CN109708125A - A kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace - Google Patents
A kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace Download PDFInfo
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- CN109708125A CN109708125A CN201910113561.5A CN201910113561A CN109708125A CN 109708125 A CN109708125 A CN 109708125A CN 201910113561 A CN201910113561 A CN 201910113561A CN 109708125 A CN109708125 A CN 109708125A
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- flue gas
- rotary kiln
- heavy metal
- low
- temperature flue
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- 229910052785 arsenic Inorganic materials 0.000 title claims abstract description 42
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000002893 slag Substances 0.000 title claims abstract description 42
- 238000002844 melting Methods 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 title claims abstract description 34
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 31
- 238000003723 Smelting Methods 0.000 title claims abstract description 26
- 239000010814 metallic waste Substances 0.000 title claims abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000003546 flue gas Substances 0.000 claims abstract description 63
- 230000007246 mechanism Effects 0.000 claims abstract description 44
- 239000007789 gas Substances 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 21
- 238000005192 partition Methods 0.000 claims description 12
- 239000000446 fuel Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 8
- 229910001060 Gray iron Inorganic materials 0.000 claims description 7
- 239000003500 flue dust Substances 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 15
- 230000008018 melting Effects 0.000 abstract description 10
- 238000000197 pyrolysis Methods 0.000 abstract description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000001354 calcination Methods 0.000 abstract description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052753 mercury Inorganic materials 0.000 abstract description 5
- 239000005416 organic matter Substances 0.000 abstract description 5
- 229910052725 zinc Inorganic materials 0.000 abstract description 5
- 239000011701 zinc Substances 0.000 abstract description 5
- 229910052793 cadmium Inorganic materials 0.000 abstract description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010802 sludge Substances 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000004821 distillation Methods 0.000 description 6
- 125000005843 halogen group Chemical group 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000003795 desorption Methods 0.000 description 4
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- 239000002817 coal dust Substances 0.000 description 3
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- 238000010438 heat treatment Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001784 detoxification Methods 0.000 description 2
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- 239000002994 raw material Substances 0.000 description 2
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical compound [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- BMSYAGRCQOYYMZ-UHFFFAOYSA-N [As].[As] Chemical compound [As].[As] BMSYAGRCQOYYMZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnaces, including airlock feeding machine, rotary kiln, vertical incinerator, high-temperature flue gas room and broken discharging mechanism, the airlock feeding machine is connected with rotary kiln, the rotary kiln is connected with vertical incinerator, the vertical incinerator is connected with broken discharging mechanism, the high-temperature flue gas room is wrapped in outside the rotary kiln, and the cylinder of rotary kiln is connected with high-temperature flue gas room both ends and vertical incinerator casing by sealing ring.Material is by the way that after the two stage combustion process of rotary kiln and vertical incinerator, high-temperature flue gas is discharged by rotary kiln and high-temperature flue gas room exhanst gas outlet, after residue is by broken discharging mechanism effect after burning, thoroughly realizes that burning is complete.The processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace that the present invention is arranged are as calciner, not only simple in equipment is unique, easy to operate, low cost, by the Particular craft of two segments combined calcining to such as arsenic alkaline slag of industrial residue containing low-melting heavy metal, containing melting waste slags such as arsenic, mercury, lead, zinc, cadmium sludge, it is also applied for the burning of pyrolysis of waste containing organic matter.
Description
Technical field
The invention belongs to incinerator and its correlative technology fields, and in particular to a kind of processing arsenic alkaline slag and low-melting heavy metal
Waste residue combined type smelting furnace.
Background technique
With the development of economy, industrial residue and industrial refuse are more and more, and industrial residue containing low-melting heavy metal is for example
Arsenic alkaline slag contains the melting waste slags such as arsenic, mercury, lead, zinc, cadmium sludge, directly stacking or buried these waste materials of processing, will lead to and wherein contains
Some noxious materials dissolve out and pollute environment, it is therefore desirable to carry out special storage, nonetheless, leakage thing also frequently occur
Part, the pollution problem of industrial residue have become the bottleneck factor for restricting industry development.
Grate furnace, fluid bed furnace, rotary kiln, vertical direct-combustion furnace, vertical pyrolysis oven is usually used in existing incinerating method
Equal incinerators are burned, and it is the structure of monomer combustion room mostly, substantially that these incinerators, which mainly handle industrial refuse,
Anaerobic (or anoxic) pyrolytic gasification is not provided with and multi-form burning melting or system that high-temperature calcination combines, to complicated component
Industrial refuse clean-burning purpose is not achieved, can not achieve substance to be processed different temperatures make different temperatures melt distillation
Obtain it is different wave compound matter, the processing of exhaust gas and waste residue cannot be truly realized innoxious, recycling treatment.
To reduce harm of harmful solid waste to environment, be badly in need of one kind can be realized it is different in kiln for different melting points substance
Temperature gasification distils and collects, and poisonous and harmful substance in waste residue is desorbed thoroughly, eliminates harm, collects useful component, realizes and burns
Tie the incinerator of product no pollution to the environment.
106468436 A of patent of invention CN discloses a kind of novel process arsenic alkaline slag and the combination of low-melting heavy metal waste residue
Formula smelting furnace, including rotary kiln and main furnace, rotary kiln include furnace body, feed inlet, furnace tail.Rotary kiln and ground inclination angle are 15
Degree, feed inlet are higher than furnace tail, and kiln tail is walked even in the furnace chamber of main furnace with main furnace connection, the two sides setting support heat of furnace body
Circle, middle part are equipped with transmission gear ring, are driven gear ring and driving structure is cooperatively connected, kiln tail is provided with cooling solar or lunar halo group,
Cooling solar or lunar halo group includes blast pipe, multiple air inlet pendant mouths, the cooling solar or lunar halo in periphery, the circumference of air inlet pendant mouth and periphery cooling solar or lunar halo to
Tangential connection, and the triangular angular of the cooling solar or lunar halo axial direction in periphery is 30-40 degree, the cooling solar or lunar halo tail portion in periphery and rotary kiln, main furnace
Proximity be provided with thermal insulation layer.
Patent of invention CN107178786 A proposes a kind of combined type incinerator, is by Rotation error and fluidisation
Bed incinerator is combined use, including fluidized bed incinerator side and Rotation error connection, receives Rotation error
The uncombusted waste of legal person is fallen into from kiln hood to kiln tail from top to bottom, the other side of fluidized bed incinerator and two burner of Horizontal sedimentation connect
It is logical, flue gas is delivered to two burner of Horizontal sedimentation, while two burner of Horizontal sedimentation is provided with ammonia atomization nozzle and dust settling
Capturing device.
Summary of the invention
In order to overcome the problems of the prior art, the present invention provides a kind of processing arsenic alkaline slag and low-melting heavy metal waste residues
Combined type smelting furnace realizes organic matter pyrolysis desorption, low-melting heavy metal by the improvement to rotary kiln and vertical incinerator
The process of distillation melting, strong applicability, to such as arsenic alkaline slag of industrial residue containing low-melting heavy metal, containing arsenic, mercury, lead, zinc dirt
The melting waste slags such as mud are applicable in, and are also applied for the burning of pyrolysis of waste containing organic matter.
To achieve the goals above, the invention is realized by the following technical scheme:
A kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that including lock feeding
Machine, rotary kiln, vertical incinerator, high-temperature flue gas room and broken discharging mechanism, the airlock feeding machine is connected with rotary kiln, described
Rotary kiln is connected with vertical incinerator, and the vertical incinerator is connected with broken discharging mechanism, and the high-temperature flue gas room is wrapped in
Outside the rotary kiln；
The rotary kiln includes that feed end, cylinder, supporting mechanism, transmission mechanism, kiln exit gas room, exhanst gas outlet, L-type are raised
Flitch and discharge end；The supporting mechanism is located at the both ends of the cylinder, and the transmission mechanism and kiln exit gas room are located at turn around
The feed end of kiln, the L-type lifting blade are located on the cylinder；
The vertical incinerator includes vertical heater casing, burns burner hearth, fuel inlet, exhanst gas outlet and observation window, described
Fuel inlet is located in vertical burning furnace sidewall, and the vertical heater exhanst gas outlet is located at the top of vertical incinerator；
The cylinder of rotary kiln passes through sealing ring phase with high-temperature flue gas room both ends, vertical incinerator casing and kiln exit gas room
Even.
Further, the rotary kiln draw ratio be 5-8, the vertical incinerator ratio of height to diameter be 3-5, the rotary kiln from
Feed end is to discharge end inclined decline arrangement, slope 1-4%.
Further, inclined surface necking is arranged in the vertical incinerator and rotary kiln discharge end junction, and lower part is burned
Burner hearth slopes inwardly, tilt angle >=45 °.
Further, the high-temperature flue gas room includes high-temperature flue gas room casing, smoke-box partition wall, flue-dust retainer, ash hole, flue gas
Cross over pipe, circulation wind inlet and exhanst gas outlet, the flue-dust retainer are located at the lower part of high-temperature flue gas room, and the exhanst gas outlet is located at height
The top of warm smoke chamber, the circulation wind inlet are located on flue gas cross over pipe, and the flue gas cross over pipe is connected with vertical incinerator.
Further, the flue gas cross over pipe is connected with vertical incinerator and bottom is designed as inclined surface, and inclination angle >=
45 °, junction is additionally provided with high-temperature expansion joint.
Further, high-temperature flue gas room length is the 80-90% of two supporting mechanism distance of rotary kiln, section the ratio of width to height
For 0.5-2, the road 1-3 is arranged according to high-temperature flue gas room length in the indoor partition, and vent position, partition wall is arranged in partition wall alternatively up and down
Middle part can be passed through equipped with cylinder of rotary kiln and rotatable through-hole.
Further, the broken discharging mechanism include tower fire grate, grey iron block, transmission vertical shaft, aggregate bin, discharge nozzle,
Driving mechanism and natural wind inlet, the tower fire grate can rotate and is connected with driving mechanism by being driven vertical shaft, described
Grey iron block is fixed on vertical heater casing, and the aggregate bin is located at broken discharging mechanism lower part, and the discharge nozzle is located under aggregate bin
Portion, the nature wind inlet are located on aggregate bin side wall.
Further, the transmission mechanism includes transmission gear wheel, bearing connecting shaft, retarder and motor.
It further, is steel construction outside the vertical incinerator casing and high-temperature flue gas room casing, successively liner is kept the temperature
Material and refractory material, it is high temperature alkali resistant material that the vertical incinerator, which burns the refractory material in burner hearth, other positions use
Fireclay refractory.
Further, the processing arsenic alkaline slag and each smoke entrance of low-melting heavy metal waste residue combined type smelting furnace, height
Warm smoke chamber, kiln exit gas room, burn burner hearth in be equipped with pressure monitor, temperature monitor, flow monitoring instrument, the blanking
Ash temperature monitor, the pressure monitor, temperature monitor, flow monitoring instrument and ash temperature monitor point are set in pipe
It is not connected with the computer control system of peripheral hardware.
Beneficial effects of the present invention are as follows:
(1) processing arsenic alkaline slag provided by the invention and low-melting heavy metal waste residue combined type smelting furnace by by rotary kiln and
Vertical incinerator is used in combination, so that the adaptability of whole system enhances, anaerobic (or anoxic) pyrolytic gasification and height may be implemented
Temperature the calcining multi-form burning or melting that combine, be applicable in such as arsenic alkaline slag of industrial residue containing low-melting heavy metal, contain arsenic,
The process of the melting waste slags such as mercury, lead, zinc, cadmium sludge distillation melting, is also applied for the burning of pyrolysis of waste containing organic matter, Neng Goushi
Existing organic matter pyrolysis desorption method.Waste residue after treatment carries out Thermal desorption distillation in rotary kiln, and residual residue is vertical
By residue completely burned in incinerator.
(2) present invention is by being arranged exhanst gas outlet in rotary kiln and high-temperature flue gas room, by what is generated after processing waste residue burning
High-temperature flue gas is used for the indirect heating heat source of rotary kiln, reduces external discharge, it is therefore prevented that the wasting of resources and environmental pollution are led to
The setting cold wind import at unicom pipeline is crossed, the temperature in high-temperature flue gas room and rotary kiln can be adjusted, it is ensured that waste residue
Preference temperature required for disposing.
(3) the processing arsenic alkaline slag that is arranged of the present invention and low-melting heavy metal waste residue combined type smelting furnace be as calciner,
Not only simple in equipment is unique, easy to operate, low cost, and by the Particular craft of two segments combined calcining, can be true
Protect arsenic alkaline slag, containing melting waste slags high temperature detoxifications such as arsenic, mercury, lead, zinc, cadmium sludge.
(4) the processing arsenic alkaline slag that is to provide of the present invention and low-melting heavy metal waste residue combined type smelting furnace are by by castaway slag
Material carries out high temperature incineration processing, can eliminate its toxic hazard.Energy disposal process of the present invention is short, economize on resources, reduces energy consumption, section
About production cost meets the requirement developed a circular economy with sustainable development, can organize enlarged industrial production completely.
Detailed description of the invention
Fig. 1 is processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace structural schematic diagram；
Fig. 2 is rotary kiln schematic diagram of transmission mechanism；
1, airlock feeding machine；11, feed inlet；12, discharge port；
2, rotary kiln；21, feed end；22, cylinder；23, supporting mechanism；24, transmission mechanism；25, kiln exit gas room；26,
Exhanst gas outlet；27, discharge end；28, sealing ring；241, it is driven gear wheel；242, bearing connecting shaft；243, retarder；244, electric
Motivation；
3, vertical incinerator；31, vertical heater casing；32, burner hearth is burned；33, fuel inlet；34, vertical heater exhanst gas outlet；
35, observation window；
4, high-temperature flue gas room；41, high-temperature flue gas room casing；42, smoke-box partition wall；43, flue-dust retainer；44, ash hole；45, cigarette
Gas cross over pipe；46, wind inlet is recycled；47, exhanst gas outlet；
5, it is crushed discharging mechanism；51, tower fire grate；52, grey iron block；53, it is driven vertical shaft；54, aggregate bin；55, discharge nozzle；
56, driving mechanism；57, natural wind inlet；
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and specific implementation
Example, the present invention will be described in further detail.
As shown in Figs. 1-2, the present invention provides a kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace,
Including airlock feeding machine 1, rotary kiln 2, vertical incinerator 3, high-temperature flue gas room 4 and broken discharging mechanism 5, the airlock feeding machine
1 is connected with rotary kiln 2, and the rotary kiln 2 is connected with vertical incinerator 3, the vertical incinerator 3 and broken 5 phase of discharging mechanism
Even, the high-temperature flue gas room 4 is wrapped in outside the rotary kiln 2, the cylinder of rotary kiln 22 and 4 both ends of high-temperature flue gas room and vertical
Formula incinerator casing 31 is connected by sealing ring 28.
The airlock feeding machine 1 is spiral airlock feeding machine, including material feed inlet 11, spiral, transmission mechanism and discharging
Mouth 12, the discharge port 12 is directly connected with kiln exit gas room 25, and material is sent into rotary kiln 2.
The rotary kiln includes feed end 21, cylinder 22, supporting mechanism 23, transmission mechanism 24, kiln exit gas room 25, flue gas
Outlet 26, L-type lifting blade and discharge end 27, the supporting mechanism 23 are located at the both ends of the cylinder 22, the transmission mechanism 24
The feed end 21 of kiln 2 is located at turn around with kiln exit gas room 25, the L-type lifting blade is located on the cylinder 22, the driver
Structure 24 includes transmission gear wheel 241, bearing connecting shaft 242, retarder 243 and motor 244, under the action of motor 244,
Forwarding for material is realized by transmission gear wheel 241 and the cooperation of bearing connecting shaft 242, and 2 draw ratio of rotary kiln is
5-8,2 diameter of rotary kiln calculated and determined according to processing material requirement, and rotary kiln 2 is from feed end 21 to discharge end 27 in inclining
Drop arrangement obliquely downward, slope 1-4%, wherein cylinder of rotary kiln 22 is manufactured using high temperature corrosion-resisting special steel material for design, and described time
Rotary kiln cylinder 22 passes through high-temperature flue gas room or so casing 41, smoke-box partition wall 42 and enters in vertical heater across vertical heater casing 31.
The vertical incinerator 3 includes vertical heater casing 31, burns burner hearth 32, fuel inlet 33, vertical heater exhanst gas outlet
34 and observation window 35, the fuel inlet 33 be located in vertical burning furnace sidewall, the vertical heater exhanst gas outlet 34 be located at it is vertical
At the top of incinerator, 3 ratio of height to diameter of vertical incinerator is 3-5, burns area and is calculated and determined according to processing material requirement,
Inclined surface necking is arranged with 27 junction of rotary kiln discharge end in the vertical incinerator 3, and lower part burns burner hearth and slopes inwardly, and inclines
Rake angle >=45 ° enable material to throw the center of lower furnace to guarantee that the big lower furnace of upper furnace is small, wherein
It is steel construction outside vertical incinerator casing 31, the refractory material in burner hearth is high temperature alkali resistant material, other positions use clay
Refractory material.
The high-temperature flue gas 4 is the rectangle casing being wrapped in outside rotary kiln 2, including high-temperature flue gas room casing 41, smoke-box
Partition wall 42, flue-dust retainer 43, ash hole 44, flue gas cross over pipe 45, circulation wind inlet 46 and exhanst gas outlet 47, the flue-dust retainer 43
In the lower part of high-temperature flue gas room 4, the exhanst gas outlet 47 is located at the top of high-temperature flue gas room 24, and described circulation wind inlet 246
In on flue gas cross over pipe 245, being connected with vertical incinerator 3 the flue gas communicating pipe 45 and bottom is designed as inclined surface to prevent from accumulating
Ash, inclination angle >=45 °, junction are additionally provided with high-temperature expansion joint, to stop necessary high-temperature expansion amount, it is ensured that equipment safety,
It is steel construction, successively inner lining as thermal insulation material and refractory material outside its high temperature smoke-box casing 241.
The length of high-temperature flue gas room 4 is the 80-90% of two support construction distance of rotary kiln, and section the ratio of width to height is 0.5-2, cigarette
According to exhaust gas volumn and by speed designs, general flue gas is set by wind speed according to not higher than 0.5m/s room cross-sectional area in smoke-box
Meter, high-temperature flue gas room smoke-box partition wall 42 are arranged 1-3 according to smoke-box length and arrive, and vent position is arranged in smoke-box partition wall 42 alternatively up and down,
To extend flue gas in the cigarette indoor residence time.
The broken discharging mechanism 5 includes rotary tower fire grate 51, grey iron block 52, transmission vertical shaft 53, aggregate bin
54, discharge nozzle 55, driving mechanism 56 and natural wind inlet 57, the tower fire grate 51 and driving mechanism 56 pass through transmission vertical shaft
53 are connected, and the aggregate bin 54 is located at broken 5 lower part of discharging mechanism, and the discharge nozzle 55 is located at 54 lower part of aggregate bin, it is described oneself
Right wind inlet 57 is located on 54 side wall of aggregate bin, and the grey iron block 52 is fixed on vertical incinerator casing 31, with tower fire grate
51 form attrition crushing chamber, pass through shearing, attrition crushing material.
Smoke entrance in each system, kiln exit gas room, burns in burner hearth and is equipped with pressure monitoring at high-temperature flue gas room
Instrument, temperature monitor, flow monitoring instrument provide running in due course online monitoring data, by transmitter by each data transmission
Implement simulation control to computer control system, automatic governing air quantity, inlet amount and discharge rate realize automatic operation.Institute
It states and ash temperature monitor is set in feeder pipe, the pressure monitor, temperature monitor, flow monitoring instrument and ash temperature prison
Instrument is surveyed to be connected with the computer control system of peripheral hardware respectively.
Use process of the invention is specifically introduced by taking the burning of arsenic alkaline slag as an example, and steps are as follows:
It is crushed after first coal siliceous raw material being added in arsenic alkaline slag, the powder of preparation is direct by airlock feeding machine
It is sent into rotary kiln, under the rotation of cylinder of rotary kiln and the drive of lifting blade, so that powder is constantly rolled and connect with high-temperature gas
Heat is obtained after touch, improves temperature of charge, and when kiln temperature reaches 600 DEG C or so, arsenate is decomposed, the oxide of arsenic
Distillation, which is detached from, enters gas phase, is then discharged from rotary kiln exhanst gas outlet.Meanwhile by a large amount of insoluble after the alkali melted by heating in material
Object package becomes particle by the effect of rotary kiln, thus prevent a large amount of liquid phases of appearance and ring formation is caused to influence operating,
Granule materials enter in vertical incinerator the ventilation be conducive in furnace simultaneously, and material slowly flows in kiln with the inclined direction of kiln body
Into vertical incinerator, coal dust is added by fuel inlet in vertical incinerator, since the burning of coal dust generates a large amount of heat
Amount, so that temperature can achieve 900 DEG C or more in vertical incinerator burner hearth, temperature of charge continues to increase, can High Temperature Gas in material
The component for changing distillation is thoroughly detached from, by entering in high-temperature flue gas room after unicom pipeline, then from the cigarette of high-temperature flue gas room
Gas outlet discharge.Meanwhile the alkali in arsenic alkaline slag forms water soda glass body in conjunction with the silicon in siliceous raw material, not only contributes to arsenic
Arsenic, antimony in sour sodium, sodium antimonate are detached from, and are also beneficial to the formation of the mineral such as other silicates, aluminate, are increased in coal amount
Make that reduction reaction occurs in furnace in the case that oxygen content is less.
By the block material of high temperature sintering in vertical incinerator, since gravity is mobile to lower portion of furnace body, and by
Make its rapid cooling that bulk materials be caused to shrink and fragmentation in the cold air that lower portion of furnace body blasts, enters back into tower fire grate and iron
In the crusher chamber that brick is constituted, the crushing forces such as squeeze, shear since the rotation of fire grate generates, so that block is broken to fall on bottom collection
Hopper is simultaneously slipped out from discharge nozzle, spare as clinker.
Cold air is entered in furnace from bottom of furnace body by the gap of tower fire grate, carries out heat exchange with high-temperature material, no
Material can only be cooled down, moreover it is possible to gas temperature is improved, when reaching high temperature section, the effective mixed firinor fuel burning realized with coal dust.It is vertical
The high-temperature flue gas that the calcining of formula incinerator generates is divided into two parts, and a portion enters in rotary kiln, and another part enters high temperature
Smoke chamber increases the working efficiency of rotary kiln so that interior external heat may be implemented in rotary kiln, when rotary kiln when the temperature is excessively high,
It can be passed through cold air from the cold wind import of high-temperature flue gas room and vertical incinerator junction, reduce the temperature of rotary kiln to reach
To the temperature of suitable material, meanwhile, it is thorough that high-temperature flue gas a part is not also beneficial to material elevated temperature desorption into rotary kiln, wherein two
The distribution of transportation work style is adjusted by volume damper.
Flue gas is come out from rotary kiln exhanst gas outlet and high-temperature flue gas room exhanst gas outlet to be later used to turn round by recovery processing
The indirect heating heat source of kiln, can also be otherwise utilized；It is otherwise utilized after having broken off the particle processing that mechanism comes out.
Processing arsenic alkaline slag provided by the invention and low-melting heavy metal waste residue combined type smelting furnace, as calciner, no
Only simple in equipment is unique, easy to operate, low cost, and passes through the Particular craft of two segments combined calcining, it can be ensured that
High temperature detoxification is realized in the thorough processing of arsenic alkaline slag, arsenic flat stone with ropes attached at the sides slag etc..
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these explanations.For those skilled in the art, do not departing from
Under the premise of present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to protection model of the invention
It encloses.
Claims (10)
1. a kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that including airlock feeding machine,
Rotary kiln, vertical incinerator, high-temperature flue gas room and broken discharging mechanism, the airlock feeding machine are connected with rotary kiln, and described time
Rotary kiln is connected with vertical incinerator, and the vertical incinerator is connected with broken discharging mechanism, and the high-temperature flue gas room is wrapped in institute
It states outside rotary kiln；
The rotary kiln includes feed end, cylinder, supporting mechanism, transmission mechanism, kiln exit gas room, exhanst gas outlet, L-type lifting blade
And discharge end；The supporting mechanism is located at the both ends of the cylinder, and the transmission mechanism and kiln exit gas room are located at turn around kiln
Feed end, the L-type lifting blade are located on the cylinder；
The vertical incinerator includes vertical heater casing, burns burner hearth, fuel inlet, exhanst gas outlet and observation window, the fuel
Import is located in vertical burning furnace sidewall, and the vertical heater exhanst gas outlet is located at the top of vertical incinerator；
The cylinder of rotary kiln is connected with high-temperature flue gas room both ends, vertical incinerator casing and kiln exit gas room by sealing ring.
2. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
The rotary kiln draw ratio is 5-8, and the vertical incinerator ratio of height to diameter is 3-5, and the rotary kiln is in from feed end to discharge end
Inclination decline arrangement, slope 1-4%.
3. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
Inclined surface necking is arranged in the vertical incinerator and rotary kiln discharge end junction, and lower part burns burner hearth and slopes inwardly, inclination
Angle >=45 °.
4. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
The high-temperature flue gas room includes high-temperature flue gas room casing, smoke-box partition wall, flue-dust retainer, ash hole, flue gas cross over pipe, circulation wind inlet
And exhanst gas outlet, the flue-dust retainer are located at the lower part of high-temperature flue gas room, the exhanst gas outlet is located at the top of high-temperature flue gas room, institute
It states circulation wind inlet to be located on flue gas cross over pipe, the flue gas cross over pipe is connected with vertical incinerator.
5. processing arsenic alkaline slag according to claim 4 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
The flue gas cross over pipe is connected with vertical incinerator and bottom is designed as inclined surface, inclination angle >=45 °, and junction is additionally provided with height
Warm expansion joint.
6. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
High-temperature flue gas room length is the 80-90% of two supporting mechanism distance of rotary kiln, and section the ratio of width to height is 0.5-2, the interior
The road 1-3 is arranged according to high-temperature flue gas room length in partition wall, and it is logical that partition wall is arranged vent position alternatively up and down and rotary kiln can pass through
Hole.
7. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
The broken discharging mechanism include tower fire grate, grey iron block, transmission vertical shaft, aggregate bin, discharge nozzle, driving mechanism and natural wind into
Mouthful, the tower fire grate can rotate and is connected with driving mechanism by being driven vertical shaft, and the grey iron block is fixed on vertical heater machine
On shell, the aggregate bin is located at broken discharging mechanism lower part, and the discharge nozzle is located at aggregate bin lower part, the nature wind inlet position
In on aggregate bin side wall.
8. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
The transmission mechanism includes transmission gear wheel, bearing connecting shaft, retarder and motor.
9. processing arsenic alkaline slag according to claim 1 and low-melting heavy metal waste residue combined type smelting furnace, which is characterized in that
The vertical incinerator casing and high-temperature flue gas room casing outside are steel construction, successively inner lining as thermal insulation material and refractory material, institute
Stating the refractory material that vertical incinerator burns in burner hearth is high temperature alkali resistant material, other positions use fireclay refractory.
10. processing arsenic alkaline slag described in -9 and low-melting heavy metal waste residue combined type smelting furnace, feature exist according to claim 1
In the processing arsenic alkaline slag and each smoke entrance of low-melting heavy metal waste residue combined type smelting furnace, high-temperature flue gas room, kiln tail cigarette
It is equipped with pressure monitor, temperature monitor, flow monitoring instrument in gas chamber, burning burner hearth, lime-ash temperature is set in the feeder pipe
Spend monitor, the pressure monitor, temperature monitor, flow monitoring instrument and ash temperature monitor respectively with the calculating of peripheral hardware
Machine control system is connected.
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| CN201910113561.5A CN109708125A (en) | 2019-02-14 | 2019-02-14 | A kind of processing arsenic alkaline slag and low-melting heavy metal waste residue combined type smelting furnace |
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| CN113970100A (en) * | 2020-07-22 | 2022-01-25 | 中冶长天国际工程有限责任公司 | Hazardous waste pyrolysis incineration system and hazardous waste pyrolysis incineration method |
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