CN112028341A - Grit material production wastewater treatment system and wastewater treatment method - Google Patents
Grit material production wastewater treatment system and wastewater treatment method Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 83
- 238000004062 sedimentation Methods 0.000 claims abstract description 79
- 239000002351 wastewater Substances 0.000 claims abstract description 56
- 239000004576 sand Substances 0.000 claims abstract description 41
- 239000010802 sludge Substances 0.000 claims abstract description 41
- 239000008394 flocculating agent Substances 0.000 claims abstract description 19
- 239000000701 coagulant Substances 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 239000000706 filtrate Substances 0.000 claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000006228 supernatant Substances 0.000 claims abstract description 12
- 238000004064 recycling Methods 0.000 claims abstract description 9
- 230000018044 dehydration Effects 0.000 claims abstract description 8
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 43
- 239000004744 fabric Substances 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000004575 stone Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 4
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- 238000003825 pressing Methods 0.000 description 2
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- 239000002002 slurry Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- 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
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
The invention discloses a grit material production wastewater treatment system and a grit material production wastewater treatment method, wherein the grit material production wastewater flows into an adjusting tank through a pipeline through a fine sand recovery device, a flocculating agent and a coagulant aid are added through a pipeline mixer before entering the adjusting tank, a stirrer is arranged in the adjusting tank, the wastewater in the adjusting tank is conveyed to a plate-and-frame filter press through a pipeline by a first sludge lifting pump for dehydration, solids form a mud cake, filtrate enters a sedimentation tank, the coagulant aid is added through the pipeline mixer before entering the plate-and-frame filter press, the flocculating agent is added before entering the sedimentation tank, supernatant in the sedimentation tank flows into a reclaimed water tank after sedimentation in the sedimentation tank, sludge is lifted to the adjusting tank through the sludge lifting pump, and the reclaimed water tank is provided with a water replenishing pipe, a recycling pipe of a recycling production plant and a flushing water. The invention can effectively treat the production wastewater of the sandstone material processing field, recover and treat the fine sand, transport the mud cakes outside, recycle the effluent after reaching the standard, realize the reclamation of the sewage, simplify the equipment, reduce the civil engineering, and have low energy consumption and low operating cost.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a grit material production wastewater treatment system and a wastewater treatment method.
Background
The construction of hydraulic and hydroelectric engineering needs a large amount of high-quality gravel aggregates, all levels of aggregates are washed to produce a large amount of wastewater and have high sand content, if the wastewater is not directly discharged, the water body is seriously polluted, an ecological system is also damaged, the gravel wastewater is recycled or discharged after being treated to reach the standard, and the treatment engineering of the gravel production wastewater becomes the key point in the environmental protection work of the hydraulic and hydroelectric engineering.
The main reason for how to realize the standard discharge and zero discharge of the grit material wastewater treatment is that the sand content is high and the material source analysis is not enough, so that the system transformation needs to invest a large amount of manpower and material resources, and unnecessary economic loss is caused. At present, the treatment process of the wastewater from sandstone material processing has no mature process and clear specification requirements, and the research on the treatment engineering process of the wastewater from sandstone material processing is particularly important.
The sandstone material wastewater is mainly characterized by large water quantity, high concentration of suspended matters, single water quality index and easy surface treatment, but because the wastewater has high content of powdery stone powder, strong stone powder hydrophobicity and easy hardening of slurry, the sediment of a structure is difficult to discharge, pipelines are seriously silted up, and a system cannot continuously run. The difficulty of grit material waste water treatment lies in that the mud is difficult to arrange in the operation, therefore chooses the simpler technology for use, and the stability of system is higher, under the circumstances of guaranteeing smooth mud arrangement, simplifies the equipment, simplifies the processing procedure, not only can improve the stability of system, can also reduce construction and operating cost by a wide margin.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a grit material production wastewater treatment system and a wastewater treatment method, which can effectively treat production wastewater of a grit material processing field, recycle sand, transport mud cakes and recycle water, reduce 2 treatment units and a large amount of corresponding auxiliary equipment compared with the conventional treatment process, have low energy consumption and low operating cost, reduce the possibility of blockage, ensure the stable operation of the system and have obvious environmental protection benefit.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a grit material waste water processing system, including fine sand recovery unit, the equalizing basin, the 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 pipe-line mixer before getting into 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 dehydrated, the solid forms the mud cake, filtrating gets into the sedimentation tank, add the coagulant aid through the pipe-line mixer before getting into the plate and frame filter press, add the flocculating agent before getting into the sedimentation tank, the sedimentation tank deposits the back, sedimentation tank supernatant flows into the well pond, mud promotes to the equalizing basin through the second mud elevator pump, set up the moisturizing pipe on the well pond, the retrieval and utilization production plant's retrieval and utilization save the wash pipe in.
The sand and stone material production wastewater enters a fine sand recovery device through pressure flow or gravity flow.
The filtrating after plate and frame filter press dewaters along slot or pipeline, gets into the sedimentation tank through flowing automatically or sewage pump lift mode, and when adopting the pipeline, the filtrating adds the flocculating agent through the line mixer before advancing the sedimentation tank, and when adopting the slot, the filtrating adds the flocculating agent through the reaction tank before advancing the sedimentation tank.
The 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 of the first sludge lifting pump is obliquely cut and close to the stirrer and the central position of the bottom of the adjusting tank.
The number of the regulating tanks is at least 2, and the regulating tanks are designed in parallel.
The sedimentation tank is a horizontal flow sedimentation tank, a radial flow sedimentation tank or a vertical flow sedimentation tank.
A method for treating wastewater by adopting the grit material production wastewater treatment system comprises the following steps:
(1) the wastewater passes through a fine sand recovery device through pressure flow or gravity flow, the fine sand is recycled, the wastewater flows into a regulating tank through a pipeline, and a flocculating agent and a coagulant aid are added into the wastewater through a pipeline mixer before entering the regulating tank;
(2) after passing through the regulating tank, the wastewater is conveyed to a plate-and-frame filter press for dehydration through a first sludge lifting pump, 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 through a self-flow or sewage pump lifting mode, and a flocculating agent is added through a pipeline mixer reaction tank after a sewage pump and before entering the sedimentation tank;
(3) after the sludge is precipitated in the sedimentation tank, supernatant in the sedimentation tank flows into the middle water tank through gravity flow, and the sludge is lifted to the regulating tank through a second sludge lifting pump;
(4) and the clean water in the middle water tank is recycled for a sand and stone material production factory, and meanwhile, a back flush water pipe for returning the clean water in the middle water tank to the regulating tank is arranged, before the system is stopped, water is pumped from the middle water tank to the regulating tank, and the system is closed when the clean water circulates in each treatment unit and the content of mud and sand in the regulating tank is low.
The invention has the beneficial effects that: the production wastewater of grit material processing field can be effectively treated, fine sand is recycled, mud cakes are transported outside, the effluent is recycled up to standard, sewage recycling is realized, equipment is simplified, civil engineering is reduced, energy consumption is low, running cost is low, the possibility of blockage is reduced, stable running of a system is guaranteed, and environmental protection benefits are remarkable.
Drawings
FIG. 1 is a block diagram showing the construction of a wastewater treatment system for grit material production according to the present invention.
FIG. 2 is a flow chart of the method for treating wastewater from sandstone material production according to the present invention.
Detailed Description
The technical solution 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 obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the grit material production wastewater treatment system comprises a fine sand recovery device 1, an adjusting tank 8, a plate-and-frame filter press 5, a sedimentation tank 6 and a middle water tank 7, wherein the grit material production wastewater flows into the adjusting 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 adjusting tank 8, a stirrer is installed in the adjusting tank 8, the wastewater in the adjusting tank 8 is conveyed to the plate-and-frame filter press 5 through a pipeline through a first sludge lifting pump 4 for dehydration, solids form a mud cake, filtrate enters the sedimentation tank 6, the coagulant aid 3 is added through the pipeline mixer 9 before entering the plate-and-frame filter press 5, the flocculating agent 2 is added before entering the sedimentation tank 6, after sedimentation in the sedimentation tank 6, supernatant in the sedimentation tank 6 flows into the middle water tank 7, the sludge is lifted to the adjusting tank 8 through a second sludge lifting pump, a water replenishing pipe, A recycling pipe for recycling a production factory and a flushing water pipe which is connected back to the regulating tank.
The sand and gravel material production wastewater enters the fine sand recovery device 1 through pressure flow or gravity flow. The filtrating after plate and frame filter press 5 dewaters along slot or pipeline, gets into sedimentation tank 6 through flowing automatically or sewage pump lift mode, and when adopting the pipeline, the filtrating adds flocculating agent 2 through pipe-line mixer 9 before entering sedimentation tank 6, and when adopting the slot, the filtrating adds flocculating agent 2 through the reaction tank before entering sedimentation tank 6. The supernatant in the sedimentation tank 6 flows by gravity flow into the middle water tank 7. The water suction pipe of the first sludge lifting pump 4 is a straight pipe, and the inlet of the straight pipe is obliquely cut and is close to the stirrer and the central position of the bottom of the adjusting 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 horizontal flow sedimentation tank, a radial flow sedimentation tank or a vertical flow sedimentation tank.
As shown in FIG. 2, a method for wastewater treatment using the sandstone material production wastewater treatment system comprises the following steps:
(1) the wastewater passes through a fine sand recovery device through pressure flow or gravity flow, the fine sand is recycled, the wastewater flows into a regulating tank through a pipeline, and a flocculating agent and a coagulant aid are added into the wastewater through a pipeline mixer before entering the regulating tank;
(2) after passing through the adjusting tank, the wastewater is conveyed to a plate-and-frame filter press by a sludge lifting pump for dehydration, coagulant aid is added through a pipeline mixer before entering the plate-and-frame filter press, the wastewater passes through filter cloth, the solid is left on the filter cloth to form a mud cake, the mud cake is transported outwards, the filtrate enters a sedimentation tank by a self-flow or sewage pump lifting mode, and a flocculating agent is added through a pipeline mixer reaction tank after a sewage pump and before entering the sedimentation tank;
(3) after sedimentation in the sedimentation tank, supernatant in the sedimentation tank flows into a middle water tank through gravity flow, and sludge is lifted to a regulating tank through a sludge lifting pump;
(4) and the clean water in the middle water tank is recycled for a sand and stone material production factory, and meanwhile, a back flush water pipe for returning the clean water in the middle water tank to the regulating tank is arranged, before the system is stopped, water is pumped from the middle water tank to the regulating tank, and the system is closed when the clean water circulates in each treatment unit and the content of mud and sand in the regulating tank is low.
Through the steps, fine sand recycling of the sand and stone material production wastewater, outward transportation of mud cakes and standard-reaching recycling of effluent are realized.
The regulating reservoir is different from the conventional design in that the inlet of a first sludge lifting pump water suction pipe of the regulating reservoir is not provided with a downward elbow and a bell mouth, a water suction pipe is a straight pipe, the inlet is obliquely cut and is close to the mixer (0.3 m away from the central shaft of the mixer) and the central position of the bottom of the regulating reservoir (0.2 m away from the inner bottom of the regulating reservoir on the outer wall of the water suction pipe)
The plate-and-frame filter press is characterized in that waste water is filtered by a filter medium (filter cloth) under the action of pressure, solids stay on the filter cloth to form a mud cake, 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 adopt a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank and other forms. Different sedimentation tank water inlet modes are different, and the sedimentation tank water outlet is equipped with the water catch bowl, and the supernatant flows in the well pond through the water catch bowl, and the solid matter is stayed the bottom, and the sedimentation tank lower part is equipped with the mud fill, promotes to the equalizing basin through the mud elevator pump. When the sedimentation tank adopts multi-bucket sludge discharge, sludge needs to be discharged respectively, and an independent gate valve and a sludge discharge pipe are arranged.
Specifically, the wastewater enters the fine sand recovery device 1 through pressure flow or gravity flow, so that fine sand with the particle size of more than or equal to 0.15mm is recycled, and sand with the particle size of less than or equal to 0.15mm enters a regulating tank and a pump room. After passing through the fine sand recovery device 1, sand in the wastewater does not block a subsequent water pump, and does not break the filter cloth of the plate-and-frame filter press (5), so that the maintenance frequency is reduced, and the wastewater treatment can be continuously operated.
The regulating tank has the function of regulating water quality and water quantity, and the retention time of the regulating tank is more than or equal to the unit working time of the plate-and-frame filter press. Because the content of silt in the grit waste water is high and easy to harden, if the power of the stirrer is insufficient, the sludge is deposited, the tank capacity is reduced, the sludge discharge pipe is blocked, and the system cannot run continuously 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 regulation and continuous stirring are required to be determined according to the characteristics of the grit waste water. Because the sandstone wastewater treatment process equipment has higher failure rate, the number of the grids of the regulating tank is not less than 2, and the regulating tank is designed in parallel.
The equalizing basin is different from the conventional design in that the inlet of a water suction pipe (8) of a first sludge lifting pump (4) of the equalizing basin is not provided with a downward elbow and a horn mouth, the water suction pipe is a straight pipe and is close to a stirrer (0.3 m away from the central shaft of the stirrer) and the central position of the bottom of the equalizing basin, and the inlet of the water suction pipe is obliquely cut. If the import of the 4 inlet tubes of the first sludge elevator pump of equalizing basin 8 is like conventional design, have down elbow and horn mouth, block up the pipe water inlet that absorbs water very easily, equalizing basin elevator pump can't normally work, so cancel down elbow and horn mouth, a straight tube and be close to the mixer, be close equalizing basin bottom central point and put, the pipe import that absorbs water is chamfered, guarantees that the water inlet does not block up to guarantee the normal work of sludge pump.
The equalizing basin and the pump room are characterized in that the waste water has hardening property, if a submersible pump or a self-sucking pump is used, the water pump is easily blocked, so that the sludge pump cannot normally work, a dry type slurry pump is selected as the equalizing basin lift pump 4, an underground pump room must be established, and the long-time stable operation of the system is guaranteed.
The wastewater is directly sent to a plate-frame filter pressing workshop for dehydration through a regulating tank and a sludge lifting pump 4. The concentration of suspended solids in the production wastewater of the grit material processing system is very high, a flocculating agent 2(PAC) and a coagulant aid 3(PAM) are added before entering the regulating reservoir, and the coagulant aid 3(PAM) is added before entering a plate and frame filter press workshop after a regulating reservoir lifting pump to flocculate and precipitate sludge, so that the solid-liquid separation effect is good, and the solid-liquid separation can directly enter a plate and frame filter press 5 for dewatering. The process of the dehydration of the wastewater directly entering the plate-and-frame filter press 5 reduces 2 treatment units and a large amount of corresponding auxiliary equipment compared with the conventional treatment process, has low energy consumption and low operating 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 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 particle size of the sandstone wastewater is basically in the mu m level after passing through the fine sand recovery device 1, and most suspended matters can be intercepted through the filter cloth. Under the action of pressure, the wastewater is filtered by a filter medium (filter cloth), the solid stays on the filter cloth to form a mud cake, the water content of the mud cake is 25% -30%, the mud cake is transported outwards, the filtrate becomes clear liquid without the solid, 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 adopt a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank, an inclined tube sedimentation tank and other forms. The content of suspended matters in the filtrate after passing through the plate-and-frame filter press 5 is about dozens to hundreds of 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 the sludge is precipitated by the sedimentation tank, supernatant in the sedimentation tank flows into the reclaimed water tank through gravity flow, sludge is lifted to the regulating tank through the sludge lifting pump, and then the sludge is repeatedly treated by the process flow. The surface load of the sedimentation tank is 0.5-4.5m3/(m3H) design, the clay content in the sandstone material wastewater is high and low, the clay content is low or no high, and the settling time is designed according to 1.0-2.5 h.
The middle water tank 7 is used for adjusting the water yield difference caused by asynchronization of the water produced by the treatment system and the production water, and the clean water is reused in the sand and gravel material production factory. The intermediate water tank is also provided with a water replenishing pipe 10 and a flushing water pipe returning to the regulating tank. The water replenishing pipe 10 is used for compensating water brought away by sand and mud cakes generated by plate frame filter pressing in the process of flushing sand and stone materials. Because the grit waste water easily hardens the characteristic, can not have waste water in the equalizing basin, before the system stops transporting, need draw water to the equalizing basin from the pond, the clear water circulates to the equalizing basin in each processing unit and closes the system again when mud and sand content is less in the equalizing basin, the washing water pipe of back equalizing basin is used for washing the waste water that persists in equalizing basin and the affiliated facilities.
The above description is only a preferred embodiment of the present invention, and a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should be regarded as the protection scope of the present invention, and should not be regarded as limitations of the present invention, i.e. equivalent replacement modifications within this scope are also within the protection scope of the present invention, and each component which is not clear in the present embodiment can be implemented by using the existing technology.
Claims (8)
1. A grit material production wastewater treatment system is characterized by comprising a fine sand recovery device (1), an adjusting tank (8), a plate-and-frame filter press (5), a sedimentation tank (6) and a middle water tank (7), wherein the grit material production wastewater flows into the adjusting tank (8) through the fine sand recovery device (1) through a pipeline, a flocculating agent (2) and a coagulant aid (3) are added through a pipeline mixer (9) before entering the adjusting tank (8), a stirring machine is installed in the adjusting tank (8), the wastewater in the adjusting tank (8) is conveyed to the plate-and-frame filter press (5) through a pipeline by a first sludge lifting pump (4) for dehydration, solids form a mud cake, filtrate enters the sedimentation tank (6), the coagulant aid (3) is added through the pipeline mixer (9) before entering the plate-and-frame filter press (5), the flocculating agent (2) is added before entering the sedimentation tank (6), and the sedimentation tank (6) is sedimentated, supernatant in the sedimentation tank (6) flows into a reclaimed water tank (7), sludge is lifted to an adjusting tank (8) through a second sludge lifting pump, and a water replenishing pipe (10), a recycling pipe of a recycling production factory and a washing water pipe which is returned to the adjusting tank are arranged on the reclaimed water tank (7).
2. The grit material production wastewater treatment system as claimed in claim 1, wherein the grit material production wastewater enters the fine sand reclamation apparatus (1) by a pressure flow or a gravity flow.
3. The grit material production wastewater treatment system according to claim 1, wherein the filtrate after being dewatered by the plate and frame filter press (5) enters the sedimentation tank (6) along a channel or a pipeline in a self-flowing or sewage pump lifting manner, the flocculant (2) is added to the filtrate through the pipeline mixer (9) before the filtrate enters the sedimentation tank (6) when the pipeline is adopted, and the flocculant (2) is added to the filtrate through the reaction tank before the filtrate enters the sedimentation tank (6) when the channel is adopted.
4. The grit material production wastewater treatment system as claimed in claim 1, wherein the supernatant in the sedimentation tank (6) flows into the middle water tank (7) by gravity flow.
5. The sandstone material production wastewater treatment system as claimed in claim 1, wherein the suction pipe of the sludge lift pump (4) is a straight pipe, and the inlet is obliquely cut and is close to the stirrer and the central position of the bottom of the regulating tank.
6. The sandstone material production wastewater treatment system of claim 1 or 5, wherein the number of the regulating ponds is at least 2, and the regulating ponds are designed in parallel.
7. The grit material production wastewater treatment system as claimed in claim 1, wherein said sedimentation tank (6) is a horizontal flow sedimentation tank, a radial flow sedimentation tank or a vertical flow sedimentation tank.
8. A method of wastewater treatment using the grit material production wastewater treatment system as defined in any one of claims 1 to 7, comprising the steps of:
(1) the wastewater passes through a fine sand recovery device through pressure flow or gravity flow, the fine sand is recycled, the wastewater flows into a regulating tank through a pipeline, and a flocculating agent and a coagulant aid are added into the wastewater through a pipeline mixer before entering the regulating tank;
(2) after passing through the adjusting tank, the wastewater is conveyed to a plate-and-frame filter press by a sludge lifting pump for dehydration, coagulant aid is added through a pipeline mixer before entering the plate-and-frame filter press, the wastewater passes through filter cloth, solid is remained on the filter cloth to form mud cakes, the mud cakes are transported outwards, filtrate enters a sedimentation tank in a self-flow or sewage pump lifting mode, and flocculant is added through the pipeline mixer or a reaction tank after a sewage pump and before entering the sedimentation tank;
(3) after sedimentation in the sedimentation tank, supernatant in the sedimentation tank flows into a middle water tank through gravity flow, and sludge is lifted to a regulating tank through a sludge lifting pump;
(4) and the clean water in the middle water tank is recycled for a sand and stone material production factory, and meanwhile, a back flush water pipe for returning the clean water in the middle water tank to the regulating tank is arranged, before the system is stopped, water is pumped from the middle water tank to the regulating tank, and the system is closed when the clean water circulates in each treatment unit and the content of mud and sand 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 |
Applications Claiming Priority (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 |
Publications (2)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN117923740B (en) * | 2024-03-23 | 2024-06-21 | 河南威猛振动设备股份有限公司 | Continuous pulp disposal treatment system |
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