CN103272433A - Treatment for filtering and purifying siliceous powder waste water - Google Patents
Treatment for filtering and purifying siliceous powder waste water Download PDFInfo
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- CN103272433A CN103272433A CN201210482468XA CN201210482468A CN103272433A CN 103272433 A CN103272433 A CN 103272433A CN 201210482468X A CN201210482468X A CN 201210482468XA CN 201210482468 A CN201210482468 A CN 201210482468A CN 103272433 A CN103272433 A CN 103272433A
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- filter
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- perlite
- diatomite
- silica flour
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Abstract
The invention is a treatment for filtering and purifying siliceous powder waste water, which is a treatment method for press filtration and purification of siliceous waste water using a van-type filter press by adding perlite or diatomite flocculating agent. The system is a filtration system which is composed of a van-type filter press set, a slag slurry pump, a perlite or diatomite clear water mixing box and a mixer. The main process step comprises: adding perlite or diatomite into a clear water mixing box, fully mixing perlite or diatomite in clear water stirred by mixer, adding perlite or diatomite mixed water into a van-type filter press by the slag slurry pump, forming a perlite or diatomite filter membrane on the filter press filter cloth, and switching siliceous powder waste water to a van-type filter press for continuously filtering. The invention is used for filtering and treating siliceous powder waste water, and the filtering treatment amount is large and the water quality good is good, and the water after treatment can be reused for production and can be discharged directly without environment influence.
Description
Technical field
The present invention relates to a kind of filtration, purification processing method that contains silica flour waste water, be particularly suitable for handling the purified treatment of granule slag inclusion waste water, belong to the purification of waste water process field.
Background technology
Production process at polysilicon, cut silicon rod with the sawing of silicon core, can produce a large amount of silica flours in the cutting process, wherein silicon particle size does not wait at 0.12 μ m～1mm usually, and conventional filter cloth can only filter greatly about 1 μ m left and right sides powder, and this has just caused filter cloth can't filter silicon-containing wastewater effectively.Because it is less to contain in the silica flour waste water silicon particle size, silica flour can't be mixed with water according to original design and effectively to separate, the water turbidity of processing is higher, can't proceed reuse, does not satisfy the present situation of silicon rod cutting water requirement.
The method that contains silica flour waste water that existing conventional treatment silicon core cutting produces mainly is to add a kind of composition flocculant, makes the silicon powder particle flocculation separation, but required on the high side with flocculant, and inconvenient pressurized treatments behind the flocculation and delamination; Another kind of mode is directly to efflux, though fast simple, the waste water of discharging contains a large amount of silicon powder particles, and is very big to ambient influnence.
Summary of the invention
Purpose of the present invention: for overcoming the shortcoming of prior art; provide a kind of filtration, purification to contain the method for silica flour waste water; adopt this method to handle and contain silica flour waste water; can from contain silica flour waste water, silica flour be separated fully; the filter cloth preliminary filming time is short, treating capacity is big, water quality is good; the safety and stability of system own solves separation problem, and environment is played a very good protection.
The filtration, purification processing method that the present invention contains silica flour waste water is characterized in that: the filtration, purification treatment system is made of chamber-type press filter (4), slag stock pump, perlite or diatomite clear water blending bin (1), filtered water tank (7), filter (9), mixer (5), and processing step comprises:
1) adds the ratio of perlite or diatomite in powder 0.05Kg～0.15Kg in every cubic metre of clear water, adsorbent perlite or diatomite are added in the clear water blending bin (1), stir by mixer (5), perlite or diatomite fully are blended in the clear water, form suspension perlite or diatomite mixing water;
2) be fixed on the filter plate filter cloth (3) is smooth earlier, open chamber-type press filter (4) and compress filter plate; By the first slag stock pump (2-1), suspension perlite in the blending bin (1) or diatomite mixing water are driven into chamber-type press filter (4), make suspension perlite or diatomite mixing water by chamber-type press filter (4) filter plate, filter cloth (3) at filter plate is pre-formed filter membrane, form 5～30 fens clock times of filter membrane process need, filter cloth adopts terylene 250～80 orders; The backwater that produces in the pre-membrane shaping process is back in perlite or the diatomite clear water blending bin (1) by pipeline, recycles;
3) after pre-film formation is finished, horse back switch valve switch, close the delivery port of carrying suspension perlite or diatomite mixed water conduit, open the delivery port that another contains the silica flour waste pipe, the silica flour waste water of intending handling that contains is driven in the chamber-type press filter (4) by the second slag stock pump (2-2), the second slag stock pump (2-2) is squeezed into and is contained the silica flour wastewater flow from large to small, and through filtration in 3～8 hours, the hydraulic cylinder pressure during chamber-type press filter (4) work was in 10 Mpa～40 MPa scopes;
4) clear water after the filtration treatment is directly sent into filtered water tank (7) and is stored, squeeze into filter (9) by reuse water pump (8) after, be delivered directly to the storage of machining equipment recycle-water place or efflux;
5) filter plate of opening installation in chamber-type press filter (4) unloads filter cloth (3), and the silica flour after filtering out behind artificial or mechanical removal, is reinstalled in filter plate in the chamber-type press filter (4), and filter cloth (3) continues to reuse.
Perlite or diatomite adsorbant: 70～325 orders.
Be the main inlet opening of filter plate (10) in the middle of the filter plate of installing in the chamber-type press filter, be uniform-distribution with four apopores (11) around the filter plate, have two apertures (12) on the inwall of apopore (11), silicon-containing wastewater enters through filter cloth from water inlet (10) and filters, flow out from apopore (11), the aperture (12) that passes through again simultaneously on the apopore (11) repeats to circulate in filter plate, reaches secondary filter; After filter press is used to complete, when filter cloth cleans, feed compressed air earlier from the filter plate both sides filter cloth on the whole filter plate is carried out blowback, make the silica flour that adheres on the filter cloth moisture that volatilizees fast, silicon powder deposit is filter cake shape, minimizing runs into behind the air heating and spontaneous combustion and environment is produced pollutes because silica flour is moisture, filter cake adopts automatic panel-turnover to connect the slag structure or the mode of manually rooting out is eliminated.
Operation principle of the present invention is: the perlite of employing or diatomite adsorbant are through being pumped to filter press, when pump pressure reaches authorized pressure 0.4MPa～0.5MPa, perlite or diatomite can well be adsorbed on the filter cloth, when filtering siliceous powder waste water, silica flour in the waste water can be adsorbed again by perlite or diatomite, constantly cohesion, thereby reach the purpose of effective filtration, while is along with the continuous absorption of silica flour, form new filter course, the new filtering layer that utilizes oarse-grained silica flour to form again little silicon powder particle effectively filters, and waste water is fully filtered, and reaches instructions for use.Rely on perlite or diatomaceous strong adsorptivity to make it as adsorbent, to be furnished with one deck filtration membrane that perlite or diatomaceous water form after by canvas press cloth surface press filtration by the slag stock pump, feeding contains the silica flour that will contain in the silica flour waste water behind the silica flour waste water and effectively separates, and reaches the purification of water quality purpose.
Adopt the inventive method to handle silicon-containing wastewater; can from contain silica flour waste water, silica flour be separated fully; the filter cloth preliminary filming time is short, the cycle of operation is long, treating capacity is big, purification of water quality is good, the safety and stability of system own, and equipment operation and simple in structure plays a very good protection to environment.
Description of drawings
Below in conjunction with the accompanying drawing illustrated embodiment, structure is described further, but protection domain of the present invention is not limited thereto embodiment.
Fig. 1 is each parts annexation schematic diagram of technology of the present invention.
Fig. 2 is the FB(flow block) of technology of the present invention.
Fig. 3 is installed in filter-plate structure schematic diagram in the chamber-type press filter for the present invention.
The silica flour that Fig. 4 is press-filtered out after handling for the present invention.
Fig. 5 contains the waste water of silica flour before handling for the present invention.
The recycle-water of Fig. 6 for handling through the present invention.
Number in the figure: (1) perlite or the blending bin of diatomite clear water; (2-1) the first slag stock pump; (2-2) the second slag stock pump; (3) filter plate filter cloth; (4) chamber-type press filter; (5) mixer; (6) silicon-containing wastewater collecting pit; (7) filtered water tank; (8) reuse water pump; (9) clear water reuse front filter; (10) inlet opening; (11) apopore (12) aperture.
The specific embodiment
As shown in Figure 1, earlier with filter cloth 3 smooth being fixed on the filter plate, opening chamber-type press filter 4 and compress filter plate.
In perlite or diatomite clear water blending bin 1, utilize 5 pairs of perlites of mixer or diatomite to mix in proportion with clear water, obtain mixing water, mixing water is sent to chamber-type press filter 4 by the first slag stock pump 2-1, be allowed to condition at and be pre-formed one deck filter membrane on the filter plate filter cloth 3, be i.e. pre-film.The backwater that produces in the pre-membrane shaping process is back in perlite or the diatomite clear water blending bin 1 by pipeline, recycles, and can not cause new pollution.
When pre-film finish (preliminary filming time: 5～30min), close and mix the water route, silicon-containing wastewater 6 is sent into chamber-type press filter 4 by the second slag stock pump 2-2 carries out filtration, purification and handle;
Directly sending into filtered water tank 7 by the clear water after chamber-type press filter 4 processing stores;
After clear water after the processing was squeezed into filter 9 by reuse water pump 8, the machine that directly is delivered to added with water spot or effluxes.
Embodiment 1:
Filter press filter area: 15～30 ㎡; Filter press hydraulic cylinder pressure: 20 Mpa, continuity along with the working time, along with attachment on the filter cloth increases, filter press hydraulic cylinder pressure can slowly raise, be advisable not to be higher than 28MPa, if hydraulic cylinder pressure greater than 28MPa after, if work on, because filter cloth has blocked tendency, hydraulic cylinder has moment to produce high pressure, causes the hidden danger of device security accident.Therefore, should note monitoring filter press hydraulic cylinder pressure (being advisable not to be higher than 28MPa) at work; Disposal ability: maximum throughput was handled 30m3(in 3 hours because this method is handled silicon-containing wastewater, the flow size is a progressive formation from large to small, in the regular hour, only to see the total amount of processing, and can not get an invariable flow) flow maximum of preceding 3 hours of each cycle, diminish gradually later on, though the water quality effect of handling is fine, treating capacity is limited by system capability.The long process time in each cycle was more than 9 hours.Preliminary filming time 5～30 minutes, pure water consumption: 10m3, perlite or diatomite consumption 0.5～1.5kg.
Index analysis before and after handling:
Employed equipment
1, slag stock pump (flow: 12m
3/ h lift: 43m power: 3.5kw)
2, chamber-type press filter (unit type: XAYF30/800-UB; Filter area: 30m
229 of filter plate: PP; Filter cloth: terylene 250～120 orders)
The chamber-type press filter design feature is as follows:
A, chamber-type press filter body construction, adopted compressed air to feed compressed air from the filter plate both sides whole filter plate has been carried out blowback, make that moisture volatilizees fast between silica flour, the filter cake deposition, reduced simultaneously and run into the influence that heating and spontaneous combustion produce environment behind the air because silica flour is moisture, equipment has adopted automatic panel-turnover to connect the mode of slag, reduces artificial workload.
The design feature of B, filter plate
The structure of the filter plate that this scheme adopts is as follows:
Be the main water inlet of filter plate in the middle of the filter plate, be uniform-distribution with four apopores (11) around the filter plate, have two apertures (12) on the inwall of apopore, containing silica flour waste water enters through filter cloth from water inlet (10) and filters, flow out from apopore (11), the aperture (12) that passes through again simultaneously on the apopore (11) repeats to circulate in filter plate, reaches secondary filter.(see figure 3)
3, filtered water tank: 1.26 * 1.26 * 1.27 2m
3
4, perlite or diatomite adsorbant: 70-325 order
5, wastewater disposal basin: 1.5 * 2.5 * 4 13m
3Reinforced Concrete Structure
6, sedimentation basin: 3 * 2.5 * 4 30m
3Reinforced Concrete Structure
7, clear water container:
Size: diameter (D) * height (H)=φ 2.5 * 3m
Dischargeable capacity: 13.5m
3
Hydraulic detention time (HRT): 1.1h
The fiberglass material, ground type
8, reuse water pump
Model: IS50-32-200 flow: Q=15m
3/ h lift: 35m
Power: N=3kw
If newly-built silicon-containing wastewater treatment system of the present invention gross investment: about 1,090,000; 330 days whole year operation time, cut 8 of silicon rods every day, move 10h every day.Following table is basis:
| Project | Quantity | Remarks |
| The machining equipment water consumption | 120m 3/ day | |
| The whole year operation time | 330 days | |
| The commercial power cost | 0.42 unit/kw | |
| The cost of desalted |
10 yuan/m 3 | |
| Cost of labor | 4000 yuan/month |
Annual water consumption is about: 120 * 330=39600m
3, annual water cost is: 39600 * 10=396000 unit;
Be about with electric cost the whole year: 6.5 * 10 * 330 * 0.42=9009 unit;
Annual cost of labor: 4000 * 12=48000 unit;
Annual with equipment and spare part and medicament: 10000 yuan;
After utilizing this cover system, cooling water can recycle, and annual cost-savedly is:
396000-9009-48000-10000=328991 unit.Estimate to come into operation back 4 years recoverable costs of investment.
After the present invention handles, be adsorbed on and be press-filtered out silica flour on the filter plate in order to alleviate artificial removing, can feed compressed air earlier from the back side, filter plate both sides the filter cloth on the monoblock filter plate is carried out blowback, allow the positive accompanying interior moisture of silica flour of monoblock filter cloth volatilize fast, form block deposition filter cake, reducing moisture silica flour runs into behind the air heating and spontaneous combustion and environment is produced pollutes, manually root out again or adopt the automatic panel-turnover mode to connect slag, alleviate workload.
The present invention solves and to contain that silica flour waste water can't be handled and the problem of pure water reuse, and has formulated relevant technological procedure.Design, process, disposed relevant device, built up a cover complete contain the silica flour Waste Water Treatment.The technological process that this project adopts is rationally feasible, cost-effective, has broad application prospects.
Claims (3)
1. filtration, purification processing method that contains silica flour waste water, it is characterized in that the filtration, purification treatment system is made of chamber-type press filter (4), slag stock pump, perlite or diatomite clear water blending bin (1), filtered water tank (7), filter (9), mixer (5), processing step comprises:
1) adds the ratio of perlite or diatomite in powder 0.05Kg～0.15Kg in every cubic metre of clear water, adsorbent perlite or diatomite are added in the clear water blending bin (1), stir by mixer (5), perlite or diatomite fully are blended in the clear water, form suspension perlite or diatomite mixing water;
2) be fixed on the filter plate filter cloth (3) is smooth earlier, open chamber-type press filter (4) and compress filter plate; By the first slag stock pump (2-1), suspension perlite in the blending bin (1) or diatomite mixing water are driven into chamber-type press filter (4), make suspension perlite or diatomite mixing water by chamber-type press filter (4) filter plate, filter cloth (3) at filter plate is pre-formed filter membrane, form 5～30 fens clock times of filter membrane process need, filter cloth adopts terylene 250～80 orders; The backwater that produces in the pre-membrane shaping process is back in perlite or the diatomite clear water blending bin (1) by pipeline, recycles;
3) after pre-film formation is finished, horse back switch valve switch, close the delivery port of carrying suspension perlite or diatomite mixed water conduit, open the delivery port that another contains the silica flour waste pipe, the silica flour waste water of intending handling that contains is driven in the chamber-type press filter (4) by the second slag stock pump (2-2), the second slag stock pump (2-2) is squeezed into and is contained the silica flour wastewater flow from large to small, and through filtration in 3～8 hours, the hydraulic cylinder pressure during chamber-type press filter (4) work was in 10 Mpa～40 MPa scopes;
4) clear water after the filtration treatment is directly sent into filtered water tank (7) and is stored, squeeze into filter (9) by reuse water pump (8) after, be delivered directly to the storage of machining equipment recycle-water place or efflux;
5) filter plate of opening installation in chamber-type press filter (4) unloads filter cloth (3), and the silica flour after filtering out behind artificial or mechanical removal, is reinstalled in filter plate in the chamber-type press filter (4), and filter cloth (3) continues to reuse.
2. the filtration, purification processing method that contains silica flour waste water according to claim 1 is characterized in that perlite or diatomite adsorbant: 70～325 orders.
3. the filtration, purification processing method that contains silica flour waste water according to claim 1, it is characterized in that: be the main inlet opening of filter plate (10) in the middle of the filter plate of installing in the chamber-type press filter, be uniform-distribution with four apopores (11) around the filter plate, have two apertures (12) on the inwall of apopore (11), silicon-containing wastewater enters through filter cloth from water inlet (10) and filters, flow out from apopore (11), the aperture (12) that passes through again simultaneously on the apopore (11) repeats to circulate in filter plate, reaches secondary filter; After filter press is used to complete, when filter cloth cleans, feed compressed air earlier from the filter plate both sides filter cloth on the whole filter plate is carried out blowback, make the silica flour that adheres on the filter cloth moisture that volatilizees fast, silicon powder deposit is filter cake shape, minimizing runs into behind the air heating and spontaneous combustion and environment is produced pollutes because silica flour is moisture, filter cake adopts automatic panel-turnover to connect the slag structure or the mode of manually rooting out is eliminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482468.XA CN103272433B (en) | 2012-11-23 | 2012-11-23 | A kind of filtration, purification processing method of silicon powder-containing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482468.XA CN103272433B (en) | 2012-11-23 | 2012-11-23 | A kind of filtration, purification processing method of silicon powder-containing waste water |
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| Publication Number | Publication Date |
|---|---|
| CN103272433A true CN103272433A (en) | 2013-09-04 |
| CN103272433B CN103272433B (en) | 2016-07-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103482840A (en) * | 2013-09-22 | 2014-01-01 | 天津中材工程研究中心有限公司 | Sludge film precoating and dehydrating technology and equipment |
| CN112619286A (en) * | 2020-12-17 | 2021-04-09 | 襄阳龙蟒钛业有限公司 | Method for purifying and crystallizing titanium dioxide solution |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2079994U (en) * | 1990-05-27 | 1991-07-03 | 谭绩生 | Distomaceous earth solid board fine filting machine |
| CN1562801A (en) * | 2004-04-09 | 2005-01-12 | 大连理工大学 | Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge |
| JP2007099586A (en) * | 2005-10-07 | 2007-04-19 | Oji Paper Co Ltd | Method for producing silica particulate-dispersed liquid, silica particulate-dispersed liquid and ink jet recording sheet |
| CN101703854A (en) * | 2009-09-27 | 2010-05-12 | 上海安昆水处理设备有限公司 | Wastewater treatment system and wastewater treatment method thereof |
-
2012
- 2012-11-23 CN CN201210482468.XA patent/CN103272433B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2079994U (en) * | 1990-05-27 | 1991-07-03 | 谭绩生 | Distomaceous earth solid board fine filting machine |
| CN1562801A (en) * | 2004-04-09 | 2005-01-12 | 大连理工大学 | Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge |
| JP2007099586A (en) * | 2005-10-07 | 2007-04-19 | Oji Paper Co Ltd | Method for producing silica particulate-dispersed liquid, silica particulate-dispersed liquid and ink jet recording sheet |
| CN101703854A (en) * | 2009-09-27 | 2010-05-12 | 上海安昆水处理设备有限公司 | Wastewater treatment system and wastewater treatment method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103482840A (en) * | 2013-09-22 | 2014-01-01 | 天津中材工程研究中心有限公司 | Sludge film precoating and dehydrating technology and equipment |
| CN112619286A (en) * | 2020-12-17 | 2021-04-09 | 襄阳龙蟒钛业有限公司 | Method for purifying and crystallizing titanium dioxide solution |
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| Publication number | Publication date |
|---|---|
| CN103272433B (en) | 2016-07-06 |
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Address after: 655011 Sanjiang Avenue, Qujing economic and Technological Development Zone, Yunnan 9 Patentee after: Yunnan metallurgical cloud core silicon material Limited by Share Ltd Address before: 655011 Sanjiang Avenue, Qujing economic and Technological Development Zone, Qujing, Yunnan, 9 Patentee before: Kunming Yeyan New Material Co., Ltd. |