CN101773924B - Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent - Google Patents
Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent Download PDFInfo
- Publication number
- CN101773924B CN101773924B CN201010104161.7A CN201010104161A CN101773924B CN 101773924 B CN101773924 B CN 101773924B CN 201010104161 A CN201010104161 A CN 201010104161A CN 101773924 B CN101773924 B CN 101773924B
- Authority
- CN
- China
- Prior art keywords
- liquid
- ash
- kiln
- washing
- cement kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004568 cement Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004056 waste incineration Methods 0.000 title abstract description 5
- 238000007781 pre-processing Methods 0.000 title abstract 2
- 239000002910 solid waste Substances 0.000 title abstract 2
- 238000005406 washing Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 32
- 238000001354 calcination Methods 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 11
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 10
- 238000004062 sedimentation Methods 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 28
- 230000018044 dehydration Effects 0.000 claims description 18
- 238000006297 dehydration reaction Methods 0.000 claims description 18
- 239000010881 fly ash Substances 0.000 claims description 17
- 238000001556 precipitation Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 14
- 239000002956 ash Substances 0.000 claims description 13
- 239000010813 municipal solid waste Substances 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 239000006210 lotion Substances 0.000 claims description 8
- 238000006298 dechlorination reaction Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 210000002966 serum Anatomy 0.000 claims description 6
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 150000004659 dithiocarbamates Chemical class 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000002351 wastewater Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000013522 chelant Substances 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 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 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000009270 solid waste treatment Methods 0.000 abstract description 2
- 230000000382 dechlorinating effect Effects 0.000 abstract 2
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 239000000470 constituent Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000002738 chelating agent Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 239000006228 supernatant Substances 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000002920 hazardous waste Substances 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000005445 natural material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 231100000770 Toxic Equivalency Factor Toxicity 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004380 ashing Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a cooperatively preprocessing method of a solid waste incineration flying ash cement kiln of a returned effluent in the technical field of solid waste treatment and disposition. The method comprises four stages of flying ash washing and dechlorinating, washings processing, washed ash dehydrating and calcining in the kiln, wherein, at the stage of flying ash washing and dechlorinating, heavy metals washed out in the washing process are chelated, flocculated and settled, then is filtered and pressed together with the washed ash, and then is put into the kiln. Neutralization and heavy metal sedimentation are carried out on an eluate so that the washings can be discharged after reaching standards. When used for processing flying ash, the method not only can save the raw materials in the cement industry, but also can effectively fixing heavy metals, completely burn dioxin, safely, economically and fast dispose flying ash and greatly improve the environmental, economic and social benefits. With the method, occupied area, water and investment are saved, the operation is reliable, the washed ash and the washings are processed with stable effect, and no secondary pollutant is caused.
Description
Technical field
The invention belongs to Solid Waste Treatment, disposal technology field, be specifically related to a kind of collaborative pretreated method of domestic garbage incineration flyash cement kiln that liquid is deviate from backflow.
Background technology
Along with the fast development of waste incineration in China, as the inevitable outcome in waste incineration, the output of flying dust is also soaring year by year in recent years.The end of the year 2008, China's burning city domestic garbage treating capacity has 68540t/d, wherein grate furnace and fluidized combustion treating capacity are respectively 43970t/d, 24570t/d, grate furnace flying dust generation is the 3-5% into stove quantity of refuse, CFB fly ash output is the 15-20% into stove rubbish, the day generation 5004.6-7112.5t of flying dust, and annual generation is ten thousand tons of 165-235.Domestic garbage incineration flyash has Leaching of Heavy Metals concentration height and the large dual hazard profile of dioxin toxic equivalent, in many countries, be all listed in and need the special hazardous waste of processing, in the Hazardous Waste List > > of China < < country, the hazardous waste of flying ash is numbered HW18.
The method that external existing making fly-ash from incineration harmless and stabilization are processed mainly comprises solidification and stabilization, wet chemical treatment and high-temperature process three major types.Solidification and stabilization mainly comprises cement solidification, chelating agent stabilisation, compresses the types such as curing; Wet chemical treatment mainly comprises and adding in acid extraction and waste gas and two types of carbonatings; High-temperature process technology mainly comprises two types of sintering curing and melten glassization.Table 1 has provided the problem existing in the more flying ash disposal technology of current application.
The comprehensive comparison of table 1 flying ash treatment technology
The chemical composition of flying ash is similar to the siliceous or calcareous raw material of cement, can Substitute For Partial natural material, also can partly or entirely replace siliceous or calcareous raw material.
Utilize cement kiln synergic processing flying dust, in cement rotary kiln, temperature of charge is up to 1450 ℃, and gas temperature, up to 1750 ℃ of left and right, can thoroughly decompose bioxin, and the product that incineration fly ash cement kiln coexistence is put is cement, does not have waste residue to produce.Heavy metal through calcining and aquation, is effectively fixed in cooperative disposal, has reduced its animal migration and toxicity, has protected environment; A difficult problem of disposing for current flying dust and the environmental hazard bringing, utilize cement kiln calcining to dispose flying dust and can save natural material for cement industry, reducing emission of carbon dioxide, and reduce disposal and the operating cost of flying dust, realize changing waste into resources and innoxious high unity.Because the chlorinity of China's incineration of refuse flyash is high, can cause cement kiln Coating clogging, affect product quality and increase heavy metal volatilization, when disposing, cement kiln calcining need to just can take into account environmental benefit and economic benefit through necessary pretreatment.The invention " method of domestic garbage incineration flyash cement kiln calcining resource " (application number is 200710177811.9) of submitting to before us provides the method for one way of life incineration of refuse flyash cement kiln calcining resource, comprise two stages of the pretreatment of washing-carbonating and cement kiln calcining, higher for pH in water lotion, leaching ability of heavy metal is difficult to characteristic up to standard, in this patent, adopts CO
2neutralization alkalescence precipitation of heavy metals, but in actual applications, utilize kiln tail gas construction large, invest highly, and in actual motion, pH is difficult to control, and heavy metal precipitation effect is unstable.
Summary of the invention
The object of the invention is for adopting CO
2neutralization alkalescence precipitation of heavy metals, but in actual applications, utilize kiln tail gas construction large, invest high, and pH is difficult to control in actual motion, the unsettled deficiency of heavy metal precipitation effect and propose a kind of collaborative pretreated method of domestic garbage incineration flyash cement kiln that liquid is deviate from backflow.Comprise flying dust washing dechlorination, wash grey dehydration, washings processing, enter kiln calcining four-stage, it is characterized in that, particular content is as follows:
(1) flying dust washing dechlorination: first flying dust is added to water mix and blend 5-10 minute, dechlorination, then by mixed serum global transfer to dehydration equipment;
(2) washing ash dehydration: the mixed serum moisture content of washing flying dust surpasses 80wt%, and in water, contain a large amount of chlorine, mixed serum carries out Separation of Solid and Liquid processing through dehydration equipment, with selecting plate compression dehydration or vacuum belt dehydration equipment to reduce the moisture content of washing flying dust with mechanical dehydration method, obtain dewatered cake and deviate from liquid; Dewatered cake is sent into pre-homogenizing storehouse, then enters calcining in kiln; Deviate from liquid and be back to step (1) washing equipment, press with new water proportion control in 10-20wt% reuse; This step object is to dewater to washing ash, reduces water content and chlorinity, and the flying dust overcoming containing excess moisture enters the adverse effect that kiln calcining brings, and meanwhile, too much moisture also, by strengthening the burnup of calcining, increases flying dust cost of disposal;
(3) washings processing: deviating from liquid pH and can surpass 12 after flying dust washing, exceed sewage discharge index, and in water-washing process, in flying dust, heavy metal can part stripping, causes deviating from content of beary metal in liquid to exceed standard; Consider traditional adding phosphoric acid or pass into CO in deviating from liquid simultaneously
2carry out carbonating, in all reaching and the object of pH precipitation of heavy metals, but in cement industry, phosphorus is to maintain the element that cement kiln nominal situation need to be controlled, P equally
2o
5the intensity of grog and setting time are all existed to adverse effect, and for incineration fly ash cement kiln synergic processing, the introducing of phosphorus is improper; And pass into kiln tail gas, use CO
2in and pH restive, and heavy metal precipitation effect is unstable, Practical Project amount is large, builds and drops into high defect, adopts and in deviating from liquid, adds sulfuric acid neutralization, makes pH to 6-9 scope; For guaranteeing the sedimentation effect of heavy metal ion, add successively dithiocarbamate salt derivative heavy metal chelant and flocculant, quiescent setting filters by filtering ponds, detect the discharge index whether water lotion meets < < integrated wastewater discharge standard (GB 8978-1996) > >, if satisfied enter foul water system, otherwise be back to step (1), dehydration equipment dehydration is sent in the heavy metal periodic cleaning of precipitation, obtains filter cake;
(4) cement kiln calcining: dewatered cake is sent into pre-homogenizing storehouse, enters in cement kiln after evenly and calcines with cement raw material proportioning, need not change the working condition of cement kiln, finally generates clinker;
Described deviate from liquid be back to step (1) reuse must not be over five times, because surpass after five times when deviating from liquid reuse, can affect the removal effect of chlorine in flying dust, in washing ash, chlorinity will be raised to more than 3%, therefore deviate from must enter washings processing step after liquid reuse 5 times and process, then qualified discharge.
Dithiocarbamate salt derivative heavy metal chelant addition in described step 3 is 0.8-2wt% flying dust quality, and the addition of polyacrylamide flocculant to maintain concentration be 0.1-2ppm, can guarantee to process heavy metal concentration in rear supernatant and meet the primary standard in < < integrated wastewater discharge standard (GB 8978-1996) > >, can directly enter foul water system, if not up to standard, be back to supernatant treatment process and process again; For the heavy metal precipitation producing through chelating, flocculation periodic cleaning deliver to dehydration facility and dewater.
The moisture content of described dewatered cake is 25～45wt%.
In described washing flying dust, chlorinty is down to below 2wt%.
The addition content of described dewatered cake and cement raw material proportioning is below 5wt%.
Advantage of the present invention: 1, water lotion neutralizes with sulfuric acid, washes out heavy metal by chelating agent and flocculant precipitation, can guarantee water lotion qualified discharge, the secondary pollution that can effectively avoid pretreating process to produce.2, according to pending flying dust character, by preliminary experiment, determine chelating agent and flocculant addition, in Practical Project, neutralization, chelating, flocculation, precipitation process process are carried out in a facility, by control flow interval time, can effectively save occupation of land.3, remove filtrate and be back to washing facility circulating and recovering 5 times, the stylish water proportion control of circulating and recovering is at 10%-20%, using water wisely greatly.4, this techniqueflow is saved and is taken up an area, and investment is saved in using water wisely, reliable, washing ash and washings processing effect stability.
Accompanying drawing explanation
Fig. 1 is the pretreatment process figure of fly ash of domestic refuse incineration through cooperative disposal of cement kilns.
The specific embodiment
The present invention proposes a kind of collaborative pretreated method of domestic garbage incineration flyash cement kiln that liquid is deviate from backflow.Below in conjunction with Fig. 1 and embodiment, the present invention will be described.
The process equipment that the inventive method adopts can be divided into four processing units: washing unit, dewatering unit, washings processing unit and cement kiln calcining unit.Equipment and the technical process of each unit are respectively described below: the collaborative pretreatment process figure of domestic garbage incineration flyash cement kiln of the liquid that refluxes as shown in Figure 1.
(1) washing unit: this unit main body is water scrubber.
By water and from the flying ash of flying dust storage tank according to weight ratio 15: 1, in water scrubber, mix, fully stir after 5～10 minutes, without standing directly by mixed serum global transfer to dewaterer.
In this unit, water is except running water, and what also receive that dewatering unit produces deviates from liquid and water lotion that can not qualified discharge, to realize recycling of water.
(2) dewatering unit: this unit main body is dewaterer
Adopt plate and frame filter press or vacuum belt press filter to carry out press filtration to reduce moisture content to washing flying dust and heavy metal precipitation, deviate from liquid and be back to washing unit or washings processing unit, and filter cake enters cement kiln calcining unit.
(3) washings processing unit: this unit main body is neutralization reaction pond and filtering ponds.
Water lotion is transferred to neutralization reaction pond, and the industrial sulphuric acid that coutroi velocity is 20% by diluted concentration slowly adds neutralization reaction pond, monitors in real time pH, and supernatant pH is maintained between 6-9.After pH is up to standard, according to heavy metal concentration testing result in water lotion, add and be equivalent to the DTC class chelating agent (dithiocarbamate salt derivative) of flying dust quality 0.8-2% and rapid stirring is removed heavy metal in solution for 5 minutes, then add appropriate flocculant polyacrylamide low rate mixing 5-10 minute, accelerate heavy metal in precipitation solution, then mixed liquor is transferred to filtering ponds, filtering-depositing, if detect supernatant, can meet the primary standard in < < integrated wastewater discharge standard (GB 8978-1996) > >, be disposed to urban sewage discharge system, otherwise be back to water scrubber.Dehydration equipment dehydration is sent in the periodic cleaning of filtering ponds precipitation.
(4) cement kiln calcining unit: this unit main body is cement kiln
Dewatered cake drops into cement kiln calcining as one of raw material of cement after pre-homogenizing storehouse mixes with cement raw material raw material, and the addition content of dewatered cake and cement raw material proportioning is below 5wt%, and operating condition is with normally the condition of production is consistent.
Utilize cement kiln synergic processing flying dust, in cement rotary kiln, temperature of charge is up to 1450 ℃, and gas temperature, up to 1750 ℃ of left and right, can thoroughly decompose bioxin, and the product that incineration fly ash cement kiln coexistence is put is cement, does not have waste residue to produce.Heavy metal through calcining and aquation, is effectively fixed in cooperative disposal, has reduced its animal migration and toxicity.
Embodiment
The flying ash of certain Municipal Solid Waste Incineration Plant, its water content is 1.67wt%, Cl constituent content is 19.66wt%, Zn constituent content is 0.48wt%, and Pb constituent content is 0.19wt%, and Sn constituent content is 0.16wt%, Cu constituent content is 0.10wt%, and Cr constituent content is 0.10wt%.
By water and flying ash according to water: the weight ratio of ash=15: 1 is mixed in washing equipment, stir 10 minutes, global transfer is to vacuum belt press filter, and press filtration cake moisture is reduced to 20.2wt%, chlorinty is reduced to 1.03wt%, after can mixing with raw material, directly enters kiln calcining.
Pressing filtering liquid is back to water scrubber reuse, after reuse 5 times, imports neutralization reaction pond, and slowly adding concentration is the industrial sulphuric acid of 20wt%, and limit edged stirs, and pH meter is monitored in real time and controlled sulfuric acid dripping quantity.PH reaches after 6-9, starts to add the DTC chelating agent stoste that is equivalent to flying dust quality 1wt%, limit edged rapid stirring, after stirring 15 minutes, start to add the polyacrylamide of 0.2ppm, and mixing speed is reduced, then low rate mixing is transferred to filter after 5 minutes static half an hour.
Washing flying dust its chlorinity after vacuum belt press filtration is down to 1wt% left and right by 19.66wt%, deviate from liquid heavy metal concentration after acidifying, chelating, flocculation sediment and reduce to respectively Zn:101.0ppb, Pb:73.2ppb, Sn:0.9ppb, Cu:40.5ppb, Cr:138ppb, content of beary metal and pH value all can reach sewage comprehensive discharge primary standard.After washing flying dust and the dehydration of heavy metal precipitation thing, with 2% addition content, enter cement kiln calcining, due to dewatered cake, other raw material dosage is very low relatively, manufacture of cement operating mode and cement product quality are unaffected, and fly-ash heavy metal is well fixed, and in flying dust, dioxin is effectively destroyed.
Claims (1)
1. the collaborative pretreated method of domestic garbage incineration flyash cement kiln of liquid is deviate from backflow, comprises flying dust washing dechlorination, washes grey dehydration, washings processing, enters kiln calcining four-stage, wherein, adds sulfuric acid neutralization in deviating from liquid, makes pH to 6-9 scope; For guaranteeing the sedimentation effect of heavy metal ion, add successively dithiocarbamate salt derivative heavy metal chelant and flocculant, quiescent setting filters by filtering ponds, detect the discharge index whether water lotion meets < < integrated wastewater discharge standard (GB8978-1996) > >, if satisfied enter foul water system, otherwise be back to flying dust washing dechlorination, dehydration equipment dehydration is sent in the heavy metal periodic cleaning of precipitation, obtains filter cake; And cement kiln calcining: dewatered cake is sent into pre-homogenizing storehouse, addition content is lower than 5%, enters in cement kiln after evenly and calcines with cement raw material proportioning, need not change the working condition of cement kiln, finally generates clinker; It is characterized in that, particular content is as follows:
Flying dust washing dechlorination: first flying dust is added to water mix and blend 5-10 minute, dechlorination, then by mixed serum global transfer to dehydration equipment; Moisture content is surpassed to 80wt% mixed serum, through dehydration equipment, carry out Separation of Solid and Liquid processing, obtain dewatered cake and deviate from liquid; Dewatered cake is sent into pre-homogenizing storehouse, then enters calcining in kiln; Deviate from liquid and be back to washing equipment, press with new water proportion control in 10-20wt% reuse;
Described deviate from liquid backflow reuse must not be over five times, because surpass after five times when deviating from liquid reuse, can affect the removal effect of chlorine in flying dust, more than chlorinity will be raised to 3wt% in washing ash, therefore deviate from must enter washings processing step after liquid reuse 5 times and process, then qualified discharge; While deviating from liquid reuse by with new water proportion control in 10-20wt% reuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010104161.7A CN101773924B (en) | 2010-01-29 | 2010-01-29 | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010104161.7A CN101773924B (en) | 2010-01-29 | 2010-01-29 | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101773924A CN101773924A (en) | 2010-07-14 |
| CN101773924B true CN101773924B (en) | 2014-04-16 |
Family
ID=42510585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010104161.7A Expired - Fee Related CN101773924B (en) | 2010-01-29 | 2010-01-29 | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101773924B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913785B (en) * | 2010-07-19 | 2013-08-07 | 郑慧 | Incineration fly ash cement kiln synergic processing process |
| CN102173611B (en) * | 2011-02-24 | 2013-04-03 | 郑慧 | Process and device for pretreating incineration fly ash |
| CN104028528A (en) * | 2013-03-04 | 2014-09-10 | 上海科锐驰化工装备技术有限公司 | Solidification apparatus for fly ash produced in power generation through burning of municipal waste |
| CN103421957A (en) * | 2013-08-22 | 2013-12-04 | 中冶赛迪工程技术股份有限公司 | Rotary hearth furnace raw material water-washing dechlorination system and water-washing dechlorination technology thereof |
| CN104084415A (en) * | 2014-07-02 | 2014-10-08 | 天津壹鸣环境工程有限公司 | Technology for reducing waste incineration fly ash via water logging pretreatment |
| CN104529011B (en) * | 2015-01-05 | 2016-08-24 | 北京建筑材料科学研究总院有限公司 | Incineration of refuse flyash water lotion goes hardness to drop pH value apparatus and method |
| CN106479509A (en) * | 2016-08-29 | 2017-03-08 | 山东胜伟园林科技有限公司 | Using flying dust and cement, pureed deposit is converted into the method being applied to alkaline land improving soil |
| US9744393B1 (en) | 2016-12-18 | 2017-08-29 | Guangdong Decheng Environmental Sci-Tech Co., Ltd. | Method of removing toxins from fly ash |
| CN108117286B (en) * | 2018-02-05 | 2023-09-26 | 北京中科国润环保科技有限公司 | Washing and desalting system and method for waste incineration fly ash or kiln ash |
| CN108706802B (en) * | 2018-04-25 | 2021-06-08 | 中广核研究院有限公司 | Treatment method and treatment system for pollutants generated by household garbage incineration |
| CN111018376A (en) * | 2019-11-20 | 2020-04-17 | 浙江工业大学 | Household garbage incineration fly ash washing dechlorinating device and tail water discharging method |
| CN111732353B (en) * | 2020-07-17 | 2022-04-12 | 长沙紫宸科技开发有限公司 | Method for treating sand-based waste incineration fly ash by using cement kiln in cooperation |
| CN111807731B (en) * | 2020-07-24 | 2022-08-30 | 长沙紫宸科技开发有限公司 | Method for cooperatively treating chlor-alkali salt mud in cement kiln |
| CN112207115B (en) * | 2020-09-22 | 2022-04-08 | 武汉科技大学 | Process for cooperatively treating medical waste by utilizing low-temperature pyrolysis dechlorination upgrading coupling cement kiln of hot flue gas |
| CN112222087A (en) * | 2020-10-28 | 2021-01-15 | 浙江大学台州研究院 | Multi-stage countercurrent cleaning device and method for waste incineration fly ash |
| CN113336526B (en) * | 2021-05-25 | 2023-02-10 | 上海大学 | Method for pretreating sintering fly ash by using chromium-containing wastewater in steel industry, chromium-containing fly ash sintering ceramsite and application thereof |
| CN113414215A (en) * | 2021-06-16 | 2021-09-21 | 中国恩菲工程技术有限公司 | Treatment method of incineration fly ash |
| CN115254925A (en) * | 2022-08-05 | 2022-11-01 | 四川伟晟环境保护集团有限公司 | Method for leaching soluble salt from household garbage incineration fly ash |
| CN115634914A (en) * | 2022-10-26 | 2023-01-24 | 渭南德昌环保科技有限公司 | Incineration fly ash disposal method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002316119A (en) * | 2001-04-19 | 2002-10-29 | Fuji Kikai Kk | Method for treating fly ash |
| JP2007130608A (en) * | 2005-11-14 | 2007-05-31 | Hitachi Zosen Corp | Method and apparatus for removing chlorine from fly ash |
| CN101182144A (en) * | 2007-11-21 | 2008-05-21 | 清华大学 | Cement kiln calcining resource method for domestic waste burning fly ash |
| CN101333084A (en) * | 2008-07-29 | 2008-12-31 | 上海大学 | Technological process for preprocessing refuse burning fly-ash to be cement raw materials |
| CN101462835A (en) * | 2008-09-01 | 2009-06-24 | 上海市固体废物处置中心 | Innocent treatment method and apparatus for refuse burning flyash |
-
2010
- 2010-01-29 CN CN201010104161.7A patent/CN101773924B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002316119A (en) * | 2001-04-19 | 2002-10-29 | Fuji Kikai Kk | Method for treating fly ash |
| JP2007130608A (en) * | 2005-11-14 | 2007-05-31 | Hitachi Zosen Corp | Method and apparatus for removing chlorine from fly ash |
| CN101182144A (en) * | 2007-11-21 | 2008-05-21 | 清华大学 | Cement kiln calcining resource method for domestic waste burning fly ash |
| CN101333084A (en) * | 2008-07-29 | 2008-12-31 | 上海大学 | Technological process for preprocessing refuse burning fly-ash to be cement raw materials |
| CN101462835A (en) * | 2008-09-01 | 2009-06-24 | 上海市固体废物处置中心 | Innocent treatment method and apparatus for refuse burning flyash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101773924A (en) | 2010-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101773924B (en) | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent | |
| CN101758061A (en) | Method for pretreating fly ash of domestic refuse incineration through cooperative disposal of cement kilns | |
| CN101913785B (en) | Incineration fly ash cement kiln synergic processing process | |
| CN109396163B (en) | Garbage fly ash treatment process for improving chloride ion dissolution rate | |
| CN101462835B (en) | Innocent treatment method and apparatus for refuse burning flyash | |
| CN101817650B (en) | Method for treating incinerated fly ash of domestic garbage with cooperation of cement kiln | |
| CN111100719B (en) | Preparation method of water-washed fly ash derived fuel | |
| CN101182144A (en) | Cement kiln calcining resource method for domestic waste burning fly ash | |
| CN109455738B (en) | Process for preparing high-quality industrial salt by utilizing garbage fly ash | |
| CN102811967A (en) | Treatment method and treatment device for converting chlorine-containing waste into raw material for cement | |
| CN109575880B (en) | Method for preparing I-type snow melting agent by utilizing garbage fly ash | |
| CN112474707A (en) | Efficient single-stage washing method and harmless treatment process for fly ash | |
| CN112551792A (en) | Fly ash washing wastewater and wet deacidification wastewater co-treatment method | |
| KR20120117885A (en) | Washing method and washing system for incineration ash and dust in combustion gas extracted from cement kiln | |
| CN109647850A (en) | The processing system of collaboration processing incineration of refuse flyash and garbage leachate | |
| CN108726727A (en) | Treatment method of cold rolling acid wastewater and application of sintered semi-dry desulfurization ash | |
| CN110950520A (en) | Multiphase solid waste treatment method | |
| CN112661431A (en) | Method for preparing baking-free brick after washing and desalting fly ash | |
| CN109181807A (en) | A kind of preparation method of sewage sludge biomass environment-friendly fuel | |
| CN101603691B (en) | Biomass coal-water slurry prepared by waste leachate and domestic sludge and preparation process thereof | |
| CN103910428A (en) | Comprehensive utilization method of titanium dioxide waste acid | |
| CN112845541A (en) | Fly ash washing and resource comprehensive utilization system | |
| CN105731691A (en) | Coupled stabilizing treatment method for acid wastewater and incineration ash | |
| CN109054750B (en) | Process for preparing snow-melting agent by utilizing garbage fly ash | |
| CN102344213B (en) | Treatment process for calcium hypochlorite secondary mother liquor wastewater and treatment agent thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20180129 |