CN102259108A - Technology for gelatinizing and solidifying waste incineration fly ash - Google Patents
Technology for gelatinizing and solidifying waste incineration fly ash Download PDFInfo
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- CN102259108A CN102259108A CN2011101473028A CN201110147302A CN102259108A CN 102259108 A CN102259108 A CN 102259108A CN 2011101473028 A CN2011101473028 A CN 2011101473028A CN 201110147302 A CN201110147302 A CN 201110147302A CN 102259108 A CN102259108 A CN 102259108A
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Abstract
The invention discloses a technology for gelatinizing and solidifying waste incineration fly ash, belonging to the field of environmental engineering. The technology for gelatinizing and solidifying comprises the following steps: preparing materials, stirring powder, stirring solid and liquid materials, extruding, prilling, shaping, curing aggregates and the like. After being metered, fly ash and a curing agent are primarily mixed by a shunt valve and are stirred and mixed by a strong blender evenly; a stabilizing agent is dissolved into water to prepare a solvent to ensure that the stabilizing agent is evenly mixed with the mixed material, thereby accelerating heavy metals to be fully trapped, and guaranteeing the stabilized effect of heavy metals in the fly ash; the stabilizing agent liquid is added into the strong stirrer by an atomizer to effectively control the mixing amount of the stabilizing agent liquid; the mixed material and the stabilizing agent liquid are accelerated to be fully mixed to react; and the processed fly ash heavy metal leaching concentration satisfies the requirements of the living landfill space of refuse and can be filled in a landfill space of refuse, and the fly ash processing cost is lowered.
Description
Technical field
The invention discloses a kind of gelling consolidation technique of incineration of refuse flyash, belong to field of environment engineering.
Background technology
The economic develop rapidly of China, component of refuse are complicated day by day, and land resource is unprecedentedly nervous, and waste reduction disposal urgency is very strong.The rise of a large amount of garbage incinerating power plants is that enormous function has been brought into play in the garbage disposal and the utilization of resources, but meanwhile, waste incineration has produced a large amount of flying dusts, and the heavy metal and the compound thereof that particularly are rich in flying dust have brought serious threat for town dweller's health and ecological environment security.In the incineration of refuse flyash enrichment high concentration and the heavy metal that easily leaches, be regarded as danger wastes, should enter the danger wastes landfill yard handles, yet, the most of area of China is limited by land resource and regional development, and the supporting enforcement of danger wastes landfill disposal is difficult to satisfy the huge incineration of refuse flyash landfill of quantity.For this reason, according to the regulation of GB16889-2008 " incineration of refuse flyash is treated reach after the requirement of house refuse sanitary filling field can at the landfill of sanitary filling field ", at present, incineration of refuse flyash adopts the method for disposal of solidifying the back sanitary landfills mostly.
Present stage, the incineration of refuse flyash of China is disposed Binder Materials and the inorganic chemistry medicaments such as cement, lime of adopting more, and along with updating of material, organic polymer stabilizing agents such as heavy metal chelant progressively enter the incineration of refuse flyash treatment process.And the flying dust disposing technique that most garbage incinerating power plant adopts is very coarse simple, and particularly whipping process and forming process otherness are bigger, thereby causes in the flying dust activity stabilizedization of heavy metal effect circumstances totally different.The proportioning of flying dust, curing agent, stabilizing agent and water exists water more than needed to overflow, and the flying dust block of moulding easily splits or less stable, causes serious secondary pollution, and fly-ash heavy metal stabilisation quality and weatherability after causing handling are relatively poor.According to experimental examination, present stage is used 40% cement mixing content, and the flying dust increase-volume is strengthened, and wherein 40%～60%, the waste of material that causes because of inappropriate technology.
Heavy metal mainly is divided into and is adsorbed in dust granules surface and parcel and the dust granules in the incineration of refuse flyash, realize the stabilization processes of heavy metal, must strengthen the cementation of Binder Materials, stabilizing agent and flying dust, therefore, the technology of flying dust gelling curing is directly connected to final treatment effect and processing cost.
Summary of the invention
At above-mentioned existing problems, the object of the present invention is to provide a kind of gelling consolidation technique of incineration of refuse flyash, processing has whole process and does not have that water more than needed overflows, advantages such as heavy metal stabilization is effective, non-secondary pollution this flying dust gelling consolidation technique at the incineration of refuse flyash safety and stability, to achieve these goals, its technical solution is:
A kind of gelling consolidation technique of incineration of refuse flyash, according to following steps,
A) material is standby
The slow storage of flying dust input flying dust storage warehouse (1), after first motor-operated control valve (4) blanking is standby to flying dust measuring tank (7), the slow storage of curing agent input curing agent storage warehouse (2), after second motor-operated control valve (5) blanking is standby to curing agent measuring tank (8), stabilizing agent and water enter the slow storage in stabilizing agent reserves storehouse (3) according to 1: 30～100 and stir, make the stabilizing agent solvent, the stabilizing agent solvent is standby to stabilizing agent measuring tank (9) through first high pressure control valve (6) blanking again;
B) powder stirs
Flying dust in the flying dust measuring tank (7) through the curing agent of the 3rd motor-operated control valve (10) and curing agent measuring tank (8) through the 4th motor-operated control valve (11), according to quality than flying dust: curing agent=10: 1～3 enter machine,massing (14) synchronously after flow divider (13) stirs carries out siccative and mixes and stirred 5～10 minutes, makes mixed powder;
C) solid-liquid stirs
Stabilizing agent solvent in the stabilizing agent measuring tank (9) enters in the machine,massing (14) by flow divider (13) through second high pressure control valve (12) and mixes stirring with mixed powder, the stirring reaction time is 15～30 minutes, make the fixed material of gelling, wherein, the mass ratio of mixed powder and stabilizing agent solvent is 110～130: 0.2～1;
D) extruder grain moulding
Entering comminutor (16) extrusion modling through the fixed material of gelling behind machine,massing (14) mix is pellet;
E) pellet maintenance
With the maintenance 3～7 days in 25～30 ℃, shady and cool, the environment that ventilates of moulding pellet.
The stabilizing agent solvent adopts atomizer to spray and enters machine,massing (14).
Described curing agent is the mixing of one or more Binder Materials in cement, HAS, the lime.
Described stabilizing agent is a kind of in amino strong basicity heavy metal chelate resin or heavy metal chelate resin or the amino-sulfonic group heavy metal chelate resin.
Owing to adopted above technical scheme, the gelling consolidation technique of a kind of incineration of refuse flyash of the present invention, flying dust is realized tentatively mixing by flow divider with curing agent after metering, mix 5～10 minutes through machine,massing again, thereby having realized that flying dust mixes with the curing agent secondary promotes the two to mix; Make solvent after stabilizing agent incorporated water, can guarantee that stabilizing agent and mixed material mix, thereby promote that heavy metals trapping is more abundant, both guaranteed the stabilization effect of heavy metal in the flying dust; The stabilizing agent liquor adopts the mode in the atomizer adding machine,massing, can effectively control the incorporation of stabilizing agent liquor, promote mixed material and the abundant hybrid reaction of stabilizing agent liquor, impel the fixed material of gelling to contain to respond the required water yield and do not have more surplus water and overflow; Adopt comminutor prestressing force to push abundant mixed flying dust, can reduce space and the adhesion that promotes heavy metal and stabilizing agent and curing agent between fly ash granule; Pellet is placed 25～30 ℃, shady and cool, the environment maintenance of ventilating 3～7 days, thereby promote pellet strength to increase and the mineralising sufficient reacting.Fly-ash heavy metal after the processing leaches the requirement that concentration satisfies the house refuse sanitary filling field, can enter the sanitary filling field landfill, has reduced the flying dust processing cost.
Description of drawings:
Accompanying drawing is the flow chart of the gelling consolidation technique of a kind of incineration of refuse flyash of the present invention.
The specific embodiment
See accompanying drawing, a kind of gelling consolidation technique of incineration of refuse flyash, gelling consolidation technique be according to following steps,
A) material is standby
The 1 slow storage of flying dust input flying dust storage warehouse, after 4 blankings of first motor-operated control valve are standby to flying dust measuring tank 7, the 2 slow storages of curing agent input curing agent storage warehouse, after 5 blankings of second motor-operated control valve are standby to curing agent measuring tank 8, stabilizing agent and water enter the 3 slow storages of stabilizing agent reserves storehouse according to 1: 30～100 and stir, make the stabilizing agent solvent, the stabilizing agent solvent is standby to stabilizing agent measuring tank 9 through 6 blankings of first high pressure control valve again; Described curing agent is the mixing of one or more Binder Materials in cement, HAS, the lime; Described stabilizing agent is a kind of in amino strong basicity heavy metal chelate resin or heavy metal chelate resin or the amino-sulfonic group heavy metal chelate resin.
B) powder stirs
Flying dust in the flying dust measuring tank 7 through the curing agent of the 3rd motor-operated control valve 10 and curing agent measuring tank 8 through the 4th motor-operated control valve 11, according to quality than flying dust: curing agent=10: 1～3 enter machine,massing 14 synchronously after flow divider 13 stirs carries out siccative and mixes and stirred 5～10 minutes, makes mixed powder; Radar charge level control device on the measuring tank feeds back to PLC control system 15 with material information, PLC control system 15 is according to material proportion of setting and control parameter, the motor-operated control valve or the high pressure control valve open and close of indicating gage measuring tank top are regulated and are proofreaied and correct material proportion.
C) solid-liquid stirs
Stabilizing agent solvent in the stabilizing agent measuring tank 9 enters in the machine,massing 14 by flow divider 13 through second high pressure control valve 12 and mixes stirring with mixed powder, the stirring reaction time is 15～30 minutes, make the fixed material of gelling, wherein, the mass ratio of mixed powder and stabilizing agent solvent is 110～130: 0.2～1; The stabilizing agent solvent adopts atomizer to spray and enters machine,massing 14.
D) extruder grain moulding
Entering comminutor 16 extrusion modlings through the fixed material of gelling behind machine,massing 14 mixs is pellet.
E) should be before the pellet landfill maintenance in 25～30 ℃ and shady and cool, the draughty environment 3～7 days.
F) pellet is delivered to haulage truck or the slow storage container of pellet through the conveying equipment 17 of sealing, and the conveying equipment 17 of sealing is provided with air-blast device, the mummification of air blast quickening pellet loss of water.
Flying dust storage warehouse 1, curing agent storage warehouse 2, stabilizing agent storage warehouse 3, flying dust measuring tank 7, curing agent measuring tank 8, stabilizing agent measuring tank 9 all are provided with radar charge level control device and display unit, and are provided with and control by 15 centralized management of PLC console.The radar charge level control device can feed back the material level of material in real time, and information passed to PLC control system 15, indicate the open and close of motor-operated control valve, high pressure control valve and motor by PLC control system 15 according to setting working procedure, thereby realize the automation control of this technology and the material metering function of measuring tank.
Case study on implementation
Be described in further detail below in conjunction with relevant case study on implementation:
The content of beary metal of flying dust former state sees Table 1.
Table 1 flying dust former state heavy metal leaching test result
Case study on implementation 1
In PLC console input parameter of materials, by radar charge level control device and PLC console indication motor-operated control valve metering flying dust 300kg, cement 45kg.Flying dust and cement all after the preliminary mixing of flow divider, enter machine,massing and stir 5min.All place stabilizing agent storage warehouse and mix evenly to make the stabilizing agent solvent amino strong basicity heavy metal chelate resin 0.6kg and 90kg water; again whole stabilizing agent solvents are all added machine,massing by atomizer and stir 25min; flying dust behind the last mix is through the comminutor extrusion modling; small particle diameters is 10mm～30mm; fly ash granule after the moulding was deposited in the shady and cool dry fog room maintenance 3～7 days, randomly draw pellet and detect its heavy metal according to the program among " solid waste leaches toxicity leaching method inversion method " GB 5086.1-1997 and leach concentration.After testing, heavy metal leaches concentration Pb＜0.2mg/kg, Cu＜0.5mg/kg, Cr＜2mg/kg, Ni＜0.5mg/kg, Cd＜0.1mg/kg in the flying dust.
Case study on implementation 2
In PLC console input parameter of materials, by radar charge level control device and PLC console indication motor-operated control valve metering flying dust 100kg, HAS curing agent 20kg.Flying dust and HAS curing agent all after the preliminary mixing of flow divider, enter machine,massing and stir 5min.All place stabilizing agent storage warehouse and mix evenly to make the stabilizing agent solvent heavy metal chelate resin 0.5kg and 30kg water; again the stabilizing agent solvent is all added machine,massing by atomizer and stir 25min; flying dust behind the last mix is through the comminutor extrusion modling; small particle diameters is 10mm～30mm; fly ash granule after the moulding put deposited in the shady and cool dry fog room maintenance 3～7 days, randomly draw granule according to " solid waste leaches toxicity leaching method inversion method " GB 5086.1-1997 and in program detect its heavy metal and leach concentration.After testing, heavy metal leaches concentration Pb＜0.15mg/kg, Cu＜0.45mg/kg, Cr＜1.5mg/kg, Ni＜0.35mg/kg, Cd＜0.1mg/kg in the flying dust.
Case study on implementation 3
In PLC console input parameter of materials, by radar charge level control device and PLC console indication motor-operated control valve metering flying dust 300kg, cement-lime compound 30kg.Flying dust and cement-lime compound all after the preliminary mixing of flow divider, enter machine,massing and stir 5min.Amino-sulfonic group heavy metal chelate resin 1.5kg and 90kg water all place stabilizing agent storage warehouse and mix evenly to make the stabilizing agent solvent; again the stabilizing agent solvent is all added machine,massing by atomizer and stir 25min; flying dust behind the last mix is through the comminutor extrusion modling; small particle diameters is 10mm～30mm; fly ash granule after the moulding was deposited in the shady and cool dry fog room maintenance 3～7 days, randomly draw granule and detect its heavy metal according to the program among " solid waste leaches toxicity leaching method inversion method " GB 5086.1-1997 and leach concentration.After testing, heavy metal leaches concentration Pb＜0.19mg/kg, Cu＜0.40mg/kg, Cr＜1.05mg/kg, Ni＜0.35mg/kg, Cd＜0.12mg/kg in the flying dust.
Claims (4)
1. the gelling consolidation technique of an incineration of refuse flyash is characterized in that: the gelling consolidation technique of described flying dust is according to following steps,
A) material is standby
The slow storage of flying dust input flying dust storage warehouse (1), after first motor-operated control valve (4) blanking is standby to flying dust measuring tank (7), the slow storage of curing agent input curing agent storage warehouse (2), after second motor-operated control valve (5) blanking is standby to curing agent measuring tank (8), stabilizing agent and water enter the slow storage in stabilizing agent reserves storehouse (3) according to 1: 30～100 and stir, make the stabilizing agent solvent, the stabilizing agent solvent is standby to stabilizing agent measuring tank (9) through first high pressure control valve (6) blanking again;
B) powder stirs
Flying dust in the flying dust measuring tank (7) through the curing agent of the 3rd motor-operated control valve (10) and curing agent measuring tank (8) through the 4th motor-operated control valve (11), according to quality than flying dust: curing agent=10: 1～3 enter machine,massing (14) synchronously after flow divider (13) stirs carries out siccative and mixes and stirred 5～10 minutes, makes mixed powder;
C) solid-liquid stirs
Stabilizing agent solvent in the stabilizing agent measuring tank (9) enters in the machine,massing (14) by flow divider (13) through second high pressure control valve (12) and mixes stirring with mixed powder, the stirring reaction time is 15～30 minutes, make the fixed material of gelling, wherein, the mass ratio of mixed powder and stabilizing agent solvent is 110～130: 0.2～1;
D) extruder grain moulding
Entering comminutor (16) extrusion modling through the fixed material of gelling behind machine,massing (14) mix is pellet;
E) pellet maintenance
With the maintenance 3～7 days in 25～30 ℃, shady and cool, the environment that ventilates of moulding pellet.
2. as the gelling consolidation technique of claims 1 described a kind of incineration of refuse flyash, it is characterized in that: the stabilizing agent solvent adopts atomizer to spray and enters machine,massing (14).
3. as the gelling consolidation technique of claims 1 described a kind of incineration of refuse flyash, it is characterized in that: described curing agent is one or more the mixing in cement, HAS, the lime.
4. as the gelling consolidation technique of claims 1 described a kind of incineration of refuse flyash, it is characterized in that: described stabilizing agent is a kind of in amino strong basicity heavy metal chelate resin or heavy metal chelate resin or the amino-sulfonic group heavy metal chelate resin.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103241969A (en) * | 2013-05-24 | 2013-08-14 | 南京工程学院 | Method for treating waste incineration fly ash |
| CN103394497A (en) * | 2013-05-29 | 2013-11-20 | 厦门腾远资源应用科技开发有限公司 | Environmentally-friendly dedusting ash processing apparatus |
| CN103822211A (en) * | 2014-03-03 | 2014-05-28 | 李先旺 | Gelatinization sintering treatment method of waste incineration fly ash and waste treatment method |
| 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 |
| CN105623286A (en) * | 2016-03-10 | 2016-06-01 | 重庆三峰环境产业集团有限公司 | Method for wrapping MSWI (unicipal solid waste incineration) fly ash with high polymer material and clean application of MSWI fly ash in pavement |
| CN108467236A (en) * | 2018-03-13 | 2018-08-31 | 湖南恒凯环保科技投资有限公司 | A kind of stable curing continuous processing technique of heavy metal waste slag |
| CN109174906A (en) * | 2018-08-31 | 2019-01-11 | 浙江理工大学 | A kind of apparatus and method solidifying flying dust |
| CN110171934A (en) * | 2019-05-17 | 2019-08-27 | 南京晓庄学院 | A kind of incineration of refuse flyash cooperates with regeneration treating method with building waste wood |
| CN110270581A (en) * | 2019-07-02 | 2019-09-24 | 华北理工大学 | A kind of subterranean consolidation filling collaboration resource utilization incineration of refuse flyash production technology |
| CN111516108A (en) * | 2020-04-22 | 2020-08-11 | 秦皇岛海涛万福集团有限公司 | Fly ash solidification equipment for funeral and interment places |
| CN113102467A (en) * | 2021-04-20 | 2021-07-13 | 瀚蓝绿电固废处理(佛山)有限公司 | Fly ash chelation treatment method capable of strengthening heavy metal stabilization and composite stabilizer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN105623286A (en) * | 2016-03-10 | 2016-06-01 | 重庆三峰环境产业集团有限公司 | Method for wrapping MSWI (unicipal solid waste incineration) fly ash with high polymer material and clean application of MSWI fly ash in pavement |
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| CN109174906A (en) * | 2018-08-31 | 2019-01-11 | 浙江理工大学 | A kind of apparatus and method solidifying flying dust |
| CN110171934A (en) * | 2019-05-17 | 2019-08-27 | 南京晓庄学院 | A kind of incineration of refuse flyash cooperates with regeneration treating method with building waste wood |
| CN110270581A (en) * | 2019-07-02 | 2019-09-24 | 华北理工大学 | A kind of subterranean consolidation filling collaboration resource utilization incineration of refuse flyash production technology |
| CN110270581B (en) * | 2019-07-02 | 2022-04-12 | 华北理工大学 | Production process for utilizing waste incineration fly ash by underground cementing filling and resource utilization |
| CN111516108A (en) * | 2020-04-22 | 2020-08-11 | 秦皇岛海涛万福集团有限公司 | Fly ash solidification equipment for funeral and interment places |
| CN113102467A (en) * | 2021-04-20 | 2021-07-13 | 瀚蓝绿电固废处理(佛山)有限公司 | Fly ash chelation treatment method capable of strengthening heavy metal stabilization and composite stabilizer |
| CN113102467B (en) * | 2021-04-20 | 2022-03-18 | 瀚蓝绿电固废处理(佛山)有限公司 | Fly ash chelation treatment method capable of strengthening heavy metal stabilization and composite stabilizer |
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Application publication date: 20111130 |