CN105502977A - Flying ash washing dechlorination system - Google Patents
Flying ash washing dechlorination system Download PDFInfo
- Publication number
- CN105502977A CN105502977A CN201511031316.8A CN201511031316A CN105502977A CN 105502977 A CN105502977 A CN 105502977A CN 201511031316 A CN201511031316 A CN 201511031316A CN 105502977 A CN105502977 A CN 105502977A
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- CN
- China
- Prior art keywords
- flying dust
- stirring tank
- water
- vacuum belt
- dechlorination system
- 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.)
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Classifications
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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
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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
- C04B7/36—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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a flying ash washing dechlorination system. The flying ash washing dechlorination system comprises a dry flying ash storage tank, wherein a discharging opening in the bottom of the dry flying ash storage tank is connected with a feeding opening of a measuring scale, a feeding opening of a screw conveyor is connected to a discharging opening of the measuring scale, a discharging opening of the screw conveyor is connected to a feeding opening of a stirring kettle, a water inlet of the stirring kettle is communicated to a water storage pool, a discharging opening of the stirring kettle is communicated to a feeding opening of a vacuum belt conveyor, a discharging opening of the vacuum belt conveyor is communicated to a wet flying ash storage chamber by virtue of a pipeline, and a filtrate outlet of the vacuum belt conveyor is also communicated to a filtrate water pool by virtue of a pipeline. The system is simple, low in operation expense and capable of effectively removing the chloridion in the flying ash.
Description
Technical field
The present invention relates to flying dust washing dechlorination field, specifically a kind of flying dust washing dechlorination system.
Background technology
In recent years along with waste incineration is in the fast development of China, as the product of waste incineration, the output of flying dust also rises year by year.Incineration of refuse flyash has the dual hazard profile that Leaching of Heavy Metals concentration is high and Dioxins toxic equivalent is large, belongs to Hazardous wastes.
The main component of flying dust is CaO, Al2O3, SiO2 etc., and the raw material of this and manufacture of cement is similar, can the siliceous or calcareous raw material of Some substitute.Cement rotary kiln has temperature high (more than 1450 DEG C), in kiln, high-temperature gas turbulent flow is strong, the features such as alkaline atmosphere, effectively can decompose dioxin and by the most heavy metals immobilizations in danger wastes in grog, generate stable saline minerals, avoid its pollution again to environment.The incineration fly ash cement kiln product put that coexists is cement, does not have waste residue to produce.The difficult problem disposed for current flying dust and the environmental hazard brought, utilize cement kiln synergic processing flying dust can save natural matter for cement industry, reducing emission of carbon dioxide, and the disposal and the running cost that reduce flying dust, realize changing waste into resources and innoxious high unity.
In finished cement, chloride ion content is higher, is corrosive to steel.And the cl content in flying dust is up to more than 10%, consider that in cement, other raw material also can bring a certain amount of chlorion into, generally can not more than 0.5% without the volume of pretreated flying dust in cement slurry, processing power is very limited.It is fairly obvious that washing process removes harmful ion effect, and after washing, in flying dust, cl content significantly declines, and can improve the amount of cement kiln synergic processing flying dust, realizes the mass-producing application of cement kiln synergic processing flying dust.
Summary of the invention the object of this invention is to provide a kind of flying dust washing dechlorination system, to solve the problem that in the prior art cement course of processing, in flying dust, cl content is high.
In order to achieve the above object, the technical solution adopted in the present invention is:
A kind of flying dust washing dechlorination system, it is characterized in that: comprise dry flying dust hold-up vessel, weigher, worm conveyor, stirring tank, vacuum belt machine, wet flying dust storage warehouse, filtrate pond, water reservoir, discharge port is provided with bottom described dry flying dust hold-up vessel, and dry flying dust hold-up vessel bottom discharge mouth is connected with weigher opening for feed, described helical feed machine inlet capable accepts weigher discharge port, worm conveyor discharge port is connected with stirring tank opening for feed, the water-in of stirring tank by pipeline connection to water reservoir, the discharge port of stirring tank by pipeline connection to the opening for feed of vacuum belt machine, and stirring tank, between vacuum belt machine, pipeline is provided with paste pump, the discharge port of vacuum belt machine is by the extremely wet flying dust storage warehouse of pipeline connection, the filtrate relief outlet of vacuum belt machine also by pipeline connection to filtrate pond.
Described a kind of flying dust washing dechlorination system, is characterized in that: described dry flying dust hold-up vessel bottom discharge mouth is provided with constant-flow feeding device.
Described a kind of flying dust washing dechlorination system, it is characterized in that: described weigher applies the mechanics principle being subject to Coriolis force effect when particle does relative movement in uniform rotation frame of reference, measure the mass rate of pulverulent material, can accurate measurement powder material.
Described a kind of flying dust washing dechlorination system, is characterized in that: described worm conveyor requires good airproof performance.
Described a kind of flying dust washing dechlorination system, is characterized in that: the stirrer rotating speed in described stirring tank is adjustable, and stirring tank inwall arranges turbulence plate.
Described a kind of flying dust washing dechlorination system, it is characterized in that: in described water reservoir, water gets to stirring tank by water pump, the water outlet of water pump arranges under meter, for metering water quantity.
Described a kind of flying dust washing dechlorination system, is characterized in that: add drainage auxiliary agent in described vacuum belt machine, improves filtration efficiency and effect.
Advantage of the present invention is:
The present invention, its system is simple, and working cost is low, can effectively remove chlorion in flying dust, can improve the amount of cement kiln synergic processing flying dust, realizes the mass-producing application of cement kiln synergic processing flying dust, has higher economy and society environmental benefit.
Accompanying drawing explanation
Fig. 1 is present system structure iron.
Embodiment
Shown in Figure 1, a kind of flying dust washing dechlorination system, comprise dry flying dust hold-up vessel 1, weigher 3, worm conveyor 4, stirring tank 5, vacuum belt machine 8, wet flying dust storage warehouse 10, filtrate pond 9, water reservoir 6, discharge port is provided with bottom dry flying dust hold-up vessel 1, and dry flying dust hold-up vessel 1 bottom discharge mouth is connected with weigher 3 opening for feed, worm conveyor 4 opening for feed accepts weigher 3 discharge port, worm conveyor 4 discharge port is connected with stirring tank 5 opening for feed, the water-in of stirring tank 5 by pipeline connection to water reservoir 6, the discharge port of stirring tank 5 by pipeline connection to the opening for feed of vacuum belt machine 8, and stirring tank 5, between vacuum belt machine 8, pipeline is provided with paste pump 7, the discharge port of vacuum belt machine 8 is by the extremely wet flying dust storage warehouse 10 of pipeline connection, the filtrate relief outlet of vacuum belt machine 8 also by pipeline connection to filtrate pond 9.
Dry flying dust hold-up vessel 1 bottom discharge mouth is provided with constant-flow feeding device 2.
Water washing process is specially: flying dust by feed 2, metering 3, spiral conveyer equipment 4 enters stirring tank 5 from dry flying dust hold-up vessel 1, stirring tank 5 adds process water while entering flying dust, and water temperature is 30 DEG C, is 3: 1(mL/g in water cement ratio) ratio add.After stirring tank charging, open stirrer stirring 15min and wash, then time of repose 10min.
By this system washing flying dust, significantly can reduce the content of chlorion in flying dust, so that the mass-producing application of cement kiln synergic processing flying dust.
Water-washing step is divided into once to be washed.When repeatedly washing, chlorion elution amount is all than high during a step washing, but increasing degree is all less, and maximum amplification is no more than 5%.Once washing can ensure the clearance of chlorion, and water saving, simplified system.Along with the increase of process water temperature, the elution amount of chlorion increases to some extent, but the amplitude increased is very little.Therefore adopt 30 DEG C of process waters most economical.Water source can adopt service water, river, Living Water, Zhong Shui.Stir 15min to carry out, time of repose 10min, can ensure the clearance of chlorion, save time again, increase work efficiency.
Constant-flow feeding device 2 is arranged on below dry flying dust hold-up vessel 1, and its effect is the flying dust providing stability of flow adjustable to weigher 3.Flying dust enters weigher 3 through constant-flow feeding device 2, and control device, according to weigher instantaneous delivery measured value and set(ting)value comparative result feedback regulation feeding coal, makes momentary value tracking fixed valure all the time, thus the metering realized flying dust feeding coal and control.
Weigher 3 applies the mechanics principle being subject to Coriolis force effect when particle does relative movement in uniform rotation frame of reference, measures the mass rate of pulverulent material, can accurate measurement powder material.
Worm conveyor 4 requires good airproof performance.
Stirring tank 5 has two features, and the stirrer rotating speed in one stirring tank is adjustable, can wash away chlorion in flying dust with comparatively low power consumption within the effective time; Its two, stirring tank inwall arranges turbulence plate, increase stir coefficient to ensure that solid-liquid fully mixes, chlorion clearance can be ensured.
Water reservoir 6 provides water source for washing flying dust.By water pump, the water in water reservoir is got to stirring tank, pump discharge arranges under meter, for metering water quantity.
Mortar (grey water mixture), after washing, is pumped to vacuum belt machine 8 by paste pump 7 by flying dust.The thick soft solid materials of the suitable conveying of paste pump 7, adaptable to material, has high-pressure delivery characteristic.
Vacuum belt machine 8 is for reducing the water ratio of wet flying dust.Vacuum belt machine adds drainage auxiliary agent, improves filtration efficiency and effect, thus reduce further the water ratio of wet flying dust.
The waste water that filtrate pond 9 produces for collecting vacuum belt machine 8 suction strainer, is then transferred to waste water processing station by water pump.
Wet flying dust storage warehouse 10 is for storing the wet flying dust after vacuum belt machine 8 dewaters, products for further harmlessness disposing.
After flying dust washing, water ratio is about 30%, and the flying dust water ratio after vacuum belt machine suction strainer is below 20%, so that mass-producing cement kiln synergic processing, is unlikely to, because moisture is too high, to cause excessive impact to manufacture of cement.Vacuum belt machine power consumption is low, dewatering efficiency is high.
System dechlorination effect: in flying dust, chlorion maximum material removal rate can reach 90%.
Claims (7)
1. a flying dust washing dechlorination system, it is characterized in that: comprise dry flying dust hold-up vessel, weigher, worm conveyor, stirring tank, vacuum belt machine, wet flying dust storage warehouse, filtrate pond, water reservoir, discharge port is provided with bottom described dry flying dust hold-up vessel, and dry flying dust hold-up vessel bottom discharge mouth is connected with weigher opening for feed, described helical feed machine inlet capable accepts weigher discharge port, worm conveyor discharge port is connected with stirring tank opening for feed, the water-in of stirring tank by pipeline connection to water reservoir, the discharge port of stirring tank by pipeline connection to the opening for feed of vacuum belt machine, and stirring tank, between vacuum belt machine, pipeline is provided with paste pump, the discharge port of vacuum belt machine is by the extremely wet flying dust storage warehouse of pipeline connection, the filtrate relief outlet of vacuum belt machine also by pipeline connection to filtrate pond.
2. a kind of flying dust washing dechlorination system according to claim 1, is characterized in that: described dry flying dust hold-up vessel bottom discharge mouth is provided with constant-flow feeding device.
3. a kind of flying dust washing dechlorination system according to claim 1, it is characterized in that: described weigher applies the mechanics principle being subject to Coriolis force effect when particle does relative movement in uniform rotation frame of reference, measure the mass rate of pulverulent material, can accurate measurement powder material.
4. a kind of flying dust washing dechlorination system according to claim 1, is characterized in that: described worm conveyor requires good airproof performance.
5. a kind of flying dust washing dechlorination system according to claim 1, is characterized in that: the stirrer rotating speed in described stirring tank is adjustable, and stirring tank inwall arranges turbulence plate.
6. a kind of flying dust washing dechlorination system according to claim 1, it is characterized in that: in described water reservoir, water gets to stirring tank by water pump, the water outlet of water pump arranges under meter, for metering water quantity.
7. a kind of flying dust washing dechlorination system according to claim 1, is characterized in that: add drainage auxiliary agent in described vacuum belt machine, improves filtration efficiency and effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031316.8A CN105502977A (en) | 2015-12-31 | 2015-12-31 | Flying ash washing dechlorination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031316.8A CN105502977A (en) | 2015-12-31 | 2015-12-31 | Flying ash washing dechlorination system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105502977A true CN105502977A (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511031316.8A Pending CN105502977A (en) | 2015-12-31 | 2015-12-31 | Flying ash washing dechlorination system |
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| CN (1) | CN105502977A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110917719A (en) * | 2019-12-24 | 2020-03-27 | 上海和惠生态环境科技有限公司 | Vacuum filter applied to fly ash washing system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201325778Y (en) * | 2008-09-22 | 2009-10-14 | 河南豫光锌业有限公司 | Feeding device of screw conveyer |
| 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 |
| CN104998885A (en) * | 2015-03-06 | 2015-10-28 | 大峘集团有限公司 | Water-saving desulfurized ash dechlorinating method and device |
-
2015
- 2015-12-31 CN CN201511031316.8A patent/CN105502977A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201325778Y (en) * | 2008-09-22 | 2009-10-14 | 河南豫光锌业有限公司 | Feeding device of screw conveyer |
| 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 |
| CN104998885A (en) * | 2015-03-06 | 2015-10-28 | 大峘集团有限公司 | Water-saving desulfurized ash dechlorinating method and device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110917719A (en) * | 2019-12-24 | 2020-03-27 | 上海和惠生态环境科技有限公司 | Vacuum filter applied to fly ash washing system |
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Application publication date: 20160420 |