CN207197278U - A kind of industrial production flue gas cool-down subtracts dirt waste-heat recovery device - Google Patents
A kind of industrial production flue gas cool-down subtracts dirt waste-heat recovery device Download PDFInfo
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- CN207197278U CN207197278U CN201720898431.3U CN201720898431U CN207197278U CN 207197278 U CN207197278 U CN 207197278U CN 201720898431 U CN201720898431 U CN 201720898431U CN 207197278 U CN207197278 U CN 207197278U
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Abstract
The utility model discloses a kind of industrial production flue gas cool-down to subtract dirt waste-heat recovery device, belongs to each production system fume treatment technical field before blast furnace ironmaking.The utility model includes air conducting mechanism, for cooling to whole device；In the inside of air conducting mechanism, and the flue gas cool-down mechanism with air conducting mechanism in cavity loop nested structure, for bulky grain flue dust because temperature reduces, density becomes big, drops in the bottom of flue gas cool-down mechanism；And the heat-exchanger rig being fixed on inside the air delivery line at the top of air conducting mechanism, the heat that air conducting mechanism exchanges heat is absorbed by heat-exchanger rig；The external ash-laden gas ingress pipe for passing air conducting mechanism of flue gas cool-down mechanism and subtract cloud of dust gas delivery line.The utility model can reach ash-laden gas cooling, the recovery of dust-laden particles fall, the purpose of heat recovery and utilization, convert cold blast sliding valve without producing fluctuation to the technique of whole system furthermore, it is possible to cut down, the product quality of production is stable.
Description
Technical field
It the utility model is related to each production system fume treatment technical field before blast furnace ironmaking, more particularly to a kind of industry
Big production flue gas cool-down subtracts dirt waste-heat recovery device.
Background technology
In modernization industry production, can all there are a large amount of flue gases to produce, 350 DEG C of maximum smoke temperature caused by industrial production~
500 DEG C, contain a large amount of dust, and CO, SO of residual simultaneously2Deng pernicious gas, air is discharged into after generally carrying out dust recovery
In.
Because ash-laden gas temperature is higher, gathered dust usually using electric dust collector, its effect is very undesirable, it is difficult to reach
To discharging standards 100mg/m3, generally all in 80~200mg/m3, larger abrasion is carried out to main air blower equipment belt.
Simultaneously in order to ensure that flue gas enters existing general dust removal, being required for design and installation to convert cold blast sliding valve reduces flue gas
Temperature, not only increase the treating capacity of gas cleaning, because blast wandering increases, the fluctuation that is also easy to cause to produce main technique and
Produced product quality is influenceed, while also increases the energy consumption of main air blower.
Bag-type dust retracting device can realize 50mg/m3Discharge below, but the characteristic requirements flue-gas temperature of cloth bag is stable
Less than 150 DEG C of holding, it is most preferable below 100 DEG C.Therefore the requirement of the cooling pretreatment of ash-laden gas, is increasingly highlighted.
Through retrieval, Chinese patent application, publication number：CN104004879B, publication date：2016.08.10, one kind is disclosed
Flue gas low-temperature section waste heat recovery apparatus of converter, including adiabatic flue, adiabatic flue one end are connected to converter gasification cooling cigarette
Road, the other end one section of evaporator of connection, one section of connection atomization cooling Venturi tube of evaporator, atomization cooling Venturi tube connection evaporator
Two sections, two sections of connection economizers of evaporator, economizer connection inertia force dust arrester；Hot water in economizer enters evaporator one
After two sections of section and evaporator, saturated steam is produced by its internal flue gas with heat；Set in atomization cooling Venturi tube
There are double medium spray guns.The invention further relates to the exhaust heat recovering method of flue gas low-temperature section waste heat recovery apparatus of converter.Flue gas with
The atomized drop that double medium spray guns inside the atomization cooling Venturi tube spray is exchanged heat, and the flue-gas temperature after heat exchange is in
In the range of 580 DEG C -600 DEG C, so as to effectively contain the localized clusters of carbon monoxide in flue gas, avoid and occur to dodge quick-fried danger
Danger so that the equipment uses safer.But the invention strengthens the profit of fume afterheat by one section of evaporator, two sections of evaporator
With, and diameter processing is carried out to flue dust with spray gun and can not be recycled, that is, water source is wasted, generates new pollution sources again.
Utility model content
1. utility model technical problems to be solved
For in the processing procedure of ash-laden gas in the prior art, efficiency of dust collection is low, cooling-down effect unobvious, installation convert it is cold
Air-valve easily causes the problem of whole production technology fluctuation, and the utility model provides a kind of industrial production flue gas cool-down and subtracted more than dirt
Heat reclamation device.It is relatively isolated to flue gas cool-down by cooling mechanism and air mechanism of conducting a sightseeing tour, and by natural gravity dedusting,
The purpose of the whole stable processing technique of guarantee is reached.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the utility model is：
A kind of industrial production flue gas cool-down subtracts dirt waste-heat recovery device, including：Air conducting mechanism, for whole device
Cooled；In the inside of the air conducting mechanism, and the flue gas cool-down with air conducting mechanism in cavity loop nested structure
Mechanism, for bulky grain flue dust because temperature reduces, density becomes big, drops in the bottom of flue gas cool-down mechanism, reaches the first step and subtract dirt
Effect；And the heat-exchanger rig being fixed on inside the air delivery line at the top of the air conducting mechanism, by air conducting machine
The heat of structure heat exchange is absorbed by heat-exchanger rig, reaches the effect of heat recovery and utilization；The flue gas cool-down mechanism is external to be passed
The ash-laden gas ingress pipe of air conducting mechanism and subtract cloud of dust gas delivery line.
Further technical scheme, flue gas cool-down mechanism avoid outer gas stream to flue gas whole in the barrel-like structure of closing
Fluctuation is produced in individual technique, the ash-laden gas ingress pipe penetrates at the top of barrel-like structure, and is inserted into the bottom of barrel-like structure
Portion, increase in flue gas in the in-house flow distance of whole flue gas cool-down, allow bulky grain flue dust to have time enough cooling simultaneously
Fall；The upper side for subtracting cloud of dust gas delivery line and being fixed on barrel-like structure, subtracts the flue gas after dirt and is exported by the pipeline；Bucket
The bottom of shape structure is in closing in shape, and depositing dust dust leg communicates, after being easy to the centralized collection of bulky grain flue dust and concentrating ash discharge
Secondary use.
Further technical scheme, part inside ash-laden gas ingress pipe insertion barrel-like structure are the loudspeaker opened under gradually
Shape opening, makes the air velocity of flue gas gradually reduce, and avoids acutely reducing and causing technological fluctuation excessive, and gradually slow down dust-laden
The flowing velocity of flue gas, extend flue gas in the in-house flowing time of whole flue gas cool-down, further allow bulky grain flue dust to have foot
The enough time cools and fallen.
Further technical scheme, air conducting mechanism are in the drum structure that top is gradually closed up, the heat being easy to after heat exchange
Air carries out secondary heat exchange utilization after concentrating outflow；Diameter is more than the flue gas cool-down mechanism, the shape around flue gas cool-down mechanism
Into ring cavity；In the ring cavity of the cavity loop nested structure, stationary distribution has air conducting reinforcing mechanisms, improves air velocity,
And heat exchange efficiency is improved, ring cavity bottom is annular air intake.
Further technical scheme, air conducting reinforcing mechanisms are the deflector that homogeneous vertical formula is fixed, and both improve sky
The convection velocity that gas rises, the purpose of direct heat conduction can be played again, the in-house heat conduction export of flue gas cool-down improves
The in-house cooling rate of flue gas cool-down.
Further technical scheme, deflector are distributed as the radian setting every 20~40 °, when being distributed overstocked, influence wind
Measure and enter, heat exchange when being distributed thin, influences wind speed using less.The angle of flare openings is 70~80 °, and opening is excessive, to whole
The fluctuation of individual technique is larger, during too small openings, does not have the effect for reducing wind speed.
Further technical scheme, the top of flue gas cool-down mechanism, it is provided with the drop for being fixed on air conducting mechanism side wall
Warm mechanism, to the barrel-like structure forced cooling of whole flue gas cool-down mechanism, when air conducting mechanism cooling-down effect unobvious, rise
To the effect of supplement forced cooling.
Further technical scheme, cooling mechanism are equally distributed atomizer, lowering temperature uniform；The heat-exchanger rig is
Board-like or pipe heat exchanger, heat exchange efficiency are high.
Further technical scheme, air-introduced machine is fixed at air delivery tube outlet, plays a part of forced convertion, Ke Yiti
High heat exchange efficiency, and external residual heat using device, secondary use is carried out to waste heat；The depositing dust dust leg exit sets and puts ash
Valve, when stopping air inlet, concentrate bulky grain soot emissions.
A kind of industrial production flue gas cool-down subtracts the recovery method of dirt waste-heat recovery device, and step is：
Step 1: ash-laden gas imports：Ash-laden gas is led by ash-laden gas ingress pipe caused by ash-laden gas generating mechanism
It is in-house to enter flue gas cool-down；
Step 2: gravity subtracts dirt：Bulky grain flue dust drops down onto flue gas cool-down actuator base under its own Action of Gravity Field；
Step 3: flue gas cool-down：Subtract the flue gas after dirt during the in-house rising of flue gas cool-down, in air conducting
In the presence of mechanism, two mechanisms heat exchange, the bulk temperature of whole flue gas cool-down mechanism declines, and the temperature for subtracting the flue gas after dirt is corresponding
Reduce；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to secondary by subtracting cloud of dust gas delivery line
After dedusting mechanism, the gas discharge of cleaning, thin dirt recycles；
Step 5: waste heat recovery：Caused heat leads to during the export of air delivery line after the heat exchange of air conducting mechanism
Heat-exchanger rig absorption is crossed, and passes through residual heat using device secondary use again.
Whole technical process cooling subtracts dirt, UTILIZATION OF VESIDUAL HEAT IN, fume recovery while carried out, moreover, avoiding to whole technique
Process variation influences, and the product quality for improving production process is stable.
3. beneficial effect
Using technical scheme provided by the utility model, compared with prior art, have the advantages that：
(1) a kind of industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, passes through air conducting mechanism
Whole device is cooled, bulky grain flue dust is because temperature reduces, and density becomes big, so as to drop at the bottom of flue gas cool-down mechanism
Portion, reaches the effect that the first step subtracts dirt, and the heat that air conducting mechanism exchanges heat is absorbed, reached by heat-exchanger rig by heat-exchanger rig
The effect of heat recovery and utilization, three mechanism synergies, reach ash-laden gas cooling whereabouts recovery, the mesh of heat recovery and utilization
, cold blast sliding valve is converted furthermore, it is possible to cut down, fluctuation will not be produced to the technique of whole system, the product quality of production is stable；
(2) a kind of industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, the barrel-like structure of closing, keeps away
Outer gas stream is exempted from and has produced fluctuation in whole technique to flue gas, system pressure difference resistance damage is small, only 50-200Pa, does not influence main work
Process system, it is not necessary to increase other devices, guarantee is provided for flue gas qualified discharge；The flowing of flue gas is V-shaped, increases in cigarette
Gas allows bulky grain flue dust to have time enough to cool and fall in the in-house flow distance of whole flue gas cool-down；Closing in shape bucket
Bottom, and depositing dust dust leg communicate, and are easy to the centralized collection of bulky grain flue dust and concentrate the secondary use after ash discharge；
(3) a kind of industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, under the flare openings opened
Make the air velocity of flue gas gradually reduce, avoid acutely reducing and causing technological fluctuation excessive, and gradually slow down ash-laden gas
Flowing velocity, extend flue gas in the in-house flowing time of whole flue gas cool-down, when further allowing bulky grain flue dust to have enough
Between cool and fall；And the flue-gas temperature of stable and uniform is fully buffered, lifting produces main technology stability, can reduced to greatest extent
Prevent to convert cold wind, reduce main air blower load, lift production capacity；
(4) a kind of industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, the circle that top is gradually closed up
Tubbiness air conducting mechanism, it is easy to the hot-air after heat exchange to carry out secondary heat exchange utilization after concentrating outflow, and can circulates and be used for
Other systems, realize energy-saving and emission-reduction；Normal heat exchange is carried out by convection current, it is not necessary to increases the equipment such as blower fan and power disappears
Consumption；
(5) a kind of industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, what homogeneous vertical formula was fixed
Deflector, the convection velocity of air rising was both improved, the purpose of direct heat conduction can be played again, flue gas cool-down is in-house
Heat conduction export, improves the in-house cooling rate of flue gas cool-down；
(6) a kind of industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, it is determined that accurate water conservancy diversion
The radian of plate distribution is set and the angle of flare openings is set, and the small only 50-200Pa of apparatus system pressure difference resistance damage, is not influenceed
Main process system, it is not necessary to increase other devices, guarantee is provided for flue gas qualified discharge；Reduce to bag-type dust in final dusting
Device cloth bag temperature requirement, ensure that the safe operation and cloth bag requirement of sack cleaner, while reduce discharge flue-gas temperature, energy
Enough bulky grains by more than 1mm handle more than 90%, and preventing the big bulky grain of amount of stored heat influences follow-up final dusting, such as,
If do not handled, bulky grain flue dust can be by cloth bag (being usually chemical fibre material) scaling loss in bag-type dust；
(7) industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, the drop of air conducting mechanism side wall
The setting of warm mechanism, it is therefore an objective to when temperature is too high in whole device has little time cooling, play a part of supplementing forced cooling, with
Reach perfectly safe；
(8) industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, and flue gas cool-down mechanism diameter is cigarette
More than 3 times of feed channel, it is therefore an objective to which, when production technology fluctuation causes stress fluctuation, flue gas cool-down mechanism plays " accumulator " work
With, the steady of whole production system overall process, buffering and stability are realized, is more matched with reaching the parameter of whole system,
More efficient, regulation is easier；
(9) industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, equally distributed atomizer, drop
Warm uniform, moreover, easily producing vapor, cooling effect is more obvious, efficiency high；
(10) industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device, and air-introduced machine plays to be forced to air
Strengthen the effect of convection current, further to improve heat exchange efficiency；External residual heat using device can carry out secondary use to waste heat.
Brief description of the drawings
Fig. 1 is that industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device structural representation；
Fig. 2 is the A-A faces profile in Fig. 1；
Fig. 3 is the B-B faces profile in Fig. 2；
Fig. 4 is the recovery method flow chart that industrial production flue gas cool-down of the present utility model subtracts dirt waste-heat recovery device.
In figure：1st, air delivery line；2nd, ash-laden gas ingress pipe；3rd, flue gas cool-down mechanism；5th, air conducting mechanism；6th, drop
Dirt dust leg；7th, air conducting reinforcing mechanisms；8th, cloud of dust gas delivery line is subtracted；9th, cooling mechanism；10th, air intake；11st, heat exchange dress
Put；21st, flare openings；61st, ash-removing valve；100th, ash-laden gas generating mechanism；200th, final dusting mechanism.
Embodiment
To further appreciate that content of the present utility model, the utility model is described in detail with reference to accompanying drawing.
Embodiment 1
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, including：Air conducting mechanism 5, Ke Yicheng
Vertical or horizontal barrel-like structure, the present embodiment use vertical barrel-like structure, a diameter of 3400mm, are highly 4600mm, are used for
Whole device is cooled；It is in the sleeved knot of cavity in the inside of the air conducting mechanism 5, and with air conducting mechanism 5
The flue gas cool-down mechanism 3 of structure, a diameter of 3000mm, it is highly 4000mm also in vertical tubbiness, bulky grain flue dust is dropped due to temperature
Low, density becomes big, drops in the bottom of flue gas cool-down mechanism 3, reaches the effect that the first step subtracts dirt；And it is fixed on the air
Heat-exchanger rig 11 inside the air delivery line 1 at the top of deflector 5, can be board-like or pipe heat exchanger, by air conducting
The heat that mechanism 5 exchanges heat is absorbed by heat-exchanger rig 11, reaches the effect of heat recovery and utilization；Outside the flue gas cool-down mechanism 3
Connect the ash-laden gas ingress pipe 2 for passing air conducting mechanism 5 and subtract cloud of dust gas delivery line 8, diameter is 1000mm, by dust constaining
After conductance enters processing, then the flue gas export that dirt cooling will be subtracted.
Embodiment 2
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 1
Enter part to be：As shown in Figure 1,3, flue gas cool-down mechanism 3 avoids outer gas stream to flue gas whole in the barrel-like structure of closing
Fluctuation is produced in technique, the ash-laden gas ingress pipe 2 penetrates at the top of barrel-like structure, and is inserted into the bottom of barrel-like structure
Portion, the flow distance in whole flue gas cool-down mechanism 3 in flue gas is increased, allow bulky grain flue dust to have time enough cooling simultaneously
Fall；The upper side for subtracting cloud of dust gas delivery line 8 and being fixed on barrel-like structure, subtracts the flue gas after dirt and is exported by the pipeline；
The bottom of barrel-like structure is in closing in shape, and depositing dust dust leg 6 communicates, after being easy to the centralized collection of bulky grain flue dust and concentrating ash discharge
Secondary use.
Embodiment 3
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 2
Enter part to be：Ash-laden gas ingress pipe 2 inserts the part inside barrel-like structure as the flare openings 21 opened under gradually, makes cigarette
The air velocity of gas gradually reduces, and avoids acutely reducing and causing technological fluctuation excessive, and gradually slow down the flowing of ash-laden gas
Speed, extend flowing time of the flue gas in whole flue gas cool-down mechanism 3, further allow bulky grain flue dust to have time enough drop
Temperature simultaneously falls.Air conducting mechanism 5 is in the drum structure that top is gradually closed up, and is easy to the hot-air after heat exchange to concentrate outflow laggard
Row secondary heat exchange utilizes；Diameter is more than the flue gas cool-down mechanism 3, and ring cavity is formed around flue gas cool-down mechanism 3；In the sky
In the ring cavity of the sleeved structure of chamber, stationary distribution has air conducting reinforcing mechanisms 7, improves air velocity, and improves heat exchange efficiency,
Ring cavity bottom is annular air intake 10.
Embodiment 4
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and air conducting reinforcing mechanisms 7 are uniformly perpendicular
The deflector of straight fixation, the convection velocity of air rising was both improved, the purpose of direct heat conduction can be played again, flue gas is dropped
Heat conduction export in warm mechanism 3, improves the cooling rate inside flue gas cool-down mechanism 3.The top of flue gas cool-down mechanism 3,
The cooling mechanism 9 for being fixed on the side wall of air conducting mechanism 5 is provided with, drop is forced to the barrel-like structure of whole flue gas cool-down mechanism 3
Temperature, when 5 cooling-down effect unobvious of air conducting mechanism, play a part of supplementing forced cooling.Cooling mechanism 9 can be uniform
The atomizer of distribution, lowering temperature uniform；The heat-exchanger rig 11 is board-like or pipe heat exchanger, and heat exchange efficiency is high.
Embodiment 5
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 4
Enter part to be：Air-introduced machine is fixed in the exit of air delivery line 1, is played a part of forced convertion, can be improved heat exchange efficiency, and
External residual heat using device, secondary use is carried out to waste heat；The exit of depositing dust dust leg 6 sets ash-removing valve 61, stop into
During gas, concentrate bulky grain soot emissions.
Embodiment 6
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 4
Enter part to be：Deflector is distributed as setting every 20 ° of radian, 18 altogether.The angle of flare openings 21 is 80 °；It is empty
Gas deflector 5 and the diameter of flue gas cool-down mechanism 3 ratio are 1.1：1；Flue gas cool-down mechanism 3, ash-laden gas ingress pipe 2 and subtract dirt
The diameter ratio of flue gas delivery line 8 is：(3~5)：1：1, be respectively in the present embodiment：5500mm, 5000mm, 1000mm and
1000mm。
The industrial production flue gas cool-down of the present embodiment subtracts the recovery method of dirt waste-heat recovery device, as shown in figure 4, step
For：
Step 1: ash-laden gas imports：Ash-laden gas generating mechanism 100, such as blast furnace, caused ash-laden gas temperature are
400 DEG C or so, and bulky grain flue dust is rich in, for example diameter is more than 1mm, and flue gas cool-down mechanism 3 is imported by ash-laden gas ingress pipe 2
It is internal；
Step 2: gravity subtracts dirt：Bulky grain flue dust drops down onto the bottom of flue gas cool-down mechanism 3 under its own Action of Gravity Field；
Step 3: flue gas cool-down：Subtract the flue gas after dirt during rising inside flue gas cool-down mechanism 3, led in air
In the presence of flowing mechanism 5, two mechanisms heat exchange, the bulk temperature of whole flue gas cool-down mechanism 3 declines, and subtracts the temperature of the flue gas after dirt
It is corresponding to reduce；Halfway bulky grain fall because temperature reduces, under the principle expanded with heat and contract with cold, density increase, works as self gravitation
Gradually when increasing to the buoyancy more than air-flow, the bottom for falling to flue gas cool-down mechanism 3 that will continue, i.e.,：Ash-laden gas exists
Inside flue gas cool-down mechanism 3, either decline in still uphill process, because air conducting mechanism 5 is to flue gas cool-down mechanism 3
Cooling effect, can all there is bulky grain flue dust is lasting to drop, if flue gas cool-down mechanism 3 is sufficiently high, in theory, all bulky grains
Flue dust can all drop；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to secondary by subtracting cloud of dust gas delivery line 8
After dedusting mechanism 200, final dusting can use bag-type dust, cyclone dust removal, inertial dust collection etc., it might even be possible to continuously discharge some
The industrial production flue gas cool-down of individual the present embodiment subtracts dirt waste-heat recovery device, until the gas discharge of cleaning, thin dirt recycle；
Step 5: waste heat recovery：Air conducting mechanism 5 exchange heat after caused heat air delivery line 1 export during,
Absorbed by heat-exchanger rig 11, such as tubular type or plate type heat exchanger, and again by residual heat using device, such as evaporator, it is secondary
Utilize.
After testing, flue gas after treatment, subtract cloud of dust gas delivery line 8 export after, temperature be less than 180 DEG C, and by 1mm with
On bulky grain reduce to less than 10%, destructive effect will not be produced to final dusting device.
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and the diameter of flue gas cool-down mechanism 3 is flue gas
5 times of pipeline, it is therefore an objective to when production technology fluctuation causes stress fluctuation, by the release of the heat balance in flue to more than ten
In the space of the flue gas cool-down mechanism 3 of even twenties times of opposing seal, flue gas cool-down mechanism 3 plays " accumulator " effect,
The steady of whole production system overall process, buffering and stability are realized, is more matched with reaching the parameter of whole system, efficiency
Higher, regulation is easier.
Embodiment 7
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 6
Enter part to be：As shown in Fig. 2 deflector is distributed as setting every 30 ° of radian, 12 altogether.The angle of flare openings 21
Spend for 70 °.
After testing, flue gas after treatment, subtract cloud of dust gas delivery line 8 export after, temperature be less than 150 DEG C, and by 1mm with
On bulky grain reduce to less than 5%, destructive effect will not be produced to final dusting device.
Embodiment 8
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 6
Enter part to be：Deflector is distributed as setting every 40 ° of radian, 9 altogether.The angle of flare openings 21 is 75 °.
After testing, flue gas after treatment, subtract cloud of dust gas delivery line 8 export after, temperature be less than 120 DEG C, and by 1mm with
On bulky grain reduce to less than 3%.
Embodiment 9
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is the same as embodiment 5, deflector point
Cloth is sets every 30 ° of radian, 12 altogether.The angle of flare openings 21 is 70 °.The industrial production flue gas of the present embodiment
Cooling subtracts the recovery method of dirt waste-heat recovery device, and step is：
Step 1: ash-laden gas imports：Ash-laden gas generating mechanism 100, such as blast furnace, caused ash-laden gas temperature are
More than 500 DEG C, and bulky grain flue dust is rich in, for example diameter is more than 1mm, and flue gas cool-down mechanism 3 is imported by ash-laden gas ingress pipe 2
It is internal；
Step 2: gravity subtracts dirt：Bulky grain flue dust drops down onto the bottom of flue gas cool-down mechanism 3 under its own Action of Gravity Field；
Step 3: flue gas cool-down：Subtract the flue gas after dirt during rising inside flue gas cool-down mechanism 3, led in air
In the presence of flowing mechanism 5, two mechanisms heat exchange, the bulk temperature of whole flue gas cool-down mechanism 3 declines, and subtracts the temperature of the flue gas after dirt
It is corresponding to reduce；Because entrance flue gas temperature early stage is too high, starts atomizer and pressure drop is carried out to the staving of flue gas cool-down mechanism 3
Temperature；Restart air-introduced machine, the convection current to the air in ring cavity is strengthened；So, to temperature inside the staving of flue gas cool-down mechanism 3
The cooling-down effect of degree increases exponentially, and plays a part of collaboration；Halfway bulky grain fall because temperature reduces, expands with heat and contract with cold
Principle under, density increase, when self gravitation gradually increases to the buoyancy more than air-flow, will continue fall to flue gas drop
The bottom of warm mechanism 3, i.e.,：Ash-laden gas either declines in still uphill process, due to sky inside flue gas cool-down mechanism 3
Cooling effect of the gas deflector 5 to flue gas cool-down mechanism 3, can all there is bulky grain flue dust is lasting to drop, if flue gas cool-down
Mechanism 3 is sufficiently high, and in theory, all bulky grain flue dust can all drop；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to secondary by subtracting cloud of dust gas delivery line 8
After dedusting mechanism 200, final dusting can use bag-type dust, cyclone dust removal, inertial dust collection etc., it might even be possible to continuously discharge some
The industrial production flue gas cool-down of individual the present embodiment subtracts dirt waste-heat recovery device, until the gas discharge of cleaning, thin dirt recycle；
Step 5: waste heat recovery：Air conducting mechanism 5 exchange heat after caused heat air delivery line 1 export during,
Absorbed by heat-exchanger rig 11, such as tubular type or plate type heat exchanger, and again by residual heat using device, such as evaporator, it is secondary
Utilize.
After testing, although early stage flue dust temperature it is too high, after treatment, subtract after cloud of dust gas delivery line 8 exports, temperature
Reduce to less than 10%, final dusting device will not also be produced destructive less than 150 DEG C, and by more than 1mm bulky grain
Effect.It is additionally, since air conducting mechanism 5 and flue gas cool-down mechanism 3 is relatively isolated, strengthens convection current and forced cooling all without right
The inside smoke of flue gas cool-down mechanism 3 produces excessive fluctuation, would not also influence the fluctuation of whole technical process.
Embodiment 10
The industrial production flue gas cool-down of the present embodiment subtracts dirt waste-heat recovery device, and basic structure is different and change with embodiment 9
Enter part to be：Because vapor is excessive caused by atomizer, heat-exchanger rig 11 can be influenceed and secondary waste heat utilizes device
Service life, therefore, for the ash-laden gas no more than 500 DEG C, atomizer can not be started, it is necessary to when, it is only necessary to start
Air-introduced machine is that can reach the effect that cooling subtracts dirt.
Schematically the utility model and embodiments thereof are described above, this describes no restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So if this area
Those of ordinary skill enlightened by it, without departing from the spirit of the invention, without creativeness designing with should
The similar frame mode of technical scheme and embodiment, all should belong to the scope of protection of the utility model.
Claims (9)
1. a kind of industrial production flue gas cool-down subtracts dirt waste-heat recovery device, it is characterised in that including：
Air conducting mechanism (5)；
In the inside of the air conducting mechanism (5), and the flue gas cool-down with air conducting mechanism (5) in cavity loop nested structure
Mechanism (3)；And
The heat-exchanger rig (11) for air delivery line (1) inside being fixed at the top of the air conducting mechanism (5)；
The external ash-laden gas ingress pipe (2) for passing air conducting mechanism (5) of the flue gas cool-down mechanism (3) and subtract cloud of dust conductance
Outlet pipe (8).
2. industrial production flue gas cool-down according to claim 1 subtracts dirt waste-heat recovery device, it is characterised in that：The flue gas
In the barrel-like structure of closing, the ash-laden gas ingress pipe (2) penetrates cooling mechanism (3) at the top of barrel-like structure, and inserts
To the bottom of barrel-like structure；The upper side for subtracting cloud of dust gas delivery line (8) and being fixed on barrel-like structure；The barrel-like structure
Bottom is in closing in shape, and depositing dust dust leg (6) communicates.
3. industrial production flue gas cool-down according to claim 2 subtracts dirt waste-heat recovery device, it is characterised in that：The dust-laden
Part inside flue gas ingress pipe (2) insertion barrel-like structure is the flare openings (21) opened under gradually.
4. industrial production flue gas cool-down according to claim 3 subtracts dirt waste-heat recovery device, it is characterised in that：The air
Deflector (5) is in the drum structure that top is gradually closed up, and diameter is more than the flue gas cool-down mechanism (3)；In the cavity loop
In the ring cavity of nested structure, stationary distribution has air conducting reinforcing mechanisms (7), and ring cavity bottom is air intake (10).
5. industrial production flue gas cool-down according to claim 4 subtracts dirt waste-heat recovery device, it is characterised in that：The air
Water conservancy diversion reinforcing mechanisms (7) are the deflector that homogeneous vertical formula is fixed.
6. industrial production flue gas cool-down according to claim 5 subtracts dirt waste-heat recovery device, it is characterised in that：The water conservancy diversion
Plate is distributed as the radian setting every 20~40 °；The angle of the flare openings (21) is 70~80 °.
7. industrial production flue gas cool-down according to claim 5 subtracts dirt waste-heat recovery device, it is characterised in that：The flue gas
The top of cooling mechanism (3), it is provided with the cooling mechanism (9) for being fixed on air conducting mechanism (5) side wall.
8. industrial production flue gas cool-down according to claim 7 subtracts dirt waste-heat recovery device, it is characterised in that：The cooling
Mechanism (9) is equally distributed atomizer；The heat-exchanger rig (11) is board-like or pipe heat exchanger.
9. industrial production flue gas cool-down according to claim 7 subtracts dirt waste-heat recovery device, it is characterised in that：The air
Air-introduced machine, and external residual heat using device are fixed in delivery line (1) exit；Depositing dust dust leg (6) exit sets and puts ash
Valve (61).
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| CN107270729A (en) * | 2017-07-24 | 2017-10-20 | 马鞍山钢铁股份有限公司 | A kind of industrial production flue gas cool-down subtracts dirt waste-heat recovery device and recovery method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107270729A (en) * | 2017-07-24 | 2017-10-20 | 马鞍山钢铁股份有限公司 | A kind of industrial production flue gas cool-down subtracts dirt waste-heat recovery device and recovery method |
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