CN103319028A - Recovering method of sludge water of water treatment plant - Google Patents
Recovering method of sludge water of water treatment plant Download PDFInfo
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- CN103319028A CN103319028A CN2013102790791A CN201310279079A CN103319028A CN 103319028 A CN103319028 A CN 103319028A CN 2013102790791 A CN2013102790791 A CN 2013102790791A CN 201310279079 A CN201310279079 A CN 201310279079A CN 103319028 A CN103319028 A CN 103319028A
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Abstract
The invention discloses a recovering method of sludge water of a water treatment plant, wherein back wash water in a filter tank flows into a drain pond, supernate returns to a preliminary sedimentation tank after settlement, and bottom mud of a sludge drain pond is discharged to a sludge adjusting pond. Meanwhile, advection sediment sludge water flows into the sludge adjusting pond, the sludge water of which is lifted to enter into a pipe chute sedimentation tank, bottom mud after settlement enters into a sludge balancing pond, and supernate returns to the preliminary sedimentation tank. Mud of the sludge balancing pond enters into a floating pond after casting anionic polyacrylamide. The floating pond discharges concentrated sludge to a degassing pond, and supernate returns to the sludge adjusting pond. The mud discharged by the degassing pond enters into a centrifugal machine to be treated after adding anionic polyacrylamide. Mud cakes treated are conveyed outside, and separating water returns to the sludge adjusting pond. The method disclosed by the invention organically combines pipe chute settlement, coagulation treatment, and floating concentration, so that the method is good in concentration effect, high in solid content of mud discharged and good in effluent quality. The method can be used for reuse of water supply treatment, and the treatment cost of the sludge water is reduced.
Description
Technical field
The present invention relates to the spoil disposal water recovery processing method, specifically, relate to the spoil disposal water recovery processing method that a kind of water purification plant produces.
Background technology
City water purification plant has produced a large amount of spoil disposal water when producing tap water, if the not treated direct discharging of these spoil disposal water not only can cause the waste of water resources, also can polluted-water, and block the river course.
At present built up the spoil disposal engineering of water treatment in some big cities of China, its treatment scheme generally all has adjusting, concentrates, dewaters, disposes four road basic working procedure, and wherein enrichment process generally all adopts the gravity type boat davit concentration basin, and is once concentration.Once concentration can cause concentrated effect not good enough, thereby increases the processing load of follow-up whizzer, causes the somewhat expensive of processing, can greatly increase investment and the water producing cost of water factory.
To have efficient high and use wider air supporting concentration technology in sewage disposal, and hydraulic detention time is short, and the structures volume is little, and to characteristics such as the hydraulic load surge capability are strong, but the air supporting concentration technology seldom is applied to the processing of water purification plant's spoil disposal water.This is that the institute such as the impurity in the spoil disposal water is electrically charged in addition is negative charge owing to needing to add the polyacrylamide polymeric flocculant in the air supporting concentration technology in air supporting, and therefore, the cationic polyacrylamide that need add with positive charge just can have good effect.But because monomer content is higher in the cationic polyacrylamide, and the polyacrylamide amine monomers can be through absorptions such as the skin of human body, mucous membrane, respiratory tracts, the neural system of harmful to human, and may be carcinogenic.So, usually do not use the air supporting concentration technology in water purification plant's spoil disposal water treatment, even if adopted the air supporting concentration technology, the supernatant liquor after the processing can not be recycled.
Summary of the invention
The present invention will solve, and to be that existing spoil disposal water treatment is disposable gravity type boat davit concentrated, the technical problem that concentrated effect is not good enough, a kind of water purification plant spoil disposal water recovery processing method is provided, adopt the method to process water purification plant's spoil disposal water, can improve the recycling efficient of water purification plant's spoil disposal water, reduce the quantity discharged of waste water, save great lot of water resources.
In order to solve the problems of the technologies described above, the present invention is achieved by following technical scheme:
A kind of water purification plant spoil disposal water recovery processing method, the method is carried out according to following steps:
A. filter back washing water flows into the mud blowoff basin, and supernatant liquor is back to preliminary sedimentation tank after precipitation, and mud blowoff basin bed mud enters the sludge conditioning pond; Advection sedimentation spoil disposal water flows into the sludge conditioning pond simultaneously;
B. spoil disposal water enters tube settler through lifting in the sludge conditioning pond, and bed mud enters the mud balancing tank after precipitation, and supernatant liquor passes back into preliminary sedimentation tank;
C. mud balancing tank spoil disposal enters air flotation pool after adding 2.5～6kg/tDS anionic polyacrylamide;
D. air flotation pool enters degassed pond by cleaning shoe with concentrated mud, and supernatant liquor is back to the sludge conditioning pond;
E. degassed pond spoil disposal enters the centrifuge treating reason after adding 2～6kg/tDS anionic polyacrylamide, the mud cake outward transport after the processing, and Separation of Water is back to the sludge conditioning pond.
Preferably, the dosage of anionic polyacrylamide is 2.5～3.5kg/tDS among the step c.
More preferably, the dosage of anionic polyacrylamide is 3kg/tDS among the step c.
Preferably, the dosage of anionic polyacrylamide is 3.5～4.5kg/tDS among the step e.
More preferably, the dosage of anionic polyacrylamide is 4kg/tDS among the step e.
The invention has the beneficial effects as follows:
(1) the present invention has adopted tube settling gravity concentration and air supporting concentrated two to go on foot concentrated method, and before air flotation pool, add and have larger molecular weight, the anionic polyacrylamide that the adsorption bridging flocculating effect is better and acrylamide monomer is less, acrylamide monomer content is lower than the standard limited value (drinking water sanitary standard (GB5749-2006)) of 0.0005mg/L in the rear supernatant liquor of processing, be better than the water quality after cationic polyacrylamide is processed, the mud solid content is also by 1.5% bringing up to more than 2% of adding cationic polyacrylamide in addition, so that water purification plant of the present invention spoil disposal water recovery processing method has a concentrated effect is good, the mud extraction solid content is high, the advantages such as effluent quality is good;
(2) water purification plant of the present invention spoil disposal water recovery processing method with tube settling, coagulating treatment, air supporting is concentrated organically combines, utilizing tube settler to carry out gravitational settling separates, both can alleviate the load that follow-up air supporting is processed, save again processing cost; Carry out coagulating treatment after adding anionic polyacrylamide, make it to be formed with the flco that is beneficial to the air supporting processing; The high efficiency of processing in conjunction with air supporting at last; Give full play to the advantage of each technique and the synergy between technique, acrylamide monomer content is low in the supernatant liquor, and the mud extraction solid content is high, thereby obtains water outlet and the mud extraction of high-quality.
(3) mud of water purification plant of the present invention spoil disposal water recovery processing method generation can directly be transported outward, and the effluent quality of separating satisfies the national regulation requirement, because use anionic polyacrylamide, supernatant liquor after treatment can be used for the reuse of water purification plant's spoil disposal water treatment; When reaching identical solid content after air supporting is processed, the dosage of anionic polyacrylamide is lower than cationic polyacrylamide, and the cost ratio cationic polyacrylamide of anionic polyacrylamide is low more than 30%, has therefore reduced the processing cost of spoil disposal water.
(4) water purification plant of the present invention spoil disposal water recovery processing method has reduced the quantity discharged of waste water by the recycling to spoil disposal water, has saved a large amount of water resourcess, has significant social benefit, environmental benefit and economic benefit.
Description of drawings
Accompanying drawing is the FB(flow block) of water purification plant provided by the present invention spoil disposal water recovery processing method.
Embodiment
The present invention is described in further detail below by specific embodiment, and following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Water purification plant's spoil disposal water recovery processing method of the present embodiment adopts to be finished with lower device:
A mud blowoff basin and a sludge conditioning pond, be used for regulating backwashing water water quality and the water yield, filter back washing water flows into the mud blowoff basin by pipeline, and the bed mud of mud blowoff basin enters the sludge conditioning pond by mud discharge car through pipeline, and advection sedimentation spoil disposal water flows into the sludge conditioning pond by pipeline;
A tube settler links to each other with the sludge conditioning pond by pipeline, and what be equipped with inclination in the tube settler becomes 60 with the plane
0The inclined tube at angle;
A mud balancing tank links to each other with tube settler by pipeline;
An air flotation pool links to each other with the mud balancing tank by pipeline, and air flotation pool is air-dissolving air-float, and polyacrylamide dispensing point is arranged on the pipeline;
A degassed pond links to each other with air flotation pool by pipeline;
A whizzer links to each other with degassed pond by pipeline, and polyacrylamide dispensing point is arranged on the pipeline.
As shown in drawings, filter back washing water enters the mud blowoff basin under action of gravitation, and supernatant liquor passes back into preliminary sedimentation tank after precipitation, and mud blowoff basin bed mud sludge from sedimentation tank water in the water-purifying process that enters the sludge conditioning pond enters tube settler.
Bed mud after the tube settler precipitation enters the mud balancing tank, and supernatant liquor passes back into preliminary sedimentation tank.
The mud that stirs through the mud balancing tank enters air flotation pool, is furnished with a cover flocculation apparatus before the air flotation pool, be provided with adding a little of the gentle water mixed liquid of polyacrylamide advancing the mud pipeline, be used for adding 2.5～6kg/tDS anionic polyacrylamide medicament, mud, water, gas are contacted in pipeline and begin and react, make micro-bubble and the abundant combination of particle that flocculation forms through reciprocal pipeline, be conducive to the floating of flco in air flotation pool.The air flotation pool front portion is provided with waved plate, can increase the chance that flco is in contact with one another collision, and the gathering that is conducive to flco increases.
Along with the particle with micro-bubble constantly float, condense form larger flco after, air flotation pool top cleaning shoe is scraped it in dreg collecting slot, in action of gravitation flowed into degassed pond, the air supporting supernatant liquor passed back into the sludge conditioning pond.
Degassed pond when guaranteeing sludge concentration and stability of flow, mud can be carried out degassed, in order to avoid affect the operation of follow-up whizzer.
The mud extraction of degassed pond enters whizzer, is provided with polyacrylamide dispensing point advancing the mud pipeline, adds 2～6kg/tDS anionic polyacrylamide and carries out centrifuge dehydration.Mud after the centrifuge dehydration is transported outward with truck, and supernatant liquor passes back into the sludge conditioning pond.
Embodiment 1
Certain filter tank backwash water and sludge from sedimentation tank water are tested, and condition of water quality is: water temperature is 11.2～12.8 ℃, and advancing mud concentration is 0.15～0.41%.Filter back washing water at first enters the mud blowoff basin under action of gravity, supernatant liquor passes back into preliminary sedimentation tank after the precipitation, bed mud drains into the sludge conditioning pond by mud discharge car, mix through stirring rake with advection sedimentation spoil disposal water, then deliver to tube settler in the backwash water that reclaims the equalizing tank discharge by submersible pump, supernatant liquor is back to preliminary sedimentation tank after the precipitation, bed mud enters balancing tank, the mud that stirs through balancing tank, enter air flotation pool, enter air flotation pool after adding the 2.5kg/tDS anionic polyacrylamide, the supernatant liquor after the processing passes back into the sludge conditioning pond, and mud is scraped to degassed pond by cleaning shoe and carried out degassed mixing, after adding the 2kg/tDS anionic polyacrylamide, enter whizzer, supernatant liquor after centrifugal is back to the sludge conditioning pond, and mud enters the airing field, is transported by truck.
Bed mud of the every 20min discharging of air flotation pool, drain time is 30s.Whizzer moves 10h every day, and each run is complete to carry out back flushing.
After measured, tube settler water outlet average turbidity is 7.2NTU, and permanganate index is 9mg/L, and the mud extraction solid content is 1.0%; Air flotation pool supernatant liquor water outlet average turbidity is 12.3NTU, and permanganate index is 15mg/L, and acrylamide monomer content is 0.0001mg/L, and the mud extraction solid content is 2.5%; Whizzer supernatant liquor water outlet average turbidity is 46NTU, and permanganate index is 40.1mg/L, and acrylamide monomer content is 0.0001mg/L, and the mud extraction solid content is 18%.As seen, after present method was processed, air flotation pool and whizzer mud extraction solid content were high, and air flotation pool and whizzer supernatant liquor acrylamide monomer content meet national standard.
Embodiment 2
Certain filter tank backwash water and sludge from sedimentation tank water are tested, and condition of water quality is: water temperature is 13.1～14.9 ℃, and advancing mud concentration is 0.20～0.51%.Filter back washing water at first enters the mud blowoff basin under action of gravity, supernatant liquor passes back into preliminary sedimentation tank after the precipitation, bed mud drains into the sludge conditioning pond by mud discharge car, mix through stirring rake with advection sedimentation spoil disposal water, then deliver to tube settler in the backwash water that reclaims the equalizing tank discharge by submersible pump, supernatant liquor is back to preliminary sedimentation tank after the precipitation, bed mud enters balancing tank, the mud that stirs through balancing tank, enter air flotation pool, enter air flotation pool after adding the 3kg/tDS anionic polyacrylamide, the supernatant liquor after the processing passes back into the sludge conditioning pond, and mud is scraped to degassed pond by cleaning shoe and carried out degassed mixing, after adding the 3.5kg/tDS anionic polyacrylamide, enter whizzer, supernatant liquor after centrifugal is back to the sludge conditioning pond, and mud enters the airing field, is transported by truck.
Bed mud of the every 20min discharging of air flotation pool, drain time is 30s.Whizzer moves 10h every day, and each run is complete to carry out back flushing.
After measured, tube settler water outlet average turbidity is 7.7NTU, and permanganate index is 10mg/L, and the mud extraction solid content is 1.1%; Air flotation pool supernatant liquor water outlet average turbidity is 13.8NTU, and permanganate index is 19.2mg/L, and acrylamide monomer content is 0.0002mg/L, and the mud extraction solid content is 2.6%; Whizzer supernatant liquor water outlet average turbidity is 50NTU, and permanganate index is 43.7mg/L, and acrylamide monomer content is 0.0002mg/L, and the mud extraction solid content is 18.3%.As seen, after present method was processed, air flotation pool and whizzer mud extraction solid content were high, and air flotation pool and whizzer supernatant liquor acrylamide monomer content meet national standard.
Embodiment 3
Certain filter tank backwash water and sludge from sedimentation tank water are tested, and water temperature is 15.5～18.2 ℃, and advancing mud concentration is 0.21～0.53%.Filter back washing water at first enters the mud blowoff basin under action of gravity, supernatant liquor passes back into preliminary sedimentation tank after the precipitation, bed mud drains into the sludge conditioning pond by mud discharge car, mix through stirring rake with advection sedimentation spoil disposal water, then deliver to tube settler in the backwash water that reclaims the equalizing tank discharge by submersible pump, supernatant liquor is back to preliminary sedimentation tank after the precipitation, bed mud enters balancing tank, the mud that stirs through balancing tank, enter air flotation pool, enter air flotation pool after adding the 3.5kg/tDS anionic polyacrylamide, the supernatant liquor after the processing passes back into the sludge conditioning pond, and mud is scraped to degassed pond by cleaning shoe and carried out degassed mixing, after adding the 4kg/tDS anionic polyacrylamide, enter whizzer, supernatant liquor after centrifugal is back to the sludge conditioning pond, and mud enters the airing field, is transported by truck.
Bed mud of the every 20min discharging of air flotation pool, drain time is 30s.Whizzer moves 10h every day, and each run is complete to carry out back flushing.
After measured, tube settler water outlet average turbidity is 8.2NTU, and permanganate index is 12.5mg/L, and the mud extraction solid content is 1.1%; Air flotation pool supernatant liquor water outlet average turbidity is 15.1NTU, and permanganate index is 20.2mg/L, and acrylamide monomer content is 0.0003mg/L, and the mud extraction solid content is 2.6%; Whizzer supernatant liquor water outlet average turbidity is 52NTU, and permanganate index is 45.1mg/L, and acrylamide monomer content is 0.0003mg/L, and the mud extraction solid content is 19%.As seen, after present method was processed, air flotation pool and whizzer mud extraction solid content were high, and air flotation pool and whizzer supernatant liquor acrylamide monomer content meet national standard.
Embodiment 4
Certain filter tank backwash water and sludge from sedimentation tank water are tested, and water temperature is 17.3～20.5 ℃, and advancing mud concentration is 0.19～0.55%.Filter back washing water at first enters the mud blowoff basin under action of gravity, supernatant liquor passes back into preliminary sedimentation tank after the precipitation, bed mud drains into the sludge conditioning pond by mud discharge car, mix through stirring rake with advection sedimentation spoil disposal water, then deliver to tube settler in the backwash water that reclaims the equalizing tank discharge by submersible pump, supernatant liquor is back to preliminary sedimentation tank after the precipitation, bed mud enters balancing tank, the mud that stirs through balancing tank, enter air flotation pool, enter air flotation pool after adding the 4kg/tDS anionic polyacrylamide, the supernatant liquor after the processing passes back into the sludge conditioning pond, and mud is scraped to degassed pond by cleaning shoe and carried out degassed mixing, after adding the 4.5kg/tDS anionic polyacrylamide, enter whizzer, supernatant liquor after centrifugal is back to the sludge conditioning pond, and mud enters the airing field, is transported by truck.
Bed mud of the every 20min discharging of air flotation pool, drain time is 30s.Whizzer moves 10h every day, and each run is complete to carry out back flushing.
After measured, tube settler water outlet average turbidity is 10.1NTU, and permanganate index is 13.6mg/L, and the mud extraction solid content is 1.2%; Air flotation pool supernatant liquor water outlet average turbidity is 16.8NTU, and permanganate index is 20.8mg/L, and acrylamide monomer content is 0.0003mg/L, and the mud extraction solid content is 2.6%; Whizzer supernatant liquor water outlet average turbidity is 58NTU, and permanganate index is 46mg/L, and acrylamide monomer content is 0.0004mg/L, and the mud extraction solid content is 19.2%.As seen, after present method was processed, air flotation pool and whizzer mud extraction solid content were high, and air flotation pool and whizzer supernatant liquor acrylamide monomer content meet national standard.
Embodiment 5
Certain filter tank backwash water and sludge from sedimentation tank water are tested, and water temperature is 18.3～21.6 ℃, and advancing mud concentration is 0.18～0.49%.Filter back washing water at first enters the mud blowoff basin under action of gravity, supernatant liquor passes back into preliminary sedimentation tank after the precipitation, bed mud drains into the sludge conditioning pond by mud discharge car, mix through stirring rake with advection sedimentation spoil disposal water, then deliver to tube settler in the backwash water that reclaims the equalizing tank discharge by submersible pump, supernatant liquor is back to preliminary sedimentation tank after the precipitation, bed mud enters balancing tank, the mud that stirs through balancing tank, enter air flotation pool, enter air flotation pool after adding the 6kg/tDS anionic polyacrylamide, the supernatant liquor after the processing passes back into the sludge conditioning pond, and mud is scraped to degassed pond by cleaning shoe and carried out degassed mixing, after adding the 6kg/tDS anionic polyacrylamide, enter whizzer, supernatant liquor after centrifugal is back to the sludge conditioning pond, and mud enters the airing field, is transported by truck.
Bed mud of the every 20min discharging of air flotation pool, drain time is 30s.Whizzer moves 10h every day, and each run is complete to carry out back flushing.
After measured, tube settler water outlet average turbidity is 7.5NTU, and permanganate index is 9.3mg/L, and the mud extraction solid content is 1.1%; Air flotation pool supernatant liquor water outlet average turbidity is 11.8NTU, and permanganate index is 13.8mg/L, and acrylamide monomer content is 0.0004mg/L, and the mud extraction solid content is 2.7%; Whizzer supernatant liquor water outlet average turbidity is 42NTU, and permanganate index is 38mg/L, and acrylamide monomer content is 0.0004mg/L, and the mud extraction solid content is 20.2%.As seen, after present method was processed, air flotation pool and whizzer mud extraction solid content were high, and air flotation pool and whizzer supernatant liquor acrylamide monomer content meet national standard.
Although the above is described the preferred embodiments of the present invention by reference to the accompanying drawings; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, these all belong within protection scope of the present invention.
Claims (5)
1. water purification plant's spoil disposal water recovery processing method is characterized in that, the method is carried out according to following steps:
A. filter back washing water flows into the mud blowoff basin, and supernatant liquor is back to preliminary sedimentation tank after precipitation, and mud blowoff basin bed mud enters the sludge conditioning pond; Advection sedimentation spoil disposal water flows into the sludge conditioning pond simultaneously;
B. spoil disposal water enters tube settler through lifting in the sludge conditioning pond, and bed mud enters the mud balancing tank after precipitation, and supernatant liquor passes back into preliminary sedimentation tank;
C. mud balancing tank spoil disposal enters air flotation pool after adding 2.5～6kg/tDS anionic polyacrylamide;
D. air flotation pool enters degassed pond by cleaning shoe with concentrated mud, and supernatant liquor is back to the sludge conditioning pond;
E. degassed pond spoil disposal enters the centrifuge treating reason after adding 2～6kg/tDS anionic polyacrylamide, the mud cake outward transport after the processing, and Separation of Water is back to the sludge conditioning pond.
2. a kind of water purification plant according to claim 1 spoil disposal water recovery processing method is characterized in that, the dosage of anionic polyacrylamide is 2.5～3.5kg/tDS among the step c.
3. a kind of water purification plant according to claim 2 spoil disposal water recovery processing method is characterized in that, the dosage of anionic polyacrylamide is 3kg/tDS among the step c.
4. a kind of water purification plant according to claim 1 spoil disposal water recovery processing method is characterized in that, the dosage of anionic polyacrylamide is 3.5～4.5kg/tDS among the step e.
5. a kind of water purification plant according to claim 4 spoil disposal water recovery processing method is characterized in that, the dosage of anionic polyacrylamide is 4kg/tDS among the step e.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293845A (en) * | 2015-10-26 | 2016-02-03 | 广州立白企业集团有限公司 | Treatment method for sludge reduction |
| CN110448940A (en) * | 2018-05-07 | 2019-11-15 | 浙江联池水务设备股份有限公司 | A kind of water treatment plant's water for drainage slurry system and processing method |
| CN110963603A (en) * | 2019-11-27 | 2020-04-07 | 复旦大学 | Water supply plant sludge water recycling system for removing enhanced pollutants |
-
2013
- 2013-07-04 CN CN2013102790791A patent/CN103319028A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 李荣光 等: "气浮工艺在水厂排泥水处理中的应用", 《供水技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293845A (en) * | 2015-10-26 | 2016-02-03 | 广州立白企业集团有限公司 | Treatment method for sludge reduction |
| CN110448940A (en) * | 2018-05-07 | 2019-11-15 | 浙江联池水务设备股份有限公司 | A kind of water treatment plant's water for drainage slurry system and processing method |
| CN110448940B (en) * | 2018-05-07 | 2024-01-23 | 浙江联池水务设备股份有限公司 | Mud water treatment system and mud water treatment method for water purification plant |
| CN110963603A (en) * | 2019-11-27 | 2020-04-07 | 复旦大学 | Water supply plant sludge water recycling system for removing enhanced pollutants |
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Application publication date: 20130925 |