CN111995121A - System and method for quickly purifying combined overflow sewage - Google Patents

System and method for quickly purifying combined overflow sewage Download PDF

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Publication number
CN111995121A
CN111995121A CN202010905314.1A CN202010905314A CN111995121A CN 111995121 A CN111995121 A CN 111995121A CN 202010905314 A CN202010905314 A CN 202010905314A CN 111995121 A CN111995121 A CN 111995121A
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China
Prior art keywords
sewage
ssgo
sludge
valve
sand
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Pending
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CN202010905314.1A
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Chinese (zh)
Inventor
范海涛
罗涛
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Shine Beijing Water Co ltd
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Shine Beijing Water Co ltd
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Priority to CN202010905314.1A priority Critical patent/CN111995121A/en
Publication of CN111995121A publication Critical patent/CN111995121A/en
Pending legal-status Critical Current

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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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/18—PO4-P
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage

Abstract

The invention discloses a system and a method for quickly purifying combined overflow sewage, which comprises SSgo sludge-sand integrated quick separation equipment, a dosing system consisting of a medicament tank and a dosing pump, a high-efficiency sedimentation tank, sludge-sand integrated squeezing equipment and a lifting system, wherein the SSgo sludge-sand integrated quick separation equipment is connected with the lifting system through a pipeline or a water distribution channel, the high-efficiency sedimentation tank comprises a water inlet, a water outlet and a dosing port, the water inlet is connected with the water outlet of the SSgo sludge-sand integrated quick separation equipment through a pipeline, and the dosing port is connected with the dosing pump. The invention has the advantages of small occupied area, short retention time, low capital construction cost, short construction period, flexible operation mode and the like, can realize the rapid purification of the overflow sewage through the modular design, avoids the idle of equipment, investment and occupied area waste in the non-flood period, and is very suitable for the emergency treatment of combined overflow sewage and the pretreatment and reconstruction of sewage treatment plants with short land occupation.

Description

System and method for quickly purifying combined overflow sewage
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a system and a method for quickly purifying combined overflow sewage.
Background
The reasons for the formation of black and odorous water bodies include exogenous pollution (municipal sewage, industrial wastewater, non-point source pollution, combined system overflow pollution) and endogenous pollution (bottom mud, decay of aquatic plants). Wherein, the combined overflow sewage in flood season is one of the main exogenous pollution sources for forming black and odorous water body. Due to the fact that pipe network systems of many cities in China are in rain and sewage flow system or the phenomenon that rain and sewage pipelines are connected in a mixed mode exists, rainwater mixed with municipal sewage exceeds the design capacity of a sewage collecting system when raining, overflow sewage is discharged into a water body under the condition of no treatment, and black and odorous water is formed. Therefore, the method solves the problem of combined system overflow pollution and is the key for treating the black and odorous water body in the city at the present stage. In the existing combined overflow pollution treatment technology, the method mainly comprises the following steps:
(1) storage regulation and precipitation: the technology has the functions of storing overflow rain sewage and a sedimentation tank on the other hand, sewage is discharged into a receiving water body after sedimentation treatment, and the technology has the defects of large occupied area of the storage sedimentation tank, large civil engineering quantity and poor water outlet effect; (2) hydraulic cyclone: the method for removing suspended solids in overflow rain sewage by utilizing high-speed rotating water flow has the defects that the treatment effect is unstable and is influenced by the quality and quantity of the sewage, the hydraulic condition in the separator, the particle size of solid particles and the like; (3) deep purification: the device comprises advanced treatment units such as an MBR (membrane bioreactor), a high-efficiency sedimentation tank and a filter tank, the quality of effluent water of the technology is high, but the MBR and the filter tank are seriously blocked by slag, hair, fiber and the like in sewage, the MBR and the filter tank are required to be cleaned regularly, otherwise, the treatment capacity of the process unit is reduced sharply, and the treatment effect is greatly reduced.
The running mode of the existing combined overflow pollution treatment system is a single mode, and the system can only be used for temporary treatment of combined overflow sewage in flood season, so that equipment is seriously idle in the flood season, the utilization rate of facilities is low, and the waste of investment and occupied land is caused.
Disclosure of Invention
The invention aims to provide a system and a method for quickly purifying combined overflow sewage, which have the advantages of small occupied area, short retention time, low capital construction cost, short construction period, flexible operation mode and the like.
In order to achieve the purpose, the invention provides the following technical scheme:
a system for quickly purifying combined overflow sewage, which comprises SSgo sludge-sand integrated quick separation equipment, a dosing system consisting of a medicament tank and a dosing pump, a high-efficiency sedimentation tank, sludge-sand integrated squeezing equipment and a lifting system, the SSgo sludge-sand integrated rapid separation equipment is connected with a lifting system through a pipeline or a water distribution channel, high-efficient sedimentation tank includes the water inlet, delivery port and adds the medicine mouth, and the water inlet passes through the pipeline with SSgo sludge sediment sand integration quick separation equipment's delivery port and links to each other, adds the medicine mouth and links to each other with the dosing pump, and the dosing pump links to each other with the medicament jar, and the equipment is squeezed in the integration of sludge sediment sand is including advancing the slag notch, arrange the slag notch and squeeze the liquid discharge port, advances the drain of slag notch and high-efficient sedimentation tank's delivery port and SSgo sludge sediment sand integration quick separation equipment and passes through the pipeline and link to each other, and it passes through the pipeline with hoisting system to squeeze the liquid discharge.
Furthermore, a pipeline connected with the original sewage is provided with a valve A, SSgo on the pipeline connected with the overflow sewage by the SSgo sludge-sand integrated rapid separation equipment, a pipeline connected with the original sewage is provided with a valve B, a pipeline connected with the high-efficiency sedimentation tank by the SSgo sludge-sand integrated rapid separation equipment is provided with a valve C, a pipeline connected with the biochemical treatment unit of the sewage treatment plant by the SSgo sludge-sand integrated rapid separation equipment is provided with a valve D, and the valve A, the valve B, the valve C and the valve D are all connected with an automatic control system.
Furthermore, the SSgo sludge-sand integrated rapid separation equipment adopts a 50-500 mu m filter belt.
Further, the surface hydraulic load of the SSgo sludge-sand integrated rapid separation equipment is 5m3/m2·h～100m3/m2H, hydraulic retention time < 5 s.
Furthermore, the high-efficiency sedimentation tank adopts an inclined tube or inclined plate sedimentation mode, and the hydraulic retention time is 0.5-1 h.
Further, the medicament in the medicament tank comprises a coagulant and a flocculant, the coagulant is PAC, and the adding concentration range is 10-50 mg/L; PAM is adopted as the flocculating agent, and the adding concentration range is 1-5 mg/L.
Furthermore, the sludge-sand integrated pressing equipment adopts spiral pressing equipment or pneumatic pressing equipment, and the aperture of a bottom water filtering screen is 50-500 mu m.
The invention provides a system for quickly purifying combined overflow sewage, which comprises the following steps:
step 1: rainwater and sewage exceeding the original designed treatment capacity of a sewage treatment plant enter a lifting system through an overflow pipe, and an alarm signal is triggered after the liquid level reaches an alarm value;
step 2: instructing an automatic control system to control the opening of a valve A, enabling overflow sewage to enter SSgo sludge-sand integrated rapid separation equipment for efficient pretreatment, and simultaneously, controlling the opening of a valve C by the automatic control system to enable the sewage pretreated by the SSgo sludge-sand integrated rapid separation equipment to enter a subsequent serial sewage treatment plant biochemical treatment unit for further treatment of COD, SS and phosphate, and enabling the rain sewage which does not exceed the designed treatment capacity of a sewage treatment plant to still enter an original process unit for treatment;
and step 3: under the condition of non-flood season, the automatic control system controls the valve A to be closed and the valve B to be opened, the raw sewage directly enters the SSgo sludge-sand integrated rapid separation device for strengthening pretreatment, and meanwhile, the automatic control system controls the valve C to be closed and the valve D to be opened, so that the sewage subjected to strengthening pretreatment by the SSgo sludge-sand integrated rapid separation device enters the original biochemical treatment unit for subsequent treatment.
Compared with the prior art, the invention has the beneficial effects that:
1. the hydraulic retention time of the whole system is extremely short, the hydraulic retention time of the pretreatment SSGO equipment is less than 5s, and the high-efficiency precipitation hydraulic retention time is 0.5-1h, so that the occupied area can be greatly saved, and the system is very suitable for water plant reconstruction with tense land; the SSGO, the lifting system and the dosing system are all incorporated into an integrated automatic control system, so that the operation and management are convenient; garbage, slag sand, hair intercepted by the SSGO and sludge precipitated by the efficient sedimentation tank are converged into sludge-slag-sand integrated pressing equipment, so that the process flow is shortened, and the operation cost is reduced.
2. The whole system adopts a flexible operation mode, under the condition of flood season, rain sewage exceeding the original design capacity of a sewage treatment plant is subjected to high-efficiency pretreatment by utilizing SSGO sludge-sand integrated rapid separation equipment, and then passes through an advanced treatment unit, and rain sewage not exceeding the design capacity still enters the original pretreatment unit of the sewage treatment plant and enters an original biochemical treatment unit for treatment; under the condition of non-flood season, the raw sewage can directly enter SSGO sludge-sand integrated rapid separation equipment for enhanced pretreatment, and then enters a biochemical treatment unit. Compared with the original pretreatment facilities of the sewage treatment plant, the system has the advantages that the removal rate of the sludge sand and the hair is more than 95%, the operation stability of the sewage treatment plant is greatly improved, the idle of equipment facilities is avoided, the sewage treatment effect can be exerted in flood season and non-flood season, and the maximization of economic and environmental benefits is realized.
Drawings
FIG. 1 is a view showing a system configuration for rapidly purifying combined overflow sewage according to the present invention;
FIG. 2 is a schematic diagram of the operation mode of the system for rapidly purifying combined overflow sewage according to the present invention.
In the figure: 1. a lifting system; 2. SSgo sludge-sand integrated rapid separation equipment; 3. a medicament canister; 4. A dosing pump; 6. a high-efficiency sedimentation tank; 7. mud residue and sand integrated squeezing equipment; 8. a valve A; 9. a valve B; 10. an automatic control system; 11. a valve C; 12. a biochemical treatment unit of a sewage treatment plant; 13. and a valve D.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a system for rapidly purifying combined overflow sewage, which comprises an SSgo sludge-sand integrated rapid separation device 2, a dosing system consisting of a chemical tank 3 and a dosing pump 4, a high-efficiency sedimentation tank 6, a sludge-sand integrated squeezing device 7 and a lifting system 1, wherein the SSgo sludge-sand integrated rapid separation device 2 is connected with the lifting system 1 through a pipeline or a water distribution channel, the lifting system 1 lifts overflow sewage or raw sewage into the SSgo sludge-sand integrated rapid separation device 2 for treatment, the high-efficiency sedimentation tank 6 comprises a water inlet, a water outlet and a chemical adding port, the water inlet is connected with the water outlet of the SSgo sludge-sand integrated rapid separation device 2 through a pipeline, the sewage after the high-efficiency pretreatment of the SSgo sludge-sand integrated rapid separation device 2 enters the high-efficiency sedimentation tank 6, the chemical adding port is connected with the dosing pump 4, and the chemical adding pump 4 pumps chemicals into the high-efficiency sedimentation tank 6 for coagulation, Carrying out precipitation reaction so as to further purify the sewage; the purified water is discharged into a water body through a water outlet, a dosing pump 4 is connected with a medicament tank 3, and most of COD, SS and phosphate in the water body can be removed by dosing medicament in an advanced treatment unit, so that the pollution of combined overflow sewage to a water environment is reduced, the medicament in the medicament tank 3 comprises a coagulant and a flocculant, the coagulant is PAC, and the dosing concentration range is 10-50 mg/L; the flocculating agent adopts PAM, the adding concentration range is 1-5mg/L, the sludge-residue-sand integrated squeezing equipment 7 comprises a residue inlet, a residue discharge port and a squeezing liquid discharge port, the residue inlet is connected with a water outlet of the high-efficiency sedimentation tank 6 and a sewage discharge port of the SSgo sludge-residue-sand integrated rapid separation equipment 2 through pipelines, sludge and hair intercepted by the SSgo sludge-residue-sand integrated rapid separation equipment 2 are collected through a pipeline or a groove body with sludge precipitated by the high-efficiency sedimentation tank 6 and converged into the sludge-residue-sand integrated squeezing equipment 7, dewatering and squeezing are carried out, and the squeezing liquid discharge port is connected with the lifting system 1 through a pipeline.
Referring to fig. 2, a valve A8 is arranged on a pipeline connecting the SSgo sludge-sand integrated rapid separation device 2 and the overflow sewage, the combined overflow sewage is lifted by a pipeline and enters the SSgo sludge-sand integrated rapid separation device 2 for treatment, most of suspended pollutants such as garbage, mud, slag, sand, hair and the like are removed, the blockage, winding and abrasion of the pollutants on the advanced treatment unit device are greatly reduced, and meanwhile, the subsequent medicament consumption is reduced, a valve B9 is arranged on a pipeline connecting the SSgo sludge-sand integrated rapid separation equipment 2 with the original sewage, a valve C11 is arranged on a pipeline connecting the SSgo sludge-sand integrated rapid separation equipment 2 with the efficient sedimentation tank 6, a valve D13 is arranged on a pipeline connecting the SSgo sludge-sand integrated rapid separation equipment 2 with the biochemical treatment unit 12 of the sewage treatment plant, and the valve A8, the valve B9, the valve C11 and the valve D13 are all connected with the automatic control system 10. The automatic control system 10 can control the opening and closing of the pipeline valves and the water inlet pump set of the advanced treatment unit at different periods.
The automatic control system 10 can independently control the running speed of the SSgo sludge-sand integrated rapid separation equipment 2 and send liquid level alarm and maintenance prompt; and the system can also control the linkage operation of the squeezing equipment and the dosing system, and control the opening and closing of the pipeline valve and the water inlet pump set of the depth treatment unit in different modes.
And the SSgo sludge-sand integrated rapid separation equipment 2 selects a filter belt of 50-500 mu m. The surface hydraulic load of the SSgo sludge-sand integrated rapid separation equipment 2 is 5m3/m2·h～100m3/m2H, the hydraulic retention time is less than 5s, the floor area of a single device is small, and a plurality of devices can be connected in parallel to meet the requirements of different treatment scales.
The high-efficiency sedimentation tank 6 adopts an inclined tube or inclined plate sedimentation mode, and the hydraulic retention time is 0.5-1 h. The high-efficiency sedimentation tank 6 comprises a coagulation zone and a flocculation reaction zone, coagulants such as PAC, PAM and the like are added into sewage through a dosing system, flocculation reaction sedimentation is carried out on suspended pollutants SS, granular organic pollutants, colloidal organic pollutants and orthophosphate in water, and the aim of quickly and efficiently removing COD, SS and orthophosphate is achieved.
The sludge-residue-sand integrated squeezing device 7 adopts a screw squeezing device or a pneumatic squeezing device, the aperture of a bottom water filtering net is 50-500 mu m, sludge generated by the SSgo sludge-residue-sand integrated rapid separation device 2 and the advanced treatment device can be integrally dehydrated, sludge sand and hair with fine particle size discharged by the SSgo sludge-residue-sand integrated rapid separation device 2 and the efficient sedimentation tank 6 can be effectively intercepted, and the water content after squeezing and dehydration can reach below 75%.
A system for rapidly purifying combined overflow sewage comprises the following steps: step 1: under the condition of flood season, rainwater and sewage exceeding the originally designed treatment capacity of a sewage treatment plant enter the lifting system 1 through the overflow pipe, and an alarm signal is triggered after the liquid level reaches a warning value; step 2: and (3) instructing the automatic control system 10 to control the valve A8 to be opened, enabling overflow sewage to enter the SSgo sludge-sand integrated rapid separation equipment 2 for efficient pretreatment, and simultaneously, controlling the valve C11 to be opened by the automatic control system 10 to enable the sewage pretreated by the SSgo sludge-sand integrated rapid separation equipment 2 to enter the biochemical treatment unit 12 of the sewage treatment plant connected in series subsequently, further treating COD, SS and phosphate, and enabling rain sewage which does not exceed the designed treatment capacity of the sewage treatment plant to still enter the original process unit for treatment. And step 3: under the condition of non-flood season, the automatic control system 10 controls the valve A8 to be closed, the control valve B9 to be opened, the original sewage directly enters the SSgo sludge-sand integrated rapid separation equipment 2 for strengthening pretreatment, meanwhile, the automatic control system 10 controls the valve C11 to be closed, and the control valve D13 is opened, so that the sewage strengthened and pretreated by the SSgo sludge-sand integrated rapid separation equipment 2 enters the original biochemical treatment unit for subsequent treatment.
The flood season refers to a period that the quantity of rain and sewage regularly and remarkably rises in one year due to seasonal rainfall, so that the treatment capacity of the flood season exceeds the original designed treatment capacity of a sewage treatment plant; the time periods of flood seasons of different areas are different, the flood entry time of the south is earlier, and the end time is later; the flood time in the north is later, and the ending time is earlier; for example, the flood season of the Zhujiang river area is 4-9 months, the flood season of the Yangtze river area is 5-10 months, the flood season of the Huaihe river area is 6-9 months, the flood season of the Huanghe river area is 6-10 months, and the flood season of the Songhua river area is 6-9 months.
Under the condition of flood season, rain sewage exceeding the original design capacity of a sewage treatment plant is efficiently treated by connecting SSGO sludge-sand integrated rapid separation equipment in series with an advanced treatment unit; the rain sewage which does not exceed the design capability still enters the original pretreatment unit of the sewage treatment plant and then enters the original biochemical treatment unit for treatment.
Under the non-flood season condition, former sewage can directly get into SSGO sediment sand integration quick separation equipment and carry out the intensive pretreatment, and then get into original biochemical treatment unit and handle to avoid non-flood season processing system's idle, promote sewage treatment plant operating stability simultaneously.
According to the system for rapidly purifying the combined system overflow pollution, through SSGO reinforced pretreatment equipment, the removal rate of sludge, sand and hair in overflow rainwater can reach more than 95%; through the serial deep treatment units, SS in the inlet water can be removed by more than 60 percent, and COD can be removed by more than 30 percent. The operation mode can play the dual functions of the rapid sewage purification system in combined overflow pollution treatment and sewage treatment plant strengthened pretreatment, thereby avoiding the idle of equipment and facilities in the non-flood period, strengthening the pretreatment effect of the sewage treatment plant, improving the operation stability of the process and realizing the maximization of economic and environmental benefits.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.

Claims (8)

1. The utility model provides a system for purify confluence system overflow sewage fast, a serial communication port, including SSgo mud sediment sand integration quick separation equipment (2), by medicine system, high-efficient sedimentation tank (6), mud sediment sand integration that medicine pump (4) are constituteed with medicine jar (3) squeeze equipment (7) and hoist system (1), SSgo mud sediment sand integration quick separation equipment (2) link to each other through pipeline or distribution channel with hoist system (1), high-efficient sedimentation tank (6) include water inlet, delivery port and add the medicine mouth, and the water inlet passes through the pipeline with the delivery port of SSgo mud sediment sand integration quick separation equipment (2) and links to each other, and it links to each other with medicine pump (4) to add the medicine mouth, and medicine pump (4) link to each other with medicine jar (3), and mud sediment sand integration squeezes equipment (7) including advancing the cinder notch, arrange the cinder notch and squeeze the liquid discharge port, advances the cinder notch and the delivery port of high-efficient sedimentation tank (6) and the drain of SSgo mud sediment sand integration quick separation equipment (2) Is connected through a pipeline, and a squeezing liquid discharge port is connected with the lifting system (1) through a pipeline.
2. The system for rapidly purifying combined overflow sewage according to claim 1, wherein a valve A (8) is installed on a pipeline connecting the SSgo sludge-sand integrated rapid separation device (2) and the overflow sewage, a valve B (9) is installed on a pipeline connecting the SSgo sludge-sand integrated rapid separation device (2) and the raw sewage, a valve C (11) is installed on a pipeline connecting the SSgo sludge-sand integrated rapid separation device (2) and the high-efficiency sedimentation tank (6), a valve D (13) is installed on a pipeline connecting the SSgo sludge-sand integrated rapid separation device (2) and the biochemical treatment unit (12) of the sewage treatment plant, and the valve A (8), the valve B (9), the valve C (11) and the valve D (13) are all connected with the automatic control system (10).
3. The system for rapidly purifying combined overflow sewage of claim 1, wherein the SSgo sludge-sand integrated rapid separation equipment (2) adopts a 50-500 μm filter belt.
4. The system for rapidly purifying combined overflow sewage of claim 1, wherein the surface hydraulic load of the SSgo sludge-sand integrated rapid separation equipment (2) is 5m3/m2·h～100m3/m2H, hydraulic retention time < 5 s.
5. The system for rapidly purifying combined overflow sewage of claim 1, wherein the high-efficiency sedimentation tank (6) adopts an inclined tube or inclined plate sedimentation mode, and the hydraulic retention time is 0.5-1 h.
6. The system for rapidly purifying combined overflow sewage as claimed in claim 1, wherein the medicament in the medicament tank (3) comprises a coagulant and a flocculant, the coagulant is PAC, and the adding concentration is in the range of 10-50 mg/L; PAM is adopted as the flocculating agent, and the adding concentration range is 1-5 mg/L.
7. The system for rapidly purifying combined overflow sewage as claimed in claim 1, wherein the sludge-sand integrated pressing device (7) adopts a screw pressing device or a pneumatic pressing device, and the aperture of the bottom water filtering screen is 50-500 μm.
8. A system for rapid purification of combined overflow sewage as claimed in claim 1, comprising the steps of:
step 1: rainwater and sewage exceeding the original designed treatment capacity of a sewage treatment plant enter a lifting system (1) through an overflow pipe, and an alarm signal is triggered after the liquid level reaches an alarm value;
step 2: instructing an automatic control system (10) to control a valve A (8) to be opened, enabling overflow sewage to enter SSgo sludge-sand integrated rapid separation equipment (2) for efficient pretreatment, and simultaneously, controlling a valve C (11) to be opened by the automatic control system (10), so that the sewage pretreated by the SSgo sludge-sand integrated rapid separation equipment (2) enters a subsequent serial biochemical treatment unit (12) of a sewage treatment plant, COD, SS and phosphate are further treated, and the rain sewage which does not exceed the designed treatment capacity of the sewage treatment plant still enters an original process unit for treatment;
and step 3: under the condition of non-flood season, the automatic control system (10) controls the valve A (8) to be closed, the control valve B (9) to be opened, the original sewage directly enters the SSgo sludge-sand integrated rapid separation equipment (2) for strengthening pretreatment, meanwhile, the automatic control system (10) controls the valve C (11) to be closed and the control valve D (13) to be opened, so that the sewage subjected to strengthening pretreatment by the SSgo sludge-sand integrated rapid separation equipment (2) enters the original biochemical treatment unit for subsequent treatment.
CN202010905314.1A 2020-09-01 2020-09-01 System and method for quickly purifying combined overflow sewage Pending CN111995121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010905314.1A CN111995121A (en) 2020-09-01 2020-09-01 System and method for quickly purifying combined overflow sewage

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Application Number Priority Date Filing Date Title
CN202010905314.1A CN111995121A (en) 2020-09-01 2020-09-01 System and method for quickly purifying combined overflow sewage

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CN111995121A true CN111995121A (en) 2020-11-27

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Application Number Title Priority Date Filing Date
CN202010905314.1A Pending CN111995121A (en) 2020-09-01 2020-09-01 System and method for quickly purifying combined overflow sewage

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115093060A (en) * 2022-07-07 2022-09-23 尚川(北京)装备有限公司 Process and system for quickly purifying rain sewage and overflow sewage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115093060A (en) * 2022-07-07 2022-09-23 尚川(北京)装备有限公司 Process and system for quickly purifying rain sewage and overflow sewage
CN115093060B (en) * 2022-07-07 2023-02-10 尚川(北京)装备有限公司 Process and system for quickly purifying rain sewage and overflow sewage

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