CN1810392A - Method and system for removing chloride contained in bottom dust - Google Patents
Method and system for removing chloride contained in bottom dust Download PDFInfo
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- CN1810392A CN1810392A CN 200510005154 CN200510005154A CN1810392A CN 1810392 A CN1810392 A CN 1810392A CN 200510005154 CN200510005154 CN 200510005154 CN 200510005154 A CN200510005154 A CN 200510005154A CN 1810392 A CN1810392 A CN 1810392A
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Abstract
The present invention discloses one kind of method and system to eliminate chloride from bottom ash containing chloride for realizing reuse of bottom ash. The method includes the following stages: a leaching state of mixing bottom ash containing chloride with water as solvent to separate chloride from the bottom ash and dissolving in water; and a solid-liquid separating stage of separating water with dissolved chloride from bottom ash.
Description
Technical field
The present invention relates to a kind of utilization again and from contain muriatic bottom ash, remove muriatic method and system for the realization bottom ash, more particularly, the present invention relates to following a kind of method and system, it will contain muriatic bottom ash and dissolving water mixes, make after chloride in the above-mentioned bottom ash is dissolved in the dissolving water, from bottom ash, will be dissolved with muriatic dissolving moisture again from coming out, thereby from bottom ash, remove chloride.
Background technology
Be divided into two kinds owing to burning bottom ash that domestic refuse produces discharge position: the flying dusts such as dust that contain bottom ash of discharging from incinerator and the burning gases according to incineration plant.Wherein, according to average moisture content, the bottom ash of generation is approximately 10 weight % to 15 weight % of burning waste, and the flying dust of generation is 1 weight % to 1.5 weight %; Along with the increase of domestic refuse, owing to burning the bottom ash amount that produces the trend of increase is arranged also, so carried out the research that utilizes again in every respect bottom ash.
Especially, recently because the content of well-known carcinogen bioxin etc., flying dust becomes stubborn problem, and bottom ash is different with flying dust, and its heavy metal is with the content of bioxin is less, so is suitable for utilizing again.In fact, bottom ash has been used in various uses, and as in parking lot, bicycle lane laying and road construction, it uses as graininess lower floor packing timber; And be used for flood bank, sound insulation and sound-proof wall, in Holland, nineteen ninety-five has been formulated the regulation relevant for construction material, the bottom ash more than 90% is used as packing material, the road basement material of road flood bank, especially, bottom ash is applied to reduce in the purposes that rainwater soaks into energetically as far as possible.
Yet, though bottom ash there are differences according to the kind difference of burning waste, wherein containing the chlorine component of 1 weight % to 3 weight %, this has hindered the part of bottom ash to utilize application again.For example, when bottom ash was utilized as cement raw material again, the bottom ash composition must be identical with cement composition, but can be found by table 1: because chlorine, its composition is different from cement, so can't utilize again.
[table 1]
The chemical composition of bottom ash and cement relatively
| Classification | ig.loss * | Insol. (％) | SiO 2 (％) | Al 2O 3 (％) | Fe 2O 3 (％) | CaO (％) | MgO (％) | SO 3 (％) | Na 2O (％) | K 2O (％) | TiO 2 (％) | P 2O 5 (％) | MnO (％) | Cl (％) | |
| Bottom ash | A | 18.1 | - | 19.5 | 10.5 | 7.5 | 27.2 | 1.6 | - | 7.8 | 2.35 | 1.34 | 6.36 | 0.43 | 1.5 |
| B | 16.7 | - | 28.2 | 9.3 | 7.3 | 24.2 | 1.6 | - | 9.6 | 3.00 | 1.33 | 5.65 | 0.25 | 2.2 | |
| Cement | Common | 1.2 | 0.2 | 21.4 | 5.1 | 2.9 | 64.0 | 1.6 | 2.0 | 0.28 | 0.51 | 0.32 | 0.13 | 0.13 | 0.005 |
| Early strong | 1.0 | 0.1 | 20.6 | 4.8 | 2.7 | 65.1 | 1.5 | 2.8 | 0.23 | 0.44 | 0.28 | 0.10 | 0.11 | 0.003 | |
| Middle heat | 0.6 | 0.1 | 23.8 | 3.7 | 3.9 | 63.8 | 1.1 | 1.9 | 0.26 | 0.32 | 0.18 | 0.06 | 0.08 | 0.002 | |
| Anti-sulfate | 0.5 | 0.1 | 21.9 | 3.3 | 5.2 | 65.0 | 1.0 | 1.9 | 0.11 | 0.25 | 0.20 | 0.08 | 0.09 | 0.005 | |
(ig.loss*: be meant the material after carrying out forcing heat in 90 minutes under 950 ℃ of temperature, wherein removed unburned carbon, the crystallization water and decarbonate volatile materials in addition.)
Therefore, must from bottom ash, remove chlorine component, chlorine ion concentration is treated to smaller or equal to 1 the debita spissitudo of 000mg/kg.For this reason, part enterprise takes and will spread the method for water after the bottom ash air storage from top at present, but the processing consumption of this method is limited, and efficient is low and less economical, also has environmental issue.
Summary of the invention
The present invention proposes for addressing the above problem a little, aims to provide the method and system that a kind of chlorine component that bottom ash can be contained is effectively removed.
For the muriatic method that contains in the bottom ash of removing of the present invention, it is characterized by and comprise: in the stripping stage, it will contain muriatic bottom ash and dissolving water mixes, and makes the chloride in the above-mentioned bottom ash separate and be dissolved in the dissolving water; And solids-liquid separation step, it will be dissolved with muriatic dissolving water and separate from bottom ash.
At this moment, be preferably in before the dissolution phase, further comprise pretreatment stage, wherein remove the metallics in the bottom ash and pulverize bottom ash.
At this moment, be preferably in after the solids-liquid separation step, further comprise the wash phase that uses the high pressure pure water to clean bottom ash.
The present invention proposes three kinds and be the chlorine ion concentration that reduces to contain in the bottom ash method the chlorine component stripping.First kind is to use hyperacoustic method, and second kind is the method for utilizing ripples moving, and the third is to use the method for pressure-air.Above-mentioned three kinds of methods can independently separately be implemented, and perhaps optionally implement or implement successively.But, in the time of need being reduced to 1% to 3% the chlorine ion concentration that contains in the bottom ash smaller or equal to 1000mg/kg, preferably comprise all above-mentioned three stripping stages.
Use in the method for ultrasonic wave stripping, the bottom ash input is stored in the dissolving water in the tank, by the irradiation ultrasonic wave, increase the effect that contacts of chloride and water in the capillary pore, chloride in the bottom ash is promptly separated from above-mentioned bottom ash and be dissolved in the above-mentioned dissolving water; Utilize in the moving method of ripples, the bottom ash input is stored in the dissolving water in the tank, make the fluctuation up and down between the bottom ash location of the dissolving water water surface, thereby make the chloride in the bottom ash separate and be dissolved in the above-mentioned dissolving water; In the method that the use pressure-air impacts, make in bottom ash and the common inflow pipe of dissolving water, the injection pressure-air makes the chloride of bottom ash separate and be dissolved in dissolving water in pipe.
Description of drawings
Fig. 1 is a process chart of removing muriatic method in the bottom ash of the present invention.
Fig. 2 is an expression process chart of removing an embodiment of muriatic method in the bottom ash of the present invention.
Fig. 3 is an expression device process chart of removing an embodiment of muriatic system in the bottom ash of the present invention.
Fig. 4 is an expression structure chart of removing an embodiment of second tank of muriatic system in the bottom ash of the present invention.
Fig. 5 a is that the part of an embodiment of the expression air-pressure tube of removing muriatic system in the bottom ash of the present invention is cut front elevation.
Fig. 5 b is the profile of Fig. 5 aA-A '.
Symbol description
110 loading hoppers
120 magnetic screening machines
130 pulverizers
210 first tanks
220 second tanks
221 inflow entrances
222 tank jars
223 flow exports
224 screen clothes
225 discharge gutters
226 intercommunicating pores
227 auxiliary tanks
228 foreign matter discharge pipes
229 air injection tubes
229 ' air discharge pipe
230 air-pressure tubes
231 inner tube
232 upper interval
Between 233 lower regions
235 air chambers
236 triangle beater plates
237 air inflow apertures
240 first hydrocyclones
250 first dehydration screen clothes
260 second hydrocyclones
270 second dehydration screen clothes
310 settling tanks
320 filter presses
The specific embodiment
Fig. 1 is the process chart that contains the muriatic method that is contained in the muriatic bottom ash of removing of the present invention, has wherein presented to comprise all steps of first, second and third dissolving-out method.In view of the above, carry out following steps successively: drop into bottom ash (S1), when containing metal in the bottom ash that drops into, remove metal (S2), make chlorine component stripping from bottom ash afterwards; The method (S5) that during the stripping chlorine component, can implement to use hyperacoustic method (S3) successively, utilize the moving method (S4) of ripples and use pressure-air.After process in leaching finishes, carry out Separation of Solid and Liquid process (S6), promptly utilize centrifugal force and difference in specific gravity, the liquid of stripping chlorine component is separated with bottom ash; Separation of Solid and Liquid process (S6) uses water under high pressure to clean bottom ash and enforcement dehydration (S7) afterwards.Then, when the chlorine component that contains in the last bottom ash is less than when equaling aimed concn (S8), can be with it as utilizing material (S9) to be used again.
Below, with reference to accompanying drawing, describe the preferred embodiments of the present invention in detail.Fig. 2 is an expression process chart of removing an embodiment of the muriatic method that contains in the bottom ash of the present invention, and Fig. 3 is the device process chart that chloride that expression comprises among the present invention is removed an embodiment of system.The muriatic method that contains in the bottom ash of removing of the present invention comprises lead-in stage (S10), metal separation stage (S20), shredding stage (S30), the first stripping stage (S40), the second stripping stage (S50), the 3rd stripping stage (S60), first solids-liquid separation step (S70), first water smoking (S80), wash phase (S90), second solids-liquid separation step (S100) and second water smoking (S110).
Lead-in stage (S10), metal separation stage (S20) and shredding stage (S30) belong to pretreatment stage, in lead-in stage (S10), preferably import the bottom ash of diameter smaller or equal to 30mm, at this moment, use loading hopper 110 to import bottom ash.The metal separation stage, (S20) was the metal species of distinguishing in the bottom ash that has imported, and the stage of from bottom ash metal species being separated, and can use magnetic screening machine 120 as the device that is used for the separating metal class.Shredding stage (S30) is to use pulverizer 130, and bottom ash is ground into the process of diameter smaller or equal to 5mm, and its purpose is to improve bottom ash and the contacting efficiency that dissolves water.
The stripping stage is that bottom ash and dissolving water are mixed, and in the stage that makes the chloride in the bottom ash separate and be dissolved in the water, comprises the first stripping stage (S40), the second stripping stage (S50) and the 3rd stripping stage (S60); After the first stripping stage, (S40) finished, to dissolve on the basis that water and bottom ash separate, entered for the second stripping stage (S50) again, carried out for the second stripping stage (S50), after the second stripping stage, (S50) finished, make bottom ash and dissolving water enter for the 3rd stripping stage (S60) jointly, carried out for the 3rd stripping stage (S60).
The first stripping stage (S40) was in first tank, 210 bottom surfaces ultrasonic oscillator to be set, and to the bottom ash irradiation ultrasonic wave of inflow dissolving water, improved the effect that contacts of interior chloride of capillary pore and water, made chloride be dissolved in the stage of dissolving in the water rapidly.At this moment, employed ultrasonic frequency can be according to bottom ash treating capacity and tank height and is changed.Preferably use 10 to 100kHz frequency.
The dissolving water of first tank 210 preferably continuously flows into and flows out, so that because of the unlikely overrich of the cl concn of ultrasonic irradiation stripping; In the present embodiment, the low dissolving water of salinity that dissolves water and discharged from the top outlet 261 of aftermentioned second hydrocyclone 260 is reclaimed, flow into water as a part that continuously flows into and use, then flow out to water treatment stage continuously through the dissolving water that concentrates.At this moment, the salinity in the tank uses chlorine ion concentration sensor or electrical conduction sensor to be measured, during mensuration, if salinity, is then preferably changed the whole dissolving water in the tank more than or equal to normal concentration.
In addition, the effect that the chloride in the bottom ash is separated by the vibration ultrasonic wave is comparatively remarkable, thereby expression uses supersonic oscillations to remove the muriatic rate of removing in the bottom ash in the table 2.
[table 2]
| Classification | Experiment 1* | Experiment 2** | Remarks |
| Bottom ash concentration (mg/Kg) | 9.402 | 9.402 | |
| Cl concentration (mg/Kg) | 8.774 | 9.312 | |
| Remove rate (%) | 93.32 | 99.04 |
(experiment condition: burn grey 2g/cm
2, 12 of frequency 40kHz, output 600W, element number)
Experiment 1*: when applying 3 minutes supersonic oscillations
Experiment 2**: when applying 5 minutes supersonic oscillations
When the first stripping stage (840) finished, bottom ash is placed on the no axial screw conveyer 211, moved to for the second stripping stage (S50), at this moment, being dissolved with muriatic dissolving water separates from bottom ash, be isolated in for the first stripping stage (S40), therefore can stop the dissolving water that is dissolved with high concentration chloride to enter next stage, can reduce dissolving water use amount as far as possible.
The second stripping stage (S50) was that bottom ash is dropped in the dissolving water that stores in second tank, make the dissolving water water surface between the bottom ash location in fluctuation up and down, thereby stage in the above-mentioned dissolving water is separated and be dissolved in to the chloride in the bottom ash.
Fig. 4 is a structure chart of representing second tank in further detail.In view of the above, second tank 220 comprises tank jar 222; Screen cloth 224, its inflow entrance 221 that flows to above-mentioned tank jar 222 tops from bottom ash tilts to the flow export 223 that flows out bottom ash; Foreign matter discharge pipe 228, it is arranged at flow export 223 tops; Discharge gutter 225, it is formed at the bottom surface of tank jar 222; And auxiliary tank 227, it is arranged on the side of tank jar 222.
Screen cloth 224 makes that diameter moves to flow export 223 along the screen cloth 224 that tilts greater than screen cloth 224 bottom ash at interval in the bottom ash of inflow, diameter, is discharged to the outside through the discharge gutter 225 that is formed at tank jar 222 bottom surfaces by the bottom ash of screen cloth 224 by screen cloth 224 less than screen cloth 224 bottom ash at interval.Entered for the 3rd stripping stage at this moment, with behind the bottom ash interflow of discharging from flow export.In addition, foreign matter discharge pipe 228 is pipelines that the separating substances that density in the bottom ash is lower and showy is come out.
Auxiliary tank 227 has the intercommunicating pore 226 that is communicated with tank jar 222, also possesses air injection tube 229 and air discharge pipe 229 ' by the water level that injects the adjustable water-saving groove jar 222 of air.
The second stripping stage (S50) was by injection in auxiliary tank 227 or discharged air, thereby realizes the fluctuation up and down of dissolving water, (P when air is injected auxiliary tank 227
H), then the dissolving water in the auxiliary tank 227 enters in the tank jar 222 through intercommunicating pore 216, makes tank jar 222 water levels rising (L
H); When with air (P when auxiliary tank 227 is discharged
L), the dissolving water in the tank jar 222 enters auxiliary tank 227 through intercommunicating pore 226, makes tank jar 222 water levels decline (L
L).Therefore, air injects and discharge by carrying out repeatedly, just can repeat to make the bottom ash immersion water surface that places on the screen cloth 224 or the wave process that surfaces.By wave process, produce frictional force between bottom ash and the dissolving water, thereby make the chloride composition stripping once more in the bottom ash.
When the second stripping stage (S50) finished, the bottom ash that is dissolved in the dissolving water flowed out from flow export 223, enters for the 3rd stripping stage (S60).
The 3rd stripping stage (S60) was to make bottom ash and dissolving water flow to air-pressure tube 230 jointly, and injected pressure-air in above-mentioned pipeline, made the chloride in the bottom ash separate and be dissolved in the stage of dissolving in the water.
Fig. 5 a is the structure chart that presents air-pressure tube in more detail, and Fig. 5 b is the profile that cuts along the A-A line.In view of the above, air-pressure tube 230 comprises inner tube 231 and air chamber 235, above-mentioned inner tube 231 be between the lower region that forms by made from porous material 233 and the upper interval 232 that forms of common imporosity material be formed by connecting, and inner face top possesses triangle beater plate 236, form certain space between above-mentioned air chamber 235 and the inner tube 231, and surround inner tube 231.
Thereby 233 is to be made of made from porous material to be formed with little pore between lower region, so air can flow to little pore.233 manage 231 lowermost portion internally and begin each interval of 60 ° about occupying between the lower region that is preferably formed.At this moment, upper interval 232 occupies remaining 240 ° of intervals.
Manage 232 side internally when observing,, be provided with the triangle beater plate 236 of shape triangular in shape continuously along direction of principal axis in the inside upper part of inner tube 232.Preferred 231 the inside upper part length till triangle beater plate 236 tops of managing internally is about 1/3 of pipe diameter.
Have certain space between air chamber 235 and the inner tube 232, and air chamber 235 surrounds inner tube 232, can't see inner tube 232 fully, be formed with a plurality of air inflow apertures 237 that flow into air in air chamber 235 bottoms from the outside.
In air-pressure tube 230, dissolving water flows into air inflow aperture jointly with the bottom ash that flows to inner tube inside, and produce bump by being formed between inner tube 231 lower regions pressure-air and the triangle beater plate 236 that little pore of 233 flows into inner tube 231 inside, make to be attached to trickle chloride stripping once more in the bottom ash, thus stripping chloride dramatically.
When the 3rd stripping stage (S60) finished, enter first hydrocyclone 240 by the dissolving water of air-pressure tube 230 and the bottom ash that is dissolved in the dissolving water, begin first solids-liquid separation step (S70).
First solids-liquid separation step (S70) is to be dissolved with the stage that muriatic dissolving water is separated from bottom ash, can use hydrocyclone to be implemented.Hydrocyclone is the equipment for separating liquid from solid that utilizes centrifugal force, its structure and effect be the people (hereinafter referred to as those skilled in the art) that possesses present technique field general knowledge the known fact, therefore omit this part detailed description.When bottom ash passed through first hydrocyclone 240 jointly with dissolving water, dissolving water was from 241 discharges of top outlet, and bottom ash is discharged from bottom outlet 242.The bottom ash of discharging from bottom outlet 242 promptly uses the first dehydration screen cloth 250 to remove after the moisture through first water smoking (S80), enters wash phase (S90).
Wash phase (S90) is the stage of cleaning bottom ash, wherein uses the high pressure pure water P and second hydrocyclone 260.Promptly, on right angle orientation, the part inject high pressure pure water P that is discharged by the first dehydration screen cloth 250 in first water smoking (S80) cleans the bottom ash surface, by to bottom ash inject high pressure pure water P, the dissolving water that contains chlorion that may be present between bottom ash and bottom ash is replaced into pure water P.
The bottom ash that cleaned with pure water P is by second hydrocyclone, 260 Separation of Solid and Liquid in second solids-liquid separation step (S100).Equally also be that washings are discharged from top outlet 261 this moment, and bottom ash is discharged from bottom outlet 262.After the bottom ash of discharging from bottom outlet 262 dewaters through the dehydration of second second water smoking (S110) screen cloth 270 once more, can be used as and utilize material to be used again.
In addition, consider that the dissolving water that the top outlet 241 of first hydrocyclone 240 that preferably will be from first solids-liquid separation step (S70) is discharged is recycled to first tank 210 in the first stripping stage (S40) from the angle of waste water reuse; The washings that the top outlet 261 of second hydrocyclone 260 that will be from second solids-liquid separation step (S100) is discharged are recycled to second tank 220 in the second stripping stage (S50), utilize then again.As mentioned above, the dissolving water that uses in the first stripping stage (S40) will enter water treatment stage, water treatment stage comprises the precipitate phase (S210) through settling tank 310 usually, and the filtration stage (S220) through filter press 320 is transported to the waste water treatment plant at last.Precipitate phase (S210) and filtration stage (S220) be those skilled in the art known technology, so detailed.
The present invention is based on the foregoing description and carried out main explanation, but under the prerequisite that does not break away from inventive concept and scope, can carry out other multiple modification and distortion.For example, change the part order in each stage; Append and clean or append or reduce the water smoking etc.; In operation, inject the chemical substance that can not produce appreciable results; Change triangle beater plate shape; And illustrated device has other devices of identical function in utilization and the present embodiment; Or the like, these all are that those skilled in the art implement the change that can derive easily.
According to the muriatic method that contains in the bottom ash of removing of the present invention, the chloride that contains in the bottom ash effectively can be reduced under desired concn or the desired concn.And,, therefore can realize big capacity processing, and have the effect of saving disposal cost owing to finish through successive stages.
The interest field of the invention described above is not limited to description by following claim defined, and the distortion and the change that belong to the claim scope all belong in the scope of the invention.
Claims (13)
1. remove the muriatic method that contains in the bottom ash for one kind, it is characterized by, comprise
To contain muriatic bottom ash and dissolving water mixes, and chloride in the described bottom ash is separated and be dissolved in stripping stage in the dissolving water; And
The solids-liquid separation step that described muriatic dissolving water is separated from bottom ash will be dissolved with.
2. the muriatic method that contains in the bottom ash of removing as claimed in claim 1 is characterized by, and also comprises the pretreatment stage of removing the metallics in the described bottom ash and pulverizing described bottom ash before described dissolution phase.
3. the muriatic method that contains in the bottom ash of removing as claimed in claim 2 is characterized by, and also comprises the wash phase that uses the high pressure pure water to clean described bottom ash after described solids-liquid separation step.
4. as each described muriatic method that contains in the bottom ash of removing in the claim 1 to 3, it is characterized by, the described stripping stage comprises in following three stripping stages at least:
In the first stripping stage, it is fed into described bottom ash in the tank that stores dissolving water, and the irradiation ultrasonic wave is separated the chloride in the bottom ash by cavitation, and is dissolved in the described dissolving water from described bottom ash;
In the second stripping stage, it is fed into described bottom ash in the tank that stores dissolving water, and the water surface of dissolving water is fluctuateed up and down in the interval at bottom ash place, and the chloride in the bottom ash is separated and is dissolved in the described dissolving water; And
In the 3rd stripping stage, it can inject in the air-pressure tube of pressure-air described bottom ash and the common inflow of dissolving water, and the chloride in the bottom ash is separated and is dissolved in the described dissolving water.
5. the muriatic method that contains in the bottom ash of removing as claimed in claim 4, it is characterized by, in the described stripping stage, on the basis in the described first stripping stage, after separate dissolved water and the bottom ash, entered for the second stripping stage and carried out for the second stripping stage, after the second stripping stage, carried out for the 3rd stripping stage thereby make bottom ash and dissolving water enter for the 3rd stripping stage jointly.
6. the muriatic method that contains in the bottom ash of removing as claimed in claim 5 is characterized by, and the dissolving water in the described first stripping stage continuously flows into and flows out described tank.
7. the muriatic method that contains in the bottom ash of removing as claimed in claim 6 is characterized by, and the tank in the described second stripping stage comprises: have the inclination screen cloth of specific mesh, it is used for putting the bottom ash that is injected into; The foreign matter separator tube, it is arranged at described tank top, is used for separating from described bottom ash falling and showy foreign matter; Discharge gutter, it is arranged at the tank bottom surface, is used for discharging to the outside less than the bottom ash of described screen cloth mesh by described screen cloth and diameter; And flow export, it is used for and will moves along described inclination screen cloth and diameter is discharged to the outside greater than the bottom ash of described screen cloth mesh.
8. the muriatic method that contains in the bottom ash of removing as claimed in claim 7, it is characterized by, described air-pressure tube comprises: inner tube, and it is between the lower region that is formed by made from porous material and the upper interval that forms of common imporosity material is formed by connecting, and inner face top possesses the triangle beater plate; And air chamber, form certain space between described air chamber and the described inner tube, and surround described inner tube.
9. remove the muriatic method that contains in the bottom ash for one kind, it is characterized by, comprise:
Lead-in stage with the bottom ash importing;
In the metal separation stage, it elects the metallic screen that contains in the described bottom ash that is imported;
Shredding stage, it will be ground into littler diameter through the described bottom ash after the metal separation;
In the first stripping stage, it continuously flows into described bottom ash input in the first dissolving water that flows out first tank, and the irradiation ultrasonic wave is separated the chloride that contains in the described bottom ash by cavitation, and is dissolved in the described dissolving water from described bottom ash;
The second stripping stage, it is by after the described first stripping stage, with in dewatered bottom ash input second dissolving second tank that water flowed into, make water level fluctuation up and down between the bottom ash location of second tank, the chloride that contains in the bottom ash is separated, and be dissolved in the described dissolving water;
In the 3rd stripping stage, it makes by the bottom ash in the described second stripping stage and the second dissolving water and flows into jointly in the air-pressure tube, injects pressure-air in described air-pressure tube, and the chloride in the bottom ash is separated and is dissolved in the described dissolving water;
First solids-liquid separation step, the bottom ash that it will be by described the 3rd stripping stage and to be dissolved with the muriatic second dissolving water disconnected from each other;
In first water smoking, it is removed moisture from the described bottom ash of separating described first solids-liquid separation step;
Wash phase, it uses the described bottom ash after high-pressure wash water is cleaned described first water smoking;
Second solids-liquid separation step, it will be disconnected from each other by the bottom ash and the washings of described wash phase; And
In second water smoking, it is removed moisture from the described bottom ash of discharging described second solids-liquid separation step.
10. the muriatic method that contains in the bottom ash of removing as claimed in claim 9 is characterized by, and the second dissolving water that will separate in described first solids-liquid separation step is recycled in the first dissolving water in the first stripping stage.
11. the muriatic method that contains in the bottom ash of removing as claimed in claim 10 is characterized by, the washings that will separate in described second solids-liquid separation step are recycled in the second dissolving water in the second stripping stage.
12. a method, it uses bottom ash as cement or filling raw material, and described bottom ash has been removed chloride by each described method of removing in the claim 9 to 11.
13. remove the muriatic system that contains in the bottom ash for one kind, it comprises:
The loading hopper of bottom ash is used to pack into;
Magnetic screening machine, the metallic screen that contains in the described bottom ash of its described loading hopper of will packing into is elected;
Pulverizer, it will be ground into littler diameter by the described bottom ash behind the described magnetic screening machine separating metal;
First tank, its bottom surface is provided with ultrasonic oscillator, by the described bottom ash that ultrasonic irradiation flows into from described pulverizer, makes the chloride that contains in the described bottom ash separate and be dissolved in the dissolving water;
Second tank, it makes the fluctuation up and down between described bottom ash location of its water level, and the chloride that contains in the described bottom ash is separated and is dissolved in the dissolving water; It comprises the inclination screen cloth with specific mesh, is placed with the described bottom ash that injects from described first tank on it; The foreign matter separator tube, it is arranged at top, is used for separating from described bottom ash falling and showy foreign matter; Discharge gutter, it is arranged at the tank bottom surface, is used for discharging to the outside less than the bottom ash of described screen cloth mesh by described screen cloth and diameter; And flow export, it is used for and will moves along described inclination screen cloth and diameter is discharged to the outside greater than the bottom ash of described screen cloth mesh;
Air-pressure tube, it comprises inner tube and air chamber, by pressure-air being injected described inner tube, makes the chloride that contains in the described bottom ash separate and be dissolved in the described dissolving water; Between the lower region that described inner tube is formed by made from porous material and the upper interval that forms of common imporosity material be formed by connecting, its inner face top possesses the triangle beater plate, and the bottom ash of described second tank of flowing through and dissolving water form certain space and surround described inner tube by described inner tube between described air chamber and the described inner tube;
First hydrocyclone, it makes the bottom ash by described air-pressure tube and is dissolved with muriatic dissolving water disconnected from each other;
The first dehydration screen cloth, it removes moisture from the described bottom ash that uses described first hydrocyclone and separated;
Cleaning machine, it uses the high-pressure wash water cleaning to pass through the described bottom ash of the described first dehydration screen cloth;
Second hydrocyclone, it makes by the bottom ash of described cleaning machine and washings disconnected from each other; And
The second dehydration screen cloth, it removes moisture from the described bottom ash that described second hydrocyclone is discharged.
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|---|---|---|---|
| CN200510005154A CN100588473C (en) | 2005-01-28 | 2005-01-28 | Method and system for removing chloride contained in bottom dust |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107073531A (en) * | 2014-09-24 | 2017-08-18 | 太平洋水泥株式会社 | The desalination cement raw material method and device of bottom ash |
| CN110914462A (en) * | 2017-01-27 | 2020-03-24 | 塔泰克生态工业股份公司 | Method and apparatus for washing/cleaning particles from slag and bottom/boiler ash from thermal waste utilization |
| CN112570432A (en) * | 2020-11-16 | 2021-03-30 | 浙江浙能技术研究院有限公司 | Dechlorination method for coal-fired power plant desulfurization wastewater drying ash |
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2005
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107073531A (en) * | 2014-09-24 | 2017-08-18 | 太平洋水泥株式会社 | The desalination cement raw material method and device of bottom ash |
| CN110914462A (en) * | 2017-01-27 | 2020-03-24 | 塔泰克生态工业股份公司 | Method and apparatus for washing/cleaning particles from slag and bottom/boiler ash from thermal waste utilization |
| CN112570432A (en) * | 2020-11-16 | 2021-03-30 | 浙江浙能技术研究院有限公司 | Dechlorination method for coal-fired power plant desulfurization wastewater drying ash |
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