CN108178492A - A kind of municipal administration domestic sludge floatation thickening processing equipment and method - Google Patents
A kind of municipal administration domestic sludge floatation thickening processing equipment and method Download PDFInfo
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- CN108178492A CN108178492A CN201810037247.9A CN201810037247A CN108178492A CN 108178492 A CN108178492 A CN 108178492A CN 201810037247 A CN201810037247 A CN 201810037247A CN 108178492 A CN108178492 A CN 108178492A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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Abstract
The present invention relates to a kind of sludge disposal technology more particularly to a kind of municipal administration domestic sludge floatation thickening processing equipments and method, belong to pollutant treatment technical field.A kind of municipal administration domestic sludge floatation thickening processing equipment, the equipment include carrying out quantitative dosing, mixing, the sludge conditioning unit reacted and the cavitation air flotation upgrading unit that air is dissolved in sludge to and completed separation；Setting is used for the air supporting head of the molten gas of cavitation in cavitation air flotation upgrading unit, air supporting head is connected with hollow rotary shaft, the air supporting head includes the spider connected with rotary shaft and multiple molten gas branch pipes mounted on spider side, and molten gas branch pipe has multiple micropores for ventilation.The equipment has many advantages, such as that unit processing capacity is big, concentration time is short, equipment is simple, power-saving, reflux ratio is adjustable, effectively solve during concentration containing municipal administration domestic sludge existing for take up a large area, digestion, release the problems such as phosphorus reaction, equipment is numerous and jumbled.
Description
Technical field
The present invention relates to a kind of sludge disposal technology more particularly to a kind of municipal administration domestic sludge floatation thickening processing equipment and
Method belongs to pollutant treatment technical field.
Background technology
With the quickening of Urbanization in China, sanitary sewage disposal rate steps up, institute during sanitary sewage disposal
The sludge of generation has the characteristics that moisture content is high, volume is big, the content of organic matter is high, stability is poor, foul smelling, and quantity is also increasingly
It is more, simultaneously because the threat of noxious material and pathogen to environmental and human health impacts in the high cost and sludge of Treatment of Sludge, by
This environmental problem brought becomes increasingly conspicuous, and the processing disposition of sludge causes highest attention.
The treatment technology of municipal sludge mainly has sludge concentration and dewatering, aerobic sigestion, anaerobic digestion, desiccation, compost
With burn etc..Wherein, sludge concentration and dewatering be processing, disposing sludge the first step, to reducing the sludge volume of subsequent processing, side
Just the normal operation important in inhibiting of the conveying of sludge and subsequent treatment process.It is dense that the concentration technique of sludge is broadly divided into gravity
Contracting, mechanical thickening and floatation thickening three classes, China's sludge from wastewater treatment plant concentration technique are mainly used based on gravity concentration.
Traditional gravity concentration, mechanical thickening are still the sludge condensation technique of current sewage treatment plants mainstream, gravity
The ratio that concentration technology is applied in wastewater treatment in China factory is more than 70%, but both techniques also exist very in application process
More problems.
Gravity concentration tank is still the major technique of sludge from wastewater treatment plant concentration at present.Although technology, construction
It is simple with operational management, but take up a large area, sanitary condition it is poor.During without aeration agitation, sludge may occur in pond
Anaerobic digestion, Mud up-floating, so as to influence concentrated effect, this anaerobic state also makes the absorbed phosphorus release of sludge, again into
Among entering sewage, cause water outlet phosphorus exceeded.Underwater bearing easy break-down mounted on gravity concentration tank center, stirring grid are perishable
Erosion, needs frequently to overhaul.Sludge solid content after gravity concentration is low, especially for the gravity concentration of residual active sludge, one
As after concentration sludge solid content be no more than 4%, solid content is low to increase subsequent processing structures volume, increase investment and run into
This, with the development of sewage treatment process and the raising of effluent-disposal standard, the particularly raising to the requirement of denitrogenation dephosphorizing, makes
Application of the gravity concentration technique in terms of residual active sludge concentration is restricted.
Mechanical thickening includes centrifugal concentrating, the concentration of belt thickener machine and rotary drum, spiral shell pressure thickener concentration etc..Centrifugal concentrating accounts for
Ground is small, will not generate stench, and the total dephosphorization of sludge treating system can be improved to avoid the secondary release of phosphorus for rich phosphorous sludge
Rate, low cost, but operating cost and flight-line maintenance are costly, less economical, are generally rarely used in sludge condensation, but for being difficult to
Use can be considered in the residual active sludge of concentration.Belt thickener machine is mainly used for the concentration of integration of sludge concentrating and dewatering equipment
Section, belt thickener owner will form by frame, into mud proportioner, dehydration filter cloth, adjustable mud rake and mud dam.Belt thickener machine is normal
See that strainer sideslip, sludge be excessive and the failures such as strainer arch camber, influence operation and the environment of belt thickener machine.Rotary drum, spiral shell pressure concentration
Machine or similar device are mainly used for the enriching section of thickening integration apparatus, rotary drum, spiral shell pressure concentration is will be through chemical coagulation
Sludge carry out screw propulsion dehydration and extrusion dehydration, it is a kind of easy to be high to be that moisture percentage in sewage sludge reduces for rotary drum, spiral shell pressure thickener
The mechanical equipment of effect.
The application of domestic floatation thickening technology is relatively fewer, lacks system research to related process parameters and equipment.In state
Outside, nineteen eighty-three Sweden Simona Cizinska develop organism gas float sludge condensation technique, add in nitrate using sludge
Itself denitrifying capacity, sludge, which carries out denitrification generation gas, to be made Mud up-floating and is concentrated.Organism gas float concentrates work
The daily running expense of skill is lower than pressure air-dissolving air-float sludge condensation technique, and energy consumption is small, and equipment is simple, convenient operation and management, but
Sludge retention time is longer than pressure air-dissolving air-float concentration technology, need to add nitrate.
Floatation thickening is divided into as air-dissolving air-float, organism gas float and cavitation air flotation three classes.Air-dissolving air-float is deposited using more
In equipment complexity, the problems such as operational administrative is difficult；Organism gas float utilizes the denitrification of sludge, and operation is simple, low energy consumption, but
It is that the residence time is long, is also easy to produce foul smell and releases phosphorus reaction；Cavitation air flotation is with equipment is simple, the residence time is short, Bu Huifa
The advantages that giving birth to anaerobic reaction and releasing phosphorus reaction has greater advantage, but domestic floatation thickening on concentrated effect and cost of investment
The application of technology is less, lacks system research to related process parameters and equipment.
Invention content
The present invention provides a kind of municipal administration domestic sludge floatation thickening processing equipment, which has that concentration time is short, equipment
Simply, power-saving, the advantages that reflux ratio is adjustable, effectively solve during concentration containing municipal administration domestic sludge existing for occupation of land face
Product is big, digestion, releases the problems such as phosphorus reaction, equipment is numerous and jumbled.
The present invention also provides a kind of municipal administration domestic sludge concentration methods.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of municipal administration domestic sludge floatation thickening processing equipment, the equipment include carrying out quantitative dosing, mixing, the sludge tune reacted
Reason unit and the cavitation air flotation upgrading unit that air is dissolved in sludge to and completed separation；It is set in cavitation air flotation upgrading unit
For the air supporting head of the molten gas of cavitation, air supporting head is connected with hollow rotary shaft, which includes the center connected with rotary shaft
Disk and multiple molten gas branch pipes mounted on spider side, molten gas branch pipe have multiple micropores for ventilation.
The excess sludge generated during municipal sanitary sewage disposal, the municipal administration that the present invention is entered after chemical conditioning are raw
Sludge air supporting concentration equipment living, realizes dissolved air flotation, the sludge of floating is carried out dehydrating, and clear liquid is sent after the molten gas of cavitation
Sewage disposal system is returned, the mixed liquor after concentration again passes by the molten gas of cavitation, dissolved air flotation after being recycled by inside, realize continuous
Constantly sludge condensation has many advantages, such as that concentration time is short, equipment is simple, power-saving, reflux ratio is adjustable, effectively solves containing municipal administration
It is existing during domestic sludge concentration to take up a large area, digestion, release the problems such as phosphorus reaction, equipment is numerous and jumbled, have
Extensive technical advance and advantageous effect.
The present invention is realized preferably using cavitation air flotation principle by chemical conditioning, under specific run control parameter
Sludge condensation treatment effect, with floor space is small, the residence time is short, low engineering cost, management operating are easy, operating cost is low
The advantages that, no anaerobic reaction, which generates foul smell and releases phosphorus reaction, leads to the underproof risk of water quality.
Adjustable effluent weir and central reaction cylinder in cavitation air flotation upgrading unit are used to control reflux ratio；The processing of highest unit
Ability >=250t/h can meet the needs of various scale sewage treatment plants.
Preferably, cavitation air flotation upgrading unit includes cavitation air flotation concentration basin, sludge conditioning unit passes through central feeding
Pipe is connected with the bottom of cavitation air flotation concentration basin, is set at center there are one central reaction cylinder in cavitation air flotation concentration basin, in
The interlude of heart reaction tube is cylindrical, and the upper and lower ends of central reaction cylinder are horn mouth, and the air supporting head is mounted on center
At reaction tube inner axes, the inner wall of cavitation air flotation concentration basin is equipped with adjustable effluent weir, the top outer rim of central reaction cylinder and whirlpool
Sludge sump is equipped between the inner wall in recessed floatation thickening pond.
Preferably, sludge conditioning unit is conditioner, cavitation air flotation concentration basin has bipyramid bottom.
Preferably, air supporting head is located at bottom and the lower end horn mouth import in central reaction cylinder in central reaction cylinder
Place.
Preferably, sludge sump is equipped with the mud guard higher than liquid level close to the side of cavitation air flotation concentration basin inner wall, it should
Mud guard makes the left and right sides of sludge sump low while height, is conducive to collect thickened sludge, clear liquid is overflowed from mud guard to be flowed to
Adjustable effluent weir.
Preferably, the spider, which is top, is equipped with the opening being connected with rotary shaft and the circle that inside is cavity
Cylinder, the uniformly distributed several side openings being connected with molten gas branch pipe of outer wall of spider.
Preferably, each molten gas branch pipe is radially distributed around spider centered on spider.
Preferably, the molten gas branch pipe is hollow linear type pipe or shaped form pipe.Due to the structure of linear type pipe
Rule, easy to process, the molten gas branch pipe that linear type pipe can be as air supporting head diameter in the case of smaller is more preferably selected；Air supporting head exists
In high-speed rotation, rotating speed is generally 1500r/min-3500r/min, and with the increase of air supporting head diameter, molten gas branch pipe is remote
The linear velocity at end, since the pressure drag and speed of liquid are into quadratic relation, is meeting molten gas needs compared with other position biggers
A large amount of power consumption is on pressure drag is overcome afterwards.At this moment it is full under normal revolution using shaped form pipe as molten gas branch pipe
After the linear velocity that the molten gas of foot needs, molten gas branch pipe distal portions are bent into streamlined away from direction of rotation, reduce perpendicular to molten gas
The velocity vector of branch pipe, so as to substantially reduce pressure drag.Although objective bending part that increases is along molten gas branch during this
The velocity vector of pipe, but since viscosity resistance is directly proportional to the first power of speed, and the quadratic power of pressure drag and speed into
Direct ratio, in terms of comprehensive, in the case of identical air supporting head diameter, the molten gas branch pipe of shaped form pipe can reduce more than 20% fortune
Row resistance, and drag-reduction effect is advanced optimized with the increase of air supporting head diameter, so as to reduce corresponding power consumption, tool
There is good energy-saving effect.
Preferably, the quantity of the molten gas branch pipe is 2 or more.
Preferably, the micropore is set on the side that molten gas branch pipe deviates from direction of rotation.The benefit designed in this way is gas
During high speed rotation clockwise of raising the nose above water to breathe, at the direction of rotation back side, molten gas branch pipe has separation trend with liquid, forms environment under low pressure, herein
Pressure is less than surrounding liquid and atmospheric pressure, and air enters liquid by rotary shaft, spider, molten gas branch pipe and micropore, and
Tiny bubble is dispersed under the molten high-speed rotating stirring action of gas branch pipe, to sweep along the sludge and other solid particles in liquid
Float, realize molten gas, dissolved air flotation process.
Preferably, the micro-pore diameter is 0.1mm-20mm.
A kind of municipal administration domestic sludge concentration method, this method are：Municipal administration domestic sludge enters sludge conditioning unit, throws
Add PAM stirring conditionings, cavitation air flotation concentration basin is entered by central feed tube under the effect of gravity later；PAM dosages are
1.5kg/tDS-2.5kg/tDS；In cavitation air flotation concentration basin, realize that efficient uniformly molten gas, bubble are wrapped up in by air supporting head
It holds mud granule floating upward quickly in central reaction cylinder in the case where buoyancy and flow drive under the arm, passes through the diffuser on central reaction cylinder top
It after deceleration, is spread in the horizontal direction to periphery, molten bladdery sludge is detached with water realization, and sludge is collected by sludge sump and arranged
Walk, the clear liquid after separation is drained by the collection of adjustable effluent weir, the unsegregated sludge in part along central reaction cylinder and flotation tank it
Between circulation canal be again introduced into inside central reaction cylinder, molten gas carries out floatation thickening point again together with the sludge newly entered
From.
In cavitation air flotation concentration basin, the air supporting time≤1min, disengaging time≤8min, reflux ratio 10%-150%, gas
Floating concentration sludge per ton consumes power≤50w, molten tolerance >=10mL/L per hour.
The beneficial effects of the invention are as follows：Municipal administration domestic sludge concentration method provided by the invention passes through simple chemistry
After conditioning, floatation thickening is carried out.Using the molten gas principle of cavitation, by improved cavitation air flotation upgrading unit, realize at unit
More than reason ability 250t/h, residence time≤9min, mud extraction moisture content≤96%.Compared to existing gravity concentration technology, subtract significantly
The residence time is lacked, water outlet phosphorus caused by avoiding anaerobic reaction release foul smell and releasing phosphorus reaction is exceeded, while reduces occupation of land
Area；It is concentrated compared to existing mechanical thickening and air-dissolving air-float, reduces number of devices and installed power, had larger energy saving
Advantage；Compared to existing rectangle cavitation air flotation thickener, unit processing capacity bigger, reflux ratio is adjusted, and equipment is generally round
Cylindricality, without dead angle, adapt to the needs of fairly large sewage treatment plant.
Description of the drawings
Fig. 1 is the process schematic representation of the present invention；
Fig. 2 is the concentrator structure diagram of the present invention；
Fig. 3 is the structure diagram of the embodiment of the present invention 1；
Fig. 4 is the side view of the embodiment of the present invention 1；
Fig. 5 is the structure diagram of the embodiment of the present invention 2.
In figure：Conditioner 1, central feed tube 2, cavitation air flotation concentration basin 3, central reaction cylinder 4, adjustable effluent weir 5, air supporting
First 6, rotary shaft 7, side opening 61, micropore 62, molten gas branch pipe 63, spider 64, opening 65.
Specific embodiment
Below by specific embodiment, and with reference to attached drawing, technical scheme of the present invention is described in further detail.It should
Work as understanding, implementation of the invention is not limited to the following examples, the accommodation in any form done to the present invention and/or
Change falls within the scope of the present invention.
Embodiment 1：
A kind of municipal administration domestic sludge floatation thickening processing equipment as shown in Fig. 2, the equipment include carry out quantitative dosing, mixing, instead
The sludge conditioning unit answered and the cavitation air flotation upgrading unit that air is dissolved in sludge to and completed separation.Sludge in the present embodiment
Conditioning unit is conditioner 1, and conditioner 1 is connected by central feed tube 2 with the bottom of cavitation air flotation concentration basin 3, cavitation gas
Floating concentration basin 3 has a bipyramid bottom, and there are one central reaction cylinder 4, central reaction cylinders for setting at center in cavitation air flotation concentration basin 3
4 interlude is cylindrical, and the upper and lower ends of central reaction cylinder 4 are horn mouth, are equipped at 4 inner axes of central reaction cylinder
The air supporting head 6 being connect with rotary shaft 7, air supporting head are located at bottom and the lower end loudspeaker in central reaction cylinder 4 in central reaction cylinder 4
Mouth entrance.The inner wall of cavitation air flotation concentration basin 3 is equipped with adjustable effluent weir 5, top outer rim and the cavitation gas of central reaction cylinder 4
Sludge sump is equipped between the inner wall of floating concentration basin 3, sludge sump is equipped with close to the side of 3 inner wall of cavitation air flotation concentration basin higher than liquid
The mud guard in face, the mud guard make the left and right sides of sludge sump low on one side on one side high, are conducive to collection thickened sludge, and clear liquid is from gear
Mud plate overflows flow direction and may bring up mill weir 5.
The air supporting head for the molten gas of cavitation as shown in Figure 3 and Figure 4, the top of air supporting head connect hollow rotary shaft 7, should
Air supporting head includes six surfaces equipped with multiple micropores 62 and hollow molten gas branch pipe 63 and for connecting rotary shaft and molten gas
Branch pipe and hollow spider 64.Molten gas branch pipe is the linear type pipe with hollow-core construction, and micropore is set on molten gas branch pipe away from rotation
Turn the side in direction, micro-pore diameter 2mm.Spider is that top is equipped with the opening 65 that can be connected with rotary shaft and inside is
The cylinder of cavity, uniformly distributed six side openings 61 that can be connected with molten gas branch pipe of outer wall of spider.
One end connection spider of each molten gas branch pipe, six molten gas branch pipes are distributed in centered on spider in aplysia punctata
Around spider, each micropore is communicated with the inside of molten gas branch pipe, the inside phase of molten gas branch pipe, spider and hollow rotary shaft
It is logical.
In use, the air supporting head high speed rotation clockwise, at the direction of rotation back side, molten gas branch pipe has separation trend with liquid,
Formed environment under low pressure, herein pressure be less than surrounding liquid and atmospheric pressure, air by rotary shaft, spider, molten gas branch pipe and
Micropore enters liquid, and is dispersed into tiny bubble under the high-speed rotating stirring action of molten gas branch pipe, to sweep along in liquid
Sludge and other solid particles float, realize molten gas, dissolved air flotation process.
The process schematic representation of the present embodiment as shown in Figure 1, municipal administration domestic sludge after PAM (polyacrylamide) conditionings,
Into cavitation air flotation upgrading unit, dissolved air flotation is realized by the molten gas of cavitation.Made using water outlet weir plate and the collaboration of central reaction cylinder
With, conditioning of mud reflux ratio, ensure different under mud concentration, thickened sludge water content is ≤96%.
Municipal administration domestic sludge enters conditioner, after adding PAM stirring conditionings, passes through central feed tube under the effect of gravity
Into cavitation air flotation concentration basin 3.Realize that efficient uniformly molten gas, bubble sweep along mud granule by the air supporting head of special designing
In the case where buoyancy and flow drive in central reaction cylinder floating upward quickly, after being slowed down by the diffuser on central reaction cylinder top,
It is spread in horizontal direction to periphery, molten bladdery sludge is detached with water realization, and sludge is drained by sludge sump collection, after separation
Clear liquid drained by the collection of adjustable effluent weir, the unsegregated sludge in part is entered by central reaction cylinder inside reaction tube, and new
Molten gas carries out floatation thickening separation to the sludge of entrance again together.
Specifically, the charging rate of central feed tube is no more than 1m/s；Air supporting head periphery linear velocity is about 20m/s-
40m/s, the too low air that is unfavorable for dissolve in, and excessively high power consumption is larger；Upflow velocity is about 10mm/s- in central reaction cylinder
20mm/s；By the up and down adjustment of central reaction cylinder and water outlet weir plate, reflux ratio can adjust between 10%-150%, meet
The requirement of thickened sludge water content.
In the present embodiment, for municipal sanitary sewage excess sludge of the water content 99.6%, PAM conditioning dosages
When 1.8kg/tDS, reflux ratio 50% or so, sludge moisture content is between 95.5%-95.8% after concentration, and sludge per ton is per hour
It is about 35W to consume power, has good treatment effect.
The present embodiment compares existing gravity concentration technology, greatly reduces the residence time, and it is smelly to avoid anaerobic reaction release
Gas and to release water outlet phosphorus caused by phosphorus reaction exceeded, while reduces more than 50% floor space；Compared to existing mechanical thickening and molten
Gas floatation thickening, reduces number of devices and installed power, and floatation thickening sludge per ton consumes power≤50w, has per hour
Larger power savings advantages；It is concentrated compared to existing cavitation air flotation, unit processing capacity bigger, reflux ratio is adjusted, using circle
It arranges no dead angle, adapts to the needs of fairly large sewage treatment plant.
Embodiment 2：
A kind of municipal administration domestic sludge floatation thickening processing equipment, for concrete scheme with embodiment 1, the difference lies in as shown in Figure 5
A kind of air supporting head for the molten gas of cavitation, the top of air supporting head connects hollow rotary shaft 7, which includes six surfaces
Equipped with multiple micropores 62 and hollow molten gas branch pipe 63 and for connecting rotary shaft and molten gas branch pipe and hollow spider
64.Molten gas branch pipe is the shaped form pipe with hollow-core construction, and micropore is set on the side that molten gas branch pipe deviates from direction of rotation, and micropore is straight
Diameter is 5mm.Spider is that top is equipped with the opening 65 that can be connected with rotary shaft and the cylinder that inside is cavity, center
Uniformly distributed six side openings 61 that can be connected with molten gas branch pipe of the outer wall of disk.
One end connection spider of each molten gas branch pipe, six molten gas branch pipes are distributed in centered on spider in aplysia punctata
Around spider, each micropore is communicated with the inside of molten gas branch pipe, the inside phase of molten gas branch pipe, spider and hollow rotary shaft
It is logical.
For air supporting head in high-speed rotation clockwise, rotating speed is generally 1500r/min-3500r/min, with air supporting head
Diameter increases, and molten gas branch pipe distal end linear velocity is compared with other position biggers, since the pressure drag of liquid is closed with speed into quadratic power
System, a large amount of power consumption is on pressure drag is overcome after molten gas needs are met.By optimization design, molten gas branch pipe is curve
Type pipe, under normal revolution, after the linear velocity for meeting molten gas needs, molten gas branch pipe distal portions are bent into stream away from direction of rotation
Line style reduces the velocity vector perpendicular to molten gas branch pipe, so as to substantially reduce pressure drag.Although objective increase during this
Velocity vector of the bending part along molten gas branch pipe, but since viscosity resistance is directly proportional to the first power of speed, and pressure difference hinders
Power is directly proportional to the quadratic power of speed, and in terms of comprehensive, in the case of identical air supporting head diameter, as an optimization, embodiment 2 can be with
Reduce more than 20% resistance, and drag-reduction effect is advanced optimized with the increase of air supporting head diameter, it is corresponding so as to reduce
Power consumption, have good energy-saving effect.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
Either which part or all technical features are equal with modifying to the technical solution recorded in previous embodiment
It replaces；And these modifications or replacement, the model for technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. a kind of municipal administration domestic sludge floatation thickening processing equipment, it is characterised in that：The equipment includes carrying out quantitative dosing, mix
Conjunction, the sludge conditioning unit reacted and the cavitation air flotation upgrading unit that air is dissolved in sludge to and completed separation；Cavitation air flotation
Setting is used for the air supporting head of the molten gas of cavitation in upgrading unit, and air supporting head is connected with hollow rotary shaft, which includes and rotation
The spider and multiple molten gas branch pipes mounted on spider side of shaft connection, molten gas branch pipe have multiple for the micro- of ventilation
Hole.
2. municipal administration domestic sludge floatation thickening processing equipment according to claim 1, it is characterised in that：Cavitation air flotation concentrates
Unit includes cavitation air flotation concentration basin, and sludge conditioning unit is connected by central feed tube with the bottom of cavitation air flotation concentration basin
Logical, there are one central reaction cylinders for setting at center in cavitation air flotation concentration basin, and the interlude of central reaction cylinder is cylindrical, center
The upper and lower ends of reaction tube are horn mouth, and the air supporting head is mounted at central reaction cylinder inner axes, cavitation air flotation concentration basin
Inner wall be equipped with adjustable effluent weir, between the top outer rim of central reaction cylinder and the inner wall of cavitation air flotation concentration basin be equipped with sludge
Slot.
3. municipal administration domestic sludge floatation thickening processing equipment according to claim 2, it is characterised in that：Sludge conditioning unit
For conditioner, cavitation air flotation concentration basin has bipyramid bottom.
4. municipal administration domestic sludge floatation thickening processing equipment according to claim 2, it is characterised in that：During air supporting head is located at
Bottom and the lower end horn mouth entrance in central reaction cylinder in heart reaction tube.
5. municipal administration domestic sludge floatation thickening processing equipment according to claim 2, it is characterised in that：Sludge sump is close to whirlpool
The side of recessed floatation thickening pond inner wall is equipped with the mud guard higher than liquid level, which makes the left and right sides of sludge sump high on one side
It is low on one side, be conducive to collect thickened sludge, clear liquid overflows flow direction from mud guard and may bring up mill weir.
6. municipal administration domestic sludge floatation thickening processing equipment according to claim 1, it is characterised in that：Each molten gas branch pipe with
It is radially distributed around spider centered on spider.
7. municipal administration domestic sludge floatation thickening processing equipment according to claim 1, it is characterised in that：The spider
Be equipped with the opening that is connected with rotary shaft for top and cylinder that inside is cavity, the outer wall of spider uniformly it is several with it is molten
The side opening that gas branch pipe is connected.
8. municipal administration domestic sludge floatation thickening processing equipment according to claim 1, it is characterised in that：The molten gas branch
It manages as hollow linear type pipe or shaped form pipe, the micropore is set on the side that molten gas branch pipe deviates from direction of rotation.
9. a kind of municipal administration domestic sludge carried out using municipal administration domestic sludge floatation thickening processing equipment described in claim 1 is dense
Contracting processing method, it is characterised in that this method is：
Municipal administration domestic sludge enters sludge conditioning unit, adds PAM stirring conditionings, passes through central feeding under the effect of gravity later
Pipe enters cavitation air flotation concentration basin；PAM dosages are 1.5kg/tDS-2.5kg/tDS；
In cavitation air flotation concentration basin, realize that efficient uniformly molten gas, bubble sweep along mud granule in buoyancy by air supporting head
Under being driven with flow in central reaction cylinder floating upward quickly, after being slowed down by the diffuser on central reaction cylinder top, in level side
It is spread upwards to periphery, molten bladdery sludge is detached with water realization, and sludge is drained by sludge sump collection, the clear liquid after separation
Drained by the collection of adjustable effluent weir, the unsegregated sludge in part is along the circulation canal between central reaction cylinder and floatation thickening pond
Into inside central reaction cylinder, molten gas progress floatation thickening detaches again together with the sludge newly entered.
10. municipal administration domestic sludge concentration method according to claim 9, it is characterised in that：It is concentrated in cavitation air flotation
Chi Zhong, air supporting time≤1min, disengaging time≤8min, reflux ratio 10%-150%, floatation thickening sludge per ton consume per hour
Power≤50w, molten tolerance >=10mL/L.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108946989A (en) * | 2018-07-23 | 2018-12-07 | 萍乡市华星环保工程技术有限公司 | A kind of pretreatment unit being conducive to Treatment of Coking Effluent |
| CN110372058A (en) * | 2019-06-25 | 2019-10-25 | 安溪坤祁德机械科技有限公司 | A kind of molten treatment apparatus of waste water based on secondary treatment |
| CN111204953A (en) * | 2019-04-01 | 2020-05-29 | 麦王环境技术股份有限公司 | Cavitation air flotation equipment for sludge concentration and treatment process |
| CN112390507A (en) * | 2020-11-13 | 2021-02-23 | 大庆科恩特环保科技发展有限公司 | Deoiling, desanding and dewatering device and method for light oil sludge of oil field |
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| CN108946989A (en) * | 2018-07-23 | 2018-12-07 | 萍乡市华星环保工程技术有限公司 | A kind of pretreatment unit being conducive to Treatment of Coking Effluent |
| CN108946989B (en) * | 2018-07-23 | 2021-04-16 | 萍乡市华星环保工程技术有限公司 | Pretreatment device beneficial to coking wastewater treatment |
| CN111204953A (en) * | 2019-04-01 | 2020-05-29 | 麦王环境技术股份有限公司 | Cavitation air flotation equipment for sludge concentration and treatment process |
| CN110372058A (en) * | 2019-06-25 | 2019-10-25 | 安溪坤祁德机械科技有限公司 | A kind of molten treatment apparatus of waste water based on secondary treatment |
| CN112390507A (en) * | 2020-11-13 | 2021-02-23 | 大庆科恩特环保科技发展有限公司 | Deoiling, desanding and dewatering device and method for light oil sludge of oil field |
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