CN105481274A - Water processing device and method for household garbage incineration fly ash - Google Patents
Water processing device and method for household garbage incineration fly ash Download PDFInfo
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- CN105481274A CN105481274A CN201511030410.1A CN201511030410A CN105481274A CN 105481274 A CN105481274 A CN 105481274A CN 201511030410 A CN201511030410 A CN 201511030410A CN 105481274 A CN105481274 A CN 105481274A
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- water
- washing
- flying dust
- countercurrent
- fly ash
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- 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 water processing device and method for household garbage incineration fly ash. Fly ash in a countercurrent washer reversely flows upwards and is pushed and countercurrent contact washing is performed on the fly ash and water flow flowing downwards, a dehydration device dehydrates the washed fly ash, and then the fly ash is conveyed through a conveying device to a cement kiln system on a cement production line to be disposed and utilized. The countercurrent contact mode is adopted, sufficient multi-stage washing is performed on the fly ash and the water in the continuous countercurrent washer, soluble salt wrapped by the fly ash can be diffused and dissolved in the process on the condition that the certain concentration difference is kept, and the content of chlorine salt remaining in the washed and dehydrated fly ash meets the coprocessing requirement of a cement kiln; coagulation sedimentation, sand filtration and film filtration are performed on washing outflow water with the high salt content for further removing the remaining micro quantity of hazardous particles, and the quality requirement for standard sea drainage or bittern salt manufacturing is met.
Description
Technical field
The present invention relates to solid waste disposal and disposal technology field, be specifically related to washing treatment unit and the method for domestic garbage incineration flyash.
Background technology
Along with improving constantly of urbanization degree, domestic city refuse production also increases year by year, because traditional sanitary landfill method exists more defect, adopts the city of incineration treatment method to get more and more.But a certain amount of flying dust can be produced in Refuse Incineration Process, wherein be enriched with the Dioxins, furans etc. of soluble salt, heavy metal (Cd, Pb, Zn and Cu etc.) and trace, than 10-100 high in general soil doubly, incineration of refuse flyash has been classified as Hazardous wastes (being numbered HW18) and has managed the content of toxic element by " National Hazard refuse register ".Because the generation of incineration of refuse flyash is very large, adopt the method for disposal of usual Hazardous wastes obviously uneconomical to process this type of flying dust, therefore, exploiting economy is rationally disposed or is utilized the operational path of city garbage burning flying ash to seem very urgent.
At present, the harmless treatment mode of domestic and international city garbage burning flying ash mainly contains cement solidification, melting and solidification, chemical agent stabilization and recycling] etc.Chemical composition due to incineration of refuse flyash is similar to silicon, the calcareous raw material of cement, so this type of flying dust can be utilized to replace part of cement raw material to produce cement for cooperative disposal, and the Dioxins in flying dust can thoroughly decompose by the curing temperature up to 1450 DEG C in cement rotary kiln, and heavy metal also can be well fixed.But the domestic refuse of the plastics such as a large amount of vinylchlorid, polyvinyl chloride and high cl content is contained due to domestic refuse; cause the high villaumite that in flying dust, enrichment is formed to volatilize in a large number in high-temperature burning process; then cause the burn into skinning of rotary kiln inwall even to block when cryogenic condensation; affect the normal operation of whole kiln system; hazardous conditions such as shutting down even decomposition furnace system blast can be caused time serious; and high villaumite also directly can affect the quality of cement kiln product; obviously, the high villaumite in incineration of refuse flyash is the main cause hindering its comprehensive utilization.Obviously, carrying out water logging pre-treatment to flying dust and can remove solubility villaumite, carry out cement kiln associated treatment Absorbable organic halogens, and effectively reduce the toxic of heavy metal and the environmental risk level of other noxious pollutants, is think the most effective flying dust process approach at present.
Chinese invention patent ZL201010162532.7 discloses a kind of method for the treatment of incinerated fly ash of domestic garbage with cooperation of cement kiln on September 1st, 2010, by carrying out intermittent type three grades or single-stage water-washing pre-treatment and cement kiln synergic processing technology to flying dust, wherein tertiary effluent is washed technique in engineer applied, is achieved good effect, but also expose that its technical process is long, facility investment large simultaneously, flying dust residual chlorine after washing and the problem such as running cost is higher.
Summary of the invention
Technical problem to be solved by this invention is just to provide washing treatment unit and the method for one way of life incineration of refuse flyash, reaches the object of shortened process, investment reduction and working cost.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the washing treatment unit of one way of life incineration of refuse flyash, comprises countercurrent washer, dewatering unit and e Foerderanlage; In countercurrent washer, flying dust upruss pushes and carries out counter current contact washing with the current flowed downward, and described dewatering unit is by after the flying dust dehydration after washing, and the quality coal in cement kiln systems be delivered on cement producing line by e Foerderanlage carries out treatment and use.
Preferably, described countercurrent washer comprises columnar cylindrical shell and is located at the spiral conveying blade in cylindrical shell, and described cylindrical shell is obliquely installed, and at the bottom of cylindrical shell, section is provided with flying dust and adds mouth, and on cylindrical shell top, section is provided with clear water entrance, and described spiral conveying blade is provided with perforate.
Preferably, described dewatering unit is centrifuge, and described e Foerderanlage is ram pump.
Preferably, also comprise wash water backflow pool, wash water reflux pump, be provided with wash water reflux inlet at countercurrent washer top, the water deviate from through dewatering unit flow to wash water backflow pool certainly, then delivers to wash water reflux inlet through wash water reflux pump.
Preferably, also comprise and wash out water treatment system, just heavy and filtration unit is provided with bottom countercurrent washer, described water treatment system of washing out comprises coagulative precipitation tank, sandfiltration pot, bittern collecting tank, enter coagulative precipitation tank by just heavy and filtration unit washing water outlet out and carry out reaction precipitation, clear liquid in coagulative precipitation tank is removed after suspended particulates through sandfiltration pot and is flowed into bittern collecting tank, adds acid solution adjust pH to neutral in bittern collecting tank.
Preferably, also comprise membrane filtration module, the neutral bittern of bittern collecting tank is delivered to membrane filtration module and is filtered by brine pump, membrane filtration module reach the standard of bittern salt manufacturing through water after carry out salt manufacturing, or as the raw brine of chemical industry for making chlorine and alkali, or directly arrange sea after reaching emission standard through water.
Preferably, the glaur bottom coagulative precipitation tank is recycled to flying dust in batches and adds mouth, enters in continuous countercurrent washer; The concentrated solution that membrane filtration module produces is delivered to flying dust and is added mouth, enters in continuous countercurrent washer.
Present invention also offers the water washing treatment method of one way of life incineration of refuse flyash, comprise the steps:
(1) flying dust and water carry out continuous countercurrent and contact and wash in countercurrent washer;
(2) flying dust after washing is after dewatering unit dehydration, and the quality coal in cement kiln systems be directly delivered on cement producing line through e Foerderanlage carries out treatment and use;
(3) by the washing water outlet of countercurrent washer through washing out water treatment system process, utilize or the relevant criterion of directly discharge to reach bittern salt manufacturing.
Preferably, in countercurrent washer water and flying dust according to water: the weight ratio of flying dust=5:1 ~ 15:1 carries out countercurrent washing.
Preferably, clear water adds continuously from the clear water entrance of countercurrent washer, regulates the add-on of clear water, maintains the discrepancy in elevation of countercurrent washer water inlet liquid level and water outlet liquid level, control the dosage of flying dust and the rotating speed of adjusting screw conveying blade, make the mean residence time of flying dust be 15 ~ 40 minutes.
The technical solution used in the present invention, the villaumite composition in flying dust is utilized to be soluble in the water of meta-alkalescence, and the objectionable impurities such as heavy metal compound and Dioxins thereof is wherein difficult to be dissolved in the physical property in alkaline polyhalide water solution, the mode of counter current contact is adopted to make flying dust and water in continuous countercurrent washer, carry out sufficient multistage washing, the solubility salt wrapped up in flying dust is in the process spread and is dissolved under the concentration difference condition that maintenance is certain, and the chloride content that the flying dust after washing and dewatering is remained reaches the requirement of cement kiln associated treatment; The particulates emission of remaining trace is removed in the washing water outlet that saliferous is higher further through coagulating sedimentation, sand filtration and membrane filtration process, realize row up to standard sea or reach bittern salt manufacturing specification of quality.
Therefore, present invention process flow process is short, reduced investment, working cost are more reasonable, and process product can be utilized effectively, and resource utilization is higher, also environmental protection more.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is the structural representation of the washing treatment unit of domestic garbage incineration flyash in the present invention.
Embodiment
As shown in Figure 1, the washing treatment unit of one way of life incineration of refuse flyash, comprises countercurrent washer 5, dewatering unit and e Foerderanlage.
Wherein countercurrent washer 5 comprises columnar cylindrical shell and is located at the spiral conveying blade in cylindrical shell, and described cylindrical shell is obliquely installed, and at the bottom of cylindrical shell, section is provided with flying dust and adds mouth, and on cylindrical shell top, section is provided with clear water entrance, and described spiral conveying blade is provided with perforate.The concrete angle of inclination of countercurrent washer 5 is preferably 40 ~ 60 degree, and to make water slowly flow downward, the flying dust that upruss is carried fully contacts washing, is provided with ash silo 6 above flying dust input port, and ash silo throws in flying dust to flying dust input port.The bottom of flying dust input port is cone cylindrical structure, is provided with propulsion blades and is pushed to continuously in countercurrent washer 5 by the flying dust in flying dust input port in flying dust input port.
Fly ash carry in ash silo 6 is to the flying dust input port of countercurrent washer 5, in countercurrent washer 5, flying dust fully mixes with wash water wherein under the condition stirred, flying dust is upwards agitating type propelling movement under the effect of spiral conveying blade, and carry out counter current contact washing with the current of downward sluggish flow, flying dust soluble salt wherein in the process of boosting is leached gradually under the condition remaining finite concentration difference, control the dosage of flying dust and the rotating speed of adjusting screw conveying blade, its mean residence time is made to be 15 ~ 40 minutes, to ensure that flying dust fully contacts washing with wash water, soluble salt is finally being leached.
Above-mentioned dewatering unit is centrifuge 2, and e Foerderanlage is ram pump 1.The flying dust chloride content being delivered to countercurrent washer top through spiral conveying blade is down to minimum, and enter centrifuge be removed to water ratio about 24 ~ 34% together with part wash water, not drying, the quality coal in cement kiln systems be directly delivered on cement producing line through ram pump carries out treatment and use.Because countercurrent washer, centrifuge, ram pump can be connect in succession by interface direct, this ensure that the continuity of technique, can treatment scheme be shortened, cost-saving.
Further, also comprise wash water backflow pool 4, wash water reflux pump 3, be provided with wash water reflux inlet at countercurrent washer top, the water deviate from through dewatering unit flow to wash water backflow pool certainly, then delivers to wash water reflux inlet through wash water reflux pump.The water deviate from through centrifuge flow to wash water backflow pool certainly, then delivers to the wash water reflux inlet at washer top through wash water reflux pump.
Clear water adds continuously from the top clear water entrance of countercurrent washer, and slowly flow downward from the perforate countercurrent washer cylindrical wall and screw-blade gap and screw-blade, carry out counter current contact with the flying dust of boosting simultaneously, fully leach soluble organic fraction wherein in the process, the rotating speed and the clear water that control spiral conveying blade add speed, make the hydraulic detention time average out to of wash water in continuous countercurrent washer 20 ~ 50 minutes; Owing to there is a large amount of CaO compositions in flying dust, make the pH value of high salinity washings be greater than 11, inhibit the leaching of the objectionable impurities such as heavy metal and Dioxins, therefore these objectionable impuritiess are left in the solid phase flying dust after washing.The washing water outlet of saliferous exports to enter through the first heavy and filtration unit be located on continuous countercurrent washer washs out water treatment system.
Further, also comprise and wash out water treatment system, bottom countercurrent washer, be provided with just heavy and filtration unit, described water treatment system of washing out comprises coagulative precipitation tank 7, sandfiltration pot 8, bittern collecting tank 9, brine pump 10, membrane filtration module 11.
Wherein, enter coagulative precipitation tank 7 after washing water outlet adds coagulated agent and carry out reaction precipitation, minute solid particles is wherein removed in trapping, and supernatant liquor flows into bittern collecting tank 9 again after sandfiltration pot 8 removes suspended particulates further, and adds a small amount of hydrochloric acid adjust pH to neutral; Glaur bottom coagulative precipitation tank is recycled to flying dust in batches and adds mouth and enter in continuous countercurrent washer.
With brine pump, the neutral bittern of bittern collecting tank is delivered to tubular membrane (ultrafiltration or microfiltration membrane) filter assemblies, remove more tiny particulate, the concentration of further reduction objectionable impurities, carries out the utilization of resources or directly arranges sea after making it reach the relevant criterion in bittern salt manufacturing or row sea; The concentrated solution of tubular membrane filter assemblies is delivered to flying dust and is added mouth and enter in continuous countercurrent washer again.
Membrane filtration module can remove more tiny particulate, reduces the concentration of objectionable impurities further, carries out the utilization of resources or directly arranges sea after making it reach the relevant criterion in bittern salt manufacturing or row sea.
Present invention also offers the water washing treatment method of one way of life incineration of refuse flyash, comprise the steps:
(1) flying dust and water carry out continuous countercurrent and contact and wash in countercurrent washer;
(2) flying dust after washing is after dewatering unit dehydration, and the quality coal in cement kiln systems be directly delivered on cement producing line through e Foerderanlage carries out treatment and use;
(3) by washing water outlet through washing out water treatment system process.
Wherein, in step (3), or with brine pump 10, the neutral bittern of bittern collecting tank 9 is delivered to membrane filtration module 11, the concentrated solution produced is delivered to flying dust and is added mouth and enter in continuous countercurrent washer 5 again, carry out making (industry) salt reach the relevant criterion of bittern salt manufacturing through water after to utilize, also can be used as chemical industry for making chlorine and alkali (bittern) raw material.Or with brine pump 10, the neutral bittern of bittern collecting tank 9 is delivered to membrane filtration module 11, the concentrated solution of generation is delivered to flying dust and is added mouth and enter in continuous countercurrent washer 5 again, directly arranges sea after reaching emission standard through water.
The water cement ratio that flying dust is held in continuous countercurrent washer is according to water: the weight ratio of flying dust=5:1 ~ 15:1 carries out countercurrent washing, control the add-on of clear water and the rotating speed of spiral conveying blade, regulate the discrepancy in elevation of countercurrent washer water inlet liquid level and water outlet liquid level, it is 0.8 ~ 1.6kg (water)/kg (ash) that the consumption of fresh water is controlled.
Flying dust is through continuous countercurrent washing and centrifugal dehydration treatment, in the flying dust slag finally obtained, chloride ion content is less than 0.4%, water ratio is 24 ~ 34%, and can deliver to the utilization of cement kiln associated treatment by direct ram pump, also guarantees the associated treatment process stability of its postorder.
The higher washing water outlet of saliferous, after coagulating sedimentation, sand filtration and membrane filtration tertiary treatment, removes the particulates emission of remaining trace further, can realize row up to standard extra large or reach bittern salt manufacturing specification of quality and fully utilize.
Certainly, protection scope of the present invention is not limited to above-described embodiment, as dewatering unit also can adopt pressure filter to dewater, and the mode that e Foerderanlage can adopt worm conveyor and band to transmit.
Claims (10)
1. the washing treatment unit of one way of life incineration of refuse flyash, is characterized in that: comprise countercurrent washer, dewatering unit and e Foerderanlage; In countercurrent washer, flying dust upruss pushes and carries out counter current contact washing with the current flowed downward, and described dewatering unit is by after the flying dust dehydration after washing, and the quality coal in cement kiln systems be delivered on cement producing line by e Foerderanlage carries out treatment and use.
2. the washing treatment unit of one way of life incineration of refuse flyash according to claim 1, it is characterized in that: described countercurrent washer comprises columnar cylindrical shell and is located at the spiral conveying blade in cylindrical shell, described cylindrical shell is obliquely installed, at the bottom of cylindrical shell, section is provided with flying dust and adds mouth, on cylindrical shell top, section is provided with clear water entrance, and described spiral conveying blade is provided with perforate.
3. the washing treatment unit of one way of life incineration of refuse flyash according to claim 1, is characterized in that: described dewatering unit is centrifuge, and described e Foerderanlage is ram pump.
4. the washing treatment unit of one way of life incineration of refuse flyash according to claim 1, it is characterized in that: also comprise wash water backflow pool, wash water reflux pump, wash water reflux inlet is provided with at countercurrent washer top, the water deviate from through dewatering unit flow to wash water backflow pool certainly, then delivers to wash water reflux inlet through wash water reflux pump.
5. the washing treatment unit of the one way of life incineration of refuse flyash according to Claims 1-4 any one, it is characterized in that: also comprise and wash out water treatment system, just heavy and filtration unit is provided with bottom countercurrent washer, described water treatment system of washing out comprises coagulative precipitation tank, sandfiltration pot, bittern collecting tank, enter coagulative precipitation tank by just heavy and filtration unit washing water outlet out and carry out reaction precipitation, clear liquid in coagulative precipitation tank is removed after suspended particulates through sandfiltration pot and is flowed into bittern collecting tank, adds acid solution adjust pH to neutral in bittern collecting tank.
6. the washing treatment unit of one way of life incineration of refuse flyash according to claim 5, it is characterized in that: also comprise membrane filtration module, the neutral bittern of bittern collecting tank is delivered to membrane filtration module and is filtered by brine pump, membrane filtration module reach the standard of bittern salt manufacturing through water after carry out salt manufacturing, or as the raw brine of chemical industry for making chlorine and alkali, or directly arrange sea after reaching emission standard through water.
7. the washing treatment unit of one way of life incineration of refuse flyash according to claim 6, is characterized in that: the glaur bottom coagulative precipitation tank is recycled to flying dust in batches and adds mouth, enters in continuous countercurrent washer; The concentrated solution that membrane filtration module produces is delivered to flying dust and is added mouth, enters in continuous countercurrent washer.
8. the water washing treatment method of one way of life incineration of refuse flyash, is characterized in that comprising the steps:
(1) flying dust and water carry out continuous countercurrent and contact and wash in countercurrent washer;
(2) flying dust after washing is after dewatering unit dehydration, and the quality coal in cement kiln systems be directly delivered on cement producing line through e Foerderanlage carries out treatment and use;
(3) by the washing water outlet of countercurrent washer through washing out water treatment system process, utilize or the relevant criterion of directly discharge to reach bittern salt manufacturing.
9. the water washing treatment method of one way of life incineration of refuse flyash according to claim 8, is characterized in that: in countercurrent washer, water and flying dust are according to water: the weight ratio of flying dust=5:1 ~ 15:1 carries out countercurrent washing.
10. the water washing treatment method of one way of life incineration of refuse flyash according to claim 8, it is characterized in that: clear water adds continuously from the clear water entrance of countercurrent washer, regulate the add-on of clear water, maintain the discrepancy in elevation of countercurrent washer water inlet liquid level and water outlet liquid level, control the dosage of flying dust and the rotating speed of adjusting screw conveying blade, make the mean residence time of flying dust be 15 ~ 40 minutes.
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| CN201511030410.1A CN105481274A (en) | 2015-12-31 | 2015-12-31 | Water processing device and method for household garbage incineration fly ash |
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| CN201511030410.1A CN105481274A (en) | 2015-12-31 | 2015-12-31 | Water processing device and method for household garbage incineration fly ash |
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| CN105481274A true CN105481274A (en) | 2016-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530162A (en) * | 2020-04-22 | 2020-08-14 | 宁波龙育机械设备有限公司 | Continuous batch fly ash washing method |
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| CN101817650A (en) * | 2010-05-04 | 2010-09-01 | 北京市琉璃河水泥有限公司 | Method for treating incinerated fly ash of domestic garbage with cooperation of cement kiln |
| CN101913785A (en) * | 2010-07-19 | 2010-12-15 | 郑慧 | Incineration fly ash cement kiln synergic processing process |
| CN204564745U (en) * | 2015-04-14 | 2015-08-19 | 浙江环立环保科技有限公司 | A kind of flying ash pretreatment system |
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2015
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Patent Citations (3)
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| CN101817650A (en) * | 2010-05-04 | 2010-09-01 | 北京市琉璃河水泥有限公司 | Method for treating incinerated fly ash of domestic garbage with cooperation of cement kiln |
| CN101913785A (en) * | 2010-07-19 | 2010-12-15 | 郑慧 | Incineration fly ash cement kiln synergic processing process |
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| CN111530162A (en) * | 2020-04-22 | 2020-08-14 | 宁波龙育机械设备有限公司 | Continuous batch fly ash washing method |
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Inventor after: Chen Xiongfei Inventor after: Li Yan Inventor after: Chen Yushuang Inventor after: Liao Huaping Inventor after: Yuan Xiaoguo Inventor after: Bi Yafan Inventor before: Chen Xiongfei Inventor before: Li Yan Inventor before: Chen Yushuang Inventor before: Yuan Xiaoguo Inventor before: Bi Yafan |
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Effective date of registration: 20170110 Address after: 100101 Beijing City, Chaoyang District Road No. 5 4 C405 Applicant after: Beijing Answer Engineering Technology Co., Ltd. Address before: Room 11, building No. 172, Beiyuan Road, Beijing, Chaoyang District, 100101, China Applicant before: Chen Xiongfei Applicant before: Li Yan Applicant before: Chen Yushuang Applicant before: Yuan Xiaoguo Applicant before: Bi Yafan |
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Application publication date: 20160413 |