CN109336359A - Sludge Chemical Conditioning deep dehydration method and deeply dehydrating sludge improve medicament - Google Patents
Sludge Chemical Conditioning deep dehydration method and deeply dehydrating sludge improve medicament Download PDFInfo
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- CN109336359A CN109336359A CN201811223074.6A CN201811223074A CN109336359A CN 109336359 A CN109336359 A CN 109336359A CN 201811223074 A CN201811223074 A CN 201811223074A CN 109336359 A CN109336359 A CN 109336359A
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- sludge
- deep dehydration
- zeolite
- chemical conditioning
- ferric sulfate
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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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Abstract
The invention discloses a kind of Sludge Chemical Conditioning deep dehydration methods and deeply dehydrating sludge to improve medicament.This method is selected low in cost, the chemical conditioning mode for adding convenient and fast bodied ferric sulfate and zeolite collocation carries out chemical conditioning deep dehydration to the sludge of sewage treatment plant, specifically: after the concentrated processing of sludge of sewage treatment plant, 5%~10% bodied ferric sulfate of over dry mud amount is first added, 5%~10% zeolite for adding over dry mud amount is compound conditioned to sewage plant sludge progress, adding of agent is after completion of the reaction, conditioned sludge pump excess of imports high-pressure elastomeric squeezer or diaphragm plate frame filter press are subjected to filters pressing deep dehydration, the moisture content of mud cake after filters pressing is set to be down to 60% or less.The present invention adds the depth chemical conditioning mode of zeolite using bodied ferric sulfate, can not only improve the dewatering of sludge, but also the PH of controllable sludge, and reagent cost is cheap, dosing method safe and convenient, adaptation is wide, and market scope is big.
Description
Technical field
The invention belongs to technical field of sludge deep dehydration, it is related to a kind of Sludge Chemical Conditioning deep dehydration method and sludge
Deep dehydration improves medicament.
Background technique
Municipal sewage sludge is the by-product of sewage treatment, with the continuous improvement of sewage load and discharge standard,
Sludge yield increasingly increases, and moisture percentage in sewage sludge is usually 78%~83% or so after concentration, squeezing are handled according to a conventional method, it is difficult to
Reach deep dehydration requirement of the aftertreatment device (subsequent sewage disposal system) to moisture content 55%~65%, therefore, to dirt
Waterworks sludge carries out the main trend that deep dehydration has become Treatment of Sludge.In current various deeply dehydrating sludge technologies, change
Learn conditioning deep dehydration due to simple process, dehydrating effect is good has obtained more universal application, wherein especially with " cationic
Polyacrylamide ", " ferric trichloride+lime " two kinds of sludge conditioning methods are most commonly seen, also there is a small number of use " zeolites+lime+electricity
The sludge tune of rock ballast+aluminium silicate polymer molysite " or " ferric sulfate of polymerized silica (PFSS)+polydimethyl diallyl ammonium chloride (PDADMA) "
Reason method.
The scheme for adding " cationic polyacrylamide ", special flocculation structure and its height parent due to activated sludge particles
It is aqueous, the difficult moisture sloughed such as a large amount of Interstitial Water and surface water is contained in the bulky grain wadding body formed after sludge flocculation, it is dirty
Moisture content of the cake is still higher after filtration for mud.In addition, cationic-type polyacrylamide is difficult to degrade under field conditions (factors), degradation
Generated acrylamide monomer is also the extremely toxic substance with neurotoxicity, and in cationic-type polyacrylamide synthesis process
Used in the organic solvents such as exhibiting high surface activating agent also can cause environmental pollution.
And the scheme of " ferric trichloride+lime " or " zeolite+lime+carbide slag+aluminium silicate polymer molysite " is added, due to adding
Medicament in contain a large amount of lime, be added lime generate highly basic Ca (OH) 2, it is big to the pH value knots modification of sludge, be in originally
Neutral sludge will become the sludge of strong basicity, and the purposes of sludge is limited, it is impossible to be used in compost, land use and gardens
The purposes such as greening.
In addition, adding the scheme of " zeolite+lime+carbide slag+aluminium silicate polymer molysite ", there is also following defects: (1) poly- silicon
The stability of sour alite is poor, can autohemagglutination form water-soluble poor silicic acid gel polymer, must using preceding scene immediately
Prepare, thus adding of agent get up it is inconvenient quick also dangerous；(2) aluminium silicate polymer molysite is by ferric sulfate, aluminum sulfate and silicic acid
Sodium is made, and higher cost is made in medicament, and market scope is smaller.
And the scheme of " ferric sulfate of polymerized silica (PFSS)+polydimethyl diallyl ammonium chloride (PDADMA) " is added, due to it
Used in PDADMA cost it is very high, shared specific gravity is very big, therefore the reagent cost is higher, and market scope is smaller.
Summary of the invention
It is wanted it is an object of the present invention to overcome the deficiencies of the prior art and provide a kind of deep dehydration for being both able to satisfy sludge
It asks, and can control the pH value of sludge, and reagent cost is cheap, the Sludge Chemical Conditioning deep dehydration side of dosing method safe and convenient
Method and deeply dehydrating sludge improve medicament.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of Sludge Chemical Conditioning deep dehydration method of the present invention is as follows: after the concentrated processing of sewage plant sludge, first by exhausted
The 5%~10% of dewatered sludge amount adds bodied ferric sulfate (SPFS), then carries out by 5%~10% Zeolite Addition of over dry sludge quantity
Compound conditioned, conditioned sludge is squeezed into sludge press filtration equipment (superelevation compression elasticity after completion of the reaction, with pump by two kinds of adding of agent
Squeezer or diaphragm plate frame filter press) in carry out filters pressing deep dehydration, so that the moisture content of mud cake after filters pressing is down to 60% or less.
A kind of Sludge Chemical Conditioning deep dehydration method of the present invention, specifically sequentially includes the following steps:
(1) by sewage plant sludge (i.e. from secondary sedimentation tank of sewage treatment work come out sludge) by delivery pump squeeze into thickener into
Row concentration；
(2) sludge after previous step concentration is squeezed into sludge flashing reactor by delivery pump, first presses over dry sludge
The 5%~10% of amount adds bodied ferric sulfate (SPFS), stirs and evenly mixs, then presses 5%~10% Zeolite Addition of over dry sludge quantity,
It stirs and evenly mixs, sewage plant sludge is carried out compound conditioned；
(3) conditioned sludge is squeezed into sludge press filtration equipment (superelevation by squeezing feed pump (screw pump or plunger pump)
Compression elasticity squeezer or diaphragm plate frame filter press) in carry out the processing of filters pressing deep dehydration, be down to the moisture content of mud cake after filters pressing
60% or less.
Further, the above method further includes step (4): the mud cake after filters pressing is carried out by the outward transport of mud cake conveying equipment
Disposition；Filtrate after filters pressing is pumped into subsequent sewage disposal system by conveying and carries out subsequent processing.
Further, in the step (1), polyacrylamide (PAM) is added by the 0.1%~0.6% of over dry sludge quantity,
Concentration is carried out to sludge.
Further, in the step (1), the moisture content of sewage plant sludge is 98~99.9%, sludge after concentration
Moisture content be 93%~98%.
Further, the step (2) it is compound conditioned in, 5%~10% polyaluminum sulfate of over dry mud amount is first added
Iron (SPFS) is stirred and evenly mixed under 10~20 revs/min of revolving speeds with blender, and continuing mixing time is 5~10 minutes, is destroyed dirty
Biologic grain inside mud wadding body and wadding body；5%~10% zeolite (100-300 mesh) for adding over dry mud amount, with stirring
Machine stirs and evenly mixs under 10~20 revs/min of revolving speeds, and continuing mixing time is 5~10 minutes, adds zeolite as a result, with this molysite
Chemical conditioning mode improve the dewatering of sludge.
Further, the zeolite is the zeolite of 100-300 mesh.
Further, in the step (3), feed pressure >=0.6MPa of sludge press filtration equipment, squeeze pressure >=
1.5MPa；The feed time of sludge is 30~90 minutes, and the squeezing time is 20~60 minutes.
Further, in the step (3), the moisture content of mud cake is down to 60% or less after filters pressing.
Superelevation compression elasticity squeezer and diaphragm plate frame filter press can arbitrarily select satisfactory equipment brand, meet charging
Pressure >=0.6MPa, squeeze pressure >=1.5MPa.Wherein, the feed time of sludge be 30~90 minutes, squeezing the time be
20~60 minutes, 60% or less can be down to the moisture content of mud cake after the completion of step realization filters pressing.
Sewage plant sludge is also municipal sludge, or is excess sludge, and moisture content is generally between 98.0-99.9%.Through
Deep dehydration processing is carried out by above-mentioned Sludge Chemical Conditioning deep dehydration method, the moisture content of mud cake can drop to after the completion of filters pressing
60% or less.
Deeply dehydrating sludge chemical conditioning medicament used in Sludge Chemical Conditioning deep dehydration method of the present invention,
Including both conditioning medicaments of bodied ferric sulfate (molysite) and zeolite (100-300 mesh), wherein bodied ferric sulfate (molysite) adds
Amount is the 5%~10% of over dry sludge quantity, and zeolite (100-300 mesh) dosage is the 5%~10% of over dry sludge quantity.
It is preferably low in cost in the present invention, add convenient and fast bodied ferric sulfate SPFS (molysite) and zeolite and arrange in pairs or groups, provide
The co-conditioning method of a kind of " bodied ferric sulfate SPFS+ zeolite ", had both met the deep dehydration performance requirement of sludge, had also met
The few demand of the pH value knots modification of sludge, the sludge after making conditioning are in neutrality.
Improve the action principle of medicament:
Influence the retentiveness and filters pressing that sludge factor of water separation capability in filters pressing deep dehydration is mainly sludge itself
The property of the resistance filtering layer formed in journey.The former depend primarily on extracellular polymeric in sludge and flocculant ingredient formed it is hydrophilic
The amount and property of substance, the latter depend on the property of mud granule.
Bodied ferric sulfate (SPFS) is a kind of inorganic polymer flocculant, and superior performance, processing cost is cheap, it can break
Biologic grain inside bad sludge wadding body and wadding body destroys the extracellular polymeric in sludge, produces a large amount of pore structures, makes big
The Free water and combination water of amount are converted into interstitial water, reduce the retentiveness of sludge.
Zeolite is a kind of aluminium silicate mineral containing water rack-like structure, is a kind of porous material, has absorption property, it
The more empty latticed skeletons of sludge can be supplied, change the grain structure of sludge, the deformation for preventing sludge filter cake from being depressed provides
Water passage discharges moisture sufficiently, improves the dewatering of sludge.
Sludge Chemical Conditioning deep dehydration method of the invention adds two kinds of medicines of molysite (bodied ferric sulfate SPFS) and zeolite
Agent, reagent cost is cheap, can overcome the shortcomings of that molysite adds the sludge of lime in alkalinity, control the pH value of sludge.
Beneficial effects of the present invention:
1. to solve the deficiencies in the prior art, the present invention provides it is a kind of it is low in cost, add convenient and fast bodied ferric sulfate
With the deeply dehydrating sludge conditioning pharmaceutical agent combinations and deep dehydration method for sludge of zeolite collocation, low cost may be implemented, pH value changes
Variable is few.The mechanism of action that bodied ferric sulfate and zeolite are arranged in pairs or groups in the present invention is as follows: bodied ferric sulfate is acted on broken by charge neutrality
The colloidal dispersion of bad sludge, by adsorbing, building bridge the effects of, make micelle reunite with sinking, and make a large amount of Free water and water is combined to convert
As interstitial water；And the reticular structure of zeolite provides water passage, discharges a large amount of interstitial water sufficiently, and it is aqueous to reduce sludge
Rate improves dewatering performance of sludge.
The deeply dehydrating sludge chemical conditioning pharmaceutical agent combinations and sludge of " bodied ferric sulfate SPFS+ zeolite " provided by the invention
Deep dehydration method, had not only been able to satisfy the deep dehydration requirement (moisture percentage in sewage sludge can be dropped to 60% or less) of sludge, but also can control
Sludge pH value (sludge before adding medicament be it is neutral, added during the sludge after both medicaments is still now
Property), and the cheap (cost of two kinds of medicaments: SPFS unit price: 1000-1500 yuan/ton of reagent cost；Zeolitic monovalent: 200-500
Yuan/ton), dosing method safe and convenient (is added directly, prepare immediately without using preceding scene), and market scope is big.
Compared with existing several sludge conditioning technologies, cost and market scope are compared as follows the present invention:
(1) the sludge conditioning scheme of " molysite (bodied ferric sulfate SPFS)+zeolite " of the invention:
1. SPFS is made of a kind of ingredient of ferrous sulfate, the reagent cost is cheap, and market scope is big.
2. cost: SPFS unit price: 1000-1500 yuan/ton；Zeolitic monovalent: 200-500 yuan/ton.
3. medicament advantage: SPFS is cheap, can destroy the biologic grain inside sludge wadding body and wadding body, generates pore structure,
Reduce the retentiveness of sludge.Zeolite, it is cheap and easy to get, skeleton and water passage can be provided, the dewatering of sludge is improved.Overall medicine
Agent is low in cost, and adaptation is wide, and market scope is big.
(2) sludge conditioning of existing " ferric sulfate of polymerized silica (PFSS)+polydimethyl diallyl ammonium chloride (PDADMA) "
Scheme:
1. PFSS is synthesized by polysilicon acid and ferric sulfate, at high cost one of cost than bodied ferric sulfate SPFS of the medicament
A bit, market scope is relatively smaller.
2. cost: PFSS unit price: 1200-1700 yuan/ton；PDADMA unit price: 10000-20000 yuan/ton.
3. medicament disadvantage: PDADMA cost is very high, PFSS higher cost.Overall reagent cost is high, and market scope is small.
(3) the sludge conditioning scheme of existing " zeolite+lime+carbide slag+aluminium silicate polymer molysite ":
1. aluminium silicate polymer molysite is synthesized by ferric sulfate, aluminum sulfate and sodium metasilicate, the cost of the medicament compares polyaluminum sulfate
The cost of iron SPFS and ferric sulfate of polymerized silica PFSS are much higher, and market scope does not have bodied ferric sulfate SPFS and ferric sulfate of polymerized silica
PFSS is big.
2. cost (including medicament stock purchase cost+medicament stock composite cost):
Cost of material: aluminium silicate polymer molysite: 2000-2500/ tons, zeolite: 200-500/ tons.
3. medicament disadvantage: 1) stability of aluminium silicate polymer molysite is poor, can autohemagglutination form water-soluble poor silicic acid gel
Polymer must be prepared immediately using preceding scene, and adding of agent is inconvenient quick.2) pH value knots modification of the feeding lime to sludge
Greatly, the sludge being in neutrality originally will become the sludge of strong basicity, and the purposes of sludge is limited, it is impossible to be used in compost, soil
Using with the purposes such as afforestation.
To sum up, the present invention has the advantage that compared with existing sludge conditioning technology
1, the cost of both medicaments of bodied ferric sulfate SPFS and zeolite is the cheapest, and composition is simple, dosing method safety
It is convenient, on the basis of meeting deeply dehydrating sludge requirement, it can control sludge pH value, can be used in compost, land use and garden
The multiple uses such as woods greening.
2, sludge conditioning method adaptive surface of the invention is extensive, sets in medicament selection and combination and its corresponding deep dehydration
Under standby cooperation, according to the conditioning reagent combination, the moisture percentage in sewage sludge of sewage treatment plant can be dropped to 60% hereinafter, meeting not
With the dehydration requirement of municipal wastewater treatment plant.It is suitble to the upgrading of existing deep sludge dewatering process simultaneously, and technological transformation is at low cost.
3, deep dehydration method for sludge of the invention, medicament form simple, low in cost, dosing method safe and convenient, warp
Feasibility of helping is high, and efficiency of sludge treatment is high, and the case where without the secondary pollutions such as the discharge of high concentration pressing filtering liquid and stench, environment influences
It is small.
Detailed description of the invention
Fig. 1 is a kind of process flow chart of Sludge Chemical Conditioning deep dehydration method of the present invention.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is further illustrated.
Embodiment 1
As shown in Figure 1, a kind of Sludge Chemical Conditioning deep dehydration method of the present invention, sequentially includes the following steps:
(1) sewage plant sludge (sludge come out from secondary sedimentation tank of sewage treatment work) is squeezed into thickener by delivery pump,
Polyacrylamide (PAM) is added by the 0.6% of over dry sludge quantity, concentration is carried out to sludge；
Wherein, the moisture content of sewage plant sludge is 99.9%；After concentration, the moisture content of sludge is 98%, sludge
Capillary water absorbing time CST value is 327.3s.
(2) sludge after previous step concentration is squeezed into sludge flashing reactor by delivery pump, first presses over dry sludge
Amount 10% adds bodied ferric sulfate (SPFS), then by over dry mud amount 10% Zeolite Addition (100 mesh) to sewage plant sludge into
Row is compound conditioned；
(3) conditioned sludge is squeezed into sludge press filtration equipment (superelevation compression elasticity pressure by squeezing feed pump (screw pump)
Crusher) in carry out the processing of filters pressing deep dehydration；Feed pressure >=0.6MPa of superelevation compression elasticity squeezer, squeeze pressure >=
1.5MPa；The feed time of sludge is 30 minutes, and the squeezing time is 20 minutes, and the moisture content of mud cake is down to 60% after the completion of filters pressing
Below (for 59.4%), the capillary water absorbing time CST value of mud cake is 92.3S.
(4) mud cake after filters pressing is disposed by the outward transport of mud cake conveying equipment；Filtrate after filters pressing is passed through into conveying
It is pumped into subsequent sewage disposal system and carries out subsequent processing.
Deeply dehydrating sludge used in the Sludge Chemical Conditioning deep dehydration method of the present embodiment improves medicament, including nothing
Two kinds of machine macromolecule flocculant poly ferric sulfate SPFS (molysite) and zeolite (100 mesh), wherein bodied ferric sulfate SPFS dosage
It is the 10% of over dry sludge quantity, zeolite dosage is the 10% of over dry sludge quantity.
The deeply dehydrating sludge chemical conditioning pharmaceutical agent combinations and sludge deep of " bodied ferric sulfate SPFS+ zeolite " of the invention
Dewatering, had not only been able to satisfy the deep dehydration requirement (moisture percentage in sewage sludge can be dropped to 60% or less) of sludge, but also can control sludge
PH value (sludge before adding medicament be it is neutral, it is still neutral for having added the sludge after both medicaments now
), and (the SPFS cost: 1000-1500 yuan/ton X10%=100-150 yuan/ton low in cost of two kinds of medicaments；Zeolite cost:
200-500 yuan/ton X10%=20-50 yuan/ton), dosing method safe and convenient (is added directly, without instant using preceding scene
Prepare), adaptation is wide, and market scope is big.
Embodiment 2
As shown in Figure 1, a kind of Sludge Chemical Conditioning deep dehydration method of the present invention, sequentially includes the following steps:
(1) sewage plant sludge (sludge come out from secondary sedimentation tank of sewage treatment work) is squeezed into thickener by delivery pump,
Polyacrylamide (PAM) is added by the 0.1% of over dry sludge quantity, concentration is carried out to sludge；
Wherein, the moisture content of sewage plant sludge is 98%；The moisture content of sludge is 93% after concentration, the capillary of sludge
Absorbent time CST value is 301.5s.
(2) sludge after previous step concentration is squeezed into sludge flashing reactor by delivery pump, first presses over dry sludge
The 5% of amount adds bodied ferric sulfate (SPFS), then carries out by 5% Zeolite Addition (300 mesh) of over dry mud amount to sewage plant sludge
It is compound conditioned.
(3) conditioned sludge is squeezed into (the diaphragm plate frame filters pressing of sludge press filtration equipment by squeezing feed pump (plunger pump)
Machine) in carry out the processing of filters pressing deep dehydration；Feed pressure >=0.6MPa, the squeeze pressure >=1.5MPa of diaphragm plate frame filter press；
The feed time of sludge is 90 minutes, and the squeezing time is 60 minutes, after the completion of filters pressing the moisture content of mud cake be down to 60% or less (for
57.8%), the capillary water absorbing time CST value of mud cake is 89.6S.
(4) mud cake after filters pressing is disposed by the outward transport of mud cake conveying equipment；Filtrate after filters pressing is passed through into conveying
It is pumped into subsequent sewage disposal system and carries out subsequent processing.
Deeply dehydrating sludge used in the Sludge Chemical Conditioning deep dehydration method of the present embodiment improves medicament, including nothing
Two kinds of machine macromolecule flocculant poly ferric sulfate SPFS (molysite) and zeolite (300 mesh), wherein bodied ferric sulfate SPFS dosage
It is the 5% of over dry sludge quantity, zeolite dosage is the 5% of over dry sludge quantity.
The deeply dehydrating sludge chemical conditioning pharmaceutical agent combinations and sludge deep of " bodied ferric sulfate SPFS+ zeolite " of the invention
Dewatering, had not only been able to satisfy the deep dehydration requirement (moisture percentage in sewage sludge can be dropped to 60% or less) of sludge, but also can control sludge
PH value (sludge before adding medicament be it is neutral, it is still neutral for having added the sludge after both medicaments now
), and (the SPFS cost: 1000-1500 yuan/ton X5%=50-75 yuan/ton low in cost of two kinds of medicaments；Zeolite cost:
200-500 yuan/ton X5%=10-25 yuan/ton), dosing method safe and convenient (is added directly, without instant using preceding scene
Prepare), adaptation is wide, and market scope is big.
Embodiment 3
As shown in Figure 1, a kind of Sludge Chemical Conditioning deep dehydration method of the present invention, sequentially includes the following steps:
(1) sewage plant sludge (sludge come out from secondary sedimentation tank of sewage treatment work) is squeezed into thickener by delivery pump,
Polyacrylamide (PAM) is added by the 0.3% of over dry sludge quantity, concentration is carried out to sludge；
Wherein, the moisture content of sewage plant sludge is 99%；The moisture content of sludge is 95% after concentration, the capillary of sludge
Absorbent time CST value is 316.2s；
(2) sludge after previous step concentration is squeezed into sludge flashing reactor by delivery pump, first presses over dry sludge
The 8% of amount adds bodied ferric sulfate (SPFS), then carries out by 8% Zeolite Addition (200 mesh) of over dry mud amount to sewage plant sludge
It is compound conditioned；
(3) conditioned sludge is squeezed into sludge press filtration equipment (superelevation by squeezing feed pump (screw pump or plunger pump)
Compression elasticity squeezer) in carry out the processing of filters pressing deep dehydration；Feed pressure >=0.6MPa of superelevation compression elasticity squeezer, squeezing pressure
Power >=1.5MPa；The feed time of sludge is 60 minutes, and the squeezing time is 40 minutes, can a step realize mud cake after the completion of filters pressing
Moisture content is down to 60% or less (for 59.1%), and the capillary water absorbing time CST value of mud cake is 91.2S.
(4) mud cake after filters pressing is disposed by the outward transport of mud cake conveying equipment；Filtrate after filters pressing is passed through into conveying
It is pumped into subsequent sewage disposal system and carries out subsequent processing.
Deeply dehydrating sludge used in the Sludge Chemical Conditioning deep dehydration method of the present embodiment improves medicament, including nothing
Two kinds of machine macromolecule flocculant poly ferric sulfate SPFS (molysite) and zeolite (200 mesh), wherein bodied ferric sulfate SPFS dosage
It is the 8% of over dry sludge quantity, zeolite dosage is the 8% of over dry sludge quantity.
The deeply dehydrating sludge chemical conditioning pharmaceutical agent combinations and sludge deep of " bodied ferric sulfate SPFS+ zeolite " of the invention
Dewatering, had not only been able to satisfy the deep dehydration requirement (moisture percentage in sewage sludge can be dropped to 60% or less) of sludge, but also can control sludge
PH value (sludge before adding medicament be it is neutral, it is still neutral for having added the sludge after both medicaments now
), and (the SPFS cost: 1000-1500 yuan/ton X8%=80-120 yuan/ton low in cost of two kinds of medicaments；Zeolite cost:
200-500 yuan/ton X8%=16-40 yuan/ton), dosing method safe and convenient (is added directly, without instant using preceding scene
Prepare), adaptation is wide, and market scope is big.
Claims (10)
1. a kind of Sludge Chemical Conditioning deep dehydration method, which is characterized in that after the concentrated processing of sewage plant sludge, first press over dry
The 5%~10% of sludge quantity adds bodied ferric sulfate, then carries out compounding tune by 5%~10% Zeolite Addition of over dry sludge quantity
Conditioned sludge after completion of the reaction, is squeezed into sludge press filtration equipment with pump and carries out filters pressing depth and take off by reason, two kinds of adding of agent
Water makes the moisture content of mud cake after filters pressing be down to 60% or less.
2. Sludge Chemical Conditioning deep dehydration method as described in claim 1, which is characterized in that sequentially include the following steps:
It (1) is the sludge come out from secondary sedimentation tank of sewage treatment work by sewage plant sludge, it is dense to squeeze into thickener progress by delivery pump
Contracting processing；
(2) sludge after previous step concentration is squeezed into sludge flashing reactor by delivery pump, first by over dry sludge quantity
5%~10% adds bodied ferric sulfate, stirs and evenly mixs, then presses 5%~10% Zeolite Addition of over dry sludge quantity, stirs and evenly mixs,
Sewage plant sludge is carried out compound conditioned；
(3) sludge after will be compound conditioned by screw pump or plunger pump squeeze into sludge press filtration equipment superelevation compression elasticity squeezer or
The processing of filters pressing deep dehydration is carried out in diaphragm plate frame filter press, and the moisture content of mud cake after filters pressing is made to be down to 60% or less.
3. Sludge Chemical Conditioning deep dehydration method as claimed in claim 2, which is characterized in that the above method further includes step
(4): the mud cake after filters pressing is disposed by the outward transport of mud cake conveying equipment；After filtrate after filters pressing is pumped by conveying
Continuous sewage disposal system carries out subsequent processing.
4. Sludge Chemical Conditioning deep dehydration method as claimed in claim 2, which is characterized in that in the step (1), by exhausted
The 0.1%~0.6% of dewatered sludge amount adds polyacrylamide PAM, carries out concentration to sludge.
5. Sludge Chemical Conditioning deep dehydration method as claimed in claim 2, which is characterized in that in the step (1), sewage
The moisture content of factory's sludge is 98%~99.9%, and the moisture content of sludge is 93%~98% after concentration.
6. Sludge Chemical Conditioning deep dehydration method as claimed in claim 2, which is characterized in that in the step (2), first plus
5%~10% bodied ferric sulfate for entering over dry mud amount is stirred and evenly mixed under 10~20 revs/min of revolving speeds with blender, is continued
Mixing time is 5~10 minutes, adds 5%~10% zeolite of over dry mud amount, is turned with blender at 10~20 revs/min
It is stirred and evenly mixed under speed, continuing mixing time is 5~10 minutes,.
7. the Sludge Chemical Conditioning deep dehydration method as described in claim 1,2 or 6, which is characterized in that the zeolite is
The zeolite of 100-300 mesh.
8. Sludge Chemical Conditioning deep dehydration method as claimed in claim 2, which is characterized in that in the step (3), sludge
Feed pressure >=0.6MPa, the squeeze pressure >=1.5MPa of filtering equipment；The feed time of sludge is 30~90 minutes, when squeezing
Between be 20~60 minutes.
9. Sludge Chemical Conditioning deep dehydration method as claimed in claim 2, which is characterized in that in the step (3), filters pressing
The moisture content of mud cake is down to 60% or less afterwards.
10. deeply dehydrating sludge used in a kind of Sludge Chemical Conditioning deep dehydration method as claimed in claim 7 improves
Medicament, which is characterized in that the medicament includes both conditioning medicaments of the zeolite of bodied ferric sulfate and 100-300 mesh, wherein polymerization
The dosage of ferric sulfate is that the dosage of the zeolite of 5%~10%, the 100-300 mesh of over dry sludge quantity is over dry sludge quantity
5%~10%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111620539A (en) * | 2020-06-11 | 2020-09-04 | 昆明滇池水务股份有限公司 | Deep dehydration tempering method for sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111646670A (en) * | 2020-05-19 | 2020-09-11 | 上海凌逍环保科技有限公司 | Multistage dehydration method and device |
| CN111620539A (en) * | 2020-06-11 | 2020-09-04 | 昆明滇池水务股份有限公司 | Deep dehydration tempering method for sludge |
| CN113998863A (en) * | 2021-11-27 | 2022-02-01 | 深圳市深水水务咨询有限公司 | Deep dehydration treatment method for sludge |
| CN114716119A (en) * | 2022-02-28 | 2022-07-08 | 中国地质大学（武汉） | Coupling treatment method for bottom sediment conditioning and pollutant resistance control |
| CN114873895A (en) * | 2022-05-18 | 2022-08-09 | 上海申耀环保工程有限公司 | Water works mud sediment decrement and resourceful treatment system |
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