CN102173611A - Process and device for pretreating incineration fly ash - Google Patents
Process and device for pretreating incineration fly ash Download PDFInfo
- Publication number
- CN102173611A CN102173611A CN2011100442427A CN201110044242A CN102173611A CN 102173611 A CN102173611 A CN 102173611A CN 2011100442427 A CN2011100442427 A CN 2011100442427A CN 201110044242 A CN201110044242 A CN 201110044242A CN 102173611 A CN102173611 A CN 102173611A
- Authority
- CN
- China
- Prior art keywords
- water
- washing
- flying dust
- flying
- discharging
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- C04B7/60—Methods for eliminating alkali metals or compounds thereof, e.g. from the raw materials or during the burning process; methods for eliminating other harmful components
-
- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- 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 particularly relates to a process and device for pretreating incineration fly ash as a raw material of cement. The process comprises the following steps of: respectively mixing fly ash and washing water according to the weight ratio of 1:(3-10) in two sets of water washing agitators, removing chloride through water washing, discharging the material, and continuously conveying the water-sludge mixture to the same vacuum filtering and dewatering device for dewatering treatment alternately from top to bottom by using force of gravity, wherein the water content of the dewatered fly ash filter cake is 25-30%, and the content of chloride ions is 0.1-0.6%; implementing further indoor air-drying, wherein the water content of the air-dried fly ash filter cake is 2-15%; and collecting water coming from washing filter cloth of the vacuum filtering and dewatering device and a part of filtering water for circular washing fly ash, and handling the rest waste filtering water as sewage. By using the process provided by the invention, the content of chlorine ions contained in the fly ash can be effectively reduced, so that the fly ash can meet the standards of the raw material used for producing cement. Meanwhile, the process is simple and reasonable and has low energy consumption and high efficiency.
Description
Technical field
The present invention relates to the treatment process and the device technique field of the flying ash that domestic refuse discharges by burning facility, be specifically related to a kind of with flying ash as cement raw material and carry out pretreated technology and device.
Background technology
Along with national urbanization process is constantly accelerated, the domestic waste generation is increasing, at present the main processing mode of domestic waste has three kinds of landfill, compost and burnings, and wherein waste incineration becomes the main processing mode of domestic waste as a kind of rubbish processing to be harmless mode efficiently.But fast development along with the solid waste burning processing, it is more and more to burn the flying dust that produces, the unit of great majority burning at present all is a flying ash of disposing generation voluntarily, situation is very chaotic, great environmental risk and potential safety hazard are arranged, and the handling problem of flying dust has become the bottleneck of restriction incineration treatment of garbage development.
Existing making fly-ash from incineration harmless and safe treatment process mainly contain solidifies stabilization method, wet chemistry method and pyroprocessing method three major types.Solidification and stabilization mainly comprises types such as cement solidification, sequestrant stabilization, compression curing; The wet chemistry method mainly comprises two kinds of formic acid extraction process and carbonation methods; The pyroprocessing method mainly comprises two kinds of sintering curing and melten glassization.Flying dust ultimate demand after curing stabilization method and wet chemistry method are handled enters refuse landfill and carries out landfill, and the heavy metal that wherein contains has the possibility of stripping again, and the percolate waste water of generation needs to handle again; Finally enter in the building materials with the flying dust after the processing of pyroprocessing method, the waste gas that produces in the production process contains a large amount of De dioxin, has increased the cost of waste gas pollution control and treatment.
Siliceous and calcareous facies in the chemical property of flying ash and the cement raw material seemingly, can substitute the part cement raw material, utilize the cement kiln synergic processing flying dust, the dioxin in the flying dust is decomposed under the hot conditions of cement rotary kiln completely, the product behind the cooperative disposal is a cement.Flying ash gets utilization in cement kiln, has avoided the generation of waste gas and waste residue simultaneously, has reduced the cost of waste treatment, has effectively avoided secondary pollution.
Utilize the cement kiln synergic processing flying ash not only to solve the unmanageable problem of flying dust, also saved the raw material of land resources and manufacture of cement simultaneously, realize the resource utilization and the harmlessness disposing of flying dust, but since in the flying ash content of chlorion than higher, directly mix and burn into capable associated treatment cement quality is descended, thereby need carry out pre-treatment to flying dust, make it meet the requirement of manufacture of cement.
Summary of the invention
The present invention aim to provide a kind of can be simply, effectively to carrying out pretreated technology and device technique scheme as the flying ash of cement producting material, reduce the chloride ion content that contains in the flying ash, to overcome problems of the prior art.
A kind of flying ash pretreatment technology is characterized in that:
A) in the two cover washing stirring tanks respectively with flying dust and rinse water according to the mixed of weight ratio 1:3～10, fully stir so that flying dust is washed dechlorination, discharging then, by setup program, another set of beginning charging when wherein a cover washing stirring tank begins discharging, it is identical with the time of finishing charging, washing dechlorination two processes that discharging time is arranged to, circulation successively, two cover washing stirring tanks are alternately finished charging, washing dechlorination, discharging process;
B) described two cover washing stirring tanks replace and rely on gravity that mud mixture is delivered to same vacuum filtering and dewatering device from top to bottom continuously respectively after the discharging to carry out processed, obtain the flying dust filter cake after the dehydration, the water ratio weight percent of gained flying dust filter cake is 25%-30%, and the weight percent of chloride ion content is 0.1%-0.6%;
C) the filter wash cloth water outlet of described vacuum filtering and dewatering device and part are taken off and are used for circulation washing flying dust after filtrate is collected, and all the other take off worry waste water and dispose by sewage;
D) flying dust and the rinse water of described two cover washing stirring tanks adopt quantitative feed mode respectively.
Described a kind of flying ash pretreatment technology, it is characterized in that the charging of described two cover washing stirring tanks, the washing dechlorination, the alternate run program of discharging is: the every interval 15min of each washing stirring tank begins into flying dust and water by the amount of setting, feed time continues 5min, restir washing dechlorination 5min, discharging 10min, another set of beginning charging when wherein a cover begins discharging, start charging behind the first cover discharging 10min, another set of water has been finished charging 5min simultaneously, stir washing 5min and can begin discharging, circulation successively, two cover washing stirring tank alternate run chargings, the washing dechlorination, the discharging program.
Described a kind of flying ash pretreatment technology is characterized in that the quantitative feed mode of described flying dust and rinse water comprises two kinds: the one, realize quantitative feed by control unit capacity and transmission time; The 2nd, realize quantitative feed by the control transmission total amount; Wherein the quantitative feed mode preferred version of flying dust is for being provided with speed governing screw reamer scale between washing stirring tank and flying dust storage vessel, control this speed governing screw reamer scale and transmit, perhaps monitor its accumulative total transmission quantity and realize quantitative feed according to operational throughput and the time set.
Described a kind of flying ash pretreatment technology, it is characterized in that the flying dust filter cake that obtains by vacuum filtering and dewatering device processed further carries out room-dry and handles, the envrionment temperature of air-dry processing is that 15-35 ℃, ambient moisture are 20%-80%, air-dry time is 24h-72h, the water ratio 2%-15% of air-dry back flying dust filter cake is preferably 5%-10%.
A kind of flying ash pretreatment unit, it is characterized in that comprising that two overlap the washing stirring tank that is set up in parallel, the flying dust opening for feed of each washing stirring tank is connected with the airtight transmission of flying dust storage tank by speed governing screw reamer scale respectively, each washing stirring tank outlet is provided with discharge valve respectively, the outlet of each discharge valve is connected with the vacuum filtering and dewatering machine inlet capable pipeline transmission that is arranged on washing stirring tank below respectively, the filter wash cloth water side of vacuum filtering and dewatering machine is connected with middle water pot pipeline, take off leach water end (W.E.) by be provided with T-valve respectively with middle water pot, the sewage storage tank pipeline connects, and middle water pot is connected with the feed-water end difference pipeline of two cover washing stirring tanks.
Described a kind of flying ash pretreatment unit, the flying dust filtered solid outlet end that it is characterized in that described vacuum filtering and dewatering machine connect and conveyor to be set to be used for mechanical transmission flying dust filter cake.
Described a kind of flying ash pretreatment unit, the filter wash cloth water side that it is characterized in that described vacuum filtering and dewatering machine is connected with middle water pot pipeline by filter wash cloth waste water collection device, is equipped with first water pump, first vacuum breaker and the first band under meter gate valve on the connecting pipeline of filter wash cloth waste water collection device and middle water pot; Take off and leach the water end (W.E.) setting and take off the worry waste water collection device, take off on the connecting pipeline of considering between waste water collection device and the T-valve and be equipped with second water pump, second vacuum breaker, be equipped with second on the connecting pipeline of T-valve and sewage storage tank and be with the under meter gate valve; The clear water of middle water pot adds on the connecting pipeline and is equipped with magnetic valve, and on each connecting pipeline of the feed-water end of two cover washing stirring tanks water pump, vacuum breaker, band under meter gate valve is set respectively.
Described a kind of flying ash pretreatment unit is characterized in that being provided with at interval on the agitator arm of described washing stirring tank three secondary or three secondary above stirring rakes, washes on the inwall of stirring tank and is symmetrical arranged one group or two groups of blocks.
Described a kind of flying ash pretreatment unit is characterized in that being equipped with liquidometer on the described middle water pot, and the dewatering outlet, bottom is equipped with gate valve.
Described a kind of flying ash pretreatment unit is characterized in that described sewage storage tank bottom water outlet is equipped with the sewage gate valve.
To carry out pre-treatment by above-mentioned technology as the flying ash of cement producting material, the chloride ion content that can reduce in the flying ash effectively to be contained, make flying ash can meet the raw materials used standard of manufacture of cement, guarantee cement quality, realize the thorough harmless treatment of flying ash, saved land resources and cement producting material; This technology is simple, reasonable simultaneously, energy consumption is low, efficient is high, its charging, washing, dewatering process can be realized automatization control and continuous production running, can significantly enhance productivity, implement once washing and rinse water and fully recycle scheme, under the effect that guarantees the washing dechlorination, improve the utilization ratio of water resources, effectively reduce the pre-treatment production cost.
Description of drawings
Fig. 1 is the structural representation of device of the present invention;
Fig. 2 is the schematic side view of charging in the device of the present invention, washing dechlorination, dehydration dependency structure;
Among the figure: 1-flying dust storage tank, 2-speed governing screw reamer scale, 3-washes stirring tank, the 3a-agitator arm, the 3b-stirring rake, the 3c-block, the 4-discharge valve, 5-vacuum filtering and dewatering machine, 6-flying dust filter cake, the 7-conveyor, 8-takes off the worry waste water collection device, 9-filter wash cloth waste water collection device, 10-first vacuum breaker, 11-first water pump, the 12-first band under meter gate valve, water pot in the middle of the 13-, the 14-liquidometer, the 15-gate valve, the 16-water pump, the 17-vacuum breaker, the 18-sewage storage tank, 19-sewage gate valve, the 20-second band under meter gate valve, 21-band under meter gate valve, 22-second vacuum breaker, 23-second water pump, the 24-magnetic valve, the 25-T-valve.
Embodiment
Now, describe the specific embodiment of the present invention in detail in conjunction with Figure of description:
A kind of flying ash pretreatment technology includes following process:
A) in the two cover washing stirring tanks respectively with flying dust and rinse water according to the mixed of weight ratio 1:3～10, fully stir so that flying dust is washed dechlorination, discharging then, by setup program, another set of beginning charging when wherein a cover washing stirring tank begins discharging, it is identical with the time of finishing charging, washing dechlorination two processes that discharging time is arranged to, circulation successively, two cover washing stirring tanks are alternately finished charging, washing dechlorination, discharging process;
B) described two cover washing stirring tanks replace and rely on gravity that mud mixture is delivered to same vacuum filtering and dewatering device from top to bottom continuously respectively after to carry out processed, obtain the flying dust filter cake after the dehydration, the water ratio weight percent of gained flying dust filter cake is 25%-30%, and the weight percent of chloride ion content is 0.1%-0.6%;
C) the flying dust filter cake that obtains by vacuum filtering and dewatering device processed further carries out the room-dry processing, the envrionment temperature of air-dry processing is that 15-35 ℃, ambient moisture are 20%-80%, air-dry time is 24h-72h, and the water ratio 2%-15% of air-dry back flying dust filter cake is preferably 5%-10%.
D) the filter wash cloth water outlet of described vacuum filtering and dewatering device and part are taken off and are used for circulation washing flying dust after filtrate is collected, and all the other take off worry waste water and dispose by sewage;
E) flying dust and the rinse water of described two cover washing stirring tanks adopt quantitative feed mode respectively, and the quantitative feed mode that is adopted can comprise following two kinds: the one, realize quantitative feed by control unit capacity and transmission time; The 2nd, realize quantitative feed by the control transmission total amount; Wherein the quantitative feed mode preferred version of flying dust is for being provided with speed governing screw reamer scale between washing stirring tank and flying dust storage vessel, control this speed governing screw reamer scale and transmit, perhaps monitor its accumulative total transmission quantity and realize quantitative feed according to operational throughput and the time set.
In above-mentioned each process, charging, washing, discharging, filter dehydration and the water outlet of filter wash cloth are disposed with the collection of taking off filtrate and are all passed through procedure auto-control, two cover alternate run chargings, washing dechlorination, discharging, the vacuum filtering and dewatering device carries out processed from the charging of washing stirring tank continuously, enhances productivity; Every interval 15min begins into flying dust and water by the amount of setting as each washing stirring tank, feed time continues 5min, restir washing 5min, discharging 10min, another set of beginning charging when wherein a cover begins discharging, start charging behind the first cover discharging 10min, another set of water has been finished charging 5min simultaneously, stirring washing 5min can begin discharging, circulation successively, two cover washing stirring tank alternate run chargings, washing dechlorination, discharging program.
Below the flying ash of further fetching with certain burning city domestic garbage factory is that example illustrates this technology, for ease of statement, two cover flying dust storage tanks, speed governing screw reamer scale, washing stirring tank is illustrated as the difference code name with 1#, 2# respectively:
Flying dust source: certain burning city domestic garbage factory circulating fluidized bed flying ash, Cl
-Content be 2.34 wt%, SiO
2, CaO, Fe
2O
3,Al
2O
3Content be respectively 41.35wt%, 18.75wt%, 5.01wt%, 12.7wt%.
Certain flying ash pretreatment technology embodiment 1:
Once wash required flying dust amount according to the washing stirring tank, set speed governing screw reamer scale operational throughput, control total amount or monitoring accumulative total operational throughput control total amount by unit inlet amount and time, once carry the required time to be controlled within 5 minutes; Be stored in the flying dust in the 1# flying dust storage tank, be delivered to the washing stirring tank by 1# speed governing screw reamer scale according to the operational throughput of setting, feed time continues 5 minutes, flying dust and water mix according to the ratio of weight ratio 1:3 in the washing stirring tank, mixed mixed solution fully stirs in 1# washing stirring tank, begin discharging after 5 minutes, through 10 minutes, washing flying dust in the 1# washing stirring tank all is transferred to the vacuum filtering and dewatering device, flying dust filter cake moisture content weight ratio after vacuum filtering and dewatering device filter dehydration is about 25%-30%, and chloride ion content is about 0.5%-0.6%; Part filtered water and whole filter wash cloth water section are collected in relay tank and are used to wash flying dust once more, and the part filtered water is collected the concentrated sewage work that transports in back with sewage storage tank and entrusted processing; It is consistent that 2# flying dust storage tank, 2# speed governing screw reamer scale, the conveying of 2# washing stirring tank flying dust, washing, discharging flow process and aforesaid 1# flying dust storage tank, 1# speed governing screw reamer scale, 1# wash the stirring tank flow process, just two covering devices hocket, control by controller, when 1# washing stirring tank began discharging, 2# washing stirring tank began charging; Flying dust filter cake after the filter dehydration further carries out room-dry to be handled reducing moisture, and the envrionment temperature of air-dry processing is that 30-35 ℃, ambient moisture are 50%-55%, and air-dry time is 24h, and the water ratio of air-dry back flying dust filter cake is 2%-5%; Pretreated flying dust filter cake can satisfy cement kiln to the moisture of going into the kiln material, the requirement of chloride ion content, can directly carry, add by the 2%-7% of cement raw material weight ratio and meet request of national standard through the prepared cement of pretreated flying dust as cement raw material.
Certain flying ash pretreatment technology embodiment 2:
1#, 2# two cover washing stirring tanks are implemented charging, washing, discharging according to the process described in the embodiment 1 respectively, but flying dust and water all mix according to the ratio of weight ratio 1:10, flying dust filter cake moisture content weight ratio after vacuum filtering and dewatering device filter dehydration is about 25%-30%, chloride ion content 0.1%-0.2%; The envrionment temperature that room-dry handle to adopt is that 20-25 ℃, humidity are 55%-60%, and air-dry time is 48h, and the water ratio of air-dry back flying dust filter cake is 6%-10%; Pretreated flying dust filter cake can satisfy cement kiln to the moisture of going into the kiln material, the requirement of chloride ion content, can directly carry, add by the 2%-7% of cement raw material weight ratio and meet request of national standard through the prepared cement of pretreated flying dust as cement raw material.
Certain flying ash pretreatment technology embodiment 3:
1#, 2# two cover washing stirring tanks are implemented charging, washing, discharging according to the process described in the embodiment 1 respectively, but flying dust and water all mix according to the ratio of weight ratio 1:6, flying dust filter cake moisture content weight ratio after vacuum filtering and dewatering device filter dehydration is about 25%-30%, chloride ion content 0.3%-0.4%; The envrionment temperature that room-dry handle to adopt is that 15-20 ℃, humidity are 60%-65%, air-dry time is 72h, the water ratio of air-dry back flying dust filter cake is 8%-12%, pretreated flying dust filter cake can satisfy cement kiln to the moisture of going into the kiln material, the requirement of chloride ion content, can directly carry, add by the 2%-7% of cement raw material weight ratio and meet request of national standard through the prepared cement of pretreated flying dust as cement raw material.
A kind of flying ash pretreatment unit, as shown in Figure 1 and Figure 2, comprise the washing stirring tank 3 that two covers are set up in parallel, three secondary or three secondary above stirring rake 3b are set respectively on its agitator arm 3a at interval, be symmetrical arranged one group or two groups of block 3c on the inwall respectively, be three secondary stirring rake 3b, one group of block 3c shown in the figure, can realize fully stirring strengthening and wash effect.The flying dust opening for feed of each washing stirring tank 3 is connected with the 1 airtight transmission of flying dust storage tank by speed governing screw reamer scale 2 respectively, speed governing screw reamer scale 2 is a kind of microcomputer control metering outfits, cooperate by sealing helical feed tube and spiral measurement structure, weight sensor to constitute, can realize the quantitatively control of transmission its unit operational throughput, transmission speed, transmission time; Also can carry total amount, when carrying total amount to reach set(ting)value, just stop 2 chargings of speed governing screw reamer scale to realize quantitative transmission by the sensor output signal monitoring; As adopt the SES-2 series of Huaneng Group, Hangzhou handling equipment Manufacturing Co., Ltd, by being connected, can realize regularly transmitting by the transmission quantity of setting to the washing stirring tank from the flying dust storage tank with controller.Each is washed, and stirring tank 3 outlets are provided with respectively and the discharge valve 4 of controller control linkage, can set discharging flow and control it by setting timing open and close at interval; The outlet of each discharge valve 4 is connected with the vacuum filtering and dewatering machine 5 opening for feed pipelines transmission that is arranged on washing stirring tank 3 belows respectively, to realize that two cover washing stirring tanks alternately are same vacuum filtering and dewatering machine 5 feed, to satisfy vacuum filtering and dewatering machine 5 needs of operation continuously, enhance productivity; In the present invention simultaneously, utilize rational difference of altitude between washing stirring tank 3 discharge ports and vacuum filtering and dewatering machine 5 opening for feeds, make the mud mixture in the washing stirring tank 3 rely on gravity to be delivered to vacuum filtering and dewatering machine 5 from top to bottom continuously, substitute the conventional means of traditional employing pump delivery mud mixture, directly avoided pump wear and tear needed production shut-down and maintenance of the equipment.The flying dust filtered solid outlet end connection of vacuum filtering and dewatering machine 5 is provided with conveyor 7 and is used for mechanical transmission flying dust filter cake 6 to the water ratio of room-dry place with further reduction filter cake, makes it satisfy cement kiln for the moisture requirement of going into the kiln material, guarantees cement quality.Taking off of vacuum filtering and dewatering machine 5 is used to wash flying dust with the clear water mixed cycle after filter waste water enters middle water pot 13 according to certain ratio part, and another part is directly as sewage disposal; 5 operation for some time of vacuum filtering and dewatering machine need be with flushing with clean water to guarantee the cleaning and the permeability of filter cloth, water pot 13 mixed the back circulation and is used to wash flying dust in the middle of waste water after the filter wash cloth all entered with clear water, to improve the utilization ratio of water resources, filter wash cloth water side at vacuum filtering and dewatering machine 5 is connected with middle water pot 13 pipelines by filter wash cloth waste water collection device 9, is equipped with first water pump 11, first vacuum breaker 10 and the first band under meter gate valve 12 on the connecting pipeline of filter wash cloth waste water collection device 9 and middle water pot 13; Take off and leach the water end (W.E.) setting and take off and consider waste water collection device 8, taking off worry waste water collection device 8 is connected with middle water pot 13, sewage storage tank 18 pipelines respectively by T-valve 25, take off on the connecting pipeline of considering between waste water collection device 8 and the T-valve 25 and be equipped with second water pump 23, second vacuum breaker 22, be equipped with second on the connecting pipeline of T-valve 25 and sewage storage tank 18 and be with under meter gate valve 20; The clear water of middle water pot 13 adds on the connecting pipeline and is equipped with magnetic valve 24, and on each connecting pipeline of the feed-water end of two cover washing stirring tanks 3 water pump 16, vacuum breaker 17, band under meter gate valve 21 is set respectively.Be equipped with liquidometer 14, dewatering outlet, bottom in the middle of described on the water pot 13 and be equipped with gate valve 15 in order to cooperate the water level in the water pot 13 in the middle of the control, described sewage storage tank 18 bottom water outlets are equipped with the discharging of sewage gate valve 19 in order to waste water in the controlling tank.Described each water pump and corresponding vacuum breaker and band under meter gate valve, up and down liquidometer, battery valve respectively with the controller control linkage, carry clear water, take off filtrate, the water outlet of filter wash cloth to middle water pot 13 by the requirement of setting, the highest and the minimum liquid level of water pot 13 in the middle of the control, and carry rinse water from middle water pot 13 to two cover washing stirring tanks at regular time and quantity; Take off filtrate to be collected in sewage storage tank 18 temporary unnecessary, treat that a certain amount of back is concentrated to transport sewage work or adopt alternate manner to dispose qualified discharging; Press filtration waste water part cyclically utilizing with vacuum filtering and dewatering machine 5 of the present invention, filter wash cloth waste water fully recovering when guaranteeing washing flying dust effect, can reduce the technology water loss, reduces the sewage disposal expense.
Adopt technology of the present invention and corresponding device thereof to carrying out pre-treatment as the flying ash of cement raw material, per hour can handle about 3 tons of flying ash, the processed in units cost is greatly about below 800 yuan/ton; Wherein the primary sample flying dust is through after the washing of flying dust pretreatment system, and chloride ion content obtains the decline of very big degree, as a result shown in the table 1:
Table 1: chlorion and main component content synopsis before and after the flying ash washing:
Flying ash is by mixing cement kiln with the weight ratio of cement raw material 3% after technology of the present invention and the device pre-treatment, obtained cement be who knows analyze, concrete data such as table 2, as can be seen, every index fluctuation of cement clinker is very little, and every index is within zone of reasonableness.
Table 2: cement clinker analysis of control table
| The flying dust adding proportion | Loss | SiO 2 | Al 2O 3 | Fe 2O 3 | CaO | MgO | Σ | KH | N | P | FCaO | KH - |
| 0% | 0.69 | 22.18 | 5.01 | 3.46 | 65.90 | 1.21 | 98.83 | 0.909 | 2.62 | 1.45 | 0.83 | 0.895 |
| 3% | 0.63 | 22.60 | 4.91 | 3.41 | 65.42 | 1.12 | 98.49 | 0.887 | 2.69 | 1.44 | 1.05 | 0.870 |
Claims (10)
1. flying ash pretreatment technology is characterized in that:
A) in the two cover washing stirring tanks respectively with flying dust and rinse water according to the mixed of weight ratio 1:3～10, fully stir so that flying dust is washed dechlorination, discharging then, by setup program, another set of beginning charging when wherein a cover washing stirring tank begins discharging, it is identical with the time of finishing charging, washing dechlorination two processes that discharging time is arranged to, circulation successively, two cover washing stirring tanks are alternately finished charging, washing dechlorination, discharging process;
B) described two cover washing stirring tanks replace and rely on gravity that mud mixture is delivered to same vacuum filtering and dewatering device from top to bottom continuously respectively after the discharging to carry out processed, obtain the flying dust filter cake after the dehydration, the water ratio weight percent of gained flying dust filter cake is 25%-30%, and the weight percent of chloride ion content is 0.1%-0.6%;
C) the filter wash cloth water outlet of described vacuum filtering and dewatering device and part are taken off and are used for circulation washing flying dust after filtrate is collected, and all the other take off worry waste water and dispose by sewage;
D) flying dust and the rinse water of described two cover washing stirring tanks adopt quantitative feed mode respectively.
2. a kind of flying ash pretreatment technology as claimed in claim 1, it is characterized in that the charging of described two cover washing stirring tanks, the washing dechlorination, the alternate run program of discharging is: the every interval 15min of each washing stirring tank begins into flying dust and water by the amount of setting, feed time continues 5min, restir washing dechlorination 5min, discharging 10min, another set of beginning charging when wherein a cover begins discharging, start charging behind the first cover discharging 10min, another set of washing stirring tank has been finished charging 5min simultaneously, stir washing dechlorination 5min and can begin discharging, circulation successively, two cover washing stirring tank alternate run chargings, the washing dechlorination, the discharging program.
3. a kind of flying ash pretreatment technology as claimed in claim 1 is characterized in that the quantitative feed mode of described flying dust and rinse water comprises two kinds: the one, realize quantitative feed by control unit capacity and transmission time; The 2nd, realize quantitative feed by the control transmission total amount; Wherein the quantitative feed mode preferred version of flying dust is for being provided with speed governing screw reamer scale between washing stirring tank and flying dust storage vessel, control this speed governing screw reamer scale and transmit, perhaps monitor its accumulative total transmission quantity and realize quantitative feed according to operational throughput and the time set.
4. a kind of flying ash pretreatment technology as claimed in claim 1, it is characterized in that the flying dust filter cake that obtains by vacuum filtering and dewatering device processed further carries out room-dry and handles, the envrionment temperature of air-dry processing is that 15-35 ℃, ambient moisture are 20%-80%, air-dry time is 24h-72h, the water ratio 2%-15% of air-dry back flying dust filter cake is preferably 5%-10%.
5. flying ash pretreatment unit, it is characterized in that comprising that two overlap the washing stirring tank (3) that is set up in parallel, the flying dust opening for feed of each washing stirring tank (3) is connected with the airtight transmission of flying dust storage tank (1) by speed governing screw reamer scale (2) respectively, each washing stirring tank (3) outlet is provided with discharge valve (4) respectively, the outlet of each discharge valve (4) is connected with vacuum filtering and dewatering machine (5) the opening for feed pipeline transmission that is arranged on washing stirring tank (3) below respectively, the filter wash cloth water side of vacuum filtering and dewatering machine (5) is connected with middle water pot (13) pipeline, take off leach water end (W.E.) by be provided with T-valve (25) respectively with middle water pot (13), sewage storage tank (18) pipeline connects, and middle water pot (13) is connected with the feed-water end difference pipeline of two cover washing stirring tanks (3).
6. a kind of flying ash pretreatment unit as claimed in claim 5, the flying dust filtered solid outlet end that it is characterized in that described vacuum filtering and dewatering machine (5) connect and conveyor (7) to be set to be used for mechanical transmission flying dust filter cake (6).
7. a kind of flying ash pretreatment unit as claimed in claim 5, the filter wash cloth water side that it is characterized in that described vacuum filtering and dewatering machine (5) is connected with middle water pot (13) pipeline by filter wash cloth waste water collection device (9), is equipped with first water pump (11), first vacuum breaker (10) and the first band under meter gate valve (12) on the connecting pipeline of filter wash cloth waste water collection device (9) and middle water pot (13); Take off and leach the water end (W.E.) setting and take off and consider waste water collection device (8), take off on the connecting pipeline of considering between waste water collection device (8) and the T-valve (25) and be equipped with second water pump (23), second vacuum breaker (22), be equipped with second on the connecting pipeline of T-valve (25) and sewage storage tank (18) and be with under meter gate valve (20); The clear water of middle water pot (13) adds on the connecting pipeline and is equipped with magnetic valve (24), and on each connecting pipeline of the feed-water end of two cover washing stirring tanks (3) water pump (16), vacuum breaker (17), band under meter gate valve (21) is set respectively.
8. a kind of flying ash pretreatment unit as claimed in claim 5, the agitator arm (3a) that it is characterized in that described washing stirring tank (3) upward is provided with three secondary or three secondary above stirring rakes (3b) at interval, is symmetrical arranged one group or two groups of blocks (3c) on the inwall of washing stirring tank (3).
9. a kind of flying ash pretreatment unit as claimed in claim 5 is characterized in that being equipped with liquidometer (14) on the described middle water pot (13), and the dewatering outlet, bottom is equipped with gate valve (15).
10. a kind of flying ash pretreatment unit as claimed in claim 5 is characterized in that described sewage storage tank (18) bottom water outlet is equipped with sewage gate valve (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100442427A CN102173611B (en) | 2011-02-24 | 2011-02-24 | Process and device for pretreating incineration fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100442427A CN102173611B (en) | 2011-02-24 | 2011-02-24 | Process and device for pretreating incineration fly ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102173611A true CN102173611A (en) | 2011-09-07 |
| CN102173611B CN102173611B (en) | 2013-04-03 |
Family
ID=44516909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100442427A Active CN102173611B (en) | 2011-02-24 | 2011-02-24 | Process and device for pretreating incineration fly ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102173611B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016598A (en) * | 2014-06-20 | 2014-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Dechlorination method of titanium extraction tailings |
| CN105753345A (en) * | 2016-02-22 | 2016-07-13 | 湖州森诺膜技术工程有限公司 | Flying ash desalination and water washing device |
| CN113003964A (en) * | 2021-02-22 | 2021-06-22 | 上海波赛统环境科技有限公司 | Continuous washing dechlorination device for waste incineration fly ash |
| CN114733889A (en) * | 2022-04-07 | 2022-07-12 | 深圳市小荷环保技术有限公司 | Waste incineration fly ash washing device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255991A (en) * | 2008-01-09 | 2008-09-03 | 光大环保工程技术(深圳)有限公司 | System and method for innocent treatment of garbage flying ash |
| CN101461991A (en) * | 2008-07-16 | 2009-06-24 | 上海市固体废物处置中心 | Device and method for pretreatment of refuse burning flyash by wet method |
| CN201439512U (en) * | 2009-07-16 | 2010-04-21 | 太平洋水泥株式会社 | Treatment device for incinerating |
| CN101773924A (en) * | 2010-01-29 | 2010-07-14 | 清华大学 | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent |
-
2011
- 2011-02-24 CN CN2011100442427A patent/CN102173611B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255991A (en) * | 2008-01-09 | 2008-09-03 | 光大环保工程技术(深圳)有限公司 | System and method for innocent treatment of garbage flying ash |
| CN101461991A (en) * | 2008-07-16 | 2009-06-24 | 上海市固体废物处置中心 | Device and method for pretreatment of refuse burning flyash by wet method |
| CN201439512U (en) * | 2009-07-16 | 2010-04-21 | 太平洋水泥株式会社 | Treatment device for incinerating |
| CN101773924A (en) * | 2010-01-29 | 2010-07-14 | 清华大学 | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent |
Non-Patent Citations (1)
| Title |
|---|
| 《水泥技术》 20031231 施惠生等 利用城市垃圾焚烧飞灰开发新型生态水泥混合材料 第8-12页 1-10 , 第6期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016598A (en) * | 2014-06-20 | 2014-09-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Dechlorination method of titanium extraction tailings |
| CN105753345A (en) * | 2016-02-22 | 2016-07-13 | 湖州森诺膜技术工程有限公司 | Flying ash desalination and water washing device |
| CN105753345B (en) * | 2016-02-22 | 2017-10-20 | 湖州森诺环境科技有限公司 | A kind of flying dust desalination water washing device |
| CN113003964A (en) * | 2021-02-22 | 2021-06-22 | 上海波赛统环境科技有限公司 | Continuous washing dechlorination device for waste incineration fly ash |
| CN114733889A (en) * | 2022-04-07 | 2022-07-12 | 深圳市小荷环保技术有限公司 | Waste incineration fly ash washing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102173611B (en) | 2013-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101817650B (en) | Method for treating incinerated fly ash of domestic garbage with cooperation of cement kiln | |
| CN101773924B (en) | Cooperatively preprocessing method of solid waste incineration flying ash cement kiln of returned effluent | |
| CN102320763B (en) | Phosphogypsum purification and neutralization apparatus | |
| CN101758061A (en) | Method for pretreating fly ash of domestic refuse incineration through cooperative disposal of cement kilns | |
| CN203862376U (en) | Gravel washing, recovering and dewatering all-in-one machine | |
| CN212524526U (en) | Engineering spoil tail slurry water environmental protection processing system | |
| CN102173611B (en) | Process and device for pretreating incineration fly ash | |
| CN110238157A (en) | A kind of method and system of the dechlorination of flying dust depth and recycling modification | |
| CN102963920B (en) | Method for purifying glauberite to prepare dihydrate gypsum | |
| CN100537723C (en) | A kind of technology of producing acetylene gas by dry method | |
| CN110950520A (en) | Multiphase solid waste treatment method | |
| CN104530243A (en) | Tapioca starch clean production method | |
| CN101423203A (en) | Water-saving and emission-reducing wet method phosphoric acid manufacture process | |
| CN108117286B (en) | Washing and desalting system and method for waste incineration fly ash or kiln ash | |
| CN113716822A (en) | Sludge wall breaking and ultrahigh pressure squeezer combined sludge dewatering process and system | |
| CN1887765A (en) | Dry cement clinker producing process with carbide residue to replace limy material | |
| CN216972356U (en) | Multistage washing integrated system of flying dust | |
| CN116283094A (en) | Cooperative treatment method and system for waste incineration fly ash and silicon-rich waste | |
| CN215049699U (en) | Domestic waste incineration fly ash water desalination system | |
| CN115625181A (en) | Phosphogypsum harmless treatment system | |
| CN104003634B (en) | The technique of a kind of cement clinker production line cooperative disposal shell discarded object and processing system | |
| CN209009685U (en) | A kind of petroleum coke closed conveying dewatering cycle processing unit of delayed coking | |
| CN203833829U (en) | Processing system for co-processing shellfish wastes in cement clinker production line | |
| CN204151211U (en) | A kind of mud is used for the ridge grain seeding treatment system of dry-process rotary kiln | |
| CN217709204U (en) | Automatic intelligent comprehensive salt mud treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170124 Address after: 310012 room A05, building 1, No. 39, Yue Yue Road, Hangzhou, Zhejiang, 15, China Patentee after: HANGZHOU YIHUI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 310012 room 15A-05, blue ocean era International Building, No. 39 Yue Yi Road, Zhejiang, Hangzhou, China Patentee before: Zheng Hui |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20230419 Address after: 316000 No. 25, Yandun Industrial Zone, Cengang street, Dinghai District, Zhoushan City, Zhejiang Province Patentee after: ZHOUSHAN NAHAI SOLID WASTE CENTRAL DISPOSAL Co.,Ltd. Address before: Room A05, 15th Floor, Building 1, No. 39 Yile Road, Xihu District, Hangzhou City, Zhejiang Province, 310012 Patentee before: HANGZHOU YIHUI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |