CN207187318U - A kind of metallurgical raw material dries exhaust gas dust recovery system - Google Patents
A kind of metallurgical raw material dries exhaust gas dust recovery system Download PDFInfo
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- CN207187318U CN207187318U CN201720898100.XU CN201720898100U CN207187318U CN 207187318 U CN207187318 U CN 207187318U CN 201720898100 U CN201720898100 U CN 201720898100U CN 207187318 U CN207187318 U CN 207187318U
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Abstract
The utility model discloses a kind of metallurgical raw material to dry exhaust gas dust recovery system, belongs to miberal powder drying and processing technical field.The utility model includes 2 flue gas cool-down device for reducing dust by subtracting cloud of dust gas delivery line serial communication, respectively one-level flue gas cool-down device for reducing dust and secondary smoke cooling device for reducing dust；The dust arrester installation that cloud of dust gas delivery line connects is subtracted by two level with the secondary smoke device for reducing dust that cools, is used after micronic dust is reclaimed；Each flue gas cool-down device for reducing dust includes：Air conducting mechanism；In the inside of air conducting mechanism, and the flue gas cool-down mechanism with air conducting mechanism in cavity loop nested structure；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 or two level subtracts cloud of dust gas delivery line.The utility model is relatively isolated to flue gas cool-down by two-stage forced cooling mechanism and air guide mechanism, and stops dedusting by natural gravity and inertia, has reached the purpose of recovery metal mining powder process stabilizing.
Description
Technical field
Miberal powder drying and processing technical field is the utility model is related to, more particularly to a kind of metallurgical raw material drying exhaust gas dust returns
Receipts system.
Background technology
Modernize in metallurgical recovery process, in order to ensure that the stabilization of material quality, lump ore, pelletizing production fine ore etc. all needs
Drying and processing is carried out, dries caused 100 DEG C~150 DEG C of flue-gas temperature of discharge, main dust is metal mining powder particle, generally
It is directly discharged in air, has both produced pollution and also resulted in unnecessary waste.
Therefore the element such as Zn, K, Na in recovered flue gas is needed in production process, because the particularity of the elements such as Zn, K, Na is made
Complicated into recovery process, device configuration is perfect not to the utmost, operating rate is not high, and big to the main technogenic influence of production process.
Moreover, in order to realize energy-saving and emission-reduction, it is necessary to carry out depositing dust to flue gas, cooling is handled；Because mineral powder granular facilitates back
Receive, more than 80% can be reclaimed substantially using dust removal with machine mode, discharged after entering back into water film dedusting (or bag-type dust) recovery,
Certain heat circulation is reclaimed simultaneously to use.
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 caused to main air blower impeller and housing.
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 increases, the fluctuation that is also easy to cause to produce main technique and influence
The product quality produced, while also increase 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 ash-laden gas in metallurgical raw material drying course in the prior art processing efficiency of dust collection is low, cooling-down effect is failed to understand
Aobvious, installation is converted the problem of cold blast sliding valve easily causes whole recovery process fluctuation, and the utility model provides a kind of metallurgical raw material and dried
Dry flue gas fume recovery system.It is relatively isolated to flue gas cool-down by two-stage forced cooling mechanism and air guide mechanism, and
By natural gravity and with inertial dust collection, recovery metal mining powder is reached and has ensured the stable purpose of whole recovery process.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the utility model is：
A kind of metallurgical raw material dries exhaust gas dust recovery system, including：By 2 that subtract cloud of dust gas delivery line serial communication
Flue gas cool-down device for reducing dust, respectively one-level flue gas cool-down device for reducing dust and secondary smoke cooling device for reducing dust；With secondary smoke
Cooling device for reducing dust subtracts the dust arrester installation of cloud of dust gas delivery line connection by two level, is used after micronic dust is reclaimed；Wherein：Often
Individual flue gas cool-down device for reducing dust includes：Air conducting mechanism, for cooling to whole device；In the air conducting machine
The inside of structure, and the flue gas cool-down mechanism with air conducting mechanism in cavity loop nested structure, bulky grain flue dust are dropped due to temperature
Low, density becomes big, drops in the bottom of flue gas cool-down mechanism, reaches the effect that the first step subtracts dirt；Outside the flue gas cool-down mechanism
Connect the ash-laden gas ingress pipe for passing air conducting mechanism and subtract cloud of dust gas delivery line or two level subtracts 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
Produce fluctuation in individual technique, it is described to subtract cloud of dust gas delivery line and two level subtracts the gas outlet of cloud of dust gas delivery line and is both secured to tubbiness knot
The upper side of structure, subtract the flue gas after dirt and exported by the pipeline；The bottom of flue gas cool-down mechanism barrel-like structure is in closing in
Shape, 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；The one-level cigarette
The ash-laden gas ingress pipe of gas cooling device for reducing dust with being communicated at the top of flue gas cool-down mechanism barrel-like structure, consolidate by barrel-like structure inwall
Surely there is downwardly extending dust board, allow bulky grain flue dust because inertia and gravity are hit on dust board, and have time enough cooling simultaneously
Fall；Flue gas cool-down mechanism barrel-like structure of the air inlet for subtracting cloud of dust gas delivery line from secondary smoke cooling device for reducing dust
Top penetrates, and is inserted into the bottom of barrel-like structure, increases in flue gas in the in-house flow distance of whole flue gas cool-down, allows
Bulky grain flue dust has time enough to cool and fall.
Further technical scheme, heat exchange dress is fixedly installed inside the headspace delivery line of the air conducting mechanism
Put, the heat that air conducting mechanism exchanges heat is absorbed by heat-exchanger rig, reach the effect of heat recovery and utilization；The dust board
The top of flue gas cool-down mechanism is fixed in the top fixing end away from the swash plate shape for subtracting cloud of dust gas delivery line, first swash plate,
And by the import of ash-laden gas ingress pipe and subtract the outlet of cloud of dust gas delivery line and separate, dust board stops the bulky grain of flowing
Afterwards, dropped due to the effect of inertia, and the air velocity of flue gas is gradually reduced, extend flue gas in whole flue gas cool-down mechanism
Interior flowing time, bulky grain flue dust is further allowed to have time enough to cool and fall；It is described to subtract the insertion of cloud of dust gas delivery line
Part inside barrel-like structure is the flare openings opened under gradually, makes the air velocity of flue gas gradually reduce, avoids acutely dropping
It is low and cause technological fluctuation excessive, and gradually slow down the flowing velocity of ash-laden gas, extend flue gas in whole flue gas cool-down mechanism
Interior flowing time, bulky grain flue dust is further allowed to have time enough to cool and fall.
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, and 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 air intake.
Further technical scheme, air conducting reinforcing mechanisms are the diaphragm that homogeneous vertical formula is fixed, and are both improved
The convection velocity that air rises, the purpose of direct heat conduction can be played again, the in-house heat conduction export of flue gas cool-down carries
The in-house cooling rate of high flue gas cool-down.
Further technical scheme, diaphragm are distributed as the radian setting every 20~40 °, when being distributed overstocked, influenceed
Air quantity enters, and heat exchange when being distributed thin, influences wind speed using less；The angle of the flare openings and dust board is 70~
80°.The angle of dust board is excessive, does not have an effect of inertial impaction, and during angle too small, particle easily in plate face does not allow by accumulation
Easily drop；The opening of flare openings is excessive, and the fluctuation to whole technique is larger, and during too small openings, not having reduces wind speed
Effect.
Further technical scheme, the top of flue gas cool-down mechanism, it is provided with and is fixed on the strong of air conducting mechanism side wall
Cooling mechanism processed, to the barrel-like structure forced cooling of whole flue gas cool-down mechanism, when air conducting mechanism cooling-down effect unobvious
When, play a part of supplementing forced cooling.
Further technical scheme, forced cooling mechanism are equally distributed atomizer, lowering temperature uniform, and cooling face is big；
The heat-exchanger rig is board-like or pipe heat exchanger, and heat exchange efficiency is 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 recovery process of metallurgical raw material drying exhaust gas dust recovery system, step are：
Step 1: ash-laden gas imports：Ash-laden gas is imported by ash-laden gas ingress pipe caused by metallurgical raw material drying oven
Flue gas cool-down in one-level flue gas cool-down device for reducing dust is in-house；
Step 2: gravity inertial subtracts dirt：Bulky grain flue dust drops down onto dust board table under its own gravity, inertial flow effect
Face, and fall to flue gas cool-down actuator base along dust board；
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；The bulky grain flue dust not dropped is by cold events, density increase, then in the presence of dust board stop, persistently falls to cigarette
Gas cooling mechanism bottom；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to two level by subtracting cloud of dust gas delivery line
Flue gas cool-down device for reducing dust；
Step 5: two level gravity subtracts dirt：Under flare openings effect, airflow velocity reduces, the bulky grain flue dust of residual
The flue gas cool-down actuator base of secondary smoke cooling device for reducing dust is dropped down onto under its own Action of Gravity Field；
Step 6: secondary smoke cools：Subtract flue gas cool-down mechanism of the flue gas after dirt in secondary smoke cooling device for reducing dust
During inside rises, in the presence of air conducting mechanism, the heat exchange of two mechanisms, the bulk temperature of whole flue gas cool-down mechanism
Decline, subtract the temperature accordingly secondary reduction of the flue gas after dirt；
Step 7: two level subtracts dirt cooling flue gas export：Subtract the flue gas after dirt cooling to subtract cloud of dust gas delivery line by two level and lead
Go out to dust arrester installation is passed through, reclaim metallic dust；
Step 8: waste heat recovery：Caused heat is derived in air delivery line after each air conducting mechanism is exchanged heat
Cheng Zhong, absorbed by heat-exchanger rig, and pass through residual heat using device secondary use again.
Whole technical process cooling subtracts dirt, UTILIZATION OF VESIDUAL HEAT IN, metallic dust recovery while carried out, moreover, being converted without increase cold
Air-valve, avoid blast change influences on whole stoving process process variation, and the product quality of drying 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 metallurgical raw material drying exhaust gas dust recovery system of the present utility model, each flue gas cool-down device for reducing dust
Ash-laden gas can be handled, flue gas cool-down device for reducing dust is cooled by air conducting mechanism to whole device,
For bulky grain flue dust because temperature reduces, density becomes big, so as to drop in the bottom of flue gas cool-down mechanism, reaches the first step and subtracts dirt
Effect, heat-exchanger rig absorb the heat that air conducting mechanism exchanges heat by heat-exchanger rig, reach the effect of heat recovery and utilization,
Three mechanism synergies, reach ash-laden gas cooling whereabouts recovery, the purpose of heat recovery comprehensive utilization, moreover, whole system
System converts cold blast sliding valve without increase, and fluctuation will not be produced to the technique of whole system, and the product quality of drying is stable；
(2) a kind of metallurgical raw material drying exhaust gas dust recovery system of the present utility model, the barrel-like structure of closing, is avoided
Outer gas stream produces fluctuation to flue gas in whole technique, and system pressure difference resistance damages small, only 50-200Pa, do not influence main technique system
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 and exists in flue gas
The in-house flow distance of whole flue gas cool-down, allows bulky grain flue dust to have time enough to cool and fall；Closing in shape bucket bottom, and
Depositing dust dust leg communicates, and is easy to the centralized collection of bulky grain flue dust and concentrates the secondary use after ash discharge, what whole device was collected
Dust Capacity is big, convenient production flexible organization can be cleared up with the cycle, and it is convenient and swift to overhaul cleaning；, can after reducing flue-gas temperature
Reach dreamboat and enter bag-type dust or water film dedusting retracting device, realize that bag-type dust substitutes electric precipitation production；
(3) a kind of metallurgical raw material drying exhaust gas dust recovery system of the present utility model, dust board is by the bulky grain of flowing
After stop, dropped due to the effect of inertia, and the air velocity of flue gas is gradually reduced, extend flue gas in whole flue gas cool-down
In-house flowing time；Dust board can be arranged in parallel with multiple, further allow bulky grain flue dust to have time enough cooling
And fall；Under the flare openings opened the air velocity of flue gas is gradually reduced, avoid acutely reducing and causing technological fluctuation mistake
Greatly, and gradually slow down the flowing velocity of ash-laden gas, extend flue gas in the in-house flowing time of whole flue gas cool-down, further
Bulky grain flue dust is allowed to have time enough to cool and fall；And the flue-gas temperature of stable and uniform is fully buffered, lifting produces main work
Skill stability, it can to greatest extent reduce and convert cold wind, reduce main air blower load, lift production capacity；
(4) a kind of metallurgical raw material drying exhaust gas dust recovery system of the present utility model, top is gradually closed up barrel-shaped
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 for other
System, 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 consumption；
(5) a kind of metallurgical raw material drying exhaust gas dust recovery system of the present utility model, the water conservancy diversion that homogeneous vertical formula is fixed
Dividing plate, the convection velocity of air rising was both improved, and the purpose of direct heat conduction can have been played again, by the in-house heat of flue gas cool-down
Amount conduction export, improves the in-house cooling rate of flue gas cool-down；
(6) a kind of metallurgical raw material drying exhaust gas dust recovery system of the present utility model, it is determined that accurate diaphragm
The radian of distribution is set, the angle of flare openings and dust board is set, the small only 50-200Pa of apparatus system pressure difference resistance damage, no
Influence main process system, it is not necessary to increase other devices, provide guarantee for flue gas qualified discharge, the pressure loss is small, or even may be used also
Repeatedly cooling, depositing dust are realized for 2~3 with series connection, the stability requirement of cloth bag is reduced, reduces the input of cloth bag；Reduction removes to secondary
Sack cleaner cloth bag temperature requirement in dirt, it ensure that the safe operation and cloth bag requirement of sack cleaner, while the row of reduction
Flue-gas temperature is put, more than 1mm bulky grain can be handled more than 95%, preventing the big bulky grain of amount of stored heat influences follow-up two
Secondary dedusting, 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) metallurgical raw material drying exhaust gas dust recovery system of the present utility model, the pressure 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) metallurgical raw material drying exhaust gas dust recovery system of the present utility model, flue gas cool-down mechanism diameter is fume pipe
More than 3 times of road, it is therefore an objective to when production technology fluctuation causes stress fluctuation, flue gas cool-down mechanism 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；
(9) metallurgical raw material drying exhaust gas dust recovery system of the present utility model, equally distributed atomizer, cooling are equal
Even, moreover, easily producing vapor, cooling effect is more obvious, efficiency high；
(10) metallurgical raw material drying exhaust gas dust recovery system of the present utility model, air-introduced machine plays to be forced to strengthen to air
The effect of convection current, further to improve heat exchange efficiency；External residual heat using device can carry out secondary use to waste heat；
(11) metallurgical raw material drying exhaust gas dust recovery system of the present utility model, the pure heat that can also exchange recovery are empty
Gas, upgrade for stoving process, realize that hot-air seasoning produces, there is provided solid guarantee；
(12) recovery process of metallurgical raw material drying exhaust gas dust recovery system of the present utility model, whole technical process drop
Temperature subtracts dirt, UTILIZATION OF VESIDUAL HEAT IN, fume recovery while carried out, moreover, avoiding to whole technical process influence of fluctuations, the product of drying
Steady quality.
Brief description of the drawings
Fig. 1 is that metallurgical raw material of the present utility model dries exhaust gas dust recovery system structural representation；
Fig. 2 is the B-B faces profile in Fig. 1；
Fig. 3 is the A-A faces profile in Fig. 1；
Fig. 4 is the C-C faces profile in Fig. 2；
Fig. 5 is the recovery process flow chart that metallurgical raw material of the present utility model dries exhaust gas dust recovery system.
In figure：1st, metallurgical raw material drying oven；2nd, one-level flue gas cool-down device for reducing dust；3rd, secondary smoke cooling device for reducing dust；
4th, dust arrester installation；21st, air delivery line；22nd, ash-laden gas ingress pipe；23rd, flue gas cool-down mechanism；24th, cloud of dust gas delivery line is subtracted；
25th, air conducting mechanism；26th, depositing dust dust leg；27th, air conducting reinforcing mechanisms；28th, two level subtracts cloud of dust gas delivery line；29th, it is strong
Cooling mechanism processed；210th, air intake；211st, heat-exchanger rig；221st, dust board；241st, flare openings；261st, ash-removing valve.
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 metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, as shown in Fig. 1,4, including：By subtracting cloud of dust gas
2 flue gas cool-down device for reducing dust of the serial communication of delivery line 24, respectively one-level flue gas cool-down device for reducing dust 2 and secondary smoke drop
Warm device for reducing dust 3；The dust arrester installation 3 that cloud of dust gas delivery line 28 connects is subtracted by two level with the secondary smoke device for reducing dust 3 that cools, can
To be sack cleaner or water dust scrubber, it is used after metal micronic dust is reclaimed；Wherein：Each flue gas cool-down device for reducing dust
Include：Air conducting mechanism 25, can be in vertical barrel-like structure, the present embodiment uses vertical barrel-like structure, a diameter of
3400mm, it is highly 4600mm, for cooling to whole device；In the inside of the air conducting mechanism 25, and it is and empty
Gas deflector 25 is in the flue gas cool-down mechanism 23 of cavity loop nested structure, also in vertical tubbiness, a diameter of 3000mm, is highly
4000mm, 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
The effect of dirt；The external dust constaining for passing air conducting mechanism 25 of flue gas cool-down mechanism 23 of one-level flue gas cool-down device for reducing dust 2
Gas ingress pipe 22 and subtract cloud of dust gas delivery line 24；The flue gas cool-down mechanism 23 of secondary smoke cooling device for reducing dust 3 is external to pass sky
The ash-laden gas ingress pipe 22 and two level of gas deflector 25 subtract cloud of dust gas delivery line 28.Ash-laden gas ingress pipe 22, subtract the cloud of dust
The diameter that gas delivery line 24 and two level subtract cloud of dust gas delivery line 28 is 1000mm, after ash-laden gas importing is handled, then will be subtracted
The flue gas export of dirt cooling.
Embodiment 2
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 1
Be in：Flue gas cool-down mechanism 23 is in the barrel-like structure of closing, avoids outer gas stream from producing fluctuation in whole technique to flue gas,
It is described to subtract cloud of dust gas delivery line 24 and two level subtracts the gas outlet of cloud of dust gas delivery line 28 and is both secured to the upper side of barrel-like structure,
Subtract the flue gas after dirt to export by the pipeline；The bottom of the barrel-like structure of flue gas cool-down mechanism 23 is in closing in shape, and depositing dust is put
Ash pipe 26 communicates, and is easy to the centralized collection of bulky grain flue dust and concentrates the secondary use after ash discharge；The one-level flue gas cool-down drop
The ash-laden gas ingress pipe 22 of dirt device 2 with being communicated at the top of flue gas cool-down mechanism 23 barrel-like structure, fix by barrel-like structure inwall
There is downwardly extending dust board 221, allow bulky grain flue dust because inertia and gravity are hit on dust board, and have time enough cooling simultaneously
Fall；Flue gas cool-down mechanism 23 tubbiness of the air inlet for subtracting cloud of dust gas delivery line 24 from secondary smoke cooling device for reducing dust 3
Penetrated at the top of structure, and be inserted into the bottom of barrel-like structure, increased in flue gas in the in-house flowing of whole flue gas cool-down
Distance, bulky grain flue dust is allowed to have time enough to cool and fall.
Embodiment 3
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 2
Be in：As shown in Figure 1,3, it is fixedly installed heat-exchanger rig inside the headspace delivery line 21 of the air conducting mechanism 25
211, can be board-like or pipe heat exchanger, heat exchange efficiency is high, and the heat that air conducting mechanism exchanges heat is inhaled by heat-exchanger rig
Receive, reach the effect of heat recovery and utilization；The dust board 221 is in deviate from the swash plate shape for subtracting cloud of dust gas delivery line 24, first
The top fixing end of swash plate is fixed on the top of flue gas cool-down mechanism 23, and by the import of ash-laden gas ingress pipe 22 and subtracts the cloud of dust
The outlet of gas delivery line 24 separates, and after dust board stops the bulky grain of flowing, is dropped due to the effect of inertia, and make flue gas
Air velocity gradually reduce, extend flue gas in the in-house flowing time of whole flue gas cool-down, further allow bulky grain flue dust
There is time enough to cool and fall；It is described subtract part that cloud of dust gas delivery line 24 is inserted inside barrel-like structure it is gradual under open
Flare openings 241, make the air velocity of flue gas gradually reduce, and avoid acutely reducing and causing technological fluctuation excessive, and gradually
Slow down the flowing velocity of ash-laden gas, extend flue gas in the in-house flowing time of whole flue gas cool-down, further allow bulky grain
Flue dust has time enough to cool and fall.Air conducting mechanism 25 is in the drum structure that top is gradually closed up, after being easy to heat exchange
Hot-air concentrate outflow after carry out secondary heat exchange utilization, diameter is more than the flue gas cool-down mechanism 23, in flue gas cool-down mechanism
Surrounding forms ring cavity；In the ring cavity of the cavity loop nested structure, stationary distribution has air conducting reinforcing mechanisms 27, improves empty
Gas velocity, and heat exchange efficiency is improved, ring cavity bottom is air intake 210.
Embodiment 4
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 3
Be in：Air conducting reinforcing mechanisms 27 be homogeneous vertical formula fix diaphragm, both improved air rising to flow velocity
Degree, the purpose of direct heat conduction can be played again, the in-house heat conduction export of flue gas cool-down is improved in flue gas cool-down mechanism
The cooling rate in portion.The top of flue gas cool-down mechanism 23, it is provided with the forced cooling machine for being fixed on the side wall of air conducting mechanism 25
Structure 29, to the barrel-like structure forced cooling of whole flue gas cool-down mechanism, when air conducting mechanism cooling-down effect unobvious, play
Supplement the effect of forced cooling.Forced cooling mechanism 29 can be equally distributed atomizer, lowering temperature uniform, and cooling face is big；
The heat-exchanger rig 211 is board-like or pipe heat exchanger, and heat exchange efficiency is high.
Embodiment 5
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 4
Be in：Air-introduced machine is fixed in the exit of air delivery line 21, is played a part of forced convertion, can be improved heat exchange efficiency, and outside
Residual heat using device, such as evaporator are connect, secondary use is carried out to waste heat；The exit of depositing dust dust leg 26 sets ash-removing valve
261, when stopping air inlet, concentrate bulky grain soot emissions.
Embodiment 6
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 4
Be in：Diaphragm is distributed as setting every 20 ° of radian, 18 altogether.The angle of flare openings 221 is 80 °.Dust-break
The included angle of plate 221 is 80 °；The diameter of air conducting mechanism 25 and flue gas cool-down mechanism 23 ratio is 1.1：1；Flue gas cool-down machine
Structure 23, ash-laden gas ingress pipe 22 and subtract the diameter ratio of cloud of dust gas delivery line 24 and be：(3~5)：1：1, in the present embodiment respectively
For：5500mm, 5000mm, 1000mm and 1000mm.
The recovery process of the metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, as shown in figure 5, step is：
Step 1: ash-laden gas imports：Ash-laden gas caused by metallurgical raw material drying oven 1, in flue dust rich in Fe, Zn, K,
The elements such as Na, typically more than 100 DEG C, and bulky grain flue dust is rich in, for example diameter is more than 1mm, by ash-laden gas ingress pipe 22
Import inside the flue gas cool-down mechanism 23 in one-level flue gas cool-down device for reducing dust 2；
Step 2: gravity inertial subtracts dirt：Bulky grain flue dust drops down onto dust board under its own gravity, inertial flow effect
221 surfaces, and fall to the bottom of flue gas cool-down mechanism 23 along dust board 221；
Step 3: flue gas cool-down：Subtract the flue gas after dirt during rising inside flue gas cool-down mechanism 23, led in air
In the presence of flowing mechanism 25, two mechanisms heat exchange, the bulk temperature of whole flue gas cool-down mechanism 23 declines, and subtracts the temperature of the flue gas after dirt
Degree is corresponding to be reduced；The bulky grain flue dust not dropped is by cold events, density increase, then in the presence of the stop of dust board 221, continues
The bottom of flue gas cool-down mechanism 23 is fallen to, i.e.,：Ash-laden gas either declines or risen inside flue gas cool-down mechanism 23
Cheng Zhong, due to cooling effect of the air conducting mechanism 25 to flue gas cool-down mechanism 23, can all there is bulky grain flue dust is lasting to drop,
If flue gas cool-down mechanism 23 is sufficiently high, in theory, all bulky grain flue dust can all be stopped and be dropped by gravity or inertia；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to two by subtracting cloud of dust gas delivery line 24
Level flue gas cool-down device for reducing dust 3；
Step 5: two level gravity subtracts dirt：Under the effect of flare openings 241, airflow velocity reduces, the bulky grain cigarette of residual
Dirt drops down onto the bottom of flue gas cool-down mechanism 23 of secondary smoke cooling device for reducing dust 3 under its own Action of Gravity Field；
Step 6: secondary smoke cools：Subtract flue gas cool-down mechanism of the flue gas after dirt in secondary smoke cooling device for reducing dust 3
23 inside rise during, in the presence of air conducting mechanism 25, two mechanisms heat exchange, whole flue gas cool-down mechanism 23 it is whole
Temperature declines, and subtracts the temperature accordingly secondary reduction of the flue gas after dirt；
Step 7: two level subtracts dirt cooling flue gas export：Subtract the flue gas after dirt cooling and cloud of dust gas delivery line 28 is subtracted by two level
Export to dust arrester installation 4 is passed through, reclaim metallic dust；Dust arrester installation 3 typically selects sack cleaner, and the flue gas that temperature is too high
Sack cleaner can be damaged；Sack cleaner can recycle and reuse metallic dust；
Step 8: waste heat recovery：Caused heat is led in air delivery line 21 after each air conducting mechanism 25 is exchanged heat
During going out, absorbed by heat-exchanger rig 211, such as board-like or pipe heat exchanger, and again by residual heat using device, for example steam
Send out device secondary use.
After testing, flue gas after treatment, after two level subtracts the export of cloud of dust gas delivery line 28, temperature is less than 80 DEG C, and will
More than 1mm bulky grain is reduced to less than 10%, will not produce destructive effect to final dusting device, after bag-type dust,
More than 95% miberal powder is just recovered, and flue gas dirt containing miberal powder is reduced to less than 5%.
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, the diameter of flue gas cool-down mechanism 23 is flue
5 times, 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 even
In the space of the flue gas cool-down mechanism 23 of twenties times of opposing seal, flue gas cool-down mechanism 23 plays " accumulator " effect, real
Now the steady of whole production system overall process, buffering and stability, are more matched, efficiency is more with reaching the parameter of whole system
Height, regulation are easier.
Embodiment 7
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 6
Be in：As shown in Figure 2,3, diaphragm is distributed as setting every 30 ° of radian, 12 altogether.The angle of flare openings 221
Spend for 70 °.The included angle of dust board 221 is 70 °
After testing, flue gas after treatment, after two level subtracts the export of cloud of dust gas delivery line 28, temperature is less than 70 DEG C, and will
More than 1mm bulky grain is reduced to less than 8%, will not produce destructive effect to final dusting device, after bag-type dust,
More than 97% miberal powder is just recovered, and flue gas dirt containing miberal powder is reduced to less than 3%.
Embodiment 8
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 6
Be in：Diaphragm is distributed as setting every 40 ° of radian, 9 altogether.The angle of flare openings 221 is 75 °.Dust-break
The included angle of plate 221 is 75 °.
After testing, flue gas after treatment, subtract cloud of dust gas delivery line 28 export after, temperature be less than 65 DEG C, and by 1mm with
On bulky grain reduce to less than 8%, will not produce destructive effect to final dusting device, after bag-type dust, 97% with
Upper miberal powder is just recovered, and flue gas dirt containing miberal powder is reduced to less than 3%.
Embodiment 9
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure is the same as embodiment 5, diaphragm distribution
To be set every 30 ° of radian, 12 altogether.The angle of flare openings 221 is 70 °.The included angle of dust board 221 is
70°
The recovery process of the metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, step are：
Step 1: ash-laden gas imports：Ash-laden gas caused by metallurgical raw material drying oven 1, more than 150 DEG C of flue dust temperature,
And bulky grain flue dust is rich in, for example diameter is more than 1mm, and one-level flue gas cool-down device for reducing dust 2 is imported by ash-laden gas ingress pipe 22
In flue gas cool-down mechanism 23 inside；
Step 2: gravity inertial subtracts dirt：Bulky grain flue dust drops down onto dust board under its own gravity, inertial flow effect
221 surfaces, and fall to the bottom of flue gas cool-down mechanism 23 along dust board 221；
Step 3: flue gas cool-down：Subtract the flue gas after dirt during rising inside flue gas cool-down mechanism 23, led in air
In the presence of flowing mechanism 25, two mechanisms heat exchange, the bulk temperature of whole flue gas cool-down mechanism 23 declines, and subtracts the temperature of the flue gas after dirt
Degree is corresponding to be reduced, and because entrance flue gas temperature early stage is too high, it is strong to start staving progress of the atomizer to flue gas cool-down mechanism 23
System cooling；Restart air-introduced machine, the convection current to the air in ring cavity is strengthened；So, to the staving of flue gas cool-down mechanism 23
The cooling-down effect of internal temperature increases exponentially, and plays a part of collaboration；The bulky grain flue dust not dropped is increased by cold events, density
Greatly, then in the presence of the stop of dust board 221, the bottom of flue gas cool-down mechanism 23 is persistently fallen to, i.e.,：Ash-laden gas drops in flue gas
Inside warm mechanism 23, either decline in still uphill process, because air conducting mechanism 25 is to the drop of flue gas cool-down mechanism 23
Temperature effect, can all have bulky grain flue dust is lasting to drop；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to two by subtracting cloud of dust gas delivery line 24
Level flue gas cool-down device for reducing dust 3；
Step 5: two level gravity subtracts dirt：Under the effect of flare openings 241, airflow velocity reduces, the bulky grain cigarette of residual
Dirt drops down onto the bottom of flue gas cool-down mechanism 23 of secondary smoke cooling device for reducing dust 3 under its own Action of Gravity Field；
Step 6: secondary smoke cools：Subtract flue gas cool-down mechanism of the flue gas after dirt in secondary smoke cooling device for reducing dust 3
23 inside rise during, in the presence of air conducting mechanism 25, two mechanisms heat exchange, whole flue gas cool-down mechanism 23 it is whole
Temperature declines, and can also start atomizer and carry out forced cooling to the staving of flue gas cool-down mechanism 23；Restart air-introduced machine,
Convection current to the air in ring cavity is strengthened, and subtracts the temperature accordingly secondary reduction of the flue gas after dirt；
Step 7: two level subtracts dirt cooling flue gas export：Subtract the flue gas after dirt cooling and cloud of dust gas delivery line 28 is subtracted by two level
Export to dust arrester installation 4 is passed through, reclaim metallic dust；Dust arrester installation 3 typically selects sack cleaner, and the flue gas that temperature is too high
Sack cleaner can be damaged；Sack cleaner can recycle and reuse metallic dust；
Step 8: waste heat recovery：Caused heat is led in air delivery line 21 after each air conducting mechanism 25 is exchanged heat
During going out, absorbed by heat-exchanger rig 211, such as board-like or pipe heat exchanger, and again by residual heat using device, for example steam
Send out device secondary use.
After testing, flue gas after treatment, although early stage, flue dust temperature was too high, two level subtracts cloud of dust gas delivery line 28 and exported
Afterwards, temperature is less than 50 DEG C, and more than 1mm bulky grain is reduced to less than 6%, final dusting device will not be produced destructive
Effect, after bag-type dust, more than 98% miberal powder is just recovered, and flue gas dirt containing miberal powder is reduced to less than 2%.It is additionally, since sky
Gas deflector 25 and flue gas cool-down mechanism 23 are relatively isolated, and strengthen convection current and forced cooling all without to flue gas cool-down mechanism 3
Inside smoke produces excessive fluctuation, would not also influence the fluctuation of whole technical process.
Embodiment 10
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 9
Be in：Because vapor is excessive caused by atomizer, heat-exchanger rig 211 can be influenceed and secondary waste heat utilizes the use of device
Life-span, therefore, for the ash-laden gas no more than 120 DEG C, atomizer can not be started, it is necessary to when, it is only necessary to start air inducing
Machine is that can reach the effect that cooling subtracts dirt.
Embodiment 11
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 9
Be in：As shown in figure 3, dust board 221 sets parallel to each other 3, by the flue gas uphill process of flue gas cool-down mechanism 23
It is divided into 3 parts, continues inertia to the bulky grain flue dust not dropped and stop that it rises and promotes it to drop.Can also be by dust board
221 are arranged to the upward arc plate of nock, and its effect is to fall to flue gas again after the bulky grain flue dust of edges of boards is first concentrated on into arc bottom
The bottom of cooling mechanism 23；Effect also is, the relative area of cambered surface is more than flat board, bulky grain flue dust drop during due to nothing
The motion of rule, and arc plate can stop the bulky grain of arbitrary motion, subtract dirt effect so as to improve.
Embodiment 12
The metallurgical raw material drying exhaust gas dust recovery system of the present embodiment, basic structure are different and improvement with embodiment 9
Be in：Heat-exchanger rig 211 is no longer fixedly installed inside air delivery line 21, is dropped drying flue gas cool-downs at different levels by induced duct
After the air delivery line 21 of dirt device connects, then the air after heat exchange led directly to by metallurgical raw material drying oven by air-introduced machine,
The pure hot-air of recovery upgrades for stoving process, realizes hot-air seasoning circulation production, has reclaimed the heat of heat exchange, and directly
Utilize, avoid conversion and waste, reduce production cost.
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 metallurgical raw material dries exhaust gas dust recovery system, it is characterised in that including：
By subtracting 2 flue gas cool-down device for reducing dust of cloud of dust gas delivery line (24) serial communication, respectively one-level flue gas cool-down drops
Dirt device (2) and secondary smoke cooling device for reducing dust (3)；
The dust arrester installation (4) that cloud of dust gas delivery line (28) connects is subtracted by two level with secondary smoke cooling device for reducing dust (3)；Its
In：
Each flue gas cool-down device for reducing dust includes：
Air conducting mechanism (25)；
Dropped in the inside of the air conducting mechanism (25), and with air conducting mechanism (25) in the flue gas of cavity loop nested structure
Warm mechanism (23)；
The external ash-laden gas ingress pipe (22) for passing air conducting mechanism (25) of the flue gas cool-down mechanism (23) and subtract the cloud of dust
Gas delivery line (24) or two level subtract cloud of dust gas delivery line (28).
2. metallurgical raw material according to claim 1 dries exhaust gas dust recovery system, it is characterised in that：
The flue gas cool-down mechanism (23) in closing barrel-like structure, it is described to subtract cloud of dust gas delivery line (24) and two level subtracts cloud of dust gas
The gas outlet of delivery line (28) is both secured to the upper side of barrel-like structure；The bottom of flue gas cool-down mechanism (23) barrel-like structure
Portion is in closing in shape, and depositing dust dust leg (26) communicates；The ash-laden gas ingress pipe of the one-level flue gas cool-down device for reducing dust (2)
(22) communicated with the top of flue gas cool-down mechanism (23) barrel-like structure, barrel-like structure inwall is fixed with downwardly extending dust board (221)；
Flue gas cool-down mechanism (23) tubbiness of the air inlet for subtracting cloud of dust gas delivery line (24) from secondary smoke cooling device for reducing dust (3)
Penetrated at the top of structure, and be inserted into the bottom of barrel-like structure.
3. metallurgical raw material according to claim 2 dries exhaust gas dust recovery system, it is characterised in that：
Heat-exchanger rig (211) is fixedly installed inside the headspace delivery line (21) of the air conducting mechanism (25)；
The dust board (221) is in consolidate away from the swash plate shape for subtracting cloud of dust gas delivery line (24), the top fixing end of first swash plate
Due to the top of flue gas cool-down mechanism (23), and by the import of ash-laden gas ingress pipe (22) and subtract cloud of dust gas delivery line (24)
Outlet separates；
The part subtracted inside cloud of dust gas delivery line (24) insertion barrel-like structure is the flare openings (241) opened under gradually.
4. metallurgical raw material according to claim 3 dries exhaust gas dust recovery system, it is characterised in that：The air conducting
Mechanism (25) is in the drum structure that top is gradually closed up, and diameter is more than the flue gas cool-down mechanism (23)；In the cavity ring set
In the ring cavity of formula structure, stationary distribution has air conducting reinforcing mechanisms (27), and ring cavity bottom is air intake (210).
5. metallurgical raw material according to claim 4 dries exhaust gas dust recovery system, it is characterised in that：The air conducting
Reinforcing mechanisms (27) are the diaphragm that homogeneous vertical formula is fixed.
6. metallurgical raw material according to claim 5 dries exhaust gas dust recovery system, it is characterised in that：The diaphragm
It is distributed as the radian setting every 20~40 °；The angle of the flare openings (241) and dust board (221) is 70~
80°。
7. metallurgical raw material according to claim 5 dries exhaust gas dust recovery system, it is characterised in that：The flue gas cool-down
The top of mechanism (23), it is provided with the forced cooling mechanism (29) for being fixed on air conducting mechanism (25) side wall.
8. metallurgical raw material according to claim 7 dries exhaust gas dust recovery system, it is characterised in that：The forced cooling
Mechanism (29) is equally distributed atomizer；The heat-exchanger rig (211) is board-like or pipe heat exchanger.
9. metallurgical raw material according to claim 7 dries exhaust gas dust recovery system, it is characterised in that：The air export
Manage (21) exit and fix air-introduced machine, and external residual heat using device；Depositing dust dust leg (26) exit sets ash-removing valve
(261)。
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| CN107243186A (en) * | 2017-07-24 | 2017-10-13 | 马鞍山钢铁股份有限公司 | A kind of metallurgical raw material drying exhaust gas dust recovery system and its recovery process |
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