CN112028341B - Sand stone production wastewater treatment system and wastewater treatment method in hydraulic and hydroelectric engineering construction - Google Patents
Sand stone production wastewater treatment system and wastewater treatment method in hydraulic and hydroelectric engineering construction Download PDFInfo
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- 239000004576 sand Substances 0.000 title claims abstract description 72
- 239000004575 stone Substances 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 26
- 238000010276 construction Methods 0.000 title claims abstract description 15
- 239000002351 wastewater Substances 0.000 claims abstract description 55
- 239000010865 sewage Substances 0.000 claims abstract description 13
- 238000004064 recycling Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 238000004062 sedimentation Methods 0.000 claims description 75
- 230000001105 regulatory effect Effects 0.000 claims description 53
- 239000010802 sludge Substances 0.000 claims description 30
- 239000000706 filtrate Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 239000000701 coagulant Substances 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 239000006228 supernatant Substances 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 239000008394 flocculating agent Substances 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 230000003020 moisturizing effect Effects 0.000 claims description 2
- 235000020681 well water Nutrition 0.000 claims 3
- 239000002349 well water Substances 0.000 claims 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 10
- 238000012545 processing Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a sand and stone production wastewater treatment system and a wastewater treatment method in hydraulic and hydroelectric engineering construction. Can effectively treat production wastewater, recycle fine sand, transport mud cakes, realize the reuse of effluent reaching the standard, realize the recycling of sewage, simplify equipment, reduce civil engineering, and have low energy consumption and low operation cost.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a sand and stone production wastewater treatment system and a wastewater treatment method.
Background
The construction of hydraulic and hydroelectric engineering needs a large amount of high-quality sand aggregates, a large amount of wastewater can be generated by flushing aggregates at each level, the sand content is high, if the direct discharge is not treated, serious pollution is caused to water body, the ecological system is destroyed, the sand aggregate wastewater must be treated to reach the standard and then recycled or discharged, and the sand aggregate production wastewater treatment engineering becomes an important point in the environmental protection work of the hydraulic and hydroelectric engineering.
How to realize standard emission and zero emission of sand and stone wastewater treatment is a difficult problem, and the main reasons are high sand content and insufficient analysis on a source, so that a large amount of manpower and material resources are required to be input for system transformation, and unnecessary economic loss is caused. At present, the treatment process of the sandstone material processing wastewater does not have mature process and clear standard requirements, and is particularly important to the research of the sandstone material processing wastewater treatment engineering process.
The sand and stone waste water is mainly characterized by large water quantity, high suspended matter concentration, single water quality index and easy treatment on the surface, but the system can not continuously run because of the high content of powdery stone powder in the waste water, strong hydrophobicity of the stone powder and easy hardening of mud, so that the mud is difficult to discharge from the bottom mud of the structure and the pipeline is seriously blocked. The difficulty in sand and stone waste water treatment lies in that mud is difficult to discharge in operation, so that the simpler process is selected, the higher the stability of the system is, the equipment is simplified under the condition of ensuring smooth mud discharge, the treatment process is simplified, the stability of the system is improved, and the construction and operation cost is greatly reduced.
Disclosure of Invention
The invention aims to solve the technical problems of providing a sand and stone material production wastewater treatment system and a wastewater treatment method in hydraulic and hydroelectric engineering construction, which can effectively treat the production wastewater of a sand and stone material processing field, recycle sand, transport mud cakes outwards and recycle water, and compared with the conventional treatment process, the invention reduces 2 treatment units and a large number of corresponding auxiliary equipment, has low energy consumption, low operation cost, reduced blocking possibility, ensures stable operation of the system and has remarkable environmental protection benefit.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a grit material waste water treatment system in hydraulic and hydroelectric engineering construction, including fine sand recovery unit, the equalizing basin, plate-and-frame filter press, sedimentation tank and well pond, grit material waste water flows into the equalizing basin through the pipeline through fine sand recovery unit, add flocculating agent and coagulant aid through the pipeline blender before entering the equalizing basin, install the mixer in the equalizing basin, waste water in the equalizing basin is sent to the plate-and-frame filter press through the pipeline through first mud elevator pump and is dewatered, the solid forms the mud cake, the filtrate gets into the sedimentation tank, add coagulant aid through the pipeline blender before advancing the plate-and-frame filter press, add the flocculating agent before advancing the sedimentation tank, after the sedimentation tank deposits, sedimentation tank supernatant flows into well pond, the mud promotes to the equalizing basin through the second mud elevator pump, set up moisturizing pipe on the well pond, the retrieval and utilization pipe of retrieval and the flushing water pipe of callback festival pond.
The waste water from sand and stone production enters the fine sand recovery device through pressure flow or gravity flow.
Filtrate after the plate-and-frame filter press is dehydrated enters a sedimentation tank along a groove or a pipeline in a self-flowing or sewage pump lifting mode, when the pipeline is adopted, flocculant is added through a pipeline mixer before the filtrate enters the sedimentation tank, and when the groove is adopted, flocculant is added through a reaction tank before the filtrate enters the sedimentation tank.
Supernatant in the sedimentation tank flows into the middle water tank through gravity flow.
The water suction pipe of the first sludge lifting pump is a straight pipe, and the inlet is beveled and is close to the stirrer and is close to the center of the bottom of the regulating tank.
The number of the regulating tanks is at least 2, and the regulating tanks are designed in parallel.
The sedimentation tank is a advection sedimentation tank, a radial sedimentation tank or a vertical sedimentation tank.
A wastewater treatment method adopting the sandstone material production wastewater treatment system in the hydraulic and hydroelectric engineering construction comprises the following steps:
(1) The waste water flows through a fine sand recycling device through pressure flow or gravity flow, fine sand is recycled, the waste water flows into the regulating tank through a pipe line, and flocculating agent and coagulant aid are added before the waste water enters the regulating tank through a pipe line mixer;
(2) After passing through the regulating tank, the wastewater is pumped to a plate-and-frame filter press by a first sludge lifting pump for dehydration, coagulant aids are added through a pipeline mixer before entering the plate-and-frame filter press, the wastewater passes through filter cloth, solids are left on the filter cloth to form mud cakes, the mud cakes are transported outwards, filtrate enters a sedimentation tank by self-flowing or a sewage pump lifting mode, and after the sewage pump, flocculant is added through a pipeline mixer reaction tank before entering the sedimentation tank;
(3) After sedimentation in the sedimentation tank, supernatant fluid of the sedimentation tank flows into a middle water tank through gravity flow, and sludge is lifted to an adjusting tank through a second sludge lifting pump;
(4) Clear water in the middle water tank is recycled to be used in a sand stone production factory, a back flushing water pipe of the clear water in the middle water tank is arranged, before the system is stopped, water is pumped from the middle water tank to the regulating tank, and the clear water is circulated to the regulating tank in each treatment unit and then the system is closed when the mud sand content in the regulating tank is low.
The beneficial effects of the invention are as follows: the method has the advantages that the production wastewater of a sand and stone material processing field can be effectively treated, fine sand is recycled, mud cakes are transported outwards, the effluent reaches the standard and is recycled, sewage recycling is realized, the equipment is simplified, civil engineering is reduced, the energy consumption is low, the running cost is low, the blocking possibility is reduced, the stable running of the system is ensured, and the environmental protection benefit is remarkable.
Drawings
FIG. 1 is a block diagram of a wastewater treatment system for sand production according to the present invention.
FIG. 2 is a flow chart of the method for treating wastewater in sand production according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in figure 1, the sand and stone production wastewater treatment system in hydraulic and hydroelectric engineering construction comprises a fine sand recovery device 1, a regulating tank 8, a plate-and-frame filter press 5, a sedimentation tank 6 and a reclaimed water tank 7, sand and stone production wastewater flows into the regulating tank 8 through a pipeline through the fine sand recovery device 1, a flocculating agent 2 and a coagulant aid 3 are added through a pipeline mixer 9 before entering the regulating tank 8, a stirrer is arranged in the regulating tank 8, wastewater in the regulating tank 8 is sent to the plate-and-frame filter press 5 through a pipeline through a first sludge lifting pump 4 to be dehydrated, solids form mud cakes, filtrate enters the sedimentation tank 6, a coagulant aid 3 is added through the pipeline mixer 9 before entering the plate-and-frame filter press 5, a flocculating agent 2 is added before entering the sedimentation tank 6, after sedimentation tank 6 is settled, supernatant fluid of the sedimentation tank 6 flows into the reclaimed water tank 7, and sludge is lifted to the regulating tank 8 through a second sludge lifting pump, and a water supplementing pipe 10, a recycling pipe of a recycling production factory and a flushing water pipe of the reclaimed water tank are arranged on the reclaimed water tank 7.
The waste water from sand production enters the fine sand recovery device 1 by pressure flow or gravity flow. Filtrate after the plate and frame filter press 5 is dehydrated enters the sedimentation tank 6 along grooves or pipelines in a self-flowing or sewage pump lifting mode, when the pipelines are adopted, the flocculant 2 is added through the pipeline mixer 9 before the filtrate enters the sedimentation tank 6, and when the grooves are adopted, the flocculant 2 is added through the reaction tank before the filtrate enters the sedimentation tank 6. The supernatant in the sedimentation tank 6 flows into the intermediate tank 7 by gravity flow. The water suction pipe of the first sludge lifting pump 4 is a straight pipe, and the inlet is beveled and is close to the stirrer and is close to the center of the bottom of the regulating tank. The number of the regulating tanks is at least 2, and the regulating tanks are designed in parallel. The sedimentation tank 6 is a advection sedimentation tank, a radial sedimentation tank or a vertical sedimentation tank.
As shown in fig. 2, a method for wastewater treatment using the above-mentioned sand production wastewater treatment system comprises the following steps:
(1) The waste water flows through a fine sand recycling device through pressure flow or gravity flow, fine sand is recycled, the waste water flows into the regulating tank through a pipe line, and flocculating agent and coagulant aid are added before the waste water enters the regulating tank through a pipe line mixer;
(2) After passing through the regulating tank, the wastewater is pumped to a plate-and-frame filter press by a sludge lifting pump to be dehydrated, coagulant aid is added through a pipeline mixer before entering the plate-and-frame filter press, the wastewater passes through filter cloth, solids are left on the filter cloth to form mud cakes, the mud cakes are transported outwards, filtrate enters a sedimentation tank by self-flowing or a sewage pump lifting mode, and flocculant is added through a pipeline mixer reaction tank after the sewage pump enters the sedimentation tank;
(3) After sedimentation in the sedimentation tank, supernatant fluid of the sedimentation tank flows into a middle water tank through gravity flow, and sludge is lifted to an adjusting tank through a sludge lifting pump;
(4) Clear water in the middle water tank is recycled to be used in a sand stone production factory, a back flushing water pipe of the clear water in the middle water tank is arranged, before the system is stopped, water is pumped from the middle water tank to the regulating tank, and the clear water is circulated to the regulating tank in each treatment unit and then the system is closed when the mud sand content in the regulating tank is low.
Through the steps, the fine sand recycling of the sand and stone production wastewater, the outward transportation of mud cakes and the standard reuse of effluent are realized.
The regulating tank is different from the conventional design in that the inlet of the water suction pipe of the first sludge lifting pump of the regulating tank is not provided with a downward elbow and a horn mouth, the water suction pipe is a straight pipe, the inlet is beveled and is close to the stirrer (0.3 m from the central shaft of the stirrer) and is close to the central position of the bottom of the regulating tank (the outer wall of the water suction pipe is 0.2m from the inner bottom of the tank)
The waste water is filtered by a filter medium (filter cloth) under the action of pressure, solids stay on the filter cloth to form mud cakes, the filtrate becomes clear liquid without solids, and the clear liquid enters a sedimentation tank along a groove or a pipeline in a self-flowing or pump lifting mode. The sedimentation tank can be in the forms of a horizontal sedimentation tank, a radial sedimentation tank, a vertical sedimentation tank and the like. Different sedimentation tanks are different in water inlet mode, the sedimentation tank water outlet is provided with a water collecting tank, supernatant flows into a middle water tank through the water collecting tank, solid matters are left at the bottom, a mud bucket is arranged at the lower part of the sedimentation tank, and the supernatant is lifted to the regulating tank through a mud lifting pump. When the sedimentation tank adopts a plurality of hoppers for discharging mud, the mud is required to be discharged respectively, and an independent gate valve and a mud discharging pipe are arranged.
Specifically, the wastewater enters the fine sand recycling device 1 through pressure flow or gravity flow, fine sand with the particle size of more than or equal to 0.15mm is recycled, and sand grains with the particle size of less than or equal to 0.15mm enter the regulating reservoir and the pump room. After passing through the fine sand recovery device 1, sand grains in the wastewater do not block a subsequent water pump, filter cloth of the plate-and-frame filter press (5) cannot be worn, maintenance times are reduced, and wastewater treatment can continuously run.
The regulating tank has the function of regulating water quality and quantity, and the residence time of the regulating tank is longer than or equal to the unit working time of the plate-and-frame filter press. Because the silt content in the sand and stone wastewater is high and easy to harden, if the power of the stirrer is insufficient, the sludge is deposited, the tank capacity is reduced, a sludge discharge pipe is blocked, and the system cannot continuously run for a long time, so that the power of the stirrer of the regulating tank cannot be calculated according to the standard of conventional water treatment, and the power of the stirrer is required to be determined according to the characteristics of the sand and stone wastewater and is continuously stirred. Because the failure rate of the sand and stone wastewater treatment process equipment is high, the number of the divisions of the regulating tank is not less than 2, and the regulating tank is designed in parallel.
The regulating tank is different from the conventional design in that the inlet of the suction pipe of the first sludge lifting pump 4 of the regulating tank is not provided with a downward elbow and a horn mouth, is a straight pipe and is close to the stirrer (0.3 m away from the central shaft of the stirrer) and is close to the central position of the bottom of the regulating tank, and the inlet of the suction pipe is beveled. If the inlet of the water inlet pipe of the first sludge lifting pump 4 of the regulating tank is provided with a downward elbow and a horn mouth like the conventional design, the water inlet of the water suction pipe is easily blocked, and the regulating tank lifting pump cannot work normally, so that the downward elbow and the horn mouth are canceled, a straight pipe is close to the stirrer and the central position of the bottom of the regulating tank, the water inlet of the water suction pipe is inclined, the water inlet is not blocked, and the normal work of the sludge pump is ensured.
Because waste water has hardening nature, if with immersible pump or self priming pump, cause the jam of water pump very easily, make the unable normal work of sludge pump, so select the dry-type sediment stuff pump as equalizing basin elevator pump 4, must establish the underground pump room, guarantee the long-time stable operation of system.
The wastewater is directly sent to a plate-frame filter pressing workshop for dehydration by the regulating tank through a sludge lifting pump 4. The sand and stone material processing system has high concentration of suspended matters in the production wastewater, flocculant 2 (PAC) and coagulant aid 3 (PAM) are added before entering an adjusting tank, after a lifting pump of the adjusting tank, coagulant aid 3 (PAM) is added before entering a plate and frame filter pressing workshop, so that the sludge is flocculated and precipitated, the solid-liquid separation effect is good, and the sludge can directly enter the plate and frame filter press 5 for dehydration. The waste water directly enters the plate-and-frame filter press 5 for dehydration, and compared with the conventional treatment process, the method reduces 2 treatment units and a large amount of corresponding auxiliary equipment, has low energy consumption and low operation cost, and most importantly, reduces the possibility of blockage and ensures the continuous operation of the system.
The plate-and-frame filter press 5 is used as sludge dewatering equipment and is used as a core process link, and the filter cloth of the plate-and-frame filter press 5 is used for physical interception to purify sewage. The minimum aperture of the filter cloth of the plate-and-frame filter press 5 is 0.1 mu m, the grain diameter of the sand and stone wastewater is basically in mu m level after the sand and stone wastewater passes through the fine sand recovery device 1, and most suspended matters can be trapped through the filter cloth. Under the action of pressure, the wastewater is filtered by a filter medium (filter cloth), solids stay on the filter cloth to form mud cakes, the water content of the mud cakes is 25% -30%, the mud cakes are transported outwards, filtrate becomes clear liquid without solids, and the clear liquid enters a sedimentation tank along a groove or a pipeline in a self-flowing or pump lifting mode.
The sedimentation tank 6 can be in the forms of a horizontal sedimentation tank, a radial sedimentation tank, a vertical sedimentation tank, an inclined tube sedimentation tank and the like. The suspended matter content of the filtrate after passing through the plate-and-frame filter press 5 is about tens to hundreds milligrams per liter, and a flocculating agent 2 (PAC) is added before entering a sedimentation tank, so that the sludge sedimentation effect is improved. After sedimentation in a sedimentation tank, supernatant fluid of the sedimentation tank flows into a middle water tank through gravity flow, and sludge is led throughLifting the sludge to the regulating tank by a sludge lifting pump, and repeatedly performing treatment by a process flow. The surface load of the sedimentation tank is 0.5-4.5m 3 /(m 3 H) designing, namely designing the sediment time according to 1.0-2.5h, wherein the clay content in the sand and stone wastewater is high or low, and the clay content is low or no high.
The medium water tank 7 is used for adjusting water quantity difference caused by asynchronous water production of the treatment system and water production, and clear water is recycled for a sand stone production factory. The middle water tank is also provided with a water supplementing pipe 10 and a flushing water pipe for returning to the regulating tank. The water supplementing pipe 10 is used for compensating water brought away by sand and mud cakes generated by plate and frame filter pressing in the sand and stone material flushing process. Because the characteristic that grit waste water is easy to harden, can not have waste water in the equalizing basin, before the system stops operation, need draw water to the equalizing basin from the well pond, the clear water is circulated to the equalizing basin in each processing unit and closes the system again when mud sand content is less, and the flushing water pipe of callback equalizing basin is used for washing the waste water that remains in equalizing basin and the affiliated facilities.
The foregoing is merely illustrative of the preferred embodiments of the present invention and several modifications and variations can be made without departing from the principles of the present invention, which is to be regarded as a protective scope of the invention, and not as a limitation of the invention, i.e. equivalent modifications within the scope of the invention, and all the components not explicitly described in this embodiment can be implemented by the prior art.
Claims (7)
1. The utility model provides a grit material waste water treatment system in hydraulic and hydroelectric engineering construction, a serial communication port, including fine sand recovery unit (1), equalizing basin (8), plate and frame filter press (5), sedimentation tank (6) and well water pond (7), grit material waste water flows into equalizing basin (8) through pipeline through fine sand recovery unit (1), add flocculating agent (2) and coagulant aid (3) through pipeline blender (9) before entering equalizing basin (8), install the mixer in equalizing basin (8), waste water in equalizing basin (8) is sent to plate and frame filter press (5) through the pipeline through first mud elevator pump (4) and dewaters, the solid forms the mud cake, the filtrate gets into sedimentation tank (6), add coagulant aid (3) through pipeline blender (9) before advancing into sedimentation tank (6), after sedimentation tank (6) deposit, sedimentation tank (6) supernatant flows into well water pond (7), the mud is promoted to equalizing basin (8) through the second mud elevator pump, set up moisturizing pipe (10) on well water pond (7), the flushing pipe of the reclaimed factory is retrieved and recycled; the water suction pipe of the sludge lifting pump (4) is a straight pipe, and the inlet is beveled and is close to the stirrer and is close to the center of the bottom of the regulating tank.
2. The system for treating the sand and stone production wastewater in the construction of the hydraulic and hydroelectric engineering according to claim 1, wherein the sand and stone production wastewater enters the fine sand recovery device (1) through pressure flow or gravity flow.
3. The system for treating the sand and stone production wastewater in the construction of the water conservancy and hydropower engineering according to claim 1, wherein filtrate after the dehydration of the plate-and-frame filter press (5) enters the sedimentation tank (6) along a groove or a pipeline in a self-flowing or sewage pump lifting mode, when the pipeline is adopted, the flocculant (2) is added by the filtrate before the filtrate enters the sedimentation tank (6) through a pipeline mixer (9), and when the groove is adopted, the flocculant (2) is added by the filtrate before the filtrate enters the sedimentation tank (6) through a reaction tank.
4. The system for treating wastewater from sand production in hydraulic and hydroelectric engineering construction according to claim 1, wherein the supernatant in the sedimentation tank (6) flows into the middle water tank (7) through gravity flow.
5. The system for treating wastewater from sand and stone production in hydraulic and hydroelectric engineering according to claim 1, wherein the number of the regulating tanks is at least 2, and the regulating tanks are designed in parallel.
6. The system for treating the wastewater in the sand and stone production in the construction of the hydraulic and hydroelectric engineering according to claim 1, wherein the sedimentation tank (6) is a advection sedimentation tank, a radial sedimentation tank or a vertical sedimentation tank.
7. A method for wastewater treatment using the sand and stone material production wastewater treatment system in hydraulic and hydroelectric engineering construction according to any of claims 1 to 6, characterized by comprising the steps of:
(1) The waste water flows through a fine sand recycling device through pressure flow or gravity flow, fine sand is recycled, the waste water flows into the regulating tank through a pipe line, and flocculating agent and coagulant aid are added before the waste water enters the regulating tank through a pipe line mixer;
(2) After passing through the regulating tank, the wastewater is pumped to a plate-and-frame filter press by a sludge lifting pump to be dehydrated, coagulant aid is added through a pipeline mixer before entering the plate-and-frame filter press, the wastewater passes through filter cloth, solids are left on the filter cloth to form mud cakes, the mud cakes are transported outwards, filtrate enters a sedimentation tank by self-flowing or a sewage pump lifting mode, and flocculant is added through a pipeline mixer or a reaction tank after the sewage pump enters the sedimentation tank;
(3) After sedimentation in the sedimentation tank, supernatant fluid of the sedimentation tank flows into a middle water tank through gravity flow, and sludge is lifted to an adjusting tank through a sludge lifting pump;
(4) Clear water in the middle water tank is recycled to be used in a sand stone production factory, a back flushing water pipe of the clear water in the middle water tank is arranged, before the system is stopped, water is pumped from the middle water tank to the regulating tank, and the clear water is circulated to the regulating tank in each treatment unit and then the system is closed when the mud sand content in the regulating tank is low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011023746.6A CN112028341B (en) | 2020-09-25 | 2020-09-25 | Sand stone production wastewater treatment system and wastewater treatment method in hydraulic and hydroelectric engineering construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011023746.6A CN112028341B (en) | 2020-09-25 | 2020-09-25 | Sand stone production wastewater treatment system and wastewater treatment method in hydraulic and hydroelectric engineering construction |
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| Publication Number | Publication Date |
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| CN112028341A CN112028341A (en) | 2020-12-04 |
| CN112028341B true CN112028341B (en) | 2024-03-22 |
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| CN114573143A (en) * | 2022-03-14 | 2022-06-03 | 四川贝特格林环保科技有限公司 | Mixing station wastewater purification treatment method |
| CN115572010A (en) * | 2022-10-18 | 2023-01-06 | 中国电建集团北京勘测设计研究院有限公司 | Concrete production wastewater treatment system and method |
| CN117923740A (en) * | 2024-03-23 | 2024-04-26 | 河南威猛振动设备股份有限公司 | Continuous pulp disposal treatment system |
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