CN207193362U - A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit - Google Patents
A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit Download PDFInfo
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- CN207193362U CN207193362U CN201720941112.6U CN201720941112U CN207193362U CN 207193362 U CN207193362 U CN 207193362U CN 201720941112 U CN201720941112 U CN 201720941112U CN 207193362 U CN207193362 U CN 207193362U
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Abstract
The utility model discloses a kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit, belongs to rotary hearth furnace zinc powder recycling technical field.The utility model includes at least two by subtracting the rotary hearth furnace flue gas cool-down device for reducing dust of cloud of dust gas delivery line serial communication；The dust arrester installation that cloud of dust gas delivery line connects is subtracted by final stage with the rotary hearth furnace flue gas cool-down device for reducing dust of end；Flue gas cool-down mechanism is in the barrel-like structure of closing, and for zinc-containing dust flue gas ingress pipe with being communicated at the top of barrel-like structure, barrel-like structure inwall is fixed with downwardly extending dust board；Subtract the upper side that cloud of dust gas delivery line is fixed on barrel-like structure；The bottom of the barrel-like structure is in closing in shape, and depositing dust dust leg communicates.The utility model is relatively isolated to flue gas cool-down by least two-stage forced cooling mechanism and air guide mechanism, and pass through natural gravity and inertial dust collection, reach recovery crude zinc powder, and flue gas cool-down to less than 150 DEG C, and ensure the stable purpose of whole recovery process system.
Description
Technical field
Rotary hearth furnace zinc powder recycling technical field is the utility model is related to, more particularly to a kind of rotary hearth furnace zinc powder flue gas returns
Receive pretreatment unit.
Background technology
Caused sludge Dust Capacity is the 10% of output of steel in steel production, and the dezincification of rotary hearth furnace metallized pellet produces
Line, is mainly used in direct-reduction processing steel plant metallurgy sludge dust, with elements such as Zn, K in recovered flue gas in its production process,
Because the particularity of the elements such as Zn, K causes recovery process complexity, existing rotary hearth furnace metallized pellet dezincification apparatus for production line
Configuration is perfect not to the utmost, operating rate is not high, and big to the main technogenic influence of production process.
Because dezincification temperature is higher, zinc containing gaseous state, liquid Zn in flue gas, generally in temperature-fall period is reclaimed, it is bonded in and changes
Caused in hot device heat exchanger block, it is necessary to frequently cleaning maintenance, and temperature it is high flue gas fluctuation be easy to the last recovery of scaling loss
Cloth bag.
Simultaneously in order to ensure that flue gas enters existing general bag-type dust collector, it is required for design and installation to convert cold blast sliding valve reduction
Flue-gas temperature, the treating capacity of gas cleaning is not only increased, because blast increases, is also easy to cause the fluctuation for producing main technique,
The energy consumption of main air blower is also increased simultaneously.
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 the zinc-containing dust flue gas of dezincification technique,
Increasingly highlight.
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 connects one section of evaporator, one section of connection atomization cooling Venturi tube of evaporator, atomization cooling Venturi tube connection
Two sections of evaporator,
Two sections of connection economizers of evaporator, economizer connection inertia force dust arrester；Hot water in economizer enters evaporation
After two sections of one section of device and evaporator, saturated steam is produced by its internal flue gas with heat；Atomization cooling Venturi tube
It is interior to be provided with double medium spray guns.The utility model further relates to the waste heat recovery side of flue gas low-temperature section waste heat recovery apparatus of converter
Method.The atomized drop that flue gas sprays with double medium spray guns inside the atomization cooling Venturi tube is exchanged heat, the cigarette after heat exchange
Temperature degree is in the range of 580 DEG C -600 DEG C, so as to effectively contain the localized clusters of carbon monoxide in flue gas, avoids hair
It is raw to dodge quick-fried danger so that the equipment uses safer.But the utility model by one section of evaporator, two sections of evaporator come plus
The utilization of strong fume afterheat, and diameter processing is carried out to flue dust with spray gun and can not be recycled, that is, water source is wasted, is produced again
New pollution sources.
Utility model content
1. utility model technical problems to be solved
For the processing efficiency of dust collection of zinc-containing dust flue gas in rotary hearth furnace metallized pellet dezincification production line in the prior art
Low, cooling-down effect unobvious, installation convert the problem of cold blast sliding valve easily causes whole dezincification production-line technique fluctuation, the utility model
Provide a kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit.It passes through at least two-stage forced cooling mechanism and air guide machine
Structure is relatively isolated to flue gas cool-down, and by natural gravity and inertial dust collection, has reached recovery crude zinc powder, and flue gas cool-down arrives
Less than 150 DEG C, and ensure the stable purpose of whole recovery process system.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the utility model is：
A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit, including：At least two is connected by subtracting the series connection of cloud of dust gas delivery line
Logical rotary hearth furnace flue gas cool-down device for reducing dust；Cloud of dust gas is subtracted by final stage with the rotary hearth furnace flue gas cool-down device for reducing dust of end
The dust arrester installation of delivery line connection, is used after zincilate micronic dust is reclaimed；Wherein：The rotary hearth furnace flue gas cool-down depositing dust dress
Put including：Air conducting mechanism, for cooling to whole device；In the inside of the air conducting mechanism, and and air
Deflector is in the flue gas cool-down mechanism of cavity loop nested structure, and for bulky grain zincilate flue dust because temperature reduces, density becomes big,
Drop in the bottom of flue gas cool-down mechanism, reach the effect for subtracting dirt step by step；The flue gas cool-down mechanism is external to pass air conducting
The zinc-containing dust flue gas ingress pipe of mechanism and subtract cloud of dust gas delivery line；The flue gas cool-down mechanism is kept away in the barrel-like structure of closing
Exempt from outer gas stream and produce fluctuation, the top phase of the zinc-containing dust flue gas ingress pipe and barrel-like structure in whole technique to flue gas
Logical, barrel-like structure inwall is fixed with downwardly extending dust board, allows bulky grain zincilate flue dust because inertia and gravity are hit in dust board
On, and there is time enough to cool and fall；The upper side for subtracting cloud of dust gas delivery line and being fixed on barrel-like structure, after subtracting dirt
Flue gas exported by the pipeline；The bottom of the barrel-like structure is in closing in shape, and depositing dust dust leg communicates, and is easy to bulky grain to contain
Secondary use after the centralized collection and concentration ash discharge of zinc powder flue dust.
Further technical scheme, dust board are the upward arc plate of nock, and the bulky grain zincilate flue dust of edges of boards is first collected
In fall to flue gas cool-down actuator base again behind arc bottom；Effect also is that the relative area of cambered surface is more than flat board, bulky grain
Flue dust drop during due to random motion, and arc plate can stop the bulky grain of arbitrary motion, subtract dirt effect so as to improve
Fruit.
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 zinc-containing dust flue gas ingress pipe and subtract the outlet of cloud of dust gas delivery line and separate, dust board hinders the bulky grain of flowing
After gear, 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 machine
Flowing time in structure, bulky grain zincilate 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 oblique angle of the dust board is 70~80 °, is not had
The effect of inertial impaction, during angle too small, easily accumulation is not easy to drop particle in plate face.
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, and cost is low.
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 and discharge bulky grain zincilate flue dust.
A kind of pretreating process of rotary hearth furnace zinc powder off-gas recovery pretreatment unit, step are：
Step 1: zinc-containing dust flue gas imports：The flue gas of powder containing crude zinc is by zinc-containing dust flue gas ingress pipe caused by rotary hearth furnace
The flue gas cool-down imported in first rotary hearth furnace flue gas cool-down device for reducing dust is in-house；
Step 2: gravity inertial subtracts dirt：Bulky grain zincilate flue dust is in its own gravity, the effect of inertia irregularly flowed
Under drop down onto dust board surface, 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 zincilate flue dust not dropped is by cold events, density increase, then in the presence of dust board stop, persistently falls
Drop down onto flue gas cool-down actuator base；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to second by subtracting cloud of dust gas delivery line
Individual rotary hearth furnace flue gas cool-down device for reducing dust；
Step 5: the process of repeat step two, three and four, until to subtract flue gas derived from cloud of dust gas delivery line up to standard for final stage；
Step 6: final stage subtracts dirt cooling flue gas export：Subtract the flue gas after dirt cooling to subtract cloud of dust gas delivery line by final stage and lead
Go out, to dust arrester installation (3) is passed through, to complete the pretreatment recovery of zinc powder；
Step 7: 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, the recovery of zinc powder dust while carried out, moreover, being converted without increase cold
Air-valve, avoid blast change influences on whole dezincification production-line technique process variation.
3. beneficial effect
Using technical scheme provided by the utility model, compared with prior art, have the advantages that：
(1) a kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present utility model, each rotary hearth furnace flue gas cool-down drop
Dirt device can be handled zinc-containing dust flue gas, and rotary hearth furnace flue gas cool-down device for reducing dust is by air conducting mechanism to whole
Individual device is cooled, and bulky grain zincilate flue dust is because temperature reduces, and density becomes big, so as to drop in flue gas cool-down mechanism
Bottom, reaches the effect for subtracting dirt step by step, 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 the recovery of zinc-containing dust flue gas cool-down whereabouts, heat recovery synthesis
The purpose utilized, moreover, whole system converts cold blast sliding valve without increase, fluctuation will not be produced to the technique of whole system；
(2) a kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 damage is small, less than 150Pa, does not influence main process system
(fan capacity 12K Pa), it is not necessary to increase other devices, guarantee is provided for flue gas qualified discharge；The flowing of flue gas is V-shaped,
Increase in flue gas in the in-house flow distance of whole flue gas cool-down, allow bulky grain zincilate flue dust to have time enough cooling
And fall；Closing in shape bucket bottom, and depositing dust dust leg communicate, after being easy to the centralized collection of bulky grain zincilate flue dust and concentrating ash discharge
Secondary use, the Dust Capacity that whole device is collected is big, convenient production flexible organization can be cleared up with the cycle, and it is convenient to overhaul cleaning
Fast；After reducing flue-gas temperature, dreamboat can be reached and enter bag-type dust or water film dedusting retracting device, realize that cloth bag removes
Dirt substitutes electric precipitation production；
(3) a kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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, when further allowing bulky grain zincilate 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
Cold wind is converted, reduces main air blower load, lifts production capacity；And thoroughly solve the bonding of zinc-containing dust, blockage problem, and clear up conveniently
Fast；
(4) a kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present utility model, it is determined that accurate diaphragm
The radian of distribution is set and the angle of dust board is set, it is not necessary to increases other devices, guarantee is provided for flue gas qualified discharge, press
Power loss is small, or even can also connect more than 2, realizes repeatedly cooling, depositing dust, reduces the stability requirement of cloth bag, reduces cloth bag
Input；Reduce to sack cleaner cloth bag temperature requirement in final dusting, ensure that sack cleaner safe operation and
Cloth bag requirement, while discharge flue-gas temperature is reduced, more than 1mm bulky grain can be handled more than 95%, it is big to prevent amount of stored heat
Bulky grain influence follow-up final dusting, such as, if do not handled, bulky grain zincilate flue dust can be by the cloth bag in bag-type dust
(being usually chemical fibre material) scaling loss；Fully flue-gas temperature can be reduced by heat-shift, only ZnO little particles enter cloth bag,
Realize safe retrieving；
(7) rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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) rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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) rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present utility model, equally distributed atomizer, cooling are equal
Even, moreover, easily producing vapor, cooling effect is more obvious, efficiency high；But also it is when meeting that flue gas fluctuation is big in production
A kind of safeguard measure realization；Atomized water spraying fast cooling, it is possible to achieve zinc metal directly reclaims, it is not necessary to ensure again oxygen-containing
ZnO recyclings are changed into, bag collection efficiency is further improved, realizes qualified discharge；
(10) rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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) rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present utility model, clean heat caused by heat exchange are empty
Gas, it can be used for green-ball drying, or other productions, realize energy-saving and emission-reduction；
(12) pretreating process of rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present utility model, whole technical process
Cooling subtracts dirt, UTILIZATION OF VESIDUAL HEAT IN, fume recovery while carried out, moreover, avoiding to whole technical process influence of fluctuations.
Brief description of the drawings
Fig. 1 is rotary hearth furnace zinc powder off-gas recovery pretreatment unit structural representation of the present utility model；
Fig. 2 is the A-A faces profile in Fig. 1；
Fig. 3 is dust board profile of the present utility model；
Fig. 4 is dust board side view of the present utility model；
Fig. 5 is the pretreating process flow chart of rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present utility model.
In figure：1st, rotary hearth furnace；2nd, rotary hearth furnace flue gas cool-down device for reducing dust；3rd, dust arrester installation；21st, air delivery line；22nd, contain
Zinc powder cloud of dust 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 is put
Ash pipe；27th, air conducting reinforcing mechanisms；28th, final stage subtracts cloud of dust gas delivery line；29th, forced cooling mechanism；210th, air intake；
211st, heat-exchanger rig；221st, dust board；261st, ash-removing valve；2211st, plate muscle.
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 rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, as shown in figure 1, including：2 by subtracting cloud of dust gas
The rotary hearth furnace flue gas cool-down device for reducing dust 2 of the serial communication of delivery line 24；With the rotary hearth furnace flue gas cool-down device for reducing dust 2 of end
Subtract the dust arrester installation 3 of the connection of cloud of dust gas delivery line 28 by final stage, typically gathered dust using sack cleaner, zincilate micronic dust is returned
It is used after receipts；Wherein：The rotary hearth furnace flue gas cool-down device for reducing dust 2 includes：Air conducting mechanism 25, can be in vertical
Barrel-like structure, a diameter of 3400mm, it is highly 4600mm, for cooling to whole device；In the air conducting mechanism
25 inside, and the flue gas cool-down mechanism 23 with air conducting mechanism 25 in cavity loop nested structure, also in vertical tubbiness, diameter
It is highly 4000mm for 3000mm, for bulky grain zincilate flue dust because temperature reduces, density becomes big, drops in flue gas cool-down machine
The bottom of structure 23, reach the effect for subtracting dirt step by step；The flue gas cool-down mechanism 23 is external pass air conducting mechanism 25 contain zinc
Dust flue gas ingress pipe 22 and subtract cloud of dust gas delivery line 24；The flue gas cool-down mechanism 23 avoids outer in the barrel-like structure of closing
Portion's air-flow produces fluctuation, the top phase of the zinc-containing dust flue gas ingress pipe 22 and barrel-like structure to flue gas in whole technique
Logical, barrel-like structure inwall is fixed with downwardly extending dust board 221, allows bulky grain zincilate flue dust because inertia and gravity are hit in dust-break
On plate 221, and there is time enough to cool and fall；The upper side for subtracting cloud of dust gas delivery line 24 and being fixed on barrel-like structure
Face, subtract the flue gas after dirt and exported by the pipeline；The bottom of the barrel-like structure is in closing in shape, and depositing dust dust leg 26 communicates,
It is easy to the centralized collection of bulky grain zincilate flue dust and concentrates the secondary use after ash discharge.Zinc-containing dust flue gas ingress pipe 22, subtract
The diameter that cloud of dust gas delivery line 24 and final stage subtract cloud of dust gas delivery line 28 is 1000mm, and the diameter of flue gas cool-down mechanism 23 is flue gas
More than 3 times of pipeline, it is therefore an objective to which, when production technology fluctuation causes stress fluctuation, flue gas cool-down mechanism 23 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.
Embodiment 2
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, basic structure are different and improvement with embodiment 1
Be in：As shown in figure 3, dust board 221 is the upward arc plate of nock, the bulky grain zincilate flue dust of edges of boards is first concentrated on into arc
The bottom of flue gas cool-down mechanism 23 is fallen to behind bottom again；Effect also is that the relative area of cambered surface is more than flat board, bulky grain flue dust
Due to random motion during dropping, and arc plate can stop the bulky grain of arbitrary motion, and blocking surface is big, subtract so as to improve
Dirt effect.
Embodiment 3
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, basic structure are different and improvement with embodiment 2
Be in：Be fixedly installed heat-exchanger rig 211 inside the headspace delivery line 21 of air conducting mechanism 25, can be it is board-like or
Pipe heat exchanger, the heat that air conducting mechanism 25 exchanges heat is absorbed by heat-exchanger rig 211, reaches the effect of heat recovery and utilization
Fruit；The dust board 221 is in be fixed on cigarette away from the swash plate shape for subtracting cloud of dust gas delivery line 24, the top fixing end of first swash plate
The top of gas cooling mechanism 23, and by the import of zinc-containing dust flue gas ingress pipe 22 and subtract the outlet of cloud of dust gas delivery line 24 every
Open, after dust board 221 stops the bulky grain of flowing, dropped due to the effect of inertia, and make the air velocity of flue gas gradual
Reduce, extend flowing time of the flue gas in whole flue gas cool-down mechanism 23, further allow bulky grain zincilate flue dust to have enough
Time cool and fall.In the whole flue gas of flue gas cool-down mechanism 23 zinc containing gaseous state, liquid Zn in temperature-fall period due to inertia
Effect and drop, avoid being bonded in heat-exchanger rig 211 and result in blockage, and then thoroughly solve being bonded, blocking up for zinc-containing dust
Plug problem, and clear up convenient and swift.
Air conducting mechanism 25 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, and diameter is more than the flue gas cool-down mechanism 23, ring cavity is formed around flue gas cool-down mechanism；In the sky
In the ring cavity of the sleeved structure of chamber, stationary distribution has air conducting reinforcing mechanisms 27, improves air velocity, and improves heat exchange effect
Rate, ring cavity bottom are air intake 210.
Embodiment 4
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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.
Embodiment 5
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 and discharge bulky grain zincilate flue dust.
Embodiment 6
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 included angle of dust board 221 is 80 °；Air
Deflector 25 and the diameter of flue gas cool-down mechanism 23 ratio are 1.1：1；Flue gas cool-down mechanism 23, zinc-containing dust flue gas ingress pipe 22
It is with the diameter ratio for subtracting cloud of dust gas delivery line 24：3~5：1：1, be respectively in the present embodiment：5500mm, 5000mm, 1000mm and
1000mm。
The pretreating process of the rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, as shown in figure 5, step is：
Step 1: zinc-containing dust flue gas imports：The flue gas of powder containing crude zinc caused by rotary hearth furnace 1, the element such as rich Zn, K in flue dust,
Typically more than 500 DEG C, and bulky grain zincilate flue dust is rich in, for example diameter is more than 1mm, by zinc-containing dust flue gas ingress pipe 22
Import inside the flue gas cool-down mechanism 23 in first rotary hearth furnace flue gas cool-down device for reducing dust 2；
Step 2: gravity inertial subtracts dirt：Bulky grain zincilate flue dust is in its own gravity, the effect of inertia irregularly flowed
Under drop down onto the surface of dust board 221, 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 zincilate flue dust not dropped is by cold events, density increase, then the effect stopped in dust board 221
Under, persistently fall to the bottom of flue gas cool-down mechanism 23；I.e.：Zinc-containing dust flue gas inside flue gas cool-down mechanism 23, either under
In drop or uphill process, due to cooling effect of the air conducting mechanism 25 to flue gas cool-down mechanism 23, can all there is bulky grain to contain
Zinc powder flue dust is lasting to drop, if flue gas cool-down mechanism 23 is sufficiently high, in theory, all bulky grain zincilate flue dust all can be by
Gravity or inertia stop and dropped；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to the by subtracting cloud of dust gas delivery line 24
Two rotary hearth furnace flue gas cool-down device for reducing dust 2；
Step 5: the process of repeat step two, three and four, until final stage subtract cloud of dust gas delivery line 28 derived from flue gas reach
Mark；
Step 6: final stage subtracts dirt cooling flue gas export：Subtract the flue gas after dirt cooling and cloud of dust gas delivery line 28 is subtracted by final stage
Export the pretreatment recovery for dust arrester installation 4 is passed through, completing zinc powder；
Step 7: 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, and pass through residual heat using device, such as evaporator secondary use again.
After testing, flue gas after treatment, after final stage subtracts the export of cloud of dust gas delivery line 28, temperature is less than 150 DEG C, and will
More than 1mm bulky grain is reduced to less than 10%, will not produce destructive effect to bag-type dust collector, after bag-type dust,
More than 90% zinc powder is recovered, and flue gas zinc-containing dust is reduced to less than 5%.
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, basic structure are different and improvement with embodiment 6
Be in：Diaphragm is distributed as setting every 30 ° of radian, 12 altogether.The included angle of dust board 221 is 70 °.
After testing, flue gas after treatment, after final stage subtracts the export of cloud of dust gas delivery line 28, temperature is less than 120 DEG C, and will
More than 1mm bulky grain is reduced to less than 8%, will not produce destructive effect to bag-type dust collector, after bag-type dust,
More than 95% zinc powder is recovered, and flue gas zinc-containing dust is reduced to less than 3%.
Embodiment 8
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 included angle of dust board 221 is 75 °；3 logical
The rotary hearth furnace flue gas cool-down device for reducing dust 2 of the serial communication of over-subtraction cloud of dust gas delivery line 24；
After testing, flue gas after treatment, subtracting after cloud of dust gas delivery line 28 exports, temperature is less than 100 DEG C, and by 1mm
More than bulky grain reduce to less than 6%, will not produce destructive effect to bag-type dust collector, after bag-type dust, 97%
Above zinc powder is recovered, and flue gas zinc-containing dust is reduced to less than 3%.
Embodiment 9
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, basic structure is the same as embodiment 5, diaphragm distribution
To be set every 30 ° of radian, 12 altogether.The included angle of dust board 221 is 70 °.
The pretreating process of the rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, step are：
Step 1: zinc-containing dust flue gas imports：The flue gas of powder containing crude zinc caused by rotary hearth furnace 1, the element such as rich Zn, K in flue dust,
Typically more than 550 DEG C, and bulky grain zincilate flue dust is rich in, for example diameter is more than 1mm, by zinc-containing dust flue gas ingress pipe 22
Import inside the flue gas cool-down mechanism 23 in first rotary hearth furnace flue gas cool-down device for reducing dust 2；
Step 2: gravity inertial subtracts dirt：Bulky grain zincilate flue dust is in its own gravity, the effect of inertia irregularly flowed
Under drop down onto the surface of dust board 221, 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 zincilate flue dust not dropped by cold events,
Density increases, then in the presence of the stop of dust board 221, persistently falls to the bottom of flue gas cool-down mechanism 23；I.e.：The zincilate cloud of dust
Gas either declines in still uphill process, because air conducting mechanism 25 is to flue gas cool-down inside flue gas cool-down mechanism 23
The cooling effect of mechanism 23, can all there is bulky grain zincilate flue dust is lasting to drop；
Step 4: subtract dirt cooling flue gas export：Subtract the flue gas after dirt cooling to export to the by subtracting cloud of dust gas delivery line 24
Two rotary hearth furnace flue gas cool-down device for reducing dust 2；
Step 5: the process of repeat step two, three and four, until final stage subtract cloud of dust gas delivery line 28 derived from flue gas reach
Mark；
Step 6: final stage subtracts dirt cooling flue gas export：Subtract the flue gas after dirt cooling and cloud of dust gas delivery line 28 is subtracted by final stage
Export the pretreatment recovery for dust arrester installation 4 is passed through, completing zinc powder；
Step 7: 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, and pass through residual heat using device secondary use again.
After testing, flue gas after treatment, although early stage, flue dust temperature was too high, final stage subtracts cloud of dust gas delivery line 28 and exported
Afterwards, temperature is less than 80 DEG C, and more than 1mm bulky grain is reduced to less than 6%, bag-type dust collector will not be produced destructive
Effect, after bag-type dust, more than 98% zinc powder is recovered, and flue gas zinc-containing dust is reduced to less than 2%.It is additionally, since air
Deflector 25 and flue gas cool-down mechanism 23 are relatively isolated, and strengthen convection current and forced cooling all without in flue gas cool-down mechanism 3
Portion's flue gas produces excessive fluctuation, would not also influence the fluctuation of whole technical process.
Embodiment 10
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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 zinc-containing dust flue gas no more than 350 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.
Embodiment 11
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit of the present embodiment, basic structure are different and improvement with embodiment 9
Be in：As shown in Fig. 2 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 zincilate flue dust not dropped and stop that it rises and promotes it to drop.Such as Fig. 3,4
Shown, the radian of arc plate could be arranged to 90 to 120 °, and vertical plate muscle 2211 can also be uniformly distributed in arc plate surface, or
Vibrator is fixed on arc plate, to strengthen the landing of bulky grain zincilate flue dust.
Embodiment 12
The rotary hearth furnace zinc powder off-gas recovery pretreatment unit 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, rotary hearth furnace flue gases are dried by different levels by induced duct
Cool device for reducing dust air delivery line 21 connect after, then by air-introduced machine the clean hot air after heat exchange can be used for giving birth to
Ball is dried, and can also be led directly to rotary hearth furnace 1 or other productions, be realized energy-saving and emission-reduction.
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)
- A kind of 1. rotary hearth furnace zinc powder off-gas recovery pretreatment unit, it is characterised in that including：At least two is by subtracting the rotary hearth furnace flue gas cool-down device for reducing dust (2) of cloud of dust gas delivery line (24) serial communication；Gathered dust with the rotary hearth furnace flue gas cool-down device for reducing dust (2) of end by what final stage subtracted that cloud of dust gas delivery line (28) connects Device (3)；Wherein：The rotary hearth furnace flue gas cool-down device for reducing dust (2) 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 zinc-containing dust flue gas ingress pipe (22) for passing air conducting mechanism (25) of the flue gas cool-down mechanism (23) and subtract Cloud of dust gas delivery line (24)；The flue gas cool-down mechanism (23) is in the barrel-like structure closed, the zinc-containing dust flue gas ingress pipe (22) and barrel-like structure Top communicate, barrel-like structure inwall is fixed with downwardly extending dust board (221)；The cloud of dust gas delivery line (24) that subtracts is fixed on bucket The upper side of shape structure；The bottom of the barrel-like structure is in closing in shape, and depositing dust dust leg (26) communicates.
- 2. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 1, it is characterised in that：The dust board (221) it is the upward arc plate of nock.
- 3. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 1, 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 zinc-containing dust flue gas ingress pipe (22) and subtract cloud of dust gas delivery line (24) outlet separates.
- 4. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 3, 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. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 4, it is characterised in that：The air conducting Reinforcing mechanisms (27) are the diaphragm that homogeneous vertical formula is fixed.
- 6. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 5, it is characterised in that：The diaphragm It is distributed as the radian setting every 20~40 °；The oblique angle of the dust board (221) is 70~80 °.
- 7. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 5, 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. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 7, 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. rotary hearth furnace zinc powder off-gas recovery pretreatment unit according to claim 7, 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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| CN201720941112.6U CN207193362U (en) | 2017-07-31 | 2017-07-31 | A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit |
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| CN201720941112.6U CN207193362U (en) | 2017-07-31 | 2017-07-31 | A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107217151A (en) * | 2017-07-31 | 2017-09-29 | 马鞍山钢铁股份有限公司 | A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit and its pretreating process |
| CN109316889A (en) * | 2018-12-07 | 2019-02-12 | 徐州华阳饲料有限公司 | Feed factory feed chamber dust excluding hood and installation method |
| CN109368304A (en) * | 2018-12-07 | 2019-02-22 | 徐州华阳饲料有限公司 | The dust-extraction unit of feed factory discharge chamber |
-
2017
- 2017-07-31 CN CN201720941112.6U patent/CN207193362U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107217151A (en) * | 2017-07-31 | 2017-09-29 | 马鞍山钢铁股份有限公司 | A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit and its pretreating process |
| CN107217151B (en) * | 2017-07-31 | 2018-11-23 | 马鞍山钢铁股份有限公司 | A kind of rotary hearth furnace zinc powder off-gas recovery pretreatment unit and its pretreating process |
| CN109316889A (en) * | 2018-12-07 | 2019-02-12 | 徐州华阳饲料有限公司 | Feed factory feed chamber dust excluding hood and installation method |
| CN109368304A (en) * | 2018-12-07 | 2019-02-22 | 徐州华阳饲料有限公司 | The dust-extraction unit of feed factory discharge chamber |
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