CN112723612A - Sewage pretreatment system and process - Google Patents
Sewage pretreatment system and process Download PDFInfo
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- CN112723612A CN112723612A CN202110127977.XA CN202110127977A CN112723612A CN 112723612 A CN112723612 A CN 112723612A CN 202110127977 A CN202110127977 A CN 202110127977A CN 112723612 A CN112723612 A CN 112723612A
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- 239000010865 sewage Substances 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 225
- 238000001914 filtration Methods 0.000 claims abstract description 126
- 238000012545 processing Methods 0.000 claims abstract description 58
- 238000001556 precipitation Methods 0.000 claims abstract description 55
- 238000004062 sedimentation Methods 0.000 claims abstract description 52
- 239000012535 impurity Substances 0.000 claims abstract description 32
- 238000005202 decontamination Methods 0.000 claims abstract description 27
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 27
- 238000012216 screening Methods 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 239000004575 stone Substances 0.000 claims description 45
- 239000004576 sand Substances 0.000 claims description 39
- 238000012546 transfer Methods 0.000 claims description 9
- 239000002351 wastewater Substances 0.000 claims description 5
- 239000004902 Softening Agent Substances 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 208000034699 Vitreous floaters Diseases 0.000 description 22
- 239000013049 sediment Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 238000005201 scrubbing Methods 0.000 description 7
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 229910001425 magnesium ion Inorganic materials 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000000126 substance Substances 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
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a sewage pretreatment system, which is used for sewage pretreatment and comprises a primary filtering treatment module, a secondary filtering treatment module and a sewage treatment module, wherein the primary filtering treatment module comprises a centrifugal filtering component and generates primary filtering water; the secondary filtering treatment module comprises a secondary screening filtering component to generate secondary filtered water; the ramp sedimentation treatment module is used for removing flocculent impurities in the secondary filtered water to obtain decontamination sedimentation water; the hardness adjusting and processing module is used for adjusting the hardness of the decontamination precipitation water to obtain pretreated output water; wherein, centrifugal filtration subassembly includes the floater remover, through with upper floater propelling movement to floater collecting vat removes the upper floater in the sewage. By adopting the technical scheme, the efficiency of filtering and removing impurities in sewage pretreatment can be effectively improved, and the formation of precipitates in subsequent sewage treatment to block treatment equipment is avoided by adjusting the hardness of sewage, so that the efficiency of the subsequent sewage treatment is effectively improved.
Description
Technical Field
The invention relates to the field of sewage pretreatment, in particular to a sewage pretreatment system and a sewage pretreatment process.
Background
Along with the continuous expansion of the urban scale, the water consumption and the water discharge of the city are continuously increased, the shortage of water resources and the water quality pollution are more severe, the water environment problem is increasingly prominent, and a high-efficiency sewage treatment system must be formed to solve the problem. The sewage pretreatment in the sewage treatment system is a pretreatment process which is set according to the requirements of a subsequent treatment process on water quality before the sewage enters the traditional sedimentation, biological treatment and the like, and is a throat for performing the subsequent formal treatment on the sewage. The existing sewage pretreatment process generally only carries out simple precipitation filtration on sewage, can only remove large-particle impurities in sewage, and cannot effectively remove small-particle impurities and flocculent impurities in the sewage, so that more fine grid slag in the sewage after pretreatment is caused, and the loss of the sewage subsequent treatment equipment is large. Simultaneously, the preliminary edulcoration operation is only carried out to sewage mostly to current sewage pretreatment process, still contains more calcium ion, magnesium ion etc. and easily forms the material composition of incrustation scale in the sewage after the preliminary treatment, and the hardness of sewage is higher, thereby easily forms incrustation scale deposit and causes treatment facility's jam in the subsequent processing of sewage, and the loss sewage treatment facility hinders sewage treatment's progress, increases sewage treatment's cost.
Therefore, the conventional sewage pretreatment system and method cannot efficiently remove impurities in sewage, and cannot effectively avoid the problem that the impurities in the subsequent sewage treatment block treatment equipment, so that the efficient propulsion of the whole sewage treatment process is not facilitated, and the manpower loss and material resource loss of the whole sewage treatment process are difficult to reduce.
Disclosure of Invention
An object of the present invention is to provide a sewage pretreatment system which can effectively solve the defects in the existing sewage pretreatment, and particularly, a sewage pretreatment system for sewage pretreatment, comprising: the first-stage filtering treatment module comprises a centrifugal filtering component, the centrifugal filtering component is used for carrying out centrifugal filtering treatment on sewage, and the sewage is layered into an upper-layer floating object, middle-layer filtering water and a bottom-layer sand stone object, so that first-stage filtering water is obtained; the secondary filtering processing module is arranged at the downstream of the primary filtering processing module and is communicated with the primary filtering processing module, the secondary filtering processing module comprises a secondary screening filtering component, and the secondary screening filtering component carries out secondary screening filtering processing on the primary filtered water to obtain secondary filtered water; the ramp sedimentation processing module is arranged at the downstream of the secondary filtration processing module, the ramp sedimentation processing module is communicated with the secondary filtration processing module, and the ramp sedimentation processing module removes flocculent impurities in the secondary filtration water to obtain decontamination precipitation water; the hardness adjusting module is arranged at the downstream of the ramp sedimentation processing module, is communicated with the ramp sedimentation processing module, and adjusts the hardness of the decontamination sedimentation water to obtain pretreated output water; wherein, centrifugal filtration subassembly includes the floater remover, and the isometric expansion concertina movement of floater remover is with upper floater propelling movement to floater collecting vat, upper floater in the removal sewage.
According to an embodiment of the invention, a centrifugal filter assembly comprises: a primary filter tank, which is used for bearing sewage; the primary filtered water collecting tank is arranged at the downstream of the primary filter tank and collects the middle-layer filtered water; the sand and stone collecting tank is arranged at the downstream of the primary filter tank and is arranged at a position deviating from the primary filtering water collecting tank, and the sand and stone collecting tank collects sand and stone objects at the bottom layer; the centrifugal shaft is vertically arranged in the center of the bottom of the primary filter tank, and the first end part of the centrifugal shaft is fixedly connected with the center of the bottom of the primary filter tank; the floater remover is fixedly connected with a second end part of the centrifugal shaft, which deviates from the bottom of the primary filter tank; the floater collecting tank is annularly arranged on the outer side of the tank opening of the primary filter tank and is detachably connected with the outer side of the tank opening of the primary filter tank; the primary filter plate is horizontally and fixedly arranged at the bottom of the primary filter tank; the middle-layer filtering water diversion channel is arranged at the bottom of the primary filtering tank and communicated with the inner space and the outer space at the bottom of the primary filtering tank, and the middle-layer filtering water is diverted to the primary filtering water collecting tank to obtain primary filtering water; the sand and stone conveying channel is arranged at the bottom of the primary filter tank, is communicated with the inner space and the outer space at the bottom of the primary filter tank, and conveys the sand and stone objects at the bottom layer to a sand and stone object collecting tank; and the channel switcher is arranged at the bottom of the primary filter tank, and is used for selecting at most one from the middle-layer filtered water diversion channel and the sand and stone object conveying channel to be communicated with the primary filter tank and controlling the conveying of the middle-layer filtered water and the bottom-layer sand and stone objects.
According to the embodiment of the invention, the secondary screening and filtering component adopts a grid structure to carry out secondary screening and filtering treatment on the primary filtered water to obtain secondary filtered water.
According to an embodiment of the invention, the ramp sedimentation processing module comprises: the slope angle of the first precipitation slope is 45 degrees, and the secondary filtered water flows slowly through the first precipitation slope to obtain first intermediate water; the second precipitation slope is arranged at the downstream of the first precipitation slope, the slope angle of the second precipitation slope is smaller than 45 degrees, and the first intermediate water flows slowly through the second precipitation slope to obtain decontamination precipitation water; and the middle water conveying assembly is arranged between the first precipitation slope and the second precipitation slope and is used for receiving the first middle water and conveying the first middle water to the second precipitation slope.
According to the embodiment of the invention, the hardness adjusting treatment module is used for adding a water softening agent into the decontamination precipitation water, reducing the hardness of the decontamination precipitation water and generating the pretreated output water.
The invention also discloses a sewage pretreatment process, which comprises the following steps: s1, performing primary centrifugal filtration treatment on the sewage through a primary filtration treatment module to obtain primary filtered water; s2, performing secondary screening and filtering treatment on the primary filtered water through a secondary filtering treatment module to obtain secondary filtered water; s3, removing flocculent impurities in the secondary filtered water through a ramp sedimentation processing module to obtain decontamination sedimentation water; s4, adjusting the hardness of the decontamination precipitation water through a hardness adjusting module to obtain pretreated output water; wherein, the first-stage centrifugal filtration treatment in the step of S1 specifically comprises the following steps: the centrifugal shaft rotates to drive sewage to be centrifugally separated, the sewage is divided into upper-layer floaters, middle-layer filtered water and bottom-layer sand and stone objects, and the upper-layer floaters are pushed to a floatercollecting tank by the floaters remover and are removed from the upper-layer floaters in the sewage.
According to an embodiment of the present invention, the step of S1 includes: s101, inputting pretreated input water into a primary filter tank in a primary filtering treatment module; s102, rotating a centrifugal shaft in the primary filter tank, wherein the centrifugal shaft drives sewage in the primary filter tank to rotate, and further performing centrifugal separation on pretreatment input water, and the pretreatment input water in the primary filter tank is layered into an upper-layer floating object, a middle-layer primary filter water and a bottom-layer sand stone object; s103, carrying out equal-ratio expansion on the floater remover from the center of the primary filter along the direction of the wall of the primary filter, pushing the upper-layer floater to a floater collecting tank, and then contracting the floater remover from the wall of the primary filter to the center of the primary filter in an equal-ratio manner; s104, opening a middle-layer filtered water diversion channel positioned at the bottom of the primary filter tank, and diverting the middle-layer primary filtered water to a primary filtered water collecting tank to obtain primary filtered water; and S105, operating the channel switcher to close the middle-layer filtered water diversion channel, opening the sand and stone object conveying channel and conveying the bottom-layer sand and stone objects into the sand and stone object collecting tank.
According to an embodiment of the present invention, the secondary filtered water is generated by subjecting the primary filtered water to a secondary sifting filtering process using a grill member in step S2.
According to the embodiment of the invention, in the ramp sedimentation processing module, the secondary filtered water is conveyed to the first sedimentation slope, flocculent impurities in the secondary filtered water are subjected to primary sedimentation to obtain first intermediate water, the intermediate water conveying assembly conveys the first intermediate water to the second sedimentation slope, and the flocculent impurities in the first sedimentation intermediate water are subjected to secondary sedimentation to obtain the decontamination sedimentation water in step S3.
According to an embodiment of the present invention, the hardness of the desmutted precipitated water is reduced by adding a water softener to the desmutted precipitated water in the hardness adjustment processing module in step S4, generating a pre-treatment output.
By adopting the technical scheme, the invention mainly has the following technical effects:
1. through carrying out centrifugal filtration in one-level filtration processing module and handling, can stratify the impurity in the sewage fast, effectively improved the filter velocity of sewage preliminary treatment in-process.
2. Through set up the floater remover in one-level filter module, can get rid of upper floater propelling movement to floater collecting vat in the sewage high-efficient conveniently for the processing speed of upper floater in the sewage has effectively reduced the human cost of artifical salvage.
3. Through setting up the less sediment slope of a plurality of slope angles in succession in the scrubbing sediment module for flocculent debris in the sewage progressively precipitate when sewage is the slow flow in proper order through a plurality of sediment slopes, can effectively remove flocculent debris in the sewage, reach the effect to the further edulcoration of sewage, reduced the edulcoration degree of difficulty of the follow-up processing of sewage, and the scrubbing sediment module simple structure has avoided practical application's the configuration degree of difficulty.
Drawings
Fig. 1 is a first schematic view of a sewage pretreatment system according to an embodiment of the present invention;
fig. 2 is a second schematic view of a sewage pretreatment system according to an embodiment of the present invention;
fig. 3 is a third schematic view of a sewage pretreatment system according to an embodiment of the present invention;
fig. 4 is a fourth schematic view of a sewage pretreatment system according to an embodiment of the present invention;
fig. 5 is a first schematic diagram of a wastewater pretreatment process according to an embodiment of the invention.
In the figure: 1. a primary filtering processing module; 11. a centrifugal filter assembly; 1101. a primary filter tank; 1102. a first-stage filtered water collecting tank; 1103. a gravel and stone collecting tank; 1104. a centrifugal shaft; 1105. a float remover; 1106. a floater collecting tank; 1107. primary filter plate; 1108. the middle layer filters the water diversion channel; 1109. a gravel and stone material conveying passage; 1110. a channel switcher; 2. a secondary filtering processing module; 21. a secondary screening filter assembly; 3. a ramp sedimentation processing module; 31. a first precipitation slope; 32. a second precipitation slope; 33. an intermediate water transfer assembly; 4. and a hardness adjusting and processing module.
Detailed Description
The following description of the embodiments of the present invention is provided in connection with the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention discloses a sewage pretreatment system, which includes a primary filtration treatment module 1, a secondary filtration treatment module 2, a ramp sedimentation treatment module 3, and a hardness adjustment treatment module 4. The primary filtering treatment module 1, the secondary filtering treatment module 2, the ramp sedimentation treatment module 3 and the hardness adjusting treatment module 4 are arranged along the treatment direction of sewage, and the sewage is pretreated along the primary filtering treatment module 1, the secondary filtering treatment module 2, the ramp sedimentation treatment module 3 and the hardness adjusting treatment module 4 in sequence.
Referring to fig. 1 to 3, the primary filtering module 1 is used to remove large-particle impurities in sewage, and in order to rapidly centrifuge and filter the large-particle impurities in sewage, in this embodiment, the centrifugal filtering component 11 is disposed in the primary filtering module, and the sewage is centrifuged and filtered by the centrifugal filtering component 11, and is layered into an upper-layer floating material, a middle-layer filtered water and a bottom-layer sand-stone material, so as to complete primary filtering of sewage, and obtain a primary filtered water.
In order to improve the efficiency of centrifugal filtration in the primary filtration treatment module 1 and simplify the assembly of the centrifugal filtration assembly 11, the centrifugal filtration assembly 11 in this embodiment includes a primary filter tank 1101, a primary filtration water collection tank 1102, a sand and gravel collection tank 1103, a centrifugal shaft 1104, a float remover 1105, a float collection tank 1106, a primary filter plate 1107, a middle filtration water diversion passage 1108, a sand and gravel delivery passage 1109, and a passage switcher 1110.
In this embodiment, the primary filter tank 1101 is used for holding externally inputted sewage, and the sewage is subjected to centrifugal filtration treatment in the primary filter tank 1101. In order to collect the primary filtered water treated by the primary filtering treatment module 1, the primary filtered water collecting tank 1102 is provided in the present embodiment, and the primary filtered water collecting tank 1102 is provided downstream of the primary filter tank 1101.
In this embodiment, the gravel and stone collecting groove 1103 uniformly collects the bottom layer gravel and stone obtained by centrifugal filtration, and the gravel and stone collecting groove 1103 is disposed at the downstream of the primary filter 1101, so as to collect the primary filtered water and the gravel and stone by classification, and in this embodiment, the gravel and stone collecting groove 1103 is disposed at a position away from the primary filtered water collecting tank 1102.
In this embodiment, the centrifugal shaft 1104 is used for performing centrifugal treatment on sewage, the centrifugal shaft 1104 is vertically disposed at the center of the bottom of the primary filter 1101, and a first end (not shown) of the centrifugal shaft 1104 is fixedly connected to the center of the bottom of the primary filter 1101.
The floater remover 1105 in this embodiment can conveniently and efficiently remove the upper floaters after centrifugation, reduce the labor cost, and improve the automation of the operation. In order to directly contact the upper floating objects, in the present embodiment, the floating object remover 1105 is fixedly connected to a second end (not shown) of the centrifugal shaft 1104, which is away from the primary filter tank 1101, and the upper floating objects are pushed from the center of the primary filter tank 1101 to the periphery of the primary filter tank 1101 by the isometric expansion and contraction of the floating object remover 1105. In order to collect the upper flotage by matching with the flotage remover 1105, the flotage collecting tank 1106 is provided around the outside of the mouth of the primary filter 1101 in this embodiment, and the flotage remover 1105 pushes the upper flotage to the peripheral edge of the primary filter 1101, so as to collect the upper flotage to the flotage collecting tank 1106. In order to facilitate the cleaning of the float collecting tank 1106 by an operator, the float collecting tank 1106 is detachably connected to the outside of the mouth of the primary filter 1101 in this embodiment.
The primary filter plate 1107 is used for avoiding the middle layer filtering water diversion channel 1108 and the grit thing conveying channel 1109 at the bottom of the primary filter tank 1101 by the bottom layer grit thing, in this embodiment, the primary filter plate 1107 is horizontally fixed at the bottom of the primary filter tank 1101, the primary filter plate 1107 isolates the bottom layer grit thing and blocks the upper space of the primary filter plate 1107, the middle layer filtering water flows through the gap of the bottom layer grit thing, and then flows through the primary filter plate 1107 and enters the lower space of the primary filter plate 1107 in the primary filter tank 1101.
In this embodiment, the middle layer filtered water flow guide passage 1108 collects middle layer filtered water into the first-stage filtered water collecting tank 1102, and the middle layer filtered water flow guide passage 1108 is disposed at the bottom of the primary filter tank 1101 and is communicated with the inner space and the outer space of the bottom of the primary filter tank 1101 to guide the middle layer filtered water to the first-stage filtered water collecting tank 1102, so as to obtain first-stage filtered water.
Bottom layer grit thing transfer passage 1109 is used for collecting bottom layer grit thing to grit thing collecting groove 1103 in this embodiment, and grit thing transfer passage 1109 is seted up at the bottom of the pool of primary filter 1101, and the inside and outside space in primary filter 1101 bottom of UNICOM conveys bottom layer grit thing to grit thing collecting groove 1103.
In this embodiment, the channel switch 1110 is used to control the independent transmission of the middle layer filtered water and the bottom layer aggregate, the channel switch 1110 is disposed at the bottom of the primary filter 1101, and the channel switch 1110 is used to select at most one of the middle layer filtered water diversion channel 1108 and the aggregate transport channel 1109 to communicate with the primary filter 1101.
The secondary filtering processing module 2 in this embodiment is configured to further remove small suspended particles in the primary filtered water, the secondary filtering processing module 2 is disposed at the downstream of the primary filtering processing module 1 and is communicated with the primary filtering processing module 1, and the secondary filtering processing module 2 receives and processes the primary filtered water to obtain secondary filtered water. In order to remove small suspended particles in the secondary filtered water rapidly and massively, in this embodiment, the secondary screening and filtering component 21 is disposed in the secondary filtering and processing module 2, and the secondary screening and filtering component 21 may include a grating component, a permeable membrane component, a filter screen component, and the like. Specifically, the grid structure can adopt metal grid structures such as a strand-rotating grid structure, a stepped grid structure and a rotary grid structure, and in order to reduce the installation difficulty of the grid structure and improve the corrosion resistance of the grid structure, preferably, the grid structure in the embodiment adopts a glass fiber reinforced plastic grid structure.
Referring to fig. 4, the ramp precipitation processing module 3 in this embodiment is used for further removing flocculent impurities in the secondary filtered water, the ramp precipitation processing module 3 is disposed at the downstream of the secondary filtering processing module 2 and is communicated with the secondary filtering processing module 2, and the ramp precipitation processing module 3 receives and processes the secondary filtered water to remove flocculent impurities in the secondary filtered water, so as to obtain the decontamination precipitation water. In order to make the flocculent debris in the secondary filter aquatic fully to precipitate, a plurality of sediment slopes have been set up in succession at ramp sedimentation processing module 3 in this implementation, in order to improve the utilization ratio in sewage pretreatment's place, balanced sewage pretreatment cost, preferably, set up first sediment slope 31 and second in this embodiment and precipitated slope 32, the secondary filter water flows through first sediment slope 31 and second in proper order and deposits slope 32, through twice unhurried current process, precipitate the flocculent debris in the secondary filter aquatic, obtain the scrubbing sediment water. In order to reduce the flow rate of the second-stage filtered water in the first precipitation slope 31 and improve the precipitation efficiency of flocculent impurities in the second-stage filtered water, the slope angle of the first precipitation slope 31 is set to 45 degrees, and the second-stage filtered water passes through the first precipitation slope 31 slowly to obtain first intermediate water. In the embodiment, the second precipitation slope 32 is arranged at the downstream of the first precipitation slope 31, the slope angle of the second precipitation slope 32 is smaller than 45 degrees, and the first intermediate water is slowly flowed through the second precipitation slope 32 to obtain the decontamination precipitation water. In order to ensure that the first intermediate water can be transferred to the second precipitation slope 32, an intermediate water transfer assembly 33 is provided between the first precipitation slope 31 and the second precipitation slope 32 in the present embodiment, and the intermediate water transfer assembly 33 receives the first intermediate water and transfers the first intermediate water to the second precipitation slope 32, and the intermediate water transfer assembly 33 in the present embodiment adopts a water pump related structure.
Thereby hardness adjusting module in this embodiment is arranged in reducing the hardness of scrubbing sediment water and forms the incrustation scale in reducing sewage subsequent treatment and cause the jam to sewage treatment device, hardness adjusting module sets up the low reaches at ramp sedimentation processing module 3 in this embodiment, and with ramp sedimentation processing module 3 UNICOM, hardness adjusting module 4 receives and handles the scrubbing sediment water, reduce the calcium ion in the scrubbing sediment water, the content of the material composition of the easy incrustation scale that forms such as magnesium ion, thereby reduce the hardness of scrubbing sediment water. In the embodiment, the water softener is added in proportion to convert and precipitate calcium ions, magnesium ions and other substance components, so that the hardness of the decontamination precipitation water is reduced, and in the embodiment, the water softener can adopt soda ash, phosphate, NTA nitrilotriacetate, ethylene diamine tetraacetic acid and the like.
Referring to fig. 5, an embodiment of the invention further discloses a sewage pretreatment process, which includes the following steps:
s1, performing primary centrifugal filtration treatment on the sewage through a primary filtration treatment module 1 to obtain primary filtered water;
s2, performing secondary screening and filtering treatment on the primary filtered water through a secondary filtering treatment module 2 to obtain secondary filtered water;
s3, removing flocculent impurities in the secondary filtered water through the ramp sedimentation processing module 3 to obtain decontamination sedimentation water; and
s4, adjusting the hardness of the decontamination precipitation water through a hardness adjusting module 4 to obtain pretreated output water;
wherein, the first-stage centrifugal filtration treatment in the step of S1 specifically comprises the following steps: the centrifugal shaft 1104 rotates to drive sewage to be centrifugally separated, the sewage is divided into upper-layer floating objects, middle-layer filtered water and bottom-layer sand and stone objects, the upper-layer floating objects are pushed to the floating object collecting tank 1106 by the floating object remover 1105, and the upper-layer floating objects in the sewage are removed.
In the step S1, the sewage enters the primary filtering treatment module 1, and large particles in the sewage are removed by centrifugal filtering treatment to obtain primary filtered water. In the step S2, the first-stage filtered water enters the second-stage filtering processing module 2, and the second-stage filtering processing is performed to remove small particles and impurities in the sewage, thereby obtaining second-stage filtered water. And in the step S3, the secondary filtered water enters a ramp precipitation module to remove flocculent impurities in the secondary filtered water, so that the decontamination precipitation water is obtained. And in the step S4, the decontamination precipitation water enters a hardness adjusting module to reduce the hardness of the current decontamination precipitation water to obtain pretreated output water.
Specifically, the step S1 includes:
s101, inputting pretreatment input water into a primary filter tank 1101 in the primary filter treatment module 1;
s102, rotating a centrifugal shaft 1104 in the primary filter 1101, wherein the centrifugal shaft 1104 drives sewage in the primary filter 1101 to rotate, so that the sewage is centrifugally separated, and pretreated input water in the primary filter 1101 is layered into an upper-layer floating object, a middle-layer primary filter water and a bottom-layer sand stone object;
s103, expanding the floating object remover 1105 in an equal ratio from the center of the primary filter tank 1101 along the direction of the tank wall of the primary filter tank 1101, pushing the upper layer of floating objects to the tank wall of the primary filter tank 1101 so as to push the upper layer of floating objects to the floating object collecting tank 1106, and contracting the floating object remover 1105 in an equal ratio from the tank wall of the primary filter tank 1101 to the center of the primary filter tank 1101;
s104, opening a middle-layer filtered water diversion channel 1108 positioned at the bottom of the primary filter 1101, and diverting the middle-layer primary filtered water to a primary filtered water collection tank 1102 to obtain primary filtered water; and
s105, operating the channel switch 1110 to close the middle filtering water diversion passage 1108, opening the sand and stone object conveying passage 1109, and conveying the bottom sand and stone objects into the sand and stone object collecting tank 1103.
In step S102, in order to increase the speed of layering impurities in the sewage pretreatment, in this embodiment, the centrifugal shaft 1104 in the primary filter 1101 rotates to drive the sewage in the primary filter 1101 to rotate, so that the primary filter 1101 performs centrifugal motion, and finally the impurities are layered into an upper-layer floating material, a middle-layer filtered water and a bottom-layer sand and stone material. In step S103, in order to reduce the cost of manually salvaging the upper-layer floating objects and improve the automation operation in the sewage pretreatment, in this embodiment, the floating object remover 1105 performs equal-ratio expansion from the center of the primary filter tank 1101 along the direction of the tank wall of the primary filter tank 1101, and pushes the upper-layer floating objects toward the tank wall of the primary filter tank 1101, so as to push the upper-layer floating objects into the floating object collecting tank 1106, thereby completing the upper-layer floating object removing and collecting process once, the floating object remover 1105 further contracts from the tank wall of the primary filter tank 1101 toward the center of the primary filter tank 1101 at equal ratio, and the floating object remover 1105 returns to the original position to prepare for removing the next upper-layer floating objects. In step S105, after the upper-layer floating objects are removed, the channel switching device 1110 is operated, the middle-layer filtered water diversion passage 1108 is opened, the middle-layer filtered water is diverted to the first-stage filtered water collection tank 1102, the channel switching device 1110 is operated again, the sand and stone object conveying passage 1109 is opened, and the bottom-layer sand and stone objects are conveyed to the sand and stone object collection tank 1103.
In order to further get rid of the tiny particle impurity of one-level filtration aquatic, still carried out second grade screening filtration to one-level filtration water in this embodiment, in order to improve the efficiency that second grade filtration screened, reduce the clearance degree of difficulty, this embodiment adopts the grid subassembly to carry out second grade screening filtration.
In order to further remove flocculent impurities in the secondary filtered water, in the present embodiment, in step S3, in the ramp sedimentation treatment module 3, the secondary filtered water is conveyed to the first sedimentation slope 31, flocculent impurities in the secondary filtered water are subjected to primary sedimentation to obtain first intermediate water, the intermediate water conveying assembly 33 conveys the first intermediate water to the second sedimentation slope 32, and flocculent impurities in the first sedimentation intermediate water are subjected to secondary sedimentation to obtain decontamination sedimentation water.
In order to further adjust the hardness of the desmutting precipitated water, in the present embodiment, the hardness of the desmutting precipitated water is reduced by adding a water softening agent to the desmutting precipitated water in the hardness adjustment processing module 4 in step S4, and a pre-treatment output is generated.
The embodiment of the invention discloses a sewage pretreatment process and a sewage pretreatment system, by adopting the sewage pretreatment process and the sewage pretreatment system in the embodiment, the removal performance of large-particle impurities and small-particle flocculent impurities in sewage pretreatment can be effectively improved, the treatment speed of sewage pretreatment is accelerated, the hardness of sewage can be effectively adjusted, the problem of blockage in sewage subsequent treatment caused by precipitation and scaling is solved, the service life of sewage subsequent treatment equipment is prolonged, and the working efficiency of sewage subsequent treatment is improved.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
Claims (10)
1. A sewage pretreatment system for sewage pretreatment, comprising:
the first-stage filtering treatment module comprises a centrifugal filtering component, the centrifugal filtering component is used for carrying out centrifugal filtering treatment on sewage, and the sewage is layered into an upper-layer floating object, a middle-layer filtering water and a bottom-layer sand stone object, so that first-stage filtering water is obtained;
the secondary filtering processing module is arranged at the downstream of the primary filtering processing module and is communicated with the primary filtering processing module, the secondary filtering processing module comprises a secondary screening filtering component, and the secondary screening filtering component carries out secondary screening filtering processing on the primary filtered water to obtain secondary filtered water;
the ramp sedimentation processing module is arranged at the downstream of the secondary filtration processing module, is communicated with the secondary filtration processing module, and removes flocculent impurities in the secondary filtration water to obtain decontamination precipitation water; and
the hardness adjusting module is arranged at the downstream of the ramp sedimentation processing module, is communicated with the ramp sedimentation processing module, and adjusts the hardness of the decontamination sedimentation water to obtain pretreated output water;
the centrifugal filtering component comprises a floater remover, the floater remover performs equal-ratio expansion and telescopic motion, the upper-layer floater is pushed to a floater collecting tank, and the upper-layer floater in the sewage is removed.
2. The sewage pretreatment system of claim 1, wherein:
the centrifugal filter assembly includes:
the primary filter tank is used for bearing the sewage;
the primary filtered water collecting tank is arranged at the downstream of the primary filter tank and collects the middle-layer filtered water;
the sand and stone collecting tank is arranged at the downstream of the primary filter tank and is arranged at a position deviating from the primary filtered water collecting tank, and the sand and stone collecting tank collects the sand and stone objects at the bottom layer;
the centrifugal shaft is vertically arranged at the center of the bottom of the primary filter tank, and the first end part of the centrifugal shaft is fixedly connected with the center of the bottom of the primary filter tank;
the floater remover is fixedly connected with a second end part of the centrifugal shaft, which deviates from the bottom of the primary filter tank;
the floater collecting tank is annularly arranged on the outer side of the mouth of the primary filter tank and is detachably connected with the outer side of the mouth of the primary filter tank;
the primary filter plate is horizontally and fixedly arranged at the bottom of the primary filter tank;
the middle-layer filtering water diversion channel is arranged at the bottom of the primary filtering tank and communicated with the inner space and the outer space at the bottom of the primary filtering tank, and the middle-layer filtering water is diverted to the primary filtering water collection tank to obtain primary filtering water;
the sand and stone object conveying channel is arranged at the bottom of the primary filter tank, is communicated with the inner space and the outer space at the bottom of the primary filter tank, and conveys the sand and stone objects at the bottom layer to the sand and stone object collecting tank; and
the channel switcher is arranged at the bottom of the primary filter tank, and is used for selecting at most one of the middle-layer filtered water diversion channel and the sand and stone object conveying channel to be communicated with the primary filter tank so as to control the conveying of the middle-layer filtered water and the bottom sand and stone objects.
3. The sewage pretreatment system of claim 1, wherein:
and the secondary screening and filtering component adopts a grid structure to carry out secondary screening and filtering treatment on the primary filtered water to obtain the secondary filtered water.
4. The sewage pretreatment system of claim 1, wherein:
the ramp sedimentation processing module comprises:
the slope angle of the first precipitation slope is 45 degrees, and the secondary filtered water slowly flows through the first precipitation slope to obtain first intermediate water;
the second precipitation slope is arranged at the downstream of the first precipitation slope, the slope angle of the second precipitation slope is smaller than 45 degrees, and the first intermediate water slowly flows through the second precipitation slope to obtain decontamination precipitation water; and
the middle water conveying assembly is arranged between the first sedimentation slope and the second sedimentation slope and used for receiving the first middle water and conveying the first middle water to the second sedimentation slope.
5. The sewage pretreatment system of claim 1, further comprising:
the hardness adjusting and processing module is used for adding a water softening agent into the sewage removal precipitation water, reducing the hardness of the sewage removal precipitation water and generating the pretreated output water.
6. A sewage pretreatment process for sewage pretreatment, characterized by comprising the steps of:
s1, performing primary centrifugal filtration treatment on the sewage through a primary filtration treatment module to obtain primary filtered water;
s2, performing secondary screening and filtering treatment on the primary filtered water through a secondary filtering treatment module to obtain secondary filtered water;
s3, removing flocculent impurities in the secondary filtered water through a ramp sedimentation processing module to obtain decontamination sedimentation water; and
s4, adjusting the hardness of the decontamination precipitation water through a hardness adjusting module to obtain pretreated output water;
wherein the first-stage centrifugal filtration treatment in the step S1 is specifically: the centrifugal shaft rotates to drive the sewage to be centrifugally separated, the sewage is divided into an upper-layer floating object, middle-layer filtered water and a bottom-layer sand stone object, the upper-layer floating object is pushed to a floating object collecting tank by the floating object remover, and the upper-layer floating object in the sewage is removed.
7. The wastewater pretreatment process of claim 6, wherein:
the step of S1 includes:
s101, inputting the pretreatment input water into a primary filter tank in the primary filter treatment module;
s102, rotating a centrifugal shaft in the primary filter tank, wherein the centrifugal shaft drives sewage in the primary filter tank to rotate, so that the sewage is centrifugally separated, and the pretreated input water in the primary filter tank is layered into the upper-layer floating object, the middle-layer primary filter water and the bottom-layer sand stone object;
s103, the floater remover expands in an equal ratio from the center of the primary filter along the direction of the wall of the primary filter, pushes the upper-layer floater to a floater collecting tank, and contracts in an equal ratio from the wall of the primary filter to the center of the primary filter;
s104, opening a middle-layer filtered water diversion channel positioned at the bottom of the primary filter tank, and diverting the middle-layer primary filtered water to a primary filtered water collecting tank to obtain primary filtered water; and
and S105, operating the channel switcher to close the middle-layer filtering water diversion channel, opening the sand and stone object conveying channel and conveying the bottom-layer sand and stone objects into the sand and stone object collecting tank.
8. The wastewater pretreatment process of claim 6, wherein:
in the step S2, the primary filtered water is subjected to a secondary screening and filtering process by using a grid assembly to generate the secondary filtered water.
9. The wastewater pretreatment process of claim 6, wherein:
in the step S3, in the ramp sedimentation processing module, the secondary filtered water is transferred to a first sedimentation slope, flocculent impurities in the secondary filtered water are subjected to primary sedimentation to obtain first intermediate water, the intermediate water transfer module transfers the first intermediate water to a second sedimentation slope, and the flocculent impurities in the first sedimentation intermediate water are subjected to secondary sedimentation to obtain the decontamination sedimentation water.
10. The wastewater pretreatment process of claim 6, wherein:
and in the step S4, adding a water softening agent into the decontamination precipitation water in the hardness adjustment processing module to reduce the hardness of the decontamination precipitation water, so as to generate the pre-treatment output water.
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Application publication date: 20210430 |