CN211419896U - Urban sewage treatment system - Google Patents
Urban sewage treatment system Download PDFInfo
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- CN211419896U CN211419896U CN201921223935.0U CN201921223935U CN211419896U CN 211419896 U CN211419896 U CN 211419896U CN 201921223935 U CN201921223935 U CN 201921223935U CN 211419896 U CN211419896 U CN 211419896U
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- 239000010865 sewage Substances 0.000 title claims abstract description 96
- 238000011282 treatment Methods 0.000 title claims abstract description 63
- 239000010802 sludge Substances 0.000 claims abstract description 91
- 238000006243 chemical reaction Methods 0.000 claims abstract description 50
- 238000004062 sedimentation Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 239000008213 purified water Substances 0.000 claims abstract description 18
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000460 chlorine Substances 0.000 claims abstract description 10
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 10
- 238000005273 aeration Methods 0.000 claims description 25
- 230000015271 coagulation Effects 0.000 claims description 23
- 238000005345 coagulation Methods 0.000 claims description 23
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 22
- 239000004155 Chlorine dioxide Substances 0.000 claims description 11
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 11
- 239000000701 coagulant Substances 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 4
- 238000005660 chlorination reaction Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 208000005156 Dehydration Diseases 0.000 description 9
- 230000018044 dehydration Effects 0.000 description 9
- 238000006297 dehydration reaction Methods 0.000 description 9
- 229920002401 polyacrylamide Polymers 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 208000034699 Vitreous floaters Diseases 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 229910052755 nonmetal Inorganic materials 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000012024 dehydrating agents Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model discloses an urban sewage treatment system relates to sewage treatment system, including sewage inlet tube, preliminary treatment filter equipment, FCR reaction tank unit, sedimentation tank, sludge treatment equipment, fibre carousel filtering pond, add chlorine contact pond, purified water discharge pipe, the sewage inlet tube passes through preliminary treatment filter equipment with FCR reaction tank unit connects, FCR reaction tank unit with the sedimentation tank is connected, the sedimentation tank respectively with sludge treatment equipment with fibre carousel filtering pond connects, fibre carousel filtering pond passes through add chlorine contact pond with purified water discharge pipe connects, the utility model discloses combine together with ecological treatment, sewage purification is effectual, and is with low costs, and occupation of land space is little, responds national "zero release" standard.
Description
Technical Field
The utility model relates to a sewage treatment system, in particular to an urban sewage treatment system.
Background
Urban environment influences economic development greatly, wherein the construction of urban sewage treatment facility is crucial, urban sewage treatment system directly concerns the development of surrounding environment and city, current urban sewage treatment system technique has become mature gradually, mainly be the sewage treatment plant of construction in every place, but traditional sewage treatment plant's construction cost is high, occupation space is big, the energy consumption is big, it is not pleasing to the eye, get rid of the effect unsatisfactory to indexes such as COD, BOD, SS in aquatic, restrict the development in city, along with the gradual improvement of national requirement for the environment, sewage discharge standard is strict day by day, the promotion of ecology, green environmental protection theory, zero release, ecological development has become sewage treatment's development trend.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a municipal sewage treatment system.
The utility model aims at realizing through the following technical scheme: the utility model provides an urban sewage treatment system, includes sewage inlet tube, preliminary treatment filter equipment, FCR reaction tank unit, sedimentation tank, sludge treatment equipment, fibre carousel filtering pond, adds chlorine and contacts pond, purified water discharge pipe, the sewage inlet tube passes through preliminary treatment filter equipment with FCR reaction tank unit connects, FCR reaction tank unit with the sedimentation tank is connected, the sedimentation tank respectively with sludge treatment equipment with fibre carousel filtering pond connects, fibre carousel filtering pond passes through add chlorine and contact the pond with purified water discharge pipe connects.
In a preferred embodiment, the pretreatment filtering device comprises a coarse grating, a sewage lifting pump, a fine grating and an aeration grit chamber, wherein the coarse grating is arranged at the water outlet end of the sewage inlet pipe, the coarse grating, the sewage lifting pump, the fine grating and the aeration grit chamber are sequentially communicated, and the aeration grit chamber is communicated with the FCR reaction tank unit.
In a preferred embodiment, the coarse grid is provided with a slag discharge port, and the fine grid and the aeration grit chamber are both provided with sand discharge ports.
In a preferred embodiment, the FCR reaction tank unit includes an FCR reaction tank and a coagulation tank, the FCR reaction tank is communicated with the aeration grit chamber, the FCR reaction tank is communicated with the sedimentation tank through the coagulation tank, a stirrer is arranged in the coagulation tank, and a coagulant dosing device and a flocculant dosing device are arranged at the top of the coagulation tank.
In a preferred embodiment, a sludge return pipe is arranged between the coagulation tank and the FCR reaction tank.
In a preferred embodiment, the settling tank is a horizontal flow settling tank.
In a preferred embodiment, the sludge treatment device comprises a sludge storage tank and a sludge dewatering tank, the sedimentation tank is connected with the sludge dewatering tank through the sludge storage tank, and the sludge storage tank and the sludge dewatering tank are both provided with sewage return pipes connected with the coarse grating.
In a preferred embodiment, a belt type sludge concentration and dehydration machine is arranged in the sludge dehydration pool, and a sludge dehydration and medicine adding PAM preparation device is arranged at the top of the sludge dehydration pool.
In a preferred embodiment, the chlorination contact tank comprises a contact tank and a chlorine dioxide generator, the fiber rotary disc filter tank is connected with the purified water discharge pipe through the contact tank, and the chlorine dioxide generator is connected with the contact tank.
The utility model has the advantages that:
the utility model adopts the coarse grid, the fine grid and the aeration grit chamber to carry out primary treatment on the urban sewage, the sewage is subjected to secondary treatment by the FCR reaction tank, a water ecological food chain is constructed by natural and artificial methods, the pollutants such as CODcr, BOD5, TN, NH3-N, TP and the like in the sewage are removed by utilizing microorganisms, protozoa and micro-animals attached to the root system of plants and the surface of a carrier, the occupation area of the FCR reaction tank is small, the cost is low, the treatment capacity is large, meanwhile, the device is beautiful and environment-friendly, the sewage is treated by the FCR reaction tank and then is subjected to three-stage filtration, disinfection and sterilization treatment by the fiber rotary disc filter tank and the chlorine contact tank to obtain purified water, carry out the dehydration to mud simultaneously, the mud after the processing can also recycle, the utility model discloses combine together with ecological treatment, sewage purification is effectual, green, and is with low costs, responds national "zero release" standard.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a flow chart of a municipal sewage treatment system according to an embodiment of the present invention.
In the figure:
1. a sewage inlet pipe; 2. a pretreatment filtration device; 201. coarse grating; 202. a sewage lift pump; 203. Fine grids; 204. an aeration grit chamber; 3. an FCR reaction tank unit; 301. an FCR reaction tank; 302. a coagulation tank; 303. a coagulant dosing device; 304. a flocculant dosing device; 305. a sludge return pipe; 4. a sedimentation tank; 5. a sludge treatment device; 501. a mud storage pool; 502. a sludge dewatering tank; 503. a preparation device for sludge dewatering and adding PAM; 504. a sewage return pipe; 6. a fiber rotary disc filter chamber; 7. a chlorine contact tank; 701. a contact tank; 702. a chlorine dioxide generator; 8. a purified water discharge pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The invention will be further described with reference to the drawings and specific examples.
As shown in figure 1, the embodiment of the utility model provides a pair of municipal sewage treatment system, including sewage inlet tube 1, preliminary treatment filter equipment 2, FCR reaction tank unit 3, sedimentation tank, sludge treatment device, fibre carousel filtering pond, add chlorine contact pond, purified water discharge pipe, sewage inlet tube 1 is connected with FCR reaction tank unit 3 through preliminary treatment filter equipment 2, and FCR reaction tank unit 3 is connected with the sedimentation tank, and the sedimentation tank is connected with sludge treatment device and fibre carousel filtering pond respectively, and fibre carousel filtering pond is through adding chlorine contact pond and purified water discharge pipe connection.
In a specific embodiment, the pretreatment filter device 2 comprises a coarse grating 201, a sewage lift pump 202, a fine grating 203 and an aeration grit chamber 204, the coarse grating 201 is arranged at the water outlet end of the sewage inlet pipe 1, the coarse grating 201, the sewage lift pump 202, the fine grating 203 and the aeration grit chamber 204 are sequentially communicated, the aeration grit chamber 204 is communicated with the FCR reaction tank unit, and the coarse grating 201, the sewage lift pump 202, the fine grating 203 and the aeration grit chamber 204 are all in the prior art;
urban sewage enters the coarse grating 201 through the sewage inlet pipe 1 to remove larger floaters in the sewage and intercepts sundries with the diameter larger than 20mm so as to ensure the normal operation of the sewage lifting pump 202, the sewage lifting pump 202 lifts the sewage filtered by the coarse grating 201 to the inlet of the fine grating 203, the sewage removes the finer floaters in the sewage through the fine grating 203 so as to ensure the normal operation of the subsequent treatment flow, the sewage in the fine grating 203 flows into the aeration grit chamber 204 to remove inorganic sand grains with larger grain diameter in the sewage so as to ensure the normal operation of the subsequent treatment flow, and the occurrence of sedimentation in the subsequent treatment is reduced.
In the concrete embodiment, thick grid 201 is equipped with row's cinder notch, thin grid 203 all is equipped with the sand discharge mouth with the aeration grit chamber, and the cinder notch of thick grid 201 is equipped with screw press (prior art), carries away the regular discharge of thick grid 201 exhaust waste residue, and the sand discharge mouth of thin grid 203 is equipped with shaftless screw conveyer (prior art), carries away the regular discharge of thin grid 203 exhaust gravel, is equipped with chain plate formula sand scraper (prior art) in the aeration grit chamber 204 for carry away the sediment sand that deposits in aeration grit chamber 204 bottom.
In a specific embodiment, the FCR reaction tank unit 3 includes an FCR reaction tank 301 and a coagulation tank 302, the FCR reaction tank 301 is communicated with the aeration grit chamber 204, the FCR reaction tank 301 is communicated with the sedimentation tank 4 through the coagulation tank 302, a stirrer (not shown in the figure) is arranged in the coagulation tank 302, and a coagulant dosing device 303 and a flocculant dosing device 304 are arranged at the top of the coagulation tank 302;
the FCR reaction tank 301 is the prior art, sewage flows into the FCR reaction tank 301 from the aeration grit chamber 204, and pollutants in the sewage are consumed by using microorganisms and bacteria (collectively referred to as biological groups) in the FCR reaction tank 301, compared with other schemes based on an activated sludge method, natural (plant) and artificial plant root structures are used as biofilm carriers, and the biological concentration of the sewage can be cultured and maintained in three to four times of that of the activated sludge method in each cubic meter of reaction tank volume; in the FCR reaction tank 301, most of organisms in the reaction tank are attached to roots to grow but not suspended, the equivalent biological concentration can reach 15-18 kg/m3, and is higher than the suspended solid concentration of mixed liquid of a common activated sludge method by 4-6 kg/m 3; compared to typical biological contact oxidation, the FCR reaction tank 301 has a greater biomass and surface area, which is about 12,000m2/m3, resulting in a shorter hydraulic retention time than typical biological contact oxidation; compared with the traditional activated sludge method, the FCR reaction tank 301 can reduce the tank volume by about 50 percent on the premise of achieving the same sewage purification capacity, and the land saving effect is obvious, so that the construction and equipment cost is saved;
a coagulant dosing device 303 and a flocculant dosing device 304 are arranged at the top of the coagulation tank 302, coagulant and flocculant are put into the coagulation tank 302, and it can be understood that both coagulant and flocculant can be put simultaneously or coagulant or flocculant can be put separately, after the coagulant or flocculant is put into the coagulation tank 302, particles which are difficult to precipitate in water can be mutually polymerized to form colloid after being uniformly mixed by a stirrer, and then the colloid is combined with impurities in the water body to form a larger flocculating constituent, the flocculating constituent has strong adsorption force, not only can adsorb suspended matters, but also can adsorb partial bacteria and soluble substances, and the flocculating constituent sinks by the increase of volume through adsorption; the coagulation tank, the coagulant and the flocculant are all in the prior art.
In a specific embodiment, a sludge return pipe 305 is arranged between the coagulation tank 302 and the FCR reaction tank 301, a part of sludge generated in the coagulation tank 302 returns to the FCR reaction tank 301 through the sludge return pipe 305, and a part of sludge enters the sedimentation tank 4.
In a specific embodiment, the sedimentation tank 4 is a horizontal sedimentation tank, a nonmetal chain plate type mud scraper is arranged in the sedimentation tank 4, the horizontal sedimentation tank and the chain plate type mud scraper are both in the prior art, sewage is secondarily precipitated in the sedimentation tank 4, the produced sludge enters a sludge treatment device through the nonmetal chain plate type mud scraper, and the sewage above the sludge enters the fiber rotary disc filter 6.
In a specific embodiment, the sludge treatment device 5 comprises a sludge storage tank 501 and a sludge dewatering tank 502, the sedimentation tank 4 is connected with the sludge dewatering tank 502 through the sludge storage tank 501, sludge generated by the sedimentation tank 4 enters the sludge storage tank 501 for storage and re-sedimentation, the sludge in the sludge storage tank 501 enters the sludge dewatering tank 502, a belt-type sludge concentration dehydrator (not shown in the figure) is arranged inside the sludge dewatering tank 502, a sludge dewatering dosing PAM preparation device 503 is arranged at the top of the sludge dewatering tank 502, the belt-type sludge concentration dehydrator and the sludge dewatering PAM preparation device 503 are both in the prior art, the sludge dewatering dosing PAM preparation device 503 doses the sludge into the sludge dewatering tank 502, the belt-type sludge concentration dehydrator dehydrates the sludge, and the dehydrated sludge is pollution-free and can be recycled; the sludge storage tank 501 and the sludge dewatering tank 502 are both provided with a sewage return pipe 504 connected with the coarse grating 201, and the clarified liquid in the sludge storage tank 501 and the sludge dewatering tank 502 flows back to the coarse grating 201 for retreatment.
In a specific embodiment, the chlorination contact tank 7 comprises a contact tank 701 and a chlorine dioxide generator 702, the fiber rotary disc filter 6 is connected with the purified water discharge pipe 8 through the contact tank 701, the chlorine dioxide generator 702 is connected with the contact tank 701, sewage in the sedimentation tank 4 enters the contact tank 701 through the fiber rotary disc filter 6, chlorine dioxide generated by the chlorine dioxide generator 702 is put into the contact tank 701 to sterilize and disinfect the sewage to obtain standard purified water, and the purified water can be discharged or recycled.
The first embodiment is as follows:
the water quality and treatment rate of inlet water and outlet water of a certain sewage treatment plant are as follows:
TABLE 1 quality of inlet and outlet water and treatment rate
| Item | Inflow water | Discharging water | Removal rate |
| Biochemical oxygen demand BOD5 | 180mg/l | ≤10mg/l | ≥95％ |
| Chemical oxygen demand CODcr | 370mg/l | ≤40mg/l | ≥90％ |
| Suspended matter SS | 150mg/l | ≤10mg/l | ≥95.5％ |
| Total nitrogen T-N | 55mg/l | ≤15mg/l | ≥66.7％ |
| Ammonia nitrogen NH3-N | 45mg/l | ≤5(8)mg/l | ≥83.3％ |
| Total phosphorus T-P | 4mg/l | ≤0.5mg/l | ≥90％ |
Note: average design water amount: q is 3.0 ten thousand meters3/d＝0.347m3(s), total coefficient of variation: k total is 1.45, maximum design flow: qmax is 0.503m3/s。
The treatment process comprises the following steps:
urban sewage enters a coarse grid through a sewage inlet pipe to remove larger floaters in the sewage and intercept sundries with the diameter larger than 20mm, a sewage lifting pump lifts the sewage filtered by the coarse grid to an inlet of a fine grid 203, the sewage removes smaller floating sundries in the sewage through the fine grid, the sewage in the fine grid flows into an aeration grit chamber to remove inorganic sand grains with larger grain diameters in the sewage so as to ensure the normal operation of a subsequent treatment process and reduce the occurrence of deposition in the subsequent treatment, a spiral squeezer is arranged at a slag discharge port of the coarse grid to periodically discharge and transport waste slag discharged by the coarse grid, and a shaftless spiral conveyer is arranged at a sand discharge port of the fine grid to periodically discharge and transport gravel discharged by the fine grid;
sewage flows into an FCR reaction tank from an aeration sand settling tank, pollutants in the sewage are consumed by utilizing a biological group in the FCR reaction tank, and most of pollutants, particularly pollutants such as biodegradable organic substances, nitrogen, phosphorus and the like in the sewage are removed, the FCR reaction tank adopts a food chain reactor FCR process of Hungary Onkia company, constructs a water ecological food chain through natural and artificial methods, and removes pollutants such as CODcr, BOD5, TN, NH3-N, TP in the sewage by utilizing microorganisms, protozoa and micro-animals attached to the surfaces of plant roots and carriers;
the sewage treated by the FCR reaction tank enters a coagulation tank, a part of the sludge treated by a coagulant or a flocculant put in the coagulation tank enters the FCR reaction tank through a return pipe, a part of the sludge enters a sedimentation tank along with the sewage, the sedimentation tank is a horizontal sedimentation tank, a nonmetal chain plate type mud scraper is arranged in the horizontal sedimentation tank, the sludge generated by sedimentation is discharged to a sludge storage tank, the sludge is subjected to dehydration treatment through a sludge concentration dehydrator in a sludge dehydration tank after being precipitated again in the sludge storage tank, the treatment is carried out while the chemical is added by a chemical adding device of a sludge dehydration PAM (polyacrylamide), the chemical adding is a dehydrating agent, and the sludge subjected to dehydration treatment can be discharged or recycled without pollution; clear liquid generated by sedimentation in the sludge storage tank and the sludge dewatering tank is treated again before returning to the coarse grid through the sewage return pipe respectively;
sewage from the sedimentation tank enters a fiber rotary disc filter tank, suspended and colloidal impurities in the sewage are removed, and BOD5, CODcr, SS and the like in the sewage are further reduced, so that the quality of the effluent is ensured; the sewage enters the contact tank through the fiber rotary disc filter tank, chlorine dioxide generated by the chlorine dioxide generator is put into the contact tank to disinfect and deodorize the sewage to obtain purified water reaching the standard, and the purified water can be discharged or recycled through the purified water discharge pipe.
The main equipment parameters are as follows:
coarse grating:
designing a civil engineering by a coarse grid and a lifting pump station according to the scale of 3.0 ten thousand m3/d, and allocating equipment according to the recent engineering 3.0 ten thousand m 3/d; a rotary mechanical grating with the grating width of 1.5m is arranged on the pump coarse grating channel, and 2 gratings are arranged in the current period; the gap between the grid bars is 20 mm; the mounting angle of the grating is 75 degrees, and N is 1.5 kw; the flow velocity of the gate passing is 0.6 m/s; the water depth before the grid is 0.6 m; clear rod type copper-inlaid cast iron square gates ZFM-1200 are arranged at the front and the back of the grating, the total number is 4, and N is 1.5 kw; the coarse grid slag is discharged by a screw press, WLY-260, the length of the coarse grid slag is 6m, and N is 2.2kw and is sent to a movable slag conveying trolley which is collected and transported by a garbage truck regularly.
Fine grids:
designing flow: qmax is 0.503m3/s；
Water depth before the grid: 1.2 m;
the flow velocity of the gate passing: v is 0.80 m/s;
the device type: a mechanical grid cleaner;
equipment parameters: the grid gap b is 3 mm; the width B of the grid channel is 1600 mm; the grid inclination angle a is 75O; the water level difference delta H of the passing grid is 150 mm; the number of the devices is 2, and the power of the matched motor is 1.5 kW;
shaftless screw conveyor: the diameter of the helix is 260mm and the length of the helix is 4500 mm.
An aeration grit chamber:
designing flow: qmax is 0.503m3/s。
An FCR reaction tank:
total residence time: 10.53 hr; residence time in anoxic zone: 3.78 hr; volume of anoxic zone: 4725m 3; the residence time of the aerobic zone: 6.75 hr; the aerobic area volume: 8437.5m 3; equivalent sludge concentration: 8.5g/l aerobic zone sludge load: 0.122kgBOD 5/kgMLSS; sludge yield: 0.51 kgDS/kgBOD; maximum gas-water ratio: 7.7: 1; water depth: 4.9 m.
A rotary disc filtering tank:
specification DN2500 mm; the filtration precision is less than or equal to 5 um.
Belt sludge concentration dewaterer:
the power is 15KW, and the single processing capacity Q is 25-40 m 3/h.
Sludge dewatering adds medicine PAM preparation facilities:
adding 5kg of medicine per ton of dry sludge; the preparation capacity is 2.5 kg/h; power: 2.5 KW; the preparation concentration is 0.1%.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (9)
1. The utility model provides an urban sewage treatment system which characterized in that: including sewage inlet tube, preliminary treatment filter equipment, FCR reaction tank unit, sedimentation tank, sludge treatment equipment, fibre carousel filtering pond, add chlorine and contact pond, purified water discharge pipe, the sewage inlet tube passes through preliminary treatment filter equipment with FCR reaction tank unit connects, FCR reaction tank unit with the sedimentation tank is connected, the sedimentation tank respectively with sludge treatment equipment with fibre carousel filtering pond connects, fibre carousel filtering pond passes through add chlorine and contact the pond with purified water discharge pipe connects.
2. The municipal sewage treatment system according to claim 1, wherein: the pretreatment filtering device comprises a coarse grating, a sewage lifting pump, a fine grating and an aeration grit chamber, wherein the coarse grating is arranged at the water outlet end of the sewage inlet pipe, the coarse grating, the sewage lifting pump, the fine grating and the aeration grit chamber are communicated in sequence, and the aeration grit chamber is communicated with the FCR reaction tank unit.
3. The municipal sewage treatment system according to claim 2, wherein: the coarse grating is provided with a deslagging port, and the fine grating and the aeration grit chamber are provided with a sand discharge port.
4. The municipal sewage treatment system according to claim 3, wherein: the FCR reaction tank unit comprises an FCR reaction tank and a coagulation tank, the FCR reaction tank is communicated with the aeration grit chamber, the FCR reaction tank is communicated with the sedimentation tank through the coagulation tank, a stirrer is arranged in the coagulation tank, and a coagulant dosing device and a flocculant dosing device are arranged at the top of the coagulation tank.
5. The municipal sewage treatment system according to claim 4, wherein: and a sludge return pipe is arranged between the coagulation tank and the FCR reaction tank.
6. The municipal sewage treatment system according to claim 5, wherein: the sedimentation tank is a horizontal flow sedimentation tank.
7. The municipal sewage treatment system according to claim 6, wherein: the sludge treatment device comprises a sludge storage tank and a sludge dewatering tank, wherein the sedimentation tank is connected with the sludge dewatering tank through the sludge storage tank, and the sludge storage tank and the sludge dewatering tank are both provided with sewage return pipes connected with the coarse grids.
8. The municipal sewage treatment system according to claim 7, wherein: the sludge dewatering tank is internally provided with a belt type sludge concentration dewatering machine, and the top of the sludge dewatering tank is provided with a sludge dewatering and medicine adding PAM preparation device.
9. The municipal sewage treatment system according to claim 1, wherein: the chlorination contact tank comprises a contact tank and a chlorine dioxide generator, the fiber rotary disc filter tank is connected with the purified water discharge pipe through the contact tank, and the chlorine dioxide generator is connected with the contact tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921223935.0U CN211419896U (en) | 2019-07-31 | 2019-07-31 | Urban sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921223935.0U CN211419896U (en) | 2019-07-31 | 2019-07-31 | Urban sewage treatment system |
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| CN211419896U true CN211419896U (en) | 2020-09-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047587A (en) * | 2020-10-16 | 2020-12-08 | 福建开远环境技术开发有限公司 | Environment-friendly sewage multi-stage recyclable treatment process |
| CN112777861A (en) * | 2020-12-31 | 2021-05-11 | 北京邦源环保科技股份有限公司 | Natural ecological treatment process for domestic sewage |
-
2019
- 2019-07-31 CN CN201921223935.0U patent/CN211419896U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047587A (en) * | 2020-10-16 | 2020-12-08 | 福建开远环境技术开发有限公司 | Environment-friendly sewage multi-stage recyclable treatment process |
| CN112777861A (en) * | 2020-12-31 | 2021-05-11 | 北京邦源环保科技股份有限公司 | Natural ecological treatment process for domestic sewage |
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