscle cold house 1 temperature.
High-temperature hot tube bank 6 puts in sudden strain of a muscle cold house 1 degree of depth and sudden strain of a muscle cold house 1 end face arc radius is equal, it can be ensured that
Pellet not erosion corrosion heat pipe, had both extended heat pipe service life, ensured that again high temperature circulation air-flow-heat pipe connects as early as possible
Touch and occur efficient convection current radiation heat transfer effect, strengthen high temperature pellet-heat pipe radiation heat transfer effect.Moderate temperature heat pipe
Bundle 7 puts in slow cooling room 2 degree of depth and to dodge cold house 1 end face arc radius equal, can allow on middle temperature circulating current
Rise the shortest height just and heat pipe contact, and strengthen circulating current-heat pipe heat convection effect.Reheat combustor 5 width
It is equal with preheating chamber 4 height and sudden strain of a muscle cold house 1 end face arc radius, it can be ensured that air completely extends across heat pipe district,
Occur around superheater tube district or short circuit phenomenon without air, it is ensured that air uniformly absorbs heat, improve adopting heat pipes for heat transfer efficiency.
Inventive structure feature, technical characteristic and the complex art effect brought are described in detail as follows:
One of architectural feature that invention has is " to dodge cold house 1-slow cooling room 2 to connect, preheating chamber 4-reheat combustor 5
Series connection, high temperature pellet-Cryogenic air heat pipe counter flow heat exchange ".Dodge cold house 1, slow cooling room 2, preheating chamber 4 and again
Hot cell 5 is independently arranged, and strengthens pellet-air diabatic process Modulatory character.Dodge cold house 1 and reheat combustor 5 dodges cold
With high-temperature hot tube bank 6 heat transfer between room 1, conduct heat with moderate temperature heat pipe bundle 7 between slow cooling room 2 and preheating chamber 4,
Replacing tradition poor efficiency metal partition-wall heat transfer or sheet metal partition-wall heat transfer with ribbing, heat transfer efficiency improves, heat-transfer surface
Long-pending minimizing, heat-exchanger rig physical dimension becomes compact.High-temperature hot restrain 6 built-in low boiling metal heat-carrying agents (as
Sodium etc.), the organic heat-carrying agent of the built-in low boiling of moderate temperature heat pipe bundle 7.Dodge cold house 1 and be arranged on slow cooling room 2,
Slow cooling room 2 passage is circular ring path, reheat combustor 5 and sudden strain of a muscle cold house 1 same side plane 13, slow cooling room 2 altogether
With preheating chamber 4 same anchor ring 24 altogether, preheating chamber 4 is arranged on slow cooling room 2, and reheat combustor 5 is installed
Inside slow cooling room 2, reduce spatial volume and the area of plane shared by device, save and once invest.
Two Shi Shan cold houses 1 of the architectural feature that invention has arrange " Venturi nozzle 11-high-temperature blower 12 ",
Slow cooling room 2 arranges " 360 ° of bulk material plate 32+ injection tube 23-heatproof blower fans 22 rotated ".Dodge cold house 1 end face
Right angle setting Venturi nozzle 11.High-temperature blower 12 drives and dodges circulation of air flow flowing in cold house 1, for nozzle
Throat region provides strong turbulence intensity cooling wind.By pellet self gravitation effect, pellet pushes up from dodging cold house 1
Face vertical drop, gas-particle turbulent mixes, saves other type heat exchangers and move pellet and air-flow stream
Dynamic need overcome the required exterior power expenses such as pellet layer resistance.Fixed bed heat exchanger particle position and air-flow
Entry position immobilizes, and drives with aerator and improves stream pressure, allows air-flow at random through static granule
Gap, it is impartial that statistical analysis understands air-flow-pellet touch opportunity, thus enhances gas grain contact heat-exchanging, but
Being that required air-flow static pressure is the highest, overwhelming majority static pressure consumption is overcoming air-flow to flow between subparticle gap
On drag losses, the air velocity contacted with pellet surface is the least.Fluid-bed heat exchanger air flow inlet position
Constant, aerator drives and improves stream pressure relief air-flow picking-up granule away from origin-location, granule
Position changes in zonule, by random equal in particle position change, air-flow space between particles
Uniform flow is dynamic, air-flow scraping pellet surface speed improves, and adds the approach such as gas grain prolongation time of contact, strengthening
Gas grain contact heat-exchanging, but air-flow static pressure high flow capacity is big, limits gas flow temperature amplitude of variation after heat exchange.
Comb type cooling bed heat exchanger strengthening gas grain heat transfer theory is similar to fixed bed heat exchanger, the gas contacted with pellet surface
Flow Velocity is little, and except for the difference that pellet moves with grate and slowly moves, and air-flow static pressure decreases.Pellet
Annealer 2 bulk material plate 32 with injection tube 23, slow uniform motion in pellet annealer 2 circular ring path.
The bulk material plate 32 middle temperature pellet surface-little jet that uniformly scatters vertically is jetted and strong cooled down middle temperature pellet mode and substitute
Fixed bed high pressure draught is through pellet layer surface and Convective heat tranfer cooling mode occurs, and instead of fluid bed
The fluidising granules heat exchange type of cooling, required air-flow static pressure low discharge is little, and heat transfer intensity is because of winding-up impact
It is greatly improved.
One of technical characteristic that said structure feature causes is Venturi nozzle gas grain biphase flash heat transfer skill
Art.Pellet temperature is up to 1000 DEG C～1300 DEG C, should avoid directly contacting with high-temperature hot tube bank 6, need
Heat-carrying agent in the middle of introducing.In conjunction with Flash furnace gas grain heat and mass principle, Venturi nozzle 11 is set,
This nozzle pellet treating capacity is changeable, simple in construction, and the mixing of gas grain is prone to regulation and control.Venturi nozzle 11
Being provided with air chamber, air chamber air vent connects nozzle aditus laryngis.Nozzle throat port area gas flow jet speed is big,
In negative pressure, pellet can be accelerated；Nozzle throat port area is that air current flow turbulence intensity is big, has gas grain two
Contact good mixing physical condition, can complete pellet flash cooling when leaving sudden strain of a muscle cold house 1 to pellet
Process, becomes black from redness；Jet control pellet stream flows at nozzle centre axis near zone, protects
Protect high-temperature hot tube bank 6 from pellet stream high temperature erosion-corrosion.
The two of the technical characteristic that said structure feature causes are high-efficiency heat pipe heat transfer technologies.Heat pipe is a kind of efficient
Heat transfer unit (HTU), heat transfer efficiency is up to more than 90%.High-temperature hot is restrained 6 two ends and is put in sudden strain of a muscle cold house 1 and reheating respectively
Room 5, dodges cold house 1 high temperature circulation air-flow heat-carrying and can the most quickly be delivered to warm air stream in reheat combustor 5, make height
Temperature circulating current becomes middle temperature circulating current, and middle warm air stream becomes high temperature air stream.In view of upright side walls face
Separate warm air stream in sudden strain of a muscle cold house 1 high temperature circulation air-flow and reheat combustor 5, high-temperature hot tube bank 6 inclination 30 °～75 °
Mounting arrangements.Moderate temperature heat pipe bundle 7 two ends put in slow cooling room 2 and preheating chamber 4 respectively, and the middle temperature in slow cooling room 2 circulates
Air-flow heat-carrying can the most quickly be delivered to preheating chamber 4 Cryogenic air stream, makes middle temperature circulating current become low temperature and follows
Ring air-flow, Cryogenic air stream becomes middle warm air stream.In view of horizontal plane separates slow cooling room 2 middle temperature circulating current
With air slow cooling room 2 Cryogenic air stream, the vertically-mounted layout of moderate temperature heat pipe bundle 7.
The three of the technical characteristic that said structure feature causes are that pellet is layered the cooling technology that scatters.Pellet has
The characteristics such as numbers of particles is many, surface area is big, its heat transfer difficulty is air-flow-pellet uniform contact and height occurs
Effect heat convection.Pellet annealer 2 integrated multiple hearth furnace gas grain heat and mass advantage, bulk material plate 32 is circumferentially
Pellet heap is moved in direction, is positioned at the fresh middle temperature pellet surface within pellet heap and is constantly exposed to outermost layer,
Then vertically jet fresh middle temperature pellet surface from injection tube 23 numerous little jet out.Low-temperature airflow sprays
Stream impact stagnation cooling, strengthening flow-pellet Convective Heat Transfer.
The four of the technical characteristic that said structure feature causes are pellet jet flow cooling technologies.In pellet heap fresh
Middle temperature pellet surface cools down after exposing, and impact stagnation cooling of vertically jetting according to numerous little jets realizes.Low
The impact stagnation cooling of warm air jet flow, strengthening flow-pellet Convective Heat Transfer, improves pellet annealer 2
Heat transfer efficiency.As air spouting velocity 20m/s～30m/s overall heat-transfer coefficient reach 46W/ (m.K)～
58W/ (m.K), approximates lamellar and 1.7 times of tubular exchanger～3 times, and per kilogram metal heat-exchange amount is
Fin-tube Heat Exchangers 1.6 times～2.8 times, and air drag is only 400Pa～100Pa, with other types heat exchange
Device is compared, and its drag losses is little, additionally simple in construction, volume is little, cost is low, reliable operation, easily
In maintenance.
The complex art effect that said structure feature and technical characteristic bring is: one is to produce clean high temperature sky
Gas.Dodge and do not collaborate mutually between cold house 1-slow cooling room 2 and preheating chamber 4-reheat combustor 5, can guarantee that high temperature air
Clean level.Two is to produce high-quality high temperature air.Limit and dodge cold house 1 middle temperature circulating current flow, slow cooling
Room 2 cold cycle air flow rate and preheating chamber 4 blast air mass flow, and it is direct to make preheating chamber 4 flow out air
Flow into reheat combustor 5, by pellet-air hot pipe countercurrent heat-transfer technology, can produce lower by 100 than pellet inlet temperature
DEG C～the high temperature air stream of 150 DEG C of temperature levels, meet stove dreg waste heat recovery heat utilization and high temperature air help
The furnace energy-saving places such as combustion need.Three is to realize the exhaust heat stepped recovery heat utilization of high temperature pellet, decreases remaining
Irreversible thermodynamics loss in recuperation of heat.Four is to improve economical operation benefit, improves kiln slag waste heat and returns
Produce effects rate, can be by stove granulate cooling to 100 DEG C and following.Five are a simplified apparatus structure and auxiliary equipment
Configuration, floor space and space are few, and mechanical moving element is few, and power consumption is few, failure rate is low.
Have " waste heat amount is little, waste heat amount or temperature fluctuation, resource dispersion " feature, particle diameter less than 10mm～
The high-temperature granular material of 15mm, high-temperature granular slag charge, high-temperature fusant granulation material waste heat recovery heat utilization, as
The places, Energy-saving in Industrial Furnaces field such as Cement Clinker, high-temperature roasting sand, Zinc volatilization kiln high temperature leached mud,
The present invention can be used.
Commercial Application shows: invention society, economic and energy saving remarkable benefit.Inventive structure is simple, auxiliary
Equipment configuration is simple, and mechanical moving element is few, failure rate is low, can produce high temperature clean, high-quality empty
Gas resource.High temperature pellet can be cooled 100 DEG C and less by 1000 DEG C～1300 DEG C, air-energy high-efficiency
Be preheating to 800 DEG C～900 DEG C and more than, temperature efficiency > 85%, pellet heat recovery efficiency > 70%.
Claims (1)
1. high temperature pellet waste heat recovery heat utilization device, mainly includes dodging cold house, slow cooling room, and pellet scatters machine
Structure, preheating chamber, reheat combustor and heat pipe bundle, dodge cold house and mainly include Venturi nozzle and high-temperature blower, high temperature
Blower fan air entry connects sudden strain of a muscle cold house side bottom air vent, and high-temperature blower air vent connects Venturi nozzle air inlet
Mouthful, Venturi nozzle is vertically mounted on sudden strain of a muscle cold house end face, and dodging cold house is semicolumn-square column assembly shape, side
One side of post and semicolumn side plane overlap, Venturi nozzle axis by dodging the end face circular arc center of circle, cold house,
Slow cooling room includes dump skip, heatproof blower fan and injection tube, and slow cooling room is annulus column, slow cooling room circular ring path
Height and width are equal to dodge cold house's end face arc diameter, and slow cooling ceiling anchor ring centrage comprises at the bottom of sudden strain of a muscle cold house
The circular arc center of circle, face, dodging bottom surface, cold house tip circle anchor ring overlapping region, cold house hollow out of easing up is slow cooling room charging aperture and sudden strain of a muscle
Cold house's discharge gate, anchor ring at the bottom of slow cooling room offers little fan-shaped discharge gate, fan-shaped discharge gate connection dump skip charging
Mouthful, dump skip top side wall arranges air vent, and air vent connects heatproof blower fan air entry, heatproof blower fan aerofluxus
Mouth connects injection tube air inlet, and injection tube uniformly offers the little spray orifice that numerous central axis upright is downward, pellet
De-registration mechanism includes cantilever and bulk material plate, and bulk material plate is vertically arranged, bulk material plate top margin and cantilevered distal end welding are even
Connecing, injection tube is close to the back side after bulk material plate, and cantilever, around slow cooling room central axis 360 ° rotation, drives bulk material plate
At the uniform velocity moving in the circular ring path of slow cooling room with injection tube, bulk material plate is the pellet heap in whole annular width direction
Uniformly scattering, injection tube carries out jet flow cooling subsequently, and preheating chamber is annulus column, anchor ring at the bottom of preheating chamber and
Slow cooling ceiling anchor ring overlaps, and preheating chamber height and sudden strain of a muscle cold house end face arc radius are equal, and reheat combustor is rectangular
Body shape, cuboid length-width ratio is 2:1, and cuboid width and sudden strain of a muscle cold house end face arc radius are equal, and reheat combustor is big
Square column side is overlapped by side and sudden strain of a muscle circular arc side, cold house institute, and reheat combustor air inlet connects preheating chamber air vent,
Heat pipe bundle includes the moderate temperature heat pipe bundle that the high-temperature hot tube bank that uniform parallel is arranged is arranged, middle warm with uniform parallel
Tube bank pass perpendicularly through preheating chamber ease up cold house's common circle anchor ring and two ends extension elongation equal, high-temperature hot tube bank with
30 °～75 ° of the horizontal plane angle of cut tiltedly wears reheat combustor and sudden strain of a muscle common side, cold house and two ends extension elongation is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126557.4A CN104792183B (en) | 2015-03-23 | 2015-03-23 | High temperature pellet waste heat recovery heat utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126557.4A CN104792183B (en) | 2015-03-23 | 2015-03-23 | High temperature pellet waste heat recovery heat utilization device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104792183A CN104792183A (en) | 2015-07-22 |
| CN104792183B true CN104792183B (en) | 2016-10-05 |
Family
ID=53557193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510126557.4A Expired - Fee Related CN104792183B (en) | 2015-03-23 | 2015-03-23 | High temperature pellet waste heat recovery heat utilization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104792183B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201581088U (en) * | 2009-12-11 | 2010-09-15 | 中冶京诚工程技术有限公司 | Slag processing system with semi-wet method |
| JP5560871B2 (en) * | 2010-04-19 | 2014-07-30 | Ｊｆｅスチール株式会社 | Thermal energy recovery method for steel slag |
| CN202304480U (en) * | 2011-08-29 | 2012-07-04 | 圣火科技(河南)有限责任公司 | High-temperature material waste heat recovery device with tower structure |
| CN103540698B (en) * | 2013-11-02 | 2015-01-07 | 许征鹏 | Steel slag granulating and afterheat recycling device |
| CN203534229U (en) * | 2013-11-05 | 2014-04-09 | 南京凯盛开能环保能源有限公司 | Power generating system for quick cooling granulating of molten slag and waste heat recovery |
| CN103882164B (en) * | 2014-03-20 | 2015-08-12 | 陕西擎华新能源技术有限公司 | A kind of molten state solids cement sensible heat recovery system and method |
| CN104388610A (en) * | 2014-11-20 | 2015-03-04 | 清华大学 | Metallurgical molten slag granulation and heat energy recovery device |
-
2015
- 2015-03-23 CN CN201510126557.4A patent/CN104792183B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104792183A (en) | 2015-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102967048B (en) | Indirect hot-air furnace using alcohol base liquid fuels | |
| CN102221201A (en) | Equal-bed pressure cold slag fluidized bed of circulating fluidized bed boiler and operation method thereof | |
| CN104457290B (en) | The exhaust heat stepped recovery heat utilization device of Zinc volatilization kiln kiln slag | |
| CN108006686A (en) | A kind of chilling waste heat boiler | |
| CN104197365B (en) | High temperature sludge exhaust heat stepped recovery warm-up combustion-supporting air device | |
| CN101139093A (en) | Method and device of fluidized carbonization moving bed activating of chemical legal wood activated charcoal | |
| CN202442318U (en) | Vacuum tube heat exchanger | |
| CN104180382A (en) | Flue gas dry method quenching system | |
| CN206378010U (en) | A kind of aluminium melting furnace afterheat utilizing system | |
| CN104792183B (en) | High temperature pellet waste heat recovery heat utilization device | |
| CN105570918A (en) | Energy-saving boiler | |
| CN106834571A (en) | A kind of blast-furnace cement sensible heat reclaims slag cooler | |
| CN206927860U (en) | Dry coal dust gasification furnace | |
| CN207674475U (en) | A kind of chilling waste heat boiler | |
| CN106765009A (en) | A kind of method of continous way heat-accumulation combustion gas heating pipe steam generator and fume afterheat synthetical recovery | |
| CN104390211B (en) | A kind of air-water combined slag cooler with breaker | |
| CN207581840U (en) | A kind of blast furnace slag eddy flow processing unit of waste heat recovery | |
| CN206069712U (en) | Active lime BASK | |
| CN108627014A (en) | A kind of new energy biomass energy smelting furnace uniformly energized | |
| CN106839748A (en) | A kind of pair of Heat Room grain heat-drying hot-blast stove | |
| CN104501609B (en) | The bootstrap system of a kind of solid thermal material and Application way thereof | |
| CN209116737U (en) | A kind of alloy tile cooling device of rotary kiln | |
| CN100397023C (en) | Method forrecovering heat quantity carried by yellow phosphorus waste slag and heat quantity produced by reaction tail gas and their comprehensive utilization | |
| CN207567264U (en) | A kind of regenerative heat-exchange stove and heat regenerator | |
| CN206018563U (en) | A kind of W flame boiler waste heat utilization system with furnace bottom hot blast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 |