CN102430272B - Method for treating sandstone wastewater - Google Patents
Method for treating sandstone wastewater Download PDFInfo
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- CN102430272B CN102430272B CN 201110333587 CN201110333587A CN102430272B CN 102430272 B CN102430272 B CN 102430272B CN 201110333587 CN201110333587 CN 201110333587 CN 201110333587 A CN201110333587 A CN 201110333587A CN 102430272 B CN102430272 B CN 102430272B
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Abstract
The invention discloses a method for treating sandstone wastewater, which is favorable for preventing blockage of a horizontal flow type sedimentation tank sandstone discharge system. The method mainly comprises the following steps of: firstly, dividing a drainage region at the bottom of a horizontal flow type sedimentation tank into two drainage regions according to the horizontal flow direction of water in the horizontal flow type sedimentation tank in sequence; then, connecting respective sandstone discharge systems for the two drainage regions respectively; and then, discharging sandstones in the two drainage regions to the exterior of the horizontal flow type sedimentation tank through the respective sandstone discharge systems respectively. By using the method provided by the invention, occurrence of a hardening phenomenon can be effectively avoided, the blockage of the horizontal flow type sedimentation tank sandstone discharge system can be favorably avoided, and long-term stable operation of the horizontal flow type sedimentation tank is guaranteed.
Description
Technical field
The present invention relates to the method for the treatment of sandstone wastewater of a kind of Hydroelectric Project Construction field application.
Background technology
At present, in the Hydroelectric Project Construction field, often need to be processed the waste water that contains a large amount of sandstones, gravel content in this waste water is generally at 10000mg/L to 130000mg/L, the particle diameter of sandstone is generally below 100 μ m, especially concentrate in 50 μ m to 100 μ m scopes, and in the scope below 10 μ m.To use rectangular sedimentation tank while generally this waste water initial stage of carrying out being processed, the pond type of rectangular sedimentation tank generally is rectangle, waste water flows into from an end in pond, the other end that horizontal direction flows through ，Cong pond, pond flows out, and in the bottom in pond, is provided with sludge discharging area, be provided with a plurality of buckets in sludge discharging area, the bottom of each bucket is connected with blow down branch, and each blow down branch is connected with same set of sandstone exhaust system, by the regular or lasting discharge sandstone of sandstone exhaust system.The rectangular sedimentation tank of said structure has the following disadvantages in use: above-mentioned sandstone exhaust system is often stopped up by sandstone, cause the sandstone in rectangular sedimentation tank not discharge in time, affect the normal use of rectangular sedimentation tank, even cause the paralysis of whole Waste Water Treatment, and while exhaust system being cleared up at every turn, all need to consume a large amount of manpower and materials, and need to shut down for the system that waste water is processed whole, affect normally carrying out of wastewater treatment, have greater environmental impacts.
Summary of the invention
The technical problem that the present invention solves be to provide a kind of be conducive to avoid rectangular sedimentation tank sandstone exhaust system to stop up the method for the treatment of sandstone wastewater.
The technical solution adopted for the present invention to solve the technical problems is: for the treatment of the method for sandstone wastewater, comprise rectangular sedimentation tank, described rectangular sedimentation tank is provided with delivery port, bottom at rectangular sedimentation tank is provided with sludge discharging area, be provided with a plurality of buckets in described sludge discharging area, the bottom of each bucket is connected with blow down branch, the sludge discharging area of rectangular sedimentation tank bottom is divided into to grit sludge discharging area and grail sludge discharging area successively by the advection direction of the water in rectangular sedimentation tank, wherein, advection direction along water, the length of described rectangular sedimentation tank is controlled at 9m to 11m, the length ratio of described grit sludge discharging area and grail sludge discharging area is 1: 2, by the horizontal flow speed control in rectangular sedimentation tank, built in 0.003m/s to 0.004m/s, the depth of water is controlled at 0.9m to 1.2m, the blow down branch that each bucket in the grit sludge discharging area connects forms the grit blow down branch, each grit blow down branch is connected with the grit exhaust system, by each grit blow down branch and grit exhaust system, the sandstone in the grit sludge discharging area is discharged, the blow down branch that each bucket in the grail sludge discharging area connects forms the grail blow down branch, each grail blow down branch is connected with the grail exhaust system, by each grail blow down branch and grail exhaust system, the sandstone in the grail sludge discharging area is discharged.
Further: the water that the delivery port of rectangular sedimentation tank is flowed out enters in the flocculation tank that is added with flocculant, then the water in flocculation tank is entered to flocculation sedimentation tank.
Further: the sandstone that the grit exhaust system is discharged enters the grit mud-collecting well, and the sandstone that the grail exhaust system is discharged enters the grail mud-collecting well.
Further: the sandstone in the sandstone in the grit mud-collecting well and grail mud-collecting well is entered respectively to the sandstone dewater unit and dewatered.
The invention has the beneficial effects as follows: the research deep by long-term system is found, the reason that causes exhaust system often to stop up is that grit and the grail in rectangular sedimentation tank discharges by same set of exhaust system simultaneously, under grail and grit interact, the serious phenomenon that hardens appears, namely sandstone caking hardening, be difficult to remove from exhaust system, when the phenomenon that hardens is more serious, exhaust system can be blocked.And the present invention is divided by the sludge discharging area by the rectangular sedimentation tank bottom, form two sludge discharging area, be respectively grit sludge discharging area and grail sludge discharging area, the sandstone of variable grain degree can be discharged by the exhaust system by separately like this, can reduce the interactional probability of grail and grit, and then reduce the probability that the phenomenon that hardens occurs, and therefore be conducive to avoid the sandstone exhaust system of rectangular sedimentation tank to stop up, be conducive to guarantee the long-term normal running of rectangular sedimentation tank.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the rectangular sedimentation tank for the treatment of sandstone wastewater of the present invention, flocculation tank, flocculation sedimentation tank.
In figure, be labeled as: grit blow down branch 9, grail blow down branch 10, delivery port 11, grit sludge discharging area 12, grail sludge discharging area 13, grit exhaust system 15, grail exhaust system 16, grit mud-collecting well 17, grail mud-collecting well 18, rectangular sedimentation tank 19, flocculation tank 23, flocculation sedimentation tank 32, sandstone dewater unit 41.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in Figure 1, method for the treatment of sandstone wastewater of the present invention, comprise rectangular sedimentation tank 19, described rectangular sedimentation tank 19 is provided with delivery port 11, bottom at rectangular sedimentation tank 19 is provided with sludge discharging area, be provided with a plurality of buckets in described sludge discharging area, the bottom of each bucket is connected with blow down branch, the sludge discharging area of rectangular sedimentation tank 19 bottoms is divided into to grit sludge discharging area 12 and grail sludge discharging area 13 successively by the advection direction of the water in rectangular sedimentation tank, wherein, advection direction along water, the length of described rectangular sedimentation tank 19 is controlled at 9m to 11m, the length ratio of described grit sludge discharging area 12 and grail sludge discharging area 13 is 1: 2, by the horizontal flow speed control in rectangular sedimentation tank 19, built in 0.003m/s to 0.004m/s, the depth of water is controlled at 0.9m to 1.2m, the blow down branch that each bucket in grit sludge discharging area 12 connects forms grit blow down branch 9, each grit blow down branch 9 is connected with grit exhaust system 15, by each grit blow down branch 9 and grit exhaust system 15, the sandstone in grit sludge discharging area 12 is discharged, the blow down branch that each bucket in grail sludge discharging area 13 connects forms grail blow down branch 10, each grail blow down branch 10 is connected with grail exhaust system 16, by each grail blow down branch 10 and grail exhaust system 16, the sandstone in grail sludge discharging area 13 is discharged.
The advection direction of above-mentioned water, the direction of water when bottom horizontal flow sheet namely, as shown in the arrow in rectangular sedimentation tank in Fig. 1 19, the flow velocity of the advection direction of water is horizontal flow velocity namely.Above-mentioned grit exhaust system can comprise many pipelines and corresponding control valve, and above-mentioned grail exhaust system also can comprise many pipelines and corresponding control valve.
By the discovery that studies for a long period of time, the reason that causes exhaust system often to stop up is that grit and the grail in rectangular sedimentation tank discharges by same set of exhaust system simultaneously, grail and grit interact and the serious phenomenon that hardens occurs, namely on the tube wall of exhaust system, lump, thereby reduced effective blowdown space of pipeline, finally make line clogging, this phenomenon be mainly due to grail and grit in moving process, grail can be filled the gap between grit gradually, make grit be difficult for mobile, the difficult movement of grit also can be hindered the movement of the grail in gap.By research, also find, the harden probability of phenomenon of interacting between the following particle of the above particle of 50 μ m and 50 μ m is larger, if by the particle classified emission, can effectively reduce the probability of the phenomenon generation of hardening.The present invention just is being based on this thought, by controlling the length of rectangular sedimentation tank 19, the length ratio of grit sludge discharging area 12 and grail sludge discharging area 13, the parameters such as horizontal flow velocity and the depth of water are carried out the subregion precipitation by the sandstone in waste water according to the size of particle diameter, particle diameter in the main collection waste water of above-mentioned grit sludge discharging area 12 is at the above sandstone particle of 50 μ m, the main sandstone particle of particle diameter below 50 μ m of collecting in waste water of grail sludge discharging area 13, in method of the present invention, grit sludge discharging area 12 reaches more than 95% for the clearance of the above sandstone particle of 50 μ m in waste water.Therefore, by method of the present invention, sandstone can be collected according to particle size classification, then classified emission, this discharging modes can effectively reduce the occurrence probability of the phenomenon that hardens, make sandstone can pass through smoothly the pipeline of respective row place system, therefore be conducive to avoid the sandstone exhaust system of rectangular sedimentation tank to stop up, be conducive to guarantee the long-term normal running of rectangular sedimentation tank.Find by practical application, adopt method of the present invention, grit exhaust system and grail exhaust system can not stop up substantially.
For the water further rectangular sedimentation tank flowed out is purified, on the basis of the above, also comprise flocculation tank 23 and flocculation sedimentation tank 32, the water that the delivery port of described rectangular sedimentation tank 19 11 is flowed out enters in the flocculation tank 23 that is added with flocculant, then the water in flocculation tank 23 is entered to flocculation sedimentation tank 32.The water flowed out from flocculation sedimentation tank 32 can directly be discharged into external environment, not environment to external world.Adopt said structure, namely whole sandstone wastewater treatment system comprises rectangular sedimentation tank, flocculation tank and flocculation sedimentation tank, the sandstone wastewater treatment system of this structure is simple in structure, easy to operate, and floor space is little, use cost is low, and applicability is comparatively extensive.
On the basis of the above, for the ease of the sandstone to giving off, reclaimed, the sandstone that grit exhaust system 15 is discharged enters grit mud-collecting well 17, and the sandstone that grail exhaust system 16 is discharged enters grail mud-collecting well 18.Can be by the sandstone centralized recovery by mud-collecting well.Further, for the ease of the sandstone to after reclaiming, transported, the sandstone in the sandstone in grit mud-collecting well 17 and grail mud-collecting well 18 can be entered respectively to sandstone dewater unit 41 and be dewatered.Sandstone dewater unit 41 can be the devices such as centrifugal dehumidifier or filter press.By the sandstone after dehydration, be convenient to transport by transport vehicle.
Embodiment:
As shown in Figure 1, method for the treatment of sandstone wastewater of the present invention, comprise rectangular sedimentation tank 19, described rectangular sedimentation tank 19 is provided with delivery port 11, bottom at rectangular sedimentation tank 19 is provided with sludge discharging area, be provided with a plurality of buckets in described sludge discharging area, the bottom of each bucket is connected with blow down branch, the sludge discharging area of rectangular sedimentation tank 19 bottoms is divided into to grit sludge discharging area 12 and grail sludge discharging area 13 successively by the advection direction of the water in rectangular sedimentation tank, wherein, the width of rectangular sedimentation tank 19 is 1m, advection direction along water, the length of described rectangular sedimentation tank 19 is 9.9m, the length ratio of described grit sludge discharging area 12 and grail sludge discharging area 13 is 1: 2, namely the length of grit sludge discharging area 12 is 3.3m, the length of grail sludge discharging area 13 is 6.6m, by the horizontal flow speed control in rectangular sedimentation tank 19, built in 0.0036m/s, the depth of water is controlled at 1m, the blow down branch that each bucket in grit sludge discharging area 12 connects forms grit blow down branch 9, each grit blow down branch 9 is connected with grit exhaust system 15, by each grit blow down branch 9 and grit exhaust system 15, the sandstone in grit sludge discharging area 12 is discharged, the blow down branch that each bucket in grail sludge discharging area 13 connects forms grail blow down branch 10, each grail blow down branch 10 is connected with grail exhaust system 16, by each grail blow down branch 10 and grail exhaust system 16, the sandstone in grail sludge discharging area 13 is discharged.
Claims (4)
1. for the treatment of the method for sandstone wastewater, comprise rectangular sedimentation tank (19), described rectangular sedimentation tank (19) is provided with delivery port (11), bottom at rectangular sedimentation tank (19) is provided with sludge discharging area, be provided with a plurality of buckets in described sludge discharging area, the bottom of each bucket is connected with blow down branch, it is characterized in that:
The sludge discharging area of rectangular sedimentation tank (19) bottom is divided into to grit sludge discharging area (12) and grail sludge discharging area (13) successively by the advection direction of the water in rectangular sedimentation tank, wherein, advection direction along water, the length of described rectangular sedimentation tank (19) is controlled at 9m to 11m, and the length ratio of described grit sludge discharging area (12) and grail sludge discharging area (13) is 1: 2;
By the horizontal flow speed control in rectangular sedimentation tank (19), built in 0.003m/s to 0.004m/s, the depth of water is controlled at 0.9m to 1.2m;
The blow down branch that each bucket in grit sludge discharging area (12) connects forms grit blow down branch (9), each grit blow down branch (9) is connected with grit exhaust system (15), by each grit blow down branch (9) and grit exhaust system (15), the sandstone in grit sludge discharging area (12) is discharged;
The blow down branch that each bucket in grail sludge discharging area (13) connects forms grail blow down branch (10), each grail blow down branch (10) is connected with grail exhaust system (16), by each grail blow down branch (10) and grail exhaust system (16), the sandstone in grail sludge discharging area (13) is discharged.
2. the method for the treatment of sandstone wastewater as claimed in claim 1, it is characterized in that: the water that the delivery port of rectangular sedimentation tank (19) (11) is flowed out enters in the flocculation tank (23) that is added with flocculant, then the water in flocculation tank (23) is entered to flocculation sedimentation tank (32).
3. the method for the treatment of sandstone wastewater as claimed in claim 1, it is characterized in that: the sandstone that grit exhaust system (15) is discharged enters grit mud-collecting well (17), and the sandstone that grail exhaust system (16) is discharged enters grail mud-collecting well (18).
4. the method for the treatment of sandstone wastewater as claimed in claim 3, is characterized in that: the sandstone in the sandstone in grit mud-collecting well (17) and grail mud-collecting well (18) is entered respectively to sandstone dewater unit (41) and dewatered.
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| CN 201110333587 CN102430272B (en) | 2011-10-28 | 2011-10-28 | Method for treating sandstone wastewater |
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| CN 201110333587 CN102430272B (en) | 2011-10-28 | 2011-10-28 | Method for treating sandstone wastewater |
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| CN102430272A CN102430272A (en) | 2012-05-02 |
| CN102430272B true CN102430272B (en) | 2013-12-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102766702B (en) * | 2012-07-24 | 2014-04-02 | 广西大学 | High-speed sedimentation device |
| CN106242010A (en) * | 2016-08-31 | 2016-12-21 | 青川县俸佳硅矿有限责任公司 | A kind of washed-out sand sewage zero-discharge cycling and reutilization processes technique |
| CN107986478A (en) * | 2017-12-18 | 2018-05-04 | 合肥市脍炙人家家居用品有限责任公司 | A kind of sewage-treatment plant |
| CN109045774A (en) * | 2018-08-29 | 2018-12-21 | 日昌升集团有限公司 | A kind of sandstone flushing waste water processing unit and method |
| CN109626746A (en) * | 2019-01-14 | 2019-04-16 | 中原环保郑州设备工程科技有限公司 | The middle-size and small-size multipoint water feeding advanced nitrogen dephosphorization sewage disposal system of integration and processing method |
| CN112023456A (en) * | 2020-08-25 | 2020-12-04 | 长江勘测规划设计研究有限责任公司 | Sedimentation tank for treating high-concentration sandstone wastewater |
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| JPH10314506A (en) * | 1997-05-16 | 1998-12-02 | Kawasaki Steel Corp | Precipitation tank for wastewater treatment |
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| CN101254375A (en) * | 2007-12-17 | 2008-09-03 | 中国铝业股份有限公司 | Dewatering process screening fine ore of alumyte |
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Address after: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee after: Co., Ltd of Chengdu survey and design academy of electricity Jian group of China Address before: The North Qingyang District of Chengdu City, Sichuan Province, No. 610072 Patentee before: Chengdu Hydroelectric Investigation & Design Institute of SPC |