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CN102633383B - Deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system and method - Google Patents

Deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system and method Download PDF

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Publication number
CN102633383B
CN102633383B CN 201210109541 CN201210109541A CN102633383B CN 102633383 B CN102633383 B CN 102633383B CN 201210109541 CN201210109541 CN 201210109541 CN 201210109541 A CN201210109541 A CN 201210109541A CN 102633383 B CN102633383 B CN 102633383B
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China
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algae
well
water
water treatment
circulating
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CN 201210109541
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CN102633383A (en
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丛海兵
黄廷林
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Yangzhou University
Xian University of Architecture and Technology
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Yangzhou University
Xian University of Architecture and Technology
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Abstract

The invention provides a deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system and a treatment method, belonging to the technical field of feed water treatment. The deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system comprises a water supply pump, a water treatment tank and a drug feeding device, wherein the water supply pump and the drug feeding device are respectively connected with the water treatment tank through a pipeline; the deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system is characterized by being provided with a deep water circulating well for stressing air bags in the algae crack; the circulating well is provided with an inlet and an outlet; the inlet of the circulating well is connected with the water supply pump; and the outlet of the circulating well is connected with the water treatment tank. The water supply pump injects algae-containing water into the circulating well and enters the water treatment tank; the air bags in algae cells crack under high-pressure effect of the deep water of the circulating well so that the algae lose buoyancy to be easy to precipitate. A coagulant, the algae and other impurity grains collide in a reaction tank to be combined into larger floc grains so as to precipitate and be removed in a sedimentation basin. With the adoption of the method, the air bags of the algae are enabled to crack, the sedimentation speed is high and the removing effect is good; the algae cells are not damaged and water supply is safe; and the drug consumption and the energy consumption are low and the operation cost is low.

Description

Deep water cyclic hardening coagulating sedimentation is except algae water treatment system and method
Technical field
The present invention relates to a kind of water treatment system to algae-containing water and method, relate in particular to a kind of deep water cyclic hardening coagulating sedimentation except algae water treatment system and method, that algae-containing water is carried out coagulating sedimentation again after the circulation of ballow, remove water treatment device and the method for algae in water, belong to water-treatment technology field, be applicable to the waterworks and remove algae and other turbidity material that bloom blue algae etc. has the floating characteristic.
Background technology
Bloom blue algae is the difficult problem in drinking water treatment, has air bag in the bloom blue algae cell, for algae provides buoyancy, algae can not be sunk, and is difficult for being removed by conventional coagulating sedimentation technology.The algae air bag can be resisted the ambient pressure of 0.4~0.7MPa, if ambient pressure exceeds this pressure, air bag just irreversibly breaks.At present, the device of waterworks when processing blue-green algae comprises working shaft, water treating pond (generally being comprised of mixing pit, reaction tank, settling tank) and chemicals dosing plant etc., working shaft supplies water to mixing pit by water pipe, chemicals dosing plant adds algicide and coagulating agent to mixing pit, and algae-containing water mixes in mixing pit, reaction tank, settling tank, reaction and precipitation process.At first add algicide that algae is killed, then add a large amount of coagulating agent that other impurity particles in algae particle and water are adhered to each other, increase the algae particle weight, redeposition is removed.The algicide that adds in source water has the strong oxidizers such as chlorine, potassium permanganate, ozone, and coagulating agent has Tai-Ace S 150, iron(ic) chloride, polymerize aluminum chloride etc.There are many problems in this water treatment method, algicide should be with more than algae fully contacts 20min, after algae is killed, frustule breaks, the dissolved matters such as algae toxin and enchylema leak in water, the algae toxin has very strong toxicity, and algae liquid also can generate carcinogenic substance with follow-up Water Disinfection agent reaction.Algicide has strong corrosive nature to water supply line.Killing after algae coagulating sedimentation still needs to add a large amount of coagulating agent and just can make the algae precipitation, and more than dosage 40mg/L, cost is high.
Summary of the invention
The purpose of this invention is to provide a kind of deep water cyclic hardening coagulating sedimentation except algae water treatment system and method, solve water treatment system and the existing above-mentioned shortcoming and defect of method that adopt algae removal existing waterworks, pre-treatment circulates algae-containing water by the present invention through the ballow, the algae air bag is broken under the deep water High Pressure, loss of buoyance, thereby sedimentation speed is fast, removes algae effective; And in pre-treatment, frustule does not break, and can not cause that algae liquid leaks, safety and environmental protection.
The objective of the invention is to be achieved through the following technical solutions, deep water cyclic hardening coagulating sedimentation is except the algae water treatment system, comprise working shaft, water treating pond and chemicals dosing plant, working shaft, chemicals dosing plant connect water treating pond by pipeline respectively, it is characterized in that, be provided with the deep water circulation well of balloon rupture in the compressing frustule, circulation well is provided with import and outlet, the import of circulation well connects described working shaft, and the outlet of circulation well connects described water treating pond.
Described circulation well is cylindrical closed vessel, by Wai Jing and interior well construction, interior well diameter is less than outer well diameter, and interior well location is inner in outer well, and the Nei Jing top is fixed on the Wai Jing top, the Nei Jing top is provided with outlet and connects water treating pond, the degree of depth of interior well is less than the degree of depth of outer well, interior shaft bottom end opening, and circulation well is vertically installed, outer well depth is 60m at least, and the wall of outer well is provided with import and is connected with working shaft.
Described water treating pond comprises mixing pit, reaction tank, settling tank, and mixing pit, reaction tank, settling tank are arranged along water (flow) direction, and the import of mixing pit connects the outlet of circulation well by water pipe, and mixing pit, reaction tank, settling tank are the rectangular pool of opening; Separate with the perforate wall between mixing pit and reaction tank, reaction tank and settling tank, be divided at least 3 lattice along water (flow) direction with the perforate wall in reaction tank; Agitator is installed in mixing pit, in every lattice of reaction tank, stirring rake is installed; On settling tank end wall, water surface site is equipped with effluent trough, on settling tank end wall, rising pipe is installed, the import of rising pipe is stretched in effluent trough in settling tank, the outlet of rising pipe is stretched out outside settling tank, the shore pipe that install the settling tank bottom stretches out logical waterways outside the pond, and shore pipe exports the position mud valve is installed; Described shore pipe is perforated pipe, longitudinally offers the circular hole of 2 row's diameter 20mm.
Described chemicals dosing plant is comprised of liquor box, solution conduit and valve, and solution conduit connects described mixing pit.
Utilize above-mentioned deep water cyclic hardening coagulating sedimentation to remove the method for algae except the algae water treatment system, comprise the algae-containing water that provided by working shaft in water treating pond by chemicals dosing plant add that coagulating agent mixes, reaction and precipitation process, it is characterized in that, the described algae-containing water dark ballow of 60m at least of flowing through before entering water treating pond makes the air bag in the frustule in algae-containing water break loss of buoyance and be easy under the deep water high pressure.
The invention has the beneficial effects as follows:
1) algae flow algae balloon rupture loss of buoyance behind the ballow, easily remove by coagulant sedimentation, and is effective;
2) do not need to add algicide in water and kill algae, the balloon rupture in the deep water pre-treatment in frustule, frustule does not break, and can not cause that the objectionable impurities such as algae toxin is discharged in water, has improved water supply security;
3) algae after balloon rupture is easily precipitated, and no longer needs to add a large amount of coagulating agent, has saved medicament, and current only need overcome the circulation well flow resistance, and energy consumption is low, so the present invention has reduced the running cost of water treatment.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention.
In figure: 1 working shaft, 2 water inlet pipes, 3 rising pipes, 4 water sources, 5 circulation wells, 6 outer wells, 7 interior wells, 8 water inlet pipes, 9 mixing pits, 10 agitators, 11 solution pools, 12 solution conduit, 13 valves, 14 reaction tanks, 15 perforate walls, 16 stirring rakes, 17 settling tanks, 18 effluent troughs, 19 rising pipes, 20 shore pipes, 21 mud valves, 22 waterwayss.
Embodiment
Further illustrate in conjunction with the accompanying drawings and embodiments the present invention.The embodiment of the present invention is comprised of working shaft 1, circulation well 5, water treating pond (being comprised of mixing pit 9, reaction tank 14, settling tank 17) and chemicals dosing plant etc. as shown in Figure 1.The import and export of working shaft 1 are connected with respectively pump water inlet 2 and pumping line 3, and pump water inlet 2 stretches in water source 4, and pumping line 3 is connected with the outer well 6 of circulation well 5.
Circulation well 5 is cylindrical closed vessel, formed by outer well 6 and interior well 7, interior well 7 diameters are less than outer well 6, be positioned at outer well 6 inside, interior well 7 tops are fixed on outer well 6 tops, bottom end opening, and leave outer shaft bottom certain distance, interior well 7 tops are connected with mixing pit water inlet pipe 8, and circulation well is vertically installed, degree of depth 60m.
Working shaft injects outer well with algae-containing water, flows to the shaft bottom downwards, then from interior aboveground liter, enters mixing pit through water inlet pipe, and the air bag in frustule breaks under circulation well deep water High Pressure, makes the algae loss of buoyance be easy to precipitation.
Mixing pit 9 is the pond of top end opening, the center is equipped with agitator 10, mixing pit water inlet pipe 8 is from mixing pit 9 side accesses, the mixing pit 9 of a side relative to mixing pit water inlet pipe 8 is connected with reaction tank 14, between separate with perforate wall 15, solution conduit 12 is connected with liquor box 11, and solution conduit 12 outlets are stretched in mixing pit 9.
Reaction tank 14 is the rectangular pool of top end opening, is separated at least three lattice along water (flow) direction with perforate wall 15, in every lattice of reaction tank 14, stirring rake 16 is installed.
Settling tank 17 is the rectangular pool of top end opening, on wall, water surface site is equipped with effluent trough 18 endways, on settling tank 17 end walls, settling tank rising pipe 19 is installed, the import of settling tank rising pipe 19 is stretched in effluent trough 18, outlet is stretched out outside settling tank 17, settling tank 17 bottoms are equipped with sludge from sedimentation tank pipe 20 and stretch out and enter waterways 22 outside the pond, and 20 outlets of sludge from sedimentation tank pipe are equipped with mud valve 21.
Described sludge from sedimentation tank pipe 20 is perforated pipe, longitudinally offers the circular hole of two row's diameter 20mm.
The algae-containing water that is provided by working shaft in water treating pond (circulation well 5, mixing pit 9, reaction tank 14) by chemicals dosing plant add that coagulating agent mixes, reaction and precipitation process, it is characterized in that, the described algae-containing water dark ballow of 60m at least of flowing through before entering water treating pond makes the air bag in the frustule in algae-containing water break loss of buoyance and be easy under the deep water high pressure.
Through the algae-containing water of deep water circulation flow through successively mixing pit, reaction tank and settling tank, coagulating agent and algae and the collision of other impurity particles are combined into larger floc particle, precipitation removal in settling tank.The method makes the algae balloon rupture, and sedimentation speed is fast, and removal effect is good; Do not destroy frustule, water supply security; Medicine consumes, energy consumption is low, and running cost is low.
Concrete experimental water is taken from the Jiangsu large-size lake, and in algae, the wawter bloom microcystic aeruginosa accounts for 95%.Experimental installation is processed final settling tanks water outlet algae chlorophyll a average removal rate 93% through native system as shown in Figure 1, and successful is better than prior art, polymerize aluminum chloride dosage 15mg/L, cost is low, and the microscope observing cell wall is intact, enchylema does not leak, and water is not caused secondary pollution.

Claims (2)

1. a deep water cyclic hardening coagulating sedimentation is except the algae water treatment system, comprise working shaft (1), water treating pond and chemicals dosing plant, working shaft (1), chemicals dosing plant connects water treating pond by pipeline respectively, be provided with the circulation well (5) of balloon rupture in the compressing frustule, circulation well is provided with import and outlet, the import of circulation well (5) connects described working shaft (1), the outlet of circulation well (5) connects described water treating pond, it is characterized in that, described circulation well (5) is cylindrical closed vessel, formed by outer well (6) and interior well (7), interior well (7) diameter is less than outer well (6) diameter, interior well (7) is positioned at outer well (6) inside, interior well (7) top is fixed on outer well (6) top, interior well (7) top is provided with outlet and connects water treating pond, the degree of depth of interior well (7) is less than the degree of depth of outer well (6), interior well (7) bottom end opening, circulation well is vertically installed, outer well (6) degree of depth is 60m at least, the wall of outer well (6) is provided with import and is connected with working shaft (1).
2. one kind is utilized deep water cyclic hardening coagulating sedimentation as claimed in claim 1 to remove the method for algae except the algae water treatment system, comprise the algae-containing water that provided by working shaft (1) in water treating pond by chemicals dosing plant add that coagulating agent mixes, reaction and precipitation process, it is characterized in that, the described algae-containing water dark ballow of 60m at least of flowing through before entering water treating pond makes the air bag in the frustule in algae-containing water break loss of buoyance and be easy under the deep water high pressure.
CN 201210109541 2012-04-16 2012-04-16 Deepwater circulating and enhanced coagulating sedimentation algae-removing water treatment system and method Expired - Fee Related CN102633383B (en)

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CN106310992B (en) * 2016-09-28 2018-12-04 西安建筑科技大学 A kind of pressurization of static mixing type deep-well, which is strengthened, removes cyanobacteria water treatment facilities
CN106348357B (en) * 2016-09-28 2019-06-11 西安建筑科技大学 Control algae water treatment facilities are strengthened in a kind of unpowered dispensing and the pressurization of hybrid deep-well
CN106830110B (en) * 2017-01-10 2023-08-11 无锡德林海环保科技股份有限公司 Gas-liquid mixed flow algae removal device
CN108383182B (en) * 2018-05-11 2024-03-08 西安建筑科技大学 Deep well mixing reactor with gradual change section
CN109574383A (en) * 2018-12-06 2019-04-05 重庆市李家沱排水有限公司 A kind of High-rate sedimentation pond ecological drop phytem system
CN110498519B (en) * 2019-08-21 2024-02-13 西安建筑科技大学 Shallow stagnant water body air-lift deep well pressurization algae control and pollution removal equipment

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