CN113880215A - Polluted water body deep phosphorus removal system - Google Patents
Polluted water body deep phosphorus removal system Download PDFInfo
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- CN113880215A CN113880215A CN202111149254.6A CN202111149254A CN113880215A CN 113880215 A CN113880215 A CN 113880215A CN 202111149254 A CN202111149254 A CN 202111149254A CN 113880215 A CN113880215 A CN 113880215A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 222
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 149
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 149
- 239000011574 phosphorus Substances 0.000 title claims abstract description 149
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 125
- 238000000926 separation method Methods 0.000 claims abstract description 94
- 239000012528 membrane Substances 0.000 claims abstract description 61
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 56
- 239000010935 stainless steel Substances 0.000 claims abstract description 56
- 239000002184 metal Substances 0.000 claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 claims abstract description 51
- 238000011001 backwashing Methods 0.000 claims abstract description 50
- 239000010865 sewage Substances 0.000 claims abstract description 23
- 150000003017 phosphorus Chemical class 0.000 claims abstract description 17
- 238000005201 scrubbing Methods 0.000 claims description 29
- 238000005273 aeration Methods 0.000 claims description 27
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000010842 industrial wastewater Substances 0.000 description 4
- 230000009920 chelation Effects 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- -1 biochemical method Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a deep phosphorus removal system for a polluted water body, which belongs to the technical field of sewage treatment and comprises a phosphorus locking agent mixing reaction unit and a phosphorus locking agent separation unit, wherein the phosphorus locking agent mixing reaction unit comprises a push flow gallery type mixing reaction tank body and a phosphorus locking agent mechanical feeding device, the phosphorus locking agent separation unit comprises a separation tank body, a stainless steel metal membrane group device, a water production pump and a pipe valve, a backwashing pump and a pipe valve, a saturated phosphorus locking agent discharge pump and a pipe valve and the like, a phosphorus locking agent is fully mixed and reacted with total phosphorus in sewage through the phosphorus locking agent mixing reaction unit, and the reacted water reaching the standard and the phosphorus locking agent are efficiently separated and discharged through the phosphorus locking agent separation unit. The system of the invention can break through the limit of the original polluted water body, fully create the condition of sewage centralized treatment, remove the total phosphorus in the polluted water body to be below 0.01mg/L, and simultaneously realize the treatment of the total phosphorus to meet different water production requirements superior to the IV-class water standards on the earth surface by reasonably controlling the concentration of the phosphorus-locking agent and the reaction time.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a deep phosphorus removal system for a polluted water body.
Background
With the increase of water environment protection and remediation strength of China, the construction of high-efficiency, energy-saving, low-carbon and environment-friendly economic development environments and the treatment of polluted water bodies, such as river and lake water environment comprehensive remediation, sewage treatment and recycling, industrial water pollution prevention and treatment and the like, higher requirements are put forward on the treatment effect and treatment rate of total phosphorus, namely, the total phosphorus index after treatment is required to reach the standard superior to the IV class on the earth surface, namely, the total phosphorus after treatment is strictly controlled to be below 0.3mg/L (the total phosphorus in lakes and reservoirs is required to be more strictly below 0.1 mg/L).
There are many methods for removing total phosphorus from polluted water, such as biochemical method, chemical method, adsorption method, etc., but the total phosphorus is reduced to below 0.1mg/L, the water safety is ensured, the generation amount of sludge and hazardous waste is synchronously controlled, the environmental pollution pressure is integrally reduced, and great challenges are provided in the technology. The comprehensive treatment of riverways, lake and reservoir eutrophication treatment, sewage treatment plant process technologies and the like at home and abroad are combed, although the prior case that the total phosphorus is reduced to 0.1mg/L by greatly prolonging the sewage treatment process is not excluded, the case that the total phosphorus is reduced to 0.1mg/L by adopting the intensified biochemical treatment and adding the serial processes of a biological filter, an air flotation tank, a sand filter, an activated carbon filter and the like and finally through the coordination of biochemistry and materialization is also included, the case that the total phosphorus is deeply removed through special resin adsorption is also included, but the comprehensive analysis on economy, safety and the like shows that the application of the technologies can achieve the standard total phosphorus, but because the process is too long and a large amount of byproducts, even toxic substances and the like are inevitably generated, the technologies can take effect in a short term, the technologies fundamentally treat the standard and do not have sustainability, the stability after the treatment also has a problem and the operation cost is too high, the risk of secondary phosphorus release exists in different degrees, so that the bottleneck exists in the deep phosphorus removal technology of the polluted water body so far, and the technology, economy, safety and environmental protection can not be integrated into a whole.
The phosphorus-locking agent can be chelated with phosphate ions in the polluted water body one by one to lock the phosphate ions with the phosphate ions, so that the total phosphorus in the sewage is efficiently reduced, the adding amount of the phosphorus-locking agent is in positive correlation with the total phosphorus removal amount, if the phosphorus-locking agent is fully mixed with the total phosphorus in the polluted water body, the total phosphorus can be reduced to be below 0.01mg/L theoretically, and meanwhile, because the phosphorus-locking agent does not contain toxic and harmful substances, any toxic and harmful side effects and products can not be generated on the polluted water body due to the additional substances, so compared with the traditional phosphorus removal agent, the phosphorus removal agent is the preparation which is most suitable for deep phosphorus removal of the polluted water body in terms of phosphorus removal effect, water body safety after phosphorus removal, phosphorus removal sludge amount control and the like.
Although the phosphorus-locking agent has a strong locking and removing effect on the total phosphorus in the polluted water body, most of the phosphorus-locking agents applied in China at present still adopt a mode of being mixed and then being put into the polluted water body in a mechanical or manual mode, taking comprehensive treatment of a river as an example, most of the phosphorus-locking agents are directly put into the water body in a mechanical mode, so that the amount of bottom mud of the river channel is inevitably increased, and even if the locked phosphorus can be prevented from being released again through simultaneous control of mud and water, if the total phosphorus can be effectively separated from the polluted water body system, if the sewage is put on shore, the treated water is discharged back into the water body after the total phosphorus is intensively extracted from the sewage, and the influence of the solid increment of the phosphorus-locking agent on the original water body can be fundamentally solved. In addition, the occurrence of deep phosphorus removal is influenced by the small particle size of the phosphorus-locking agent, and the like, and the deep phosphorus removal is required to be based on the sufficient mixing and efficient separation of the phosphorus-locking agent and the polluted water body, so that how to ensure that the phosphorus-locking agent fully plays a role in a relatively independent space, the collision chelation probability of the phosphorus-locking agent and total phosphorus is improved, and meanwhile, the loss rate of the phosphorus-locking agent is strictly controlled through an efficient separation technology, namely, the phosphorus-locking agent is timely updated and discharged out of a system after saturation, the continuous and accurate occurrence of one-to-one chelated phosphorus-locking effect is ensured, and the deep phosphorus removal effect of the whole system is sustainable, and a new challenge is undoubtedly faced in the technology.
The deep phosphorus removal effect of the phosphorus-locking agent is accurately exerted, the phosphorus-locking agent is applied to different fields, efficient mud-water separation is realized after the deep phosphorus removal effect is exerted by fully mixing the phosphorus-locking agent and a polluted water body, no relevant cases exist at home until now, the invention is based on the background, the problem of deep phosphorus removal of polluted water bodies such as river and lake water bodies, municipal sewage, industrial wastewater and the like is mainly solved, the adding amount of the phosphorus-locking agent is synchronously and accurately controlled, and the efficient reaction and the timely separation after saturation of the phosphorus-locking agent are achieved, so that the engineering floor area, the investment and the operation cost are greatly reduced, and the technology is advanced and sustainable.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a deep phosphorus removal system for polluted water bodies, which can be applied to various polluted water bodies, such as river and lake water bodies, municipal sewage, industrial wastewater and the like, and can reduce the total phosphorus index to be superior to the standard of IV water bodies on the earth surface, even to be less than 0.01mg/L, break through the lower limit of treatment by the traditional method, and simultaneously has the characteristics of small occupied area, low operation cost and long service life of the device.
In order to achieve the above purposes, the invention adopts a technical scheme that:
a deep phosphorus removal system for polluted water comprises a phosphorus-locking agent mixing reaction unit and a phosphorus-locking agent separation unit, wherein the phosphorus-locking agent mixing reaction unit is used for fully mixing and reacting a phosphorus-locking agent with total phosphorus in sewage, and then the phosphorus-locking agent separation unit is used for efficiently separating and discharging the water reaching the standard after reaction and the phosphorus-locking agent;
the phosphorus locking agent mixing reaction unit comprises a push flow gallery type mixing reaction tank body and a phosphorus locking agent mechanical feeding device, wherein:
a water inlet pipe for introducing raw water into the push flow gallery type mixing reaction tank body is arranged at the initial end outside the push flow gallery type mixing reaction tank body, and a submerged water outlet is arranged on the side wall of the push flow gallery type mixing reaction tank body;
the mechanical phosphorus-locking agent adding device is arranged outside the push-flow gallery type mixing reaction tank body, is communicated with the push-flow gallery type mixing reaction tank body beside the water inlet pipe, and is used for adding fresh phosphorus-locking agent into the push-flow gallery type mixing reaction tank body in time;
the phosphorus locking agent separation unit comprises a separation tank body, a stainless steel metal membrane group device, a water production pump and a pipe valve, an aeration scrubbing fan and a pipe valve, a backwashing pump and a pipe valve, a vacuum pumping pump and a pipe valve, a saturated phosphorus locking agent discharge pump and a pipe valve and a water production tank, wherein:
the separation tank body is positioned at the periphery of the push flow gallery type mixing reaction tank body, and the separation tank body and the push flow gallery type mixing reaction tank body are communicated through the submerged water outlet;
the stainless steel metal membrane group device is divided into a plurality of groups and is arranged in the separation tank body, and the stainless steel metal membrane group device realizes the effective separation of the phosphorus locking agent and the treated water reaching the standard;
the water production pump and the pipe valve are arranged outside the separation tank body, are communicated with a water production and backwashing main pipe of the stainless steel metal membrane group device and are used for timely discharging the separated water reaching the standard to the water production tank at the rear end and then discharging the water out of the system;
the aeration scrubbing fan and the pipe valve are arranged on the outer side of the separation tank body and are used for fully activating the state of the phosphorus-locking agent on the surface of the stainless steel metal membrane group device and ensuring that the stainless steel metal membrane group device continuously produces water;
the backwashing pump and the pipe valve are arranged outside the separation tank body, a water inlet pipe of the backwashing pump and the pipe valve are communicated with the water production tank, a water outlet pipe of the backwashing pump and the pipe valve are communicated with a water production and backwashing main pipe of the stainless steel metal membrane module device, and the stainless steel metal membrane module device is washed by the backwashing pump to prevent the stainless steel metal membrane module device from being blocked by a phosphorus locking agent;
the saturated phosphorus locking agent discharge pump and the pipe valve are arranged at the tail end in the separation tank body, are connected out of the separation tank body through a pipeline, and continuously discharge the saturated phosphorus locking agent out of the separation tank body in time through the saturated phosphorus locking agent discharge pump and the pipe valve;
the water producing tank is positioned outside the separation tank body and is communicated with the water producing pump through a pipeline, and the water producing tank is used for storing the water reaching the standard after deep dephosphorization and providing flushing water for the backwashing pump.
Further, according to the deep phosphorus removal system for the polluted water body, the separation tank body and the push flow gallery type mixed reaction tank body are of an integrated structure, and the push flow gallery type mixed reaction tank body is long in strip shape and is located in the center of the separation tank body.
Further, according to the deep phosphorus removal system for the polluted water body, the vacuum pumping pump and the pipe valve are arranged outside the separation tank body and are communicated with the water production and backwashing main pipe of the stainless steel metal membrane group device, so that the pipeline is timely vacuumized, and the stable water production of the system is ensured.
Further, according to the deep phosphorus removal system for polluted water, the stainless steel metal membrane module comprises a stainless steel metal membrane module, a water production and backwashing pipeline, a gas scrubbing system and a pipeline, wherein the water production and backwashing pipeline comprises a water production and backwashing connecting pipe, a water production and backwashing branch pipeline and a water production and backwashing dry pipe, the gas scrubbing system and the pipeline comprise a gas scrubbing branch pipe, a gas scrubbing circular pipe and a gas scrubbing dry pipe, and different automatic valves are respectively arranged on the connecting pipes for periodically opening and closing.
Further, according to the deep phosphorus removal system for the polluted water body, the number of the vacuumizing control valves on the pipeline behind the vacuumizing pump corresponds to the number of the stainless steel membrane group devices one by one.
Further, according to the deep phosphorus removal system for the polluted water, the particle size of the membrane hole of the stainless steel metal membrane component is effectively matched with the particle size of the phosphorus locking agent, so that the fine phosphorus locking agent is effectively blocked on one side of the membrane, and the phosphorus locking agent is effectively separated from the treated water reaching the standard.
Still further, in the deep phosphorus removal system for polluted water, the membrane pores of the stainless steel metal membrane component have a particle size range of 5-30 microns.
Further, as mentioned above, in the deep phosphorus removal system for polluted water, the submersible water impeller for providing hydrodynamic force is further arranged at the beginning end in the push flow gallery type mixed reaction tank, and the water in the gallery type mixed reaction tank is pushed to flow by the submersible water impeller close to the water inlet opening.
Further, as mentioned above, the phosphorus-locking agent separation unit further comprises a peripheral mixing aeration fan and a pipe valve in the separation tank body, the peripheral mixing aeration fan and its valve in the separation tank body are disposed outside the separation tank body, the peripheral mixing aeration pipeline in the separation tank body is disposed around the separation tank body, and the phosphorus-locking agent and the total phosphorus in the sewage are fully and uniformly mixed through the combined continuous action of the submersible water impeller and the peripheral mixing aeration fan in the separation tank body.
Further, according to the deep phosphorus removal system for the polluted water body, the submersible water impeller, the water production pump, the backwashing pump, the aeration scrubbing fan, the peripheral mixed aeration fan in the separation tank body, the saturated phosphorus locking agent discharge pump, the vacuum pumping pump and automatic valves on pipelines are controlled by the electric cabinet to start and stop and operate according to a set period.
The deep phosphorus removal system for the polluted water body provided by the invention has the beneficial effects that the limitation of the polluted water body is avoided, the one-to-one chelation accuracy rate of the phosphorus locking agent and total phosphorus is greatly improved by fully playing the role of the phosphorus locking agent and utilizing the precise separation effect of the stainless steel metal membrane group device on river and lake water bodies, municipal sewage, industrial wastewater treatment and the like, and the continuous and stable deep phosphorus removal effect is realized by timely updating and continuously discharging the phosphorus locking agent. In addition, the total phosphorus of inlet and outlet water of the polluted water body is accurately calculated, the reaction concentration and the reaction time of the phosphorus locking agent are reasonably controlled, the double accurate control of engineering investment and operation cost is realized, the floor area of the device system is strictly controlled, even the total phosphorus is treated to be below 0.01mg/L, the control standard which is superior to the IV-class water body on the earth surface and even superior to the III-class water body at present can be completely met, the traditional phosphorus removal lower limit can be broken through by the technology, and the iteration space value is higher.
Drawings
FIG. 1 is a schematic structural diagram of a deep phosphorus removal system for a polluted water body provided by the invention;
FIG. 2 is a three-dimensional isometric view of a deep phosphorus removal system for a contaminated water body according to the present invention;
FIG. 3 is a schematic structural diagram of the stainless steel metal membrane combiner in FIGS. 1 and 2;
in the figure: 1-water inlet pipe; 2-a push flow gallery type mixing reaction tank body; 3-diving impeller; 4-submerged water outlet; 5-a mechanical adding device for a phosphorus locking agent; 6-separating the tank body; 7-stainless steel metal membrane group device; 8-water producing pump and pipe valve; 9-aeration scrubbing fan and pipe valve; 10-backwash pump and tube valve; 11-a peripheral mixed aeration fan and a pipe valve in the separation tank body; 12-vacuum pump and tube valve; 13-saturated phosphorus locking agent discharge pump and pipe valve; 14-a water producing pool; 15-an electric cabinet; 16-stainless steel metal membrane modules; 17-water production and backwashing connecting pipes; 18-water production and backwashing branch pipes; 19-water production and backwashing of the main pipe; 20-scrubbing the branch pipe with gas; 21-gas scrubbing ring pipe; 22-air scrubbing of the main pipe.
Detailed Description
The invention is further described with reference to specific embodiments and drawings attached to the description.
A deep phosphorus removal system for polluted water bodies is shown in figures 1 and 2 and mainly comprises two different functional units, namely a phosphorus locking agent mixing reaction unit and a phosphorus locking agent separation unit, which are used for respectively and fully mixing and reacting a phosphorus locking agent with total phosphorus in sewage, and further efficiently separating and discharging the reacted water reaching the standard and the phosphorus locking agent.
The phosphorus locking agent mixing reaction unit mainly comprises a water inlet pipe 1, a push flow gallery type mixing reaction tank body 2, a submersible water impeller 3, a submerged water outlet 4 and a phosphorus locking agent mechanical feeding device 5, wherein:
the push flow gallery type mixed reaction tank body 2 is a reaction tank of the phosphorus locking agent, and the phosphorus locking agent and total phosphorus in the sewage are subjected to high-efficiency reaction in the reaction tank. In this embodiment, the flow-pushing gallery type mixing reaction tank 2 is in the shape of a long strip.
The water inlet pipe 1 is positioned at the initial end outside the push flow gallery type mixing reaction tank body 2, and raw water to be treated is connected into the push flow gallery type mixing reaction tank body 2 through the water inlet pipe 1.
The submersible water impeller 3 is arranged at the initial end in the push flow gallery type mixing reaction tank body 2 and close to the water inlet pipe 1 and is used for providing hydrodynamic force to push the water body in the push flow gallery type mixing reaction tank body to flow, and further the phosphorus locking agent is fully mixed with the total phosphorus in the water body.
The mechanical adding device 5 for the phosphorus-locking agent is arranged outside the push-flow gallery type mixing reaction tank body 2, is communicated with the push-flow gallery type mixing reaction tank body 2 beside the water inlet pipe 1, and is used for adding fresh phosphorus-locking agent into the push-flow gallery type mixing reaction tank in time through the mechanical adding device 5 for the phosphorus-locking agent.
The phosphorus locking agent separation unit mainly comprises a separation tank body 6, a stainless steel metal membrane group device 7, a water production pump and pipe valve 8, an aeration scrubbing fan and pipe valve 9, a backwashing pump and pipe valve 10, a peripheral mixed aeration fan and pipe valve 11 in the separation tank body, a vacuum pumping pump and pipe valve 12, a saturated phosphorus locking agent discharge pump and pipe valve 13 and a water production tank 14, wherein:
the separation tank body 6 and the push flow gallery type mixing reaction tank 2 are of an integral structure and are positioned at the periphery of the push flow gallery type mixing reaction tank body 2, and the separation tank body 6 is positioned at the center; the submerged water outlet 4 is positioned on the side wall of the push-flow gallery type mixing reaction tank body 2 and is a flow passage between the push-flow gallery type mixing reaction tank body 2 and the separation tank body 6, and the two are communicated through the submerged water outlet 4, so that fluid can uniformly enter the separation tank body 6 from the push-flow gallery type mixing reaction tank body 2.
The stainless steel membrane group devices 7 are divided into a plurality of groups and are all arranged in the separation tank body 6, in the embodiment, only eight groups of stainless steel membrane group devices are illustrated and are symmetrically distributed on two sides in the separation tank body 6, and the group number and the layout form can be adjusted according to actual requirements without limitation. The device is key equipment for realizing effective separation of the phosphorus locking agent and treated standard water, and simultaneously ensures accurate, efficient and continuous stability of the separation process.
As shown in fig. 3, the stainless steel metal membrane module 7 is mainly composed of a stainless steel metal membrane module 16, a water production and backwashing pipeline, a gas scrubbing system and pipelines, wherein the water production and backwashing pipeline comprises a water production and backwashing connecting pipe 17, a water production and backwashing branch pipeline 18 and a water production and backwashing main pipe 19, the gas scrubbing system and pipelines comprise a gas scrubbing branch pipe 20, a gas scrubbing circular pipe 21 and a gas scrubbing main pipe 22, and each connecting pipeline is respectively provided with different automatic valves for periodic opening and closing operation. The particle size (5-30 microns) of the metal membrane pores of the stainless steel metal membrane component 16 is effectively matched with the particle size of the phosphorus locking agent, so that the fine phosphorus locking agent can be effectively blocked on one side of the membrane, and the phosphorus locking agent and the treated water reaching the standard can be effectively separated.
The aeration scrubbing fan and the pipe valve 9 are arranged on the outer side of the separation tank body 6 and are used for fully activating the state of the phosphorus-locking agent on the surface of the stainless steel metal membrane component 16 and ensuring that the stainless steel metal membrane component 7 continuously produces water.
The water producing pump and pipe valve 8 is arranged outside the separation tank body 6 and is communicated with a water producing and backwashing main pipe 19 of the stainless steel metal membrane group device 7, and the water producing pump and pipe valve is used for discharging the separated water reaching the standard to the water producing tank 14 at the rear end in time and then discharging the water out of the system.
The backwashing pump and pipe valve 10 is arranged outside the separation tank body 6, a water inlet pipe of the backwashing pump and pipe valve is communicated with a water production tank 14, a water outlet pipe of the backwashing pump and pipe valve is communicated with water production and backwashing main pipes 19 of the stainless steel metal membrane module 7, and the stainless steel metal membrane module is washed by the backwashing pump, so that the risk that the surface of the stainless steel metal membrane module 16 is blocked by the phosphorus-containing agent can be effectively reduced.
The peripheral mixing aeration fan and the valve thereof in the separation tank body are arranged outside the separation tank body 6, the peripheral mixing aeration pipeline in the separation tank body is arranged on the periphery in the separation tank body 6, the pipeline is provided with a pressure gauge and a manual control valve, and the phosphorus locking agent and the total phosphorus in the sewage are fully and uniformly mixed and reacted through the combined continuous operation of the submersible water impeller 3 and the peripheral mixing aeration fan in the separation tank body.
The vacuum pump and the pipe valve 12 are arranged outside the separation tank body 6 and are communicated with the water production and backwashing main pipe 19 of the stainless steel metal membrane module 7, and are used for vacuumizing the pipeline in time to ensure that the stainless steel metal membrane module 7 produces water stably. The number of the vacuumizing control valves on the pipeline after the vacuumizing pump corresponds to that of the stainless steel membrane group devices 7 one by one, namely, in the embodiment, eight groups of stainless steel membrane group devices are indicated, and eight vacuumizing control valves are required to be arranged correspondingly.
The saturated phosphorus locking agent discharge pump and the pipe valve 13 are arranged at the tail end in the separation tank body 6, are connected out of the separation tank body 6 through a pipeline, and discharge the saturated phosphorus locking agent out of the separation tank body in time through the continuous operation of the saturated phosphorus locking agent discharge pump.
The water producing tank 14 is positioned outside the separation tank body 6 and is communicated with the water producing pump through a pipeline, and is used for storing the standard water after deep dephosphorization and providing flushing water for the backwashing pump.
Equipment such as a submersible water impeller, a water production pump, a backwashing pump, an aeration scrubbing fan, a peripheral mixed aeration fan in the separation tank body, a saturated phosphorus locking agent discharging pump, a vacuum pumping pump and the like, and starting and stopping of an automatic valve on a rear pipeline are controlled by the electric cabinet 15, and the whole system is ensured to operate orderly according to a set period.
And the pipelines behind the water production pump, the backwashing pump and the aeration scrubbing fan device are also provided with a pressure gauge and a flow meter, so that the pressure and the flow of each pipeline are monitored in real time.
Example one
Treating river water, wherein the total phosphorus of the treated water is required to reach the IV standard of the earth surface. The experimental water amount is 700m3(d) the water production pump runs intermittently, and the water production flux is 568L/m2H, backwash flux 1420L/m2H, total volume of the reaction tank and the separation tank body is 87m3Area of stainless steel metal film 57.12m2The inlet water TP is 2.21mg/L, the outlet water TP is 0.14mg/L, and the actual outlet water meets the I-I standard of the earth surface.
Example two
The first-grade A superscript effluent of the municipal sewage plant is treated, and the total phosphorus of the treated water is required to reach the ground surface IV standard. The experimental water amount is 4m3D, intermittent operation of water production pump, 463L/m of water production flux2H, backwash flux 1157L/m2H, total volume of the reaction tank and the separation tank body is 0.37m3Stainless steel metal film area 0.40m2The inlet water TP is 1.1mg/L, the outlet water TP is 0.16mg/L, and the actual outlet water meets the II-class I standard of the earth surface.
Therefore, the deep phosphorus removal system and the phosphorus locking agent for the polluted water body provided by the invention can stably achieve the purpose of deep phosphorus removal without the limitation of the polluted water body, and the high-efficiency separation of the phosphorus locking agent and the treated water is realized by precisely matching tiny metal film holes and phosphorus locking agent particles through a stainless steel metal film combiner, so that the reaction concentration, the reaction time and the like of the phosphorus locking agent can be controlled, and the deep phosphorus removal effect is controllable.
Before the method is implemented, the concentration of a phosphorus locking agent in the device, the volume of a mixed reaction tank, the number of stainless steel metal membrane assemblies in a separation tank body and the like are accurately calculated according to the total phosphorus index of an actual polluted water body on site and the control requirement of the total phosphorus index of the effluent, so that the specification, the number and the like of each component in the device can be finally determined, and the total phosphorus of the effluent is ensured to stably reach the standard.
In conclusion, the deep phosphorus removal system for the polluted water body disclosed by the invention has the advantages that the phosphorus-locking agent is continuously added into the plug-flow gallery type mixed reaction tank through the phosphorus-locking agent mechanical adding device, is uniformly distributed in the plug-flow gallery type mixed reaction tank and the separation tank body, efficiently reacts with total phosphorus in sewage, is separated from treated produced water through the stainless steel metal membrane group device, and is timely discharged out of the system through the supersaturation phosphorus-locking agent discharge pump and the pipe valve after saturation is reached. The system is not limited by polluted water, can greatly improve the one-to-one chelation accuracy of the phosphorus-locking agent and total phosphorus by fully playing the role of the phosphorus-locking agent and utilizing the precise separation function of the stainless steel metal membrane group device on river and lake water, municipal sewage, industrial wastewater treatment and the like, and realizes the continuous and stable deep phosphorus removal effect by timely updating and continuously discharging the phosphorus-locking agent. In addition, the total phosphorus of inlet and outlet water of the polluted water body is accurately calculated, the reaction concentration and the reaction time of the phosphorus locking agent are reasonably controlled, the double accurate control of engineering investment and operation cost is realized, the floor area of the device system is strictly controlled, even the total phosphorus is treated to be below 0.01mg/L, the control standard which is superior to the IV-class water body on the earth surface and even superior to the III-class water body at present can be completely met, the traditional phosphorus removal lower limit can be broken through by the technology, and the iteration space value is higher.
The system of the present invention is not limited to the examples described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solution of the present invention, including but not limited to, other functional materials such as phosphorous-locking agent, activated carbon, etc., the composition and type of the device, the operation system, etc., which also belong to the technical innovation scope of the present invention, and the protection scope of the present invention is defined by the claims and the equivalents thereof.
Claims (10)
1. The deep phosphorus removal system for the polluted water body is characterized by comprising a phosphorus locking agent mixing reaction unit and a phosphorus locking agent separation unit, wherein the phosphorus locking agent mixing reaction unit is used for fully mixing and reacting a phosphorus locking agent with total phosphorus in sewage, and then the phosphorus locking agent separation unit is used for efficiently separating and discharging the water reaching the standard after reaction and the phosphorus locking agent;
the phosphorus-locking agent mixing reaction unit comprises a push flow gallery type mixing reaction tank body (2) and a phosphorus-locking agent mechanical feeding device (5), wherein:
a water inlet pipe (1) for introducing raw water into the push flow gallery type mixed reaction tank body (2) is arranged at the initial end outside the push flow gallery type mixed reaction tank body, and a submerged water outlet (4) is arranged on the side wall of the push flow gallery type mixed reaction tank body (2);
the mechanical phosphorus locking agent adding device (5) is arranged outside the push flow gallery type mixing reaction tank body (2), is communicated with the push flow gallery type mixing reaction tank body (2) beside the water inlet pipe (1), and is used for adding fresh phosphorus locking agent into the push flow gallery type mixing reaction tank body (2) in time through the mechanical phosphorus locking agent adding device (5);
the phosphorus locking agent separation unit comprises a separation tank body (6), a stainless steel metal membrane group device (7), a water production pump and a pipe valve (8), an aeration scrubbing fan and a pipe valve (9), a backwashing pump and a pipe valve (10), a vacuum pumping pump and a pipe valve (12), a saturated phosphorus locking agent discharge pump and a pipe valve (13) and a water production tank (14), wherein:
the separation tank body (6) is positioned at the periphery of the push flow gallery type mixing reaction tank body (2), and the separation tank body and the push flow gallery type mixing reaction tank body are communicated through the submerged water outlet (4);
the stainless steel metal membrane group device (7) is divided into a plurality of groups and is arranged in the separation tank body (6), and the stainless steel metal membrane group device (7) realizes the effective separation of the phosphorus locking agent and the treated water reaching the standard;
the water production pump and the pipe valve (8) are arranged outside the separation tank body (6), are communicated with a water production and backwashing main pipe of the stainless steel metal membrane group device (7), and are used for timely discharging the separated water reaching the standard to the rear end water production tank (14) and then discharging the water out of the system;
the aeration scrubbing fan and the pipe valve (9) are arranged on the outer side of the separation tank body (6) and are used for fully activating the state of a phosphorus-locking agent on the surface of the stainless steel metal membrane group device (7) and ensuring that the stainless steel metal membrane group device (7) continuously produces water;
the backwashing pump and the pipe valve (10) are arranged outside the separation tank body (6), a water inlet pipe of the backwashing pump and the pipe valve is communicated with the water production tank (14), a water outlet pipe of the backwashing pump is communicated with the water production and backwashing main pipe of the stainless steel metal membrane group device (7), and the stainless steel metal membrane group device (7) is washed by the backwashing pump to prevent from being blocked by a phosphorus locking agent;
the saturated phosphorus locking agent discharge pump and the pipe valve (13) are arranged at the tail end in the separation tank body (6), are connected out of the separation tank body (6) through a pipeline, and continuously discharge the saturated phosphorus locking agent out of the separation tank body (6) in time through the saturated phosphorus locking agent discharge pump and the pipe valve (13);
the water producing tank (14) is positioned outside the separation tank body (6), is communicated with the water producing pump through a pipeline and is used for storing the standard water after deep dephosphorization and providing flushing water for the backwashing pump.
2. The deep phosphorus removal system for polluted water body as claimed in claim 1, wherein the separation tank body (6) and the push flow gallery type mixing reaction tank body (2) are of an integral structure, and the push flow gallery type mixing reaction tank body (2) is of a long strip shape and is located in the center of the separation tank body (6).
3. The deep phosphorus removal system for polluted water according to claim 2, wherein the stainless steel metal membrane module (7) comprises a stainless steel metal membrane module (16), a water production and backwashing pipeline, a gas scrubbing system and a pipeline, wherein the water production and backwashing pipeline comprises a water production and backwashing connecting pipe (17), a water production and backwashing branch pipeline (18) and a water production and backwashing dry pipe (19), the gas scrubbing system and the pipeline comprise a gas scrubbing branch pipe (20), a gas circular scrubbing pipe (21) and a gas scrubbing dry pipe (22), and different automatic valves are respectively arranged on the connecting pipes for periodically opening and closing.
4. The deep phosphorus removal system for polluted water according to claim 3, wherein the vacuum pump and the pipe valve (12) are arranged outside the separation tank body (6) and are communicated with the water production and backwashing main pipe of the stainless steel metal membrane group device (7) for timely vacuumizing the pipeline to ensure stable water production of the system.
5. The deep phosphorus removal system for polluted water according to claim 4, wherein the number of the vacuumizing control valves on the pipeline behind the vacuumizing pump is in one-to-one correspondence with the number of the stainless steel membrane modules (7).
6. The deep phosphorus removal system for polluted water according to any one of claims 3 to 5, wherein the membrane pore particle size of the stainless steel metal membrane component (16) is effectively matched with the particle size of the phosphorus-locking agent, so that the fine phosphorus-locking agent is effectively blocked on one side of the membrane, and the phosphorus-locking agent is effectively separated from the treated standard water.
7. The deep phosphorus removal system for polluted water body as claimed in claim 6, wherein the membrane pores of the stainless steel metal membrane module (16) have a particle size range of 5-30 microns.
8. The deep phosphorus removal system for polluted water body as claimed in claim 1, wherein a submersible water impeller (3) for providing hydrodynamic force is further provided at the beginning of the inside of the flow-pushing gallery type mixing reaction tank body (2), and the water flow in the gallery type mixing reaction tank body (2) is pushed by the submersible water impeller (3) near the water inlet pipe orifice (1).
9. The deep phosphorus removal system for polluted water of claim 8, wherein the phosphorus-locking agent separation unit further comprises a peripheral mixing aeration fan and a pipe valve (11) in the separation tank body, the peripheral mixing aeration fan and the valve thereof in the separation tank body are arranged outside the separation tank body (6), a peripheral mixing aeration pipeline in the separation tank body is arranged around the separation tank body (6), and the phosphorus-locking agent and the total phosphorus in the sewage are fully and uniformly mixed through the combined continuous action of the submersible water impeller (3) and the peripheral mixing aeration fan in the separation tank body.
10. The deep phosphorus removal system for polluted water according to claim 9, wherein the submersible water impeller (3), the water production pump, the backwashing pump, the aeration scrubbing fan, the peripheral mixing aeration fan in the separation tank body, the saturated phosphorus locking agent discharge pump, the vacuum pump and the automatic valves on the pipelines are controlled by the electric cabinet (15) to start and stop and operate according to a set period.
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