CN105731840A - Device and method for treating garbage fly ash into cement raw material - Google Patents
Device and method for treating garbage fly ash into cement raw material Download PDFInfo
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- CN105731840A CN105731840A CN201610108231.3A CN201610108231A CN105731840A CN 105731840 A CN105731840 A CN 105731840A CN 201610108231 A CN201610108231 A CN 201610108231A CN 105731840 A CN105731840 A CN 105731840A
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- dioxin
- fly ash
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- 239000004568 cement Substances 0.000 title claims abstract description 61
- 239000010881 fly ash Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000002994 raw material Substances 0.000 title claims abstract description 27
- 239000002956 ash Substances 0.000 claims abstract description 103
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000008187 granular material Substances 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims description 81
- 239000007789 gas Substances 0.000 claims description 45
- 239000002817 coal dust Substances 0.000 claims description 16
- 230000009347 mechanical transmission Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000004566 building material Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 4
- 206010030113 Oedema Diseases 0.000 claims description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 3
- 208000035475 disorder Diseases 0.000 claims description 3
- 238000005243 fluidization Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000005406 washing Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000002920 hazardous waste Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a device and a method for treating garbage fly ash into a cement raw material. The device comprises a cement kiln, an offline spouting furnace, a fly ash conveying device and a separator, wherein the fly ash conveying device is used for conveying garbage fly ash to the offline spouting furnace; the offline spouting furnace is used for treating garbage fly ash through hot air introduced out from the cement kiln and used for separating fly ash granules from dioxin in the garbage fly ash; the fly ash conveying device is used for separating air with the fly ash granules and dioxin into fly ash granules and air with dioxin, used for outputting the fly ash granules from an ash discharge tube of the separator, and used for outputting the air with dioxin to the cement kiln from an exhaust tube of the separator; the cement kiln is adopted for high-temperature combustion of dioxin in the air with dioxin. Compared with a conventional wet-method process, the device has the characteristics of simple procedure, low energy consumption and low treatment cost, and as a relatively small amount of water is used in the device, a certain water resource can be saved.
Description
Technical field
The present invention relates to the process field of garbage flying ash, particularly relate to a kind of apparatus and method that garbage flying ash place is set to cement raw material.
Background technology
Garbage flying ash contains the material such as higher heavy metal and dioxin toxicity due to it, belongs to hazardous waste.Traditional disposal options of garbage flying ash is to enter hazardous waste security landfill field.In recent years, joint disposal for garbage flying ash, China achieves some achievements in research, the main component of the garbage flying ash produced due to waste incineration is substantially close with clinker, the part material (such as clay, limestone etc.) in manufacture of cement can be substituted, through the grog high-temperature calcination stage, heavy metal and dioxin in flying dust obtain volatilization and decompose, it is achieved thereby that the comprehensive utilization of resources of flying dust.
But containing substantial amounts of villaumite in flying ash, when flying dust burns till the stage at grog high temperature, there is vaporization at high temperature in chloride ion, the phenomenon of low temperature solidification enrichment, easily cause firing system Coating clogging, also can affect clinker quality simultaneously.
For above technological difficulties, Domestic Scientific Research institutes carries out some research work, in patent CN101333084A, disclose a kind of garbage flying ash pretreating process and become the process of cement raw material, its technical process is that flying dust is through washing, stirring, after adding the pretreating process such as heavy metal stabilizer, it is re-fed into cement kiln and prepares into cement through calcining.This technique flying dust need to pass through washing, stirring, adds multiple processing steps such as additive, process is complicated, in the water-washing process of flying dust, it is necessary to consume substantial amounts of domestic water, the waste water that place postpones needs to add waste water dis posal system, and whole technology investment is relatively big, and operating cost is high.In CN101386481A, disclose a kind of chloride ion utilized in bypass technology removing garbage flying ash, it is achieved that flying ash prepares the technical method of clinker.This technique is on the basis of quality coal in cement kiln systems, flying dust is sent into existing kiln system from positions such as existing kiln hood, kiln tail smoke-box, dore furnaces, and a set of bypass system is installed, this system one-time investment is big, the bypass system of design and kiln type, the type of furnace all has relation, and this technology needs bypass system to run continuously, and guarantee effectively reduces chloride ion content in flying dust.The ratio leaked informaton is had certain restriction by bypass system, and chlorine ion concentration in raw material be there are certain requirements.In addition the kiln ash bypassing releasing needs after-treatment.
Summary of the invention
The present invention seeks to a kind of apparatus and method that garbage flying ash place is set to cement raw material, it is compared with existing wet method (washing) technique, have that flow process is simple, invest feature low, that energy consumption is low, cost of disposal is low, be the important directions of future technical advances.
This invention address that technical problem adopts the following technical scheme that a kind of device that garbage flying ash place is set to cement raw material, it includes cement kiln, off-line spurts stove, fly ash carry device and separator；
Described fly ash carry device, spurts stove for garbage flying ash is delivered to described off-line；
Described off-line spurts stove, by the hot blast drawn from described cement kiln, garbage flying ash is processed, is separated with dioxin by the fly ash granule in garbage flying ash；
The air comprising fly ash granule and dioxin is separated into fly ash granule and the air comprising dioxin by described fly ash carry device, and fly ash granule is exported from the ash releasing tube of described separator, the described air comprising dioxin is exported to described cement kiln from the exhaust duct of described separator；
Dioxin in the air comprising dioxin is carried out high temperature incineration by described cement kiln.
Optionally, described fly ash carry device includes flying dust transmitting device and flying dust metering device；Described flying dust transmitting device includes Pneumatic conveyer and/or mechanical transmission device；Described flying dust metering device includes flying dust storehouse and metering delivering balance；Described Pneumatic conveyer connects with described flying dust storehouse with the discharge end of mechanical transmission device；The ash hole place in described flying dust storehouse is provided with gate, and described gate can close or open the ash hole in described flying dust storehouse, and the ash hole in described flying dust storehouse is positioned at the surface of described metering delivering balance.
Optionally, the spurt air inlet of stove of described off-line is connected to kiln head cover or the tertiary-air pipe of described cement kiln by blast pipe.
Optionally, the spurt air outlet of stove of described off-line is connected with separator by discharge pipe, so that the gas containing fly ash granule and dioxin is delivered to separator, described separator carry out expecting edema caused by disorder of QI from；Fly ash granule after process is drawn off by separator bottom, after cooling as the admixture producing building material product；The air outlet of described separator connects with the dore furnace of described cement kiln, with discharge it the low cloud of dust pneumatic transmission rich in dioxin enter cement kiln dore furnace burn, make dioxin thoroughly decompose.
This invention address that technical problem also adopts the following technical scheme that a kind of method that garbage flying ash place is set to cement raw material, it comprises the following steps:
S10, garbage flying ash is delivered to flying dust metering device by flying dust transmitting device；
S20, by garbage flying ash by, after the metering of described flying dust metering device, being delivered to described off-line and spurt stove；
Spurt S30, described the off-line stove kiln head cover from cement kiln or tertiary-air pipe extract hot blast to off-line and spurt stove；
S40, garbage flying ash after fluidization, are fully contacted heat exchange with described hot blast in off-line spurts stove, make the dioxin in garbage flying ash separate with fly ash granule, and dioxin is distributed in flue gas；
S50, the air containing dioxin and fly ash granule is delivered to separator it is easily separated, fly ash granule draws off from the bottom of separator, after cooling as the admixture producing building material product, described separator is discharged the low cloud of dust pneumatic transmission rich in dioxin and is entered the dore furnace burning of cement kiln, makes dioxin thoroughly decompose；
Optionally, step S35 is also included between described step S30 and step S40；
S35, by coal dust supplementary device to described off-line spurt stove supply coal dust, to improve the temperature that described off-line spurts in stove.
Optionally, the most short residence time t that garbage flying ash spurts in stove at off-line is:
In formula: V is that off-line spurts the dischargeable capacity of stove, enter the spurt horizontal level of stove of off-line from garbage flying ash and calculate, spurt the volume of outlet of still to off-line；
Determine that off-line spurts furnace gas effective time of staying for be more than or equal to 3.0s.Therefore the above-mentioned calculated time of staying should be greater than being equal to 3.0s.
QpSpurt the average operating mode flow of furnace gas for off-line；
K is that gas ash solid and gas is detained ratio.
Optionally, described off-line spurts the average operating mode flow Q of furnace gaspFor:
In formula: QbSpurt furnace gas mark condition flow for off-line；
T is that off-line spurts furnace gas mean temperature；
PdFor local atmospheric pressure；
PlSpurt furnace gas average pressure for off-line.
Optionally, described off-line spurts furnace gas mark condition flow QbFor:
Qb=Qy+Qx+Qs
In formula: QyFor the exhaust gas volumn that coal dust firing produces；
QxSpurt stove inleakage for off-line；
QsFor the hot blast excess gas amount extracted from kiln head cover or tertiary-air pipe.
There is advantages that the method that garbage flying ash place is set to cement raw material provided by the invention is compared with existing wet method (washing) technique, have that flow process is simple, invest feature low, that energy consumption is low, cost of disposal is low, be the important directions of future technical advances.
And the device that garbage flying ash place is set to cement raw material provided by the invention, above-mentioned technical process can be realized, also have that investment is low, energy consumption is low and the feature of saving water resource simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the device that garbage flying ash place is set to cement raw material of the embodiment of the present invention 1；
In figure, labelling is illustrated as: 1-Pneumatic conveying pump；2-carries pipe；4-elevator；5-flying dust storehouse；6-gate；7-flying dust metering device；8-off-line spurts stove；9-separator；10-dore furnace；11-flying dust cooler；12-cement rotary kiln；13-kiln head cover；14-tertiary-air pipe；15-coal dust supplementary device.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, technical scheme is further elaborated.
Embodiment 1
Present embodiments providing a kind of device that garbage flying ash place is set to cement raw material, it includes cement kiln, off-line spurts stove, fly ash carry device and separator.
Described fly ash carry device includes flying dust transmitting device and flying dust metering device；In the present embodiment, by described flying dust transmitting device, described garbage flying ash being delivered to flying dust metering device, be delivered to the flying dust storehouse of flying dust metering device by garbage flying ash, the structure of this flying dust metering device will by being described below.
Described flying dust transmitting device can include Pneumatic conveyer and/or mechanical transmission device；Described Pneumatic conveyer can include Pneumatic conveying pump；Described mechanical transmission device can be bucket elevator etc.；Described Pneumatic conveyer and mechanical transmission device both can arrange simultaneously and use simultaneously, it is also possible to arranges simultaneously and is used alone, it is also possible to is only separately provided a set of Pneumatic conveyer or a set of mechanical transmission device according to practical situation, and only uses a set of induction system.
When the flying dust transmitting device of the present embodiment is realized by Pneumatic conveyer, described Pneumatic conveyer includes Pneumatic conveying pump and conveying pipe；One end of described conveying pipe connects with the air outlet of described Pneumatic conveying pump, and the other end connects with described flying dust storehouse, thus realizing the conveying hoisted by the gas comprising garbage flying ash from lower；When the flying dust transmitting device of the present embodiment is realized by mechanical transmission device, described mechanical transmission device is bucket elevator, the upper end of described bucket elevator is positioned at the surface of the upper opening in described flying dust storehouse, realizes the transmission of the garbage flying ash of solid state thereby through described bucket elevator.
Described flying dust metering device includes flying dust storehouse and metering delivering balance；Described Pneumatic conveyer connects with described flying dust storehouse with the discharge end of mechanical transmission device；The ash hole place in described flying dust storehouse is provided with gate, and described gate can close or open the ash hole in described flying dust storehouse, and the ash hole in described flying dust storehouse is positioned at the surface of described metering delivering balance.
When described garbage flying ash is delivered to flying dust storehouse, when being namely delivered to described flying dust metering device, garbage flying ash is measured by described flying dust metering device, and the garbage flying ash after metering is delivered to described off-line spurts stove, now, described flying dust metering device includes flying dust storehouse and metering delivering balance, the ash hole place in described flying dust storehouse is provided with gate, described gate can close or open the ash hole in described flying dust storehouse, and the ash hole in described flying dust storehouse is positioned at the surface of described metering delivering balance, thus when the ash hole in described flying dust storehouse opened by described gate, garbage flying ash in described flying dust storehouse drop on described metering delivering balance by gravity automatically, and carried by described metering delivering balance；And when the ash hole in flying dust storehouse described in described closing gate, now not by described metering delivering balance conveying garbage flying dust.
In the present embodiment, when garbage flying ash is delivered to off-line spurt stove time, garbage flying ash off-line spurt furnace interior be processed, now the spurt air inlet of stove of described off-line is connected to kiln head cover or the tertiary-air pipe of described cement kiln by blast pipe, send into off-line and spurt the stove thermal source as desorption dioxin extracting hot blast from kiln head cover or tertiary-air pipe, make the dioxin in garbage flying ash separate with fly ash granule, and dioxin is distributed in flue gas.
The spurt air outlet of stove of described off-line is connected with separator by discharge pipe, so that the gas containing fly ash granule and dioxin is delivered to separator, described separator carry out material edema caused by disorder of QI from, fly ash granule after process is drawn off by separator bottom, after cooling as the admixture producing the building material products such as cement, building block, ready-mixed concrete.The low cloud of dust gas (rich in dioxin) that described separator is discharged is sent into the dore furnace of cement kiln and is burned, and makes dioxin thoroughly decompose.
For ensureing that described off-line spurts the temperature of stove, in the present embodiment, the described device that garbage flying ash place is set to cement raw material also includes coal dust supplementary device, described off-line to be spurted stove supplying high temperature gas by described coal dust supplementary device, thus ensureing the temperature that described off-line spurts in stove.
In the present embodiment, fly ash granule in order to described separator is exported effectively cools down, the described device that garbage flying ash place is set to cement raw material also includes flying dust cooler, the charging aperture of described flying dust cooler connects with the bottom deslagging mouth of described separator, and namely its discharging opening exports fly ash granule after cooling.
In the present embodiment, when garbage flying ash is delivered to described off-line spurt stove time, described garbage flying ash can be fed off-line by airlock and spurt stove by described metering delivering balance, and the described off-line stove that spurts is positioned at the kiln tail framework side of cement kiln, described metering delivering balance can be rotor weigher or Coriolis scale, so that garbage flying ash accurately to be measured.
The off-line of the present embodiment stove that spurts has techniques below feature: the spurt furnace type structure of stove of this off-line is simple, has a reducing, can set a reducing in the middle part of it bottom it, and remainder is cylinder.
Fluid (from the hot blast that kiln head cover or tertiary-air pipe extract) is entered off-line spurted in stove by the spurt bottom reducing of stove of off-line.Because reducing area is less, fluid is to spray into off-line with higher speed to spurt in stove.Spurt after in stove when entering off-line outside powder body (garbage flying ash) is spurted stove by off-line, can spurt dispersion along with the thermal current (fluid) spurted at a high speed, and be uniformly distributed in off-line spurt stove furnace space in, contact fully with thermal current and be heated.Dust (garbage flying ash) after being heated continues up along with the off-line gas stream in the stove that spurts, and takes off-line out of spurt outside stove via the spurt outlet of stove of off-line.
The spurt feature of stove combustion system of off-line is
1. enter at a high speed off-line to spurt stove from the hot blast (tertiary air) of cement kiln (kiln head cover or tertiary-air pipe), make garbage flying ash disperse rapidly, be beneficial to the elimination of the organic pollutions such as dioxin；
2. fuel tolerance is strong, and fuel ignition environment is that fuel combustion is abundant in pure high-temperature flue gas；
3. efficiency of combustion is high, up to 93%～99%；
4. load adaptability is good.Load regulation range 40%～100%
The present invention provides a kind of device that garbage flying ash place is set to cement raw material, this device is compared with existing wet method (washing) technique, have that flow process is simple, invest feature low, that energy consumption is low, cost of disposal is low, therefore, the device water that garbage flying ash place is set to cement raw material of the present embodiment is less, save certain water resource, be the important directions of future technical advances.
Embodiment 2
Present embodiments providing a kind of method that garbage flying ash place is set to cement raw material, the method in the present embodiment can adopt the device in such as embodiment 1, and it comprises the following steps:
S10, garbage flying ash is delivered to flying dust metering device by flying dust transmitting device；
S20, by garbage flying ash by, after the metering of described flying dust metering device, being delivered to described off-line and spurt stove；
Spurt S30, described the off-line stove kiln head cover from cement kiln or tertiary-air pipe extract hot blast to off-line and spurt stove；
S40, garbage flying ash after fluidization, are fully contacted heat exchange with described hot blast in off-line spurts stove, make the dioxin in garbage flying ash separate with fly ash granule, and dioxin is distributed in flue gas；
S50, the air containing dioxin and fly ash granule is delivered to separator it is easily separated, fly ash granule draws off from the bottom of separator, after cooling as the admixture producing building material product, described separator is discharged the low cloud of dust pneumatic transmission rich in dioxin and is entered the dore furnace burning of cement kiln, makes dioxin thoroughly decompose.
In the present embodiment, the present embodiment flies method and also includes step S35 between described step S30 and step S40；
S35, by coal dust supplementary device to described off-line spurt stove supply coal dust, to improve the temperature that described off-line spurts in stove.
In the present embodiment, the most short residence time t that garbage flying ash spurts in stove at off-line is:
In formula: V is that off-line spurts the dischargeable capacity of stove, enter the spurt horizontal level of stove of off-line from garbage flying ash and calculate, spurt the volume of outlet of still to off-line；In the present embodiment, the spurt dischargeable capacity of stove of off-line is 51.24m3；
According to dioxin decomposition temperature under the high temperature conditions and the high temperature lower time of staying, destroying rate by fire for what be effectively improved dioxin, when most short residence time t is less than 3s, taking its value is 3s.
QpSpurt the average operating mode flow of furnace gas for off-line；In the present embodiment, the off-line average operating mode flow of furnace gas that spurts is 54.67m3/s；
K is that gas ash solid and gas is detained ratio, namely utilizes the solid material mean residence time of spike material mensuration in simulation off-line spurts stove and the ratio of furnace gas mean residence time.In the present embodiment, gas ash solid and gas is detained ratio is 3.40.
In the present embodiment, described off-line spurts the average operating mode flow Q of furnace gaspFor:
In formula: QbSpurt furnace gas mark condition flow for off-line；In the present embodiment, the off-line furnace gas mark condition flow that spurts is 12.27Nm3/s；
T is that off-line spurts furnace gas mean temperature；In the present embodiment, gas mean temperature is 890 DEG C；
PdFor local atmospheric pressure；In the present embodiment, local atmospheric pressure is 97855Pa；
PlSpurt furnace gas average pressure for off-line.In the present embodiment, the off-line furnace gas average pressure that spurts is-970Pa；
In the present embodiment, described off-line spurts furnace gas mark condition flow QbFor:
Qb=Qy+Qx+Qs=1.65+1.11+9.51=12.27Nm3/s
In formula: QyFor the exhaust gas volumn that coal dust firing produces；1.65Nm3/ s, wherein Nm3/ s is status of criterion flux unit；
QxSpurt stove inleakage for off-line；1.11Nm3/s；Wherein Nm3/ s is status of criterion flux unit；
QsFor the hot blast excess gas amount 9.51Nm extracted from kiln head cover or tertiary-air pipe3/s；Wherein Nm3/ s is status of criterion flux unit；.
It is highly preferred that when its garbage flying ash treating capacity 50t/d (ton day), enter off-line and spurt hot blast temperature 750-890 DEG C of stove, the flow 16000-37000Nm of hot blast3/h；By the coal amount 0.25-0.6t/h that coal dust supplementary device sprays into；Described off-line spurts the air quantity 19500-44000Nm that comes out of the stove of stove3/h；Come out of the stove temperature 870-950 DEG C of wind；The garbage flying ash time of staying in stove is be more than or equal to 3.0s；The efficiency 90-96% of described separator；In flying dust, dioxin destroys rate by fire be more than or equal to 99%.
As its garbage flying ash treating capacity 100t/d, enter off-line and spurt hot blast temperature 750-890 DEG C of stove, the flow 22000-53000Nm of hot blast3/h；By the coal amount 0.45-1.25t/h that coal dust supplementary device sprays into；Described off-line spurts the air quantity 28000-62000Nm that comes out of the stove of stove3/h；Come out of the stove temperature 870-950 DEG C of wind；The garbage flying ash time of staying in stove is be more than or equal to 3.0s；The efficiency 90-96% of described separator；In flying dust, dioxin destroys rate by fire be more than or equal to 99%.
As its garbage flying ash treating capacity 100t/d, enter off-line and spurt hot blast temperature 780-910 DEG C of stove, the flow 22000-53000Nm of hot blast3/h；By the coal amount 0.4-1.15t/h that coal dust supplementary device sprays into；Described off-line spurts the air quantity 28000-58000Nm that comes out of the stove of stove3/h；Come out of the stove temperature 870-950 DEG C of wind；The garbage flying ash time of staying in stove is be more than or equal to 3.0s；The efficiency 90-96% of described separator；In flying dust, dioxin destroys rate by fire be more than or equal to 99%.
As its garbage flying ash treating capacity 200t/d, enter off-line and spurt hot blast temperature 780-910 DEG C of stove, the flow 27000-74000Nm of hot blast3/h；By the coal amount 0.7-2.05t/h that coal dust supplementary device sprays into；Described off-line spurts the air quantity 34000-80000Nm that comes out of the stove of stove3/h；Come out of the stove temperature 870-950 DEG C of wind；The garbage flying ash time of staying in stove is be more than or equal to 3.0s；The efficiency 90-96% of described separator；In flying dust, dioxin destroys rate by fire be more than or equal to 99%.
The sequencing of above example only for ease of describing, does not represent the quality of embodiment.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the device that garbage flying ash place is set to cement raw material, it is characterised in that include cement kiln, off-line spurts stove, fly ash carry device and separator；
Described fly ash carry device, spurts stove for garbage flying ash is delivered to described off-line；
Described off-line spurts stove, by the hot blast drawn from described cement kiln, garbage flying ash is processed, is separated with dioxin by the fly ash granule in garbage flying ash；
The air comprising fly ash granule and dioxin is separated into fly ash granule and the air comprising dioxin by described fly ash carry device, and fly ash granule is exported from the ash releasing tube of described separator, the described air comprising dioxin is exported to described cement kiln from the exhaust duct of described separator；
Dioxin in the air comprising dioxin is carried out high temperature incineration by described cement kiln.
2. the device that garbage flying ash place is set to cement raw material according to claim 1, it is characterised in that described fly ash carry device includes flying dust transmitting device and flying dust metering device；Described flying dust transmitting device includes Pneumatic conveyer and/or mechanical transmission device；Described flying dust metering device includes flying dust storehouse and metering delivering balance；Described Pneumatic conveyer connects with described flying dust storehouse with the discharge end of mechanical transmission device；The ash hole place in described flying dust storehouse is provided with gate, and described gate can close or open the ash hole in described flying dust storehouse, and the ash hole in described flying dust storehouse is positioned at the surface of described metering delivering balance.
3. the device that garbage flying ash place is set to cement raw material according to claim 2, it is characterised in that the spurt air inlet of stove of described off-line is connected to kiln head cover or the tertiary-air pipe of described cement kiln by blast pipe.
4. the device that garbage flying ash place is set to cement raw material according to claim 3, it is characterized in that, the spurt air outlet of stove of described off-line is connected with separator by discharge pipe, so that the gas containing fly ash granule and dioxin is delivered to separator, described separator carry out expecting edema caused by disorder of QI from；Fly ash granule after process is drawn off by separator bottom, after cooling as the admixture producing building material product；The air outlet of described separator connects with the dore furnace of described cement kiln, with discharge it the low cloud of dust pneumatic transmission rich in dioxin enter cement kiln dore furnace burn, make dioxin thoroughly decompose.
5. the method that garbage flying ash place is set to cement raw material, it is characterised in that comprise the following steps:
S10, garbage flying ash is delivered to flying dust metering device by flying dust transmitting device；
S20, by garbage flying ash by, after the metering of described flying dust metering device, being delivered to described off-line and spurt stove；
Spurt S30, described the off-line stove kiln head cover from cement kiln or tertiary-air pipe extract hot blast to off-line and spurt stove；
S40, garbage flying ash after fluidization, are fully contacted heat exchange with described hot blast in off-line spurts stove, make the dioxin in garbage flying ash separate with fly ash granule, and dioxin is distributed in flue gas；
S50, the air containing dioxin and fly ash granule is delivered to separator it is easily separated, fly ash granule draws off from the bottom of separator, after cooling as the admixture producing building material product, described separator is discharged the low cloud of dust pneumatic transmission rich in dioxin and is entered the dore furnace burning of cement kiln, makes dioxin thoroughly decompose.
6. the method that garbage flying ash place is set to cement raw material according to claim 5, it is characterised in that also include step S35 between described step S30 and step S40；
S35, by coal dust supplementary device to described off-line spurt stove supply coal dust, to improve the temperature that described off-line spurts in stove.
7. the method that garbage flying ash place is set to cement raw material according to claim 6, it is characterised in that the most short residence time t that garbage flying ash spurts in stove at off-line is:
In formula: V is that off-line spurts the dischargeable capacity of stove, enter the spurt horizontal level of stove of off-line from garbage flying ash and calculate, spurt the volume of outlet of still to off-line；
QpSpurt the average operating mode flow of furnace gas for off-line；
K is that gas ash solid and gas is detained ratio.
8. the method that garbage flying ash place is set to cement raw material according to claim 7, it is characterised in that described off-line spurts the average operating mode flow Q of furnace gaspFor:
In formula: QbSpurt furnace gas mark condition flow for off-line；
T is that off-line spurts furnace gas mean temperature；
PdFor local atmospheric pressure；
PlSpurt furnace gas average pressure for off-line.
9. the method that garbage flying ash place is set to cement raw material according to claim 8, it is characterised in that described off-line spurts furnace gas mark condition flow QbFor:
Qb=Qy+Qx+Qs
In formula: QyFor the exhaust gas volumn that coal dust firing produces；
QxSpurt stove inleakage for off-line；
QsFor the hot blast excess gas amount extracted from kiln head cover or tertiary-air pipe.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678831A (en) * | 2016-12-30 | 2017-05-17 | 安徽海螺川崎工程有限公司 | Cement kiln fly ash coprocessing system and processing process of cement kiln fly ash coprocessing system |
| CN111442651A (en) * | 2020-04-03 | 2020-07-24 | 北京四方联新技术开发有限公司 | Fly ash dioxin removing system and method based on cement kiln |
| CN112624639A (en) * | 2020-12-22 | 2021-04-09 | 临沂中联水泥有限公司 | Method for producing cement by treating dangerous waste through kiln head burner |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058615A (en) * | 2014-07-02 | 2014-09-24 | 南京凯盛国际工程有限公司 | System for synergistically treating household garbage through cement kiln |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058615A (en) * | 2014-07-02 | 2014-09-24 | 南京凯盛国际工程有限公司 | System for synergistically treating household garbage through cement kiln |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678831A (en) * | 2016-12-30 | 2017-05-17 | 安徽海螺川崎工程有限公司 | Cement kiln fly ash coprocessing system and processing process of cement kiln fly ash coprocessing system |
| CN111442651A (en) * | 2020-04-03 | 2020-07-24 | 北京四方联新技术开发有限公司 | Fly ash dioxin removing system and method based on cement kiln |
| CN112624639A (en) * | 2020-12-22 | 2021-04-09 | 临沂中联水泥有限公司 | Method for producing cement by treating dangerous waste through kiln head burner |
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| CN105731840B (en) | 2018-07-17 |
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