CN106642152A - Method for harmless disposal and comprehensive utilization by mixed incineration of sludge and garbage fly ash - Google Patents

Method for harmless disposal and comprehensive utilization by mixed incineration of sludge and garbage fly ash Download PDF

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Publication number
CN106642152A
CN106642152A CN201611216135.7A CN201611216135A CN106642152A CN 106642152 A CN106642152 A CN 106642152A CN 201611216135 A CN201611216135 A CN 201611216135A CN 106642152 A CN106642152 A CN 106642152A
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CN
China
Prior art keywords
sludge
flue gas
burning
flying ash
garbage flying
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Pending
Application number
CN201611216135.7A
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Chinese (zh)
Inventor
龚文渠
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Chongqing Wen Channel Environmental Protection Technology Co Ltd
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Chongqing Wen Channel Environmental Protection Technology Co Ltd
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Priority to CN201611216135.7A priority Critical patent/CN106642152A/en
Publication of CN106642152A publication Critical patent/CN106642152A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/442Waste feed arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/70Blending
    • F23G2201/701Blending with additives
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/70Blending
    • F23G2201/702Blending with other waste
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00Furnace arrangements
    • F23G2203/20Rotary drum furnace
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00Specific waste
    • F23G2209/12Sludge, slurries or mixtures of liquids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00Specific waste
    • F23G2209/30Solid combustion residues, e.g. bottom or flyash

Abstract

The invention provides a method for harmless disposal and comprehensive utilization by mixed incineration of sludge and garbage fly ash. The method disposes a uniformly mixed material of sludge and garbage fly ash harmlessly by using sophisticated metallurgical equipment rotary kiln through processes of proportioning, uniform blending, (balling) material distributing, igniting, exhausting, incinerating, residual collecting, flue gas purifying and the like. Residues can be used as lightweight aggregates and building materials for making bricks while harmless disposal is realized, so that harmless synergic disposal by mixed incineration of sludge and garbage fly ash is realized, and purposes of harmlessness, stabilization, reduction and recycling are achieved.

Description

A kind of sludge and garbage flying ash mixed burning harmlessness disposing and the method for comprehensive utilization
Technical field
The invention belongs to fixed-end forces field, specifically, is related to a kind of sludge and garbage flying ash mixed burning is innoxious The method disposed and comprehensively utilize.
Background technology
With the development of Development of China's Urbanization, environmental problem is also increasingly severeer.Quantity of wastewater effluent, application of city life garbage is produced Amount is continuously increased, and the flying dust that the sludge for producing in sewage disposal process therewith and garbage incinerating power plant are produced also is on the increase.
Sludge refers to solid-state of the sewage treatment plant after sewage is processed under residual, semisolid and liquid discarded object, containing big The nutrients such as the organic matter and nitrogen phosphorus of amount, heavy metal and pathogenic bacteria and pathogen etc., and it is frequently accompanied by foul gas.It is dirty at present The process method of disposal of mud has compost treatment, and water body is dissolved, sanitary landfills, burning disposal and Land_use change etc., and these are processed Method produces secondary pollution seriously, all cannot carry out cost-effective harmless treatment and recycling to sludge.
Flying dust refers to the residue obtained by collection in garbage incinerating power plant flue gas purification system, and incineration of refuse flyash contains There is substantial amounts of heavy metal He the poisonous and harmful substance such as bioxin, IARC of the World Health Organization determines bioxin For one-level carcinogenic substance.The method for processing at present has:Solidification landfill, washing stabilization processes, heat treatment, chemical stabilization process, Landfill, bioleaching processing method, electroosmose process etc..Existing treatment technology, all cannot enter pass through to garbage flying ash Help effective harmlessness disposing and recycling.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind and realizes sludge and garbage flying ash mixed burning using burning method The method of harmlessness disposing, i.e., using ripe metallurgical equipment rotary kiln technology harmlessness disposing sludge and garbage flying ash mixing Material, while harmlessness disposing is realized, residue can be used as the construction materials such as aglite, brickmaking.
A kind of sludge and garbage flying ash mixed burning harmlessness disposing and the method for comprehensive utilization, are carried out as follows:
(1) chlorine agent is inhaled with 36~40 parts of sludge for taking moisture content more than 85%, 36~40 parts of garbage flying ash by weight 10~12 parts, 10~16 parts of combustion adjuvant, organic adhesive 1-3 parts;
(2) material for preparing is mixed into batch mixer;
(3) surge bunker will be transported into through the material of mixing;
(4) compound is transported into disc balling machine pelletizing, while adding bonding agent, sending into warmed-up 800 DEG C after screening Rotary kiln, burn, incineration temperature control at >=1000 DEG C, realize sludge and garbage flying ash mixed burning high-temperature detoxification;
(5) residue after burning is collected into stand-by, the flue gas produced during burning exhausting is at flue gas purification system After reason, then by smoke evacuation system qualified discharge.
Above-mentioned flue gas purification system include dual firing chamber, heat exchanger, chilling tower, wet method depickling, blender, sack cleaner, Active carbon adsorber and water treatment system.
Jing after the flue gas of flue gas purification system process reaches discharge standard, heat up through heat exchanger in flue gas smoke evacuation system By smoke stack emission.
Above-mentioned steps (5) are collected stand-by residue and are used as the construction materials such as brickmaking.
Above-mentioned gas cleaning Shi bioxin is removed and adopts secondary charcoal absorption, once before sack cleaner, by literary mound In blender spray into activated carbon powder, remove more than 95% bioxin, it is another time after sack cleaner, add charcoal absorption Device, its reaches more than 99% at bioxin removal efficiency.
Mixed burning feature
With the increasingly increase of city domestic sewage and discharged volume of industrial waste water, city sewage and sludge is increased rapidly and dirt Contradiction between mud disposing capacity and cost of disposal.Meanwhile, city garbage burning flying ash is used as hazardous waste, landfill yard Landfill ability and useful life are restricted, and the process of incineration of refuse flyash disposes equally very thorny.Therefore, low cost is explored Lower two kinds of wastes are jointly processed by disposing and recycling is significant.
1st, the solids in sludge are hydrate, tiny powered, so sludge forms a kind of stable soliquid, The separation of solid and water in sludge is made, that is, is concentrated and is dehydrated all relatively difficult.It is dirty at present during the independent incineration disposal of sludge Mud dehydration cost accounts for entirely processing 50% of cost of disposal or so, and high dehydration cost limits sludge and individually burns innoxious place Put industry development.And incineration of refuse flyash particle fine uniform, moisture content is less than 2%, and contains villaumite, and the composition such as calcium salt is in Alkalescence, using flying dust in rich salt characteristic and gas grandson's structure, change sludge colloform texture, destroy colloidal stability, realize flying dust Conditioning sludge dewatering.After sludge and garbage flying ash mix by a certain percentage, the degree of dehydration and dewatering speed of sludge all obtain compared with Big degree is improved, and, with the increase of flying dust injected volume, the conditioning degree of sludge is improved constantly, so as to can significantly drop Low sludge dewatering cost.
2nd, containing substantial amounts of organic matter and a certain amount of cellulose wood quality in municipal sludge.Burn exactly using in sludge Organic principle is higher, with certain calorific value the features such as carry out disposing sludge.Sludge caloric value about 836KJ/kg after dehydration, sludge and Garbage flying ash mixed burning, it is possible to use the heat that sludge high temperature combustion decomposition is produced provides part and burns energy to flying dust, from And reduce flying dust and burn energy consumption.
3rd, chloride is mainly with the presence of the compound forms such as NaC1, KC1 in flying dust, and these materials are molten to a certain extent Xie Yushui, after the sludge of moisture content 85% mixes with flying dust, by mechanical agitation, dissolved salts and heavy metal is leached to liquid phase In.Residual chloride content is substantially reduced in flying dust after mixed processing, and the leachability such as heavy metal Pb, Zn, Cb weakens.It is mixed with sludge Flying dust after conjunction does not produce chloride during burning disposal later, eliminates corrosivity and the leaching of incineration residue.Will Sludge and garbage flying ash mixed burning, seek to optimal balance point in environmental hazard minimum and maximization of economic benefit, It is real to realize that the lower two kinds of wastes collaboration coexistence of low cost is put and recycling.
The control of bioxin:
Sludge and garbage flying ash temperature >=1000 DEG C during rotary kiln incineration, higher incineration temperature Shi bioxin is thorough Bottom is decomposed, while the suction chlorine agent for adding generates CaCl2, prevents the generation of bioxin, dioxin in flue gas from drastically declining;In addition, Flue gas can recombine a small amount of bioxin after chilling tower chilling, in flue gas, and the system also adopts secondary charcoal absorption, once Before sack cleaner, activated carbon powder is sprayed into by venturi mixer, remove more than 95% bioxin, removed in pocket type for another time After dirt device, active carbon adsorber is added, its reaches more than 99% at bioxin removal efficiency.
The control of heavy metal:
Heavy metal in sludge and garbage flying ash, because incineration temperature reaches more than 1000 DEG C, makes weight in burning process Into liquid phase, liquid phase forms glass melt to melted metal oxide in cooling procedure, and heavy metal no longer produces Leaching, complete Full up foot country heavy metal Leaching is required.
Rotary system adopts negative-pressure operation, flue gas and dust to be easy to collection neutralization and collect, and environmental condition is good, will not produce two Secondary pollution.
Sewage Jing water treatment systems process Posterior circle and use, and the dedusting ash of generation and sewage disposal in production process is produced Sludge returns circulation adapted.
Beneficial effect:
(1) the large and fast speed of social recoverable amount increases sludge and garbage flying ash after the process of rotary kiln technology system, energy Fully achieve sludge and garbage flying ash mixed burning harmlessness disposing;Simultaneously rotary kiln technology is all ripe large-scale production work Skill, can realize the extensive harmlessness disposing of sludge and garbage flying ash.
(2) sludge and rubbish flying dust mixed burning, the dehydration and conditioning for sludge provides reliable condition, while sludge Gao Shui Content is divided to provide approach for effective removal of flying dust chlorine with flying dust coprocessing.The flue gas produced in burning process is after treatment Qualified discharge is fully achieved, there is no secondary pollution.Residue can be used as the construction materials such as brickmaking, it is achieved thereby that sludge and rubbish The innoxious cooperative disposal of flying dust mixed burning and recycling, have reached " innoxious, stabilisation, minimizing, resource " Purpose.
Both are combined together well and are processed by the present invention according to sludge and the own characteristic of garbage flying ash, energy Enough realize the extensive harmlessness disposing of sludge and garbage flying ash.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
Embodiment 1:
As shown in Figure 1:Take the sludge 38t of moisture content more than 85%, garbage flying ash 36t, inhale chlorine agent 10t, combustion adjuvant 14t,; Machine binding agent 2t,
The material for preparing is mixed into batch mixer;
Surge bunker will be entered through the material of mixing and even into disc balling machine pelletizing (while adding organic binder bond); Ball Task-size Controlling is in 6-12mm;
The compound pelletizing made is sent into rotary kiln end Jing after roll screen screening, it is mixed after ignition system fires Close pellet group to burn and move to kiln tail in rotary kiln rotary course in rotary kiln, roasting junction temperature is controlled >=1000 DEG C, realize that sludge and incineration of refuse flyash mix burning high temperature removing toxic substances;Combustion adjuvant when reaching kiln tail in compound pelletizing is Burn completely, compound pelletizing residue is collected in residue storehouse through mucking machine.Residue is sent to Building Materials Factory and makees the Building woods such as brickmaking Material.
Flue gas in burning process enters dual firing chamber under fan action, and (burner fires for temperature >=1100 DEG C of dual firing chamber Material is using natural gas or liquefied gas), the harmful substance such as Shi bioxin is decomposed at high temperature.Then flue gas sequentially pass through heat exchanger, Chilling tower, wet method depickling, blender, sack cleaner, active carbon adsorber, heat exchanger, chimney realize qualified discharge.
The water circulation of wet method depickling is used, when recirculated water failure or exceeded sludge concentration Jing after water treatment system process again Recycle, the dedusting ash that the sludge of generation and sack cleaner are produced returns circular treatment after collecting.
Embodiment 2:
As shown in Figure 1:Take the sludge 36t of moisture content more than 85%, garbage flying ash 40t, inhale chlorine agent 12t, combustion adjuvant 10t, Organic binder bond 2t;
The material for preparing is mixed into batch mixer;
Surge bunker will be entered through the material of mixing and even into disc balling machine pelletizing (while adding organic binder bond); Ball Task-size Controlling is in 6-12mm;
The compound pelletizing made is sent into rotary kiln end Jing after roll screen screening, it is mixed after ignition system fires Close pellet group to burn and move to kiln tail in rotary kiln rotary course in rotary kiln, roasting junction temperature is controlled >=1000 DEG C, realize that sludge and incineration of refuse flyash mix burning high temperature removing toxic substances;Combustion adjuvant when reaching kiln tail in compound pelletizing is Burn completely, compound pelletizing residue is collected in residue storehouse through mucking machine.Residue is sent to Building Materials Factory and makees the Building woods such as brickmaking Material.
Flue gas in burning process enters dual firing chamber under fan action, and (burner fires for temperature >=1100 DEG C of dual firing chamber Material is using natural gas or liquefied gas), the harmful substance such as Shi bioxin is decomposed at high temperature.Then flue gas sequentially pass through heat exchanger, Chilling tower, wet method depickling, blender, sack cleaner, active carbon adsorber, heat exchanger, chimney realize qualified discharge.
The water circulation of wet method depickling is used, when recirculated water failure or exceeded sludge concentration Jing after water treatment system process again Recycle, the dedusting ash that the sludge of generation and sack cleaner are produced returns circular treatment after collecting.
Embodiment 3:
As shown in Figure 1:The sludge 40t of moisture content more than 85%, garbage flying ash 38t are taken, chlorine agent 8t, combustion adjuvant 12t is inhaled, is had Machine binding agent 2t;
The material for preparing is mixed into batch mixer;
Surge bunker will be entered through the material of mixing and even into disc balling machine pelletizing (while adding organic binder bond); Ball Task-size Controlling is in 6-12mm;
The compound pelletizing made is sent into rotary kiln end Jing after roll screen screening, it is mixed after ignition system fires Close pellet group to burn and move to kiln tail in rotary kiln rotary course in rotary kiln, roasting junction temperature is controlled >=1000 DEG C, realize that sludge and incineration of refuse flyash mix burning high temperature removing toxic substances;Combustion adjuvant when reaching kiln tail in compound pelletizing is Burn completely, compound pelletizing residue is collected in residue storehouse through mucking machine.Residue is sent to Building Materials Factory and makees the Building woods such as brickmaking Material.
Flue gas in burning process enters dual firing chamber under fan action, and (burner fires for temperature >=1100 DEG C of dual firing chamber Material is using natural gas or liquefied gas), the harmful substance such as Shi bioxin is decomposed at high temperature.Then flue gas sequentially pass through heat exchanger, Chilling tower, wet method depickling, blender, sack cleaner, active carbon adsorber, heat exchanger, chimney realize qualified discharge.
The water circulation of wet method depickling is used, when recirculated water failure or exceeded sludge concentration Jing after water treatment system process again Recycle, the dedusting ash that the sludge of generation and sack cleaner are produced returns circular treatment after collecting.

Claims (5)

1. a kind of sludge and garbage flying ash mixed burning harmlessness disposing and the method for comprehensive utilization, are carried out as follows:
(1) by weight with taking 36~40 parts of the sludge of moisture content more than 85%, 36~40 parts of garbage flying ash, inhale chlorine agent 10~ 12 parts, 10~16 parts of combustion adjuvant, organic adhesive 1-3 parts;
(2) material for preparing is mixed into batch mixer;
(3) surge bunker will be transported into through the material of mixing;
(4) compound is transported into disc balling machine pelletizing, at the same add bonding agent, send into after screening warmed-up 800 DEG C return Rotary kiln, burning, incineration temperature is controlled at >=1000 DEG C, realizes sludge and garbage flying ash mixed burning high-temperature detoxification;
(5) by after burning residue collect it is stand-by, burn exhausting during produce flue gas through flue gas purification system process after, Pass through smoke evacuation system qualified discharge again.
2. a kind of sludge and garbage flying ash mixed burning harmlessness disposing and the method for comprehensive utilization according to claim 1, It is characterized in that:The flue gas purification system includes dual firing chamber, heat exchanger, chilling tower, wet method depickling, blender, bag-type dusting Device, active carbon adsorber and water treatment system.
3. a kind of sludge and garbage flying ash mixed burning harmlessness disposing and the method for comprehensive utilization according to claim 1, It is characterized in that:Jing after the flue gas of flue gas purification system process reaches discharge standard, through heat exchanger in flue gas smoke evacuation system Jing smoke stack emissions after intensification.
4. a kind of sludge and garbage flying ash mixed burning harmlessness disposing and the method for comprehensive utilization according to claim 1, It is characterized in that:The step (5) is collected stand-by residue and is used as the construction materials such as brickmaking.
5. a kind of method of utilization rotary kiln technology harmlessness disposing garbage flying ash according to claim 2, it is characterised in that: The gas cleaning Shi bioxin is removed and adopts secondary charcoal absorption, once before sack cleaner, by venturi mixer Activated carbon powder is sprayed into, more than 95% bioxin is removed, it is another secondary after sack cleaner, active carbon adsorber is added, it two Evil English removal efficiency reaches more than 99%.
CN201611216135.7A 2016-12-26 2016-12-26 Method for harmless disposal and comprehensive utilization by mixed incineration of sludge and garbage fly ash Pending CN106642152A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110631021A (en) * 2018-06-22 2019-12-31 汤广武 Safe treatment method of fly ash
CN112082164A (en) * 2020-09-11 2020-12-15 中国科学院过程工程研究所 Garbage leachate and incineration fly ash cooperative treatment process
CN113883529A (en) * 2020-07-01 2022-01-04 袁安之 Immediate circulation treatment technology and method for incineration fly ash of industrial kiln incineration waste

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101579682A (en) * 2009-06-04 2009-11-18 浙江理工大学 Mixing disposal method of incineration ash of municipal sludge and domestic garbage
JP2013202593A (en) * 2012-03-29 2013-10-07 Osaka Gas Co Ltd Treatment method and treatment apparatus of incineration ash
CN103551358A (en) * 2013-09-30 2014-02-05 天津壹鸣环境工程有限公司 Garbage burning fly ash sintering harm-eliminating resource-utilization treatment system
CN105716092A (en) * 2016-03-05 2016-06-29 东北石油大学 System treatment method for oil field oily sludge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101579682A (en) * 2009-06-04 2009-11-18 浙江理工大学 Mixing disposal method of incineration ash of municipal sludge and domestic garbage
JP2013202593A (en) * 2012-03-29 2013-10-07 Osaka Gas Co Ltd Treatment method and treatment apparatus of incineration ash
CN103551358A (en) * 2013-09-30 2014-02-05 天津壹鸣环境工程有限公司 Garbage burning fly ash sintering harm-eliminating resource-utilization treatment system
CN105716092A (en) * 2016-03-05 2016-06-29 东北石油大学 System treatment method for oil field oily sludge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110631021A (en) * 2018-06-22 2019-12-31 汤广武 Safe treatment method of fly ash
CN110631021B (en) * 2018-06-22 2021-07-06 汤广武 Safe treatment method of fly ash
CN113883529A (en) * 2020-07-01 2022-01-04 袁安之 Immediate circulation treatment technology and method for incineration fly ash of industrial kiln incineration waste
CN112082164A (en) * 2020-09-11 2020-12-15 中国科学院过程工程研究所 Garbage leachate and incineration fly ash cooperative treatment process

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