CN105859068A - Sludge treatment process - Google Patents
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- CN105859068A CN105859068A CN201610247747.6A CN201610247747A CN105859068A CN 105859068 A CN105859068 A CN 105859068A CN 201610247747 A CN201610247747 A CN 201610247747A CN 105859068 A CN105859068 A CN 105859068A
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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
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Abstract
The invention belongs to the field of environmental protection and particularly relates to a sludge treatment process. The sludge treatment process comprises the following steps: (1) carrying out impurity removal: filtering garbage from sludge by using multiple stages of grilles; (2) carrying out pretreatment: carrying out pretreatment on the sludge by using three stages of sludge sedimentation tanks, so as to obtain sludge in the sludge sedimentation tank of a first stage, the sludge sedimentation tank of a second stage and the sludge sedimentation tank of a third stage, sludge slurry subjected to sedimentation by the three stages of sludge sedimentation tanks and supernatant; (3) carrying out curing treatment: carrying out dehydrating curing on the sludge in the sludge sedimentation tanks of the first, second and third stages and the sludge slurry by separately adopting mixing curing and dehydrating curing methods, so as to obtain sludge cured soil A and sludge cured soil B; (4) carrying out stacking aging: transporting the sludge cured soil A and the sludge cured soil B to a temporary stacking place, and carrying out aging for 3 to 7 days, thereby completing treatment. The sludge treatment process disclosed by the invention can be used for simultaneously treating sludge with relatively large granules, relatively high viscosity and low moisture content and sludge slurry with fine granules and high organic and moisture content and is particularly applicable to river sludge with complicated ingredients, wide granule distribution and large moisture content difference.
Description
Technical field
The invention belongs to field of Environment Protection, be specifically related to a kind of sludge treatment technique.
Background technology
Along with developing rapidly of economic construction, mankind's activity migrates frequently, and urbanization process is accelerated, and quantity of wastewater effluent is significantly increased,
Large amount of sewage directly discharges lake, then adds rainfall Surface Runoff, produce husky and produce dirt and cause river, China some areas, lake muddy water
Environmental aspect drastically deteriorates, and many river courses, alluvial face, lake are raised, and deposits extremely serious so that mud alluvial is increasingly becoming society
Property public hazards, cause a series of environment hidden danger.
At present, domestic and international sludge treatment technical method and technique mainly have natural seasoning, vacuum method, geotextile tube bag method,
Mechanical dehydration method and directly stirring concretion method etc., these methods all have some limitations, such as: natural seasoning makes silt
Mud is exposed to the sun dehydration under field conditions (factors), and its arid cycle is the longest, and decrement is inconspicuous；Vacuum method utilizes vacuum pressure to remove certainly
By water, moisture content is dehydrated difficulty after being down to 60%, and decrement is slow, and the process cycle is several weeks, several months；Geotextile tube bag method profit
Being dehydrated with mud deadweight Consolidation, dehydrating effect is the best, and decrement is slow, and long processing period reaches several months, several years；Mechanical dehydration method profit
Using mechanical pressure extrusion dehydration, moisture content can be down to about 60%, but dehydration energy is high, yield poorly.Additionally, natural drying
Method, vacuum method, geotextile tube bag method and mechanical dehydration method the most do not carry out harmless treatment to mud, there is pollution transportation
Risk.And directly stir concretion method and carry out " incremental processing " by adding additive in mud, mud is without decrement or only has few
Amount water oozes out after stirring consolidation naturally, and after process, mud moisture content is high, moulds shape in stream or soft moulds shape, it is difficult to realization is to having rapidly
The mud of gained after pest matter sealing, and process, meets cement, easily produces secondary pollution.
Additionally, different with composition according to the characteristic of mud, take both at home and abroad different firming agent and consolidation technique to mud at
Reason, mainly has three kinds of common techniques: 1. add suitable additive toward mud and firming agent carries out conditioning dehydration and solidification, so
Laggard windrow puts process, then rolls use through mechanical delamination；2. mud is placed in dewatering station, is dehydrated by heating evaporation, water
Steam condenses to obtain hot water within the condenser, is burnt by the waste gas in condenser, obtains harmless earth material；3. solidification is added toward mud
Agent carries out mix solidification, and stand postpones renewable resources and utilizes.Wherein, 1. described technique is generally adapted that clearing amount is huge, mud contains
Measure sludge treatment less, that granule is superfine, moisture content is high, content of organics is many；2. described process costs is relatively big, by
Use less；3. described technique generally is suitable for that sediment charge is many, granule compared with big, impurity is many, viscosity is big, moisture content is relatively low
Sludge treatment.It practice, the mud content in major part river course is uneven, complicated component, rubbish blends more, mud
Grain size grain uneven, wide is joined, viscosity is big, moisture content difference is big, directly uses PROCESS FOR TREATMENT mud 1. or 3., is paying height
High economic cost all can not obtain preferable treatment effect simultaneously, and the mud that water content may be made relatively low loses intrinsic potential.
Chinese patent application 201410687622.6 discloses a kind of compound sludge treatment technique, and it comprises the steps: a. remove impurity；
B. mud pretreatment, it is thus achieved that the first mud and the second mud；C. the second mud b step obtained and firming agent utilize aeration
Process mix homogeneously；Then, the second mud through Air Exposure is carried out filter pressing, processed, obtains mud cake；D. will
In the first mud that b step obtains, add firming agent and stir；E. by the mud cake obtained through step c, through d
First mud of step process is transported to interim stockyard, stands 1-2 days, completes to process.Described compound sludge treatment technique tool
There is efficient, the advantage of low cost.
Summary of the invention
It is an object of the invention to provide the sludge treatment technique that a kind of technique is simple, low cost, efficiency are high.Use institute of the present invention
The sludge treatment technique stated can process granule compared with the mud big, viscosity is big, moisture content is relatively low simultaneously, and granule is superfine, have
Machine thing and the higher mud slurry of moisture content.
The present invention is by following technical solution to be attained in that
A kind of sludge treatment technique comprises the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, the muddy water ratio of regulation mud, is subsequently placed in three
Level silt deposit pond carries out pretreatment, and described mud is after first order sedimentation tank precipitates, and mud tail water enters second level sedimentation tank
Continue precipitation, and sequentially enter third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond, through three
Mud slurry after the precipitation of level silt deposit pond and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Being stirred solidifying to obtain utilizing solidified earth from sludge A, described mix curing schedule is: mixed mud is transported to single axle helical blender
It is sufficiently stirred for firming agent；Mud slurry employing dewatering and solidifying method is carried out dehydrating and curing and obtains utilizing solidified earth from sludge B, described dehydration
Curing schedule is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, then be delivered to
Filter press carries out filter pressing, processed；The operating pressure of described Air Exposure is 0.8～1.2MPa；
Described firming agent is made up of the component of following percentage by weight meter: cement 10～15%, quick lime 10～15%, flyash
15～20%, calcium lignosulfonate 2～8%, expanded vermiculite powder 20～35%, polyaluminium chloride 2～8%, bentonite 5～10%, stone
Cotton powder 4～8%, desulfurated plaster 2～8% and sodium silicate 4～8%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 3～7 days,
Complete to process.
Wherein, the rubbish step that described step (1) uses multistage grid to filter in mud is: using gap is 50～80mm
One-level grid filter the rubbish being relatively large in diameter, re-use two grades of grids that gap is 30～50mm and filter the rubbish that diameter is less.
The present invention uses multistage grid to filter technique, can effectively remove the rubbish in mud and the most also can realize the equal of mud self
Mixed, and grid vibrating sieving machine is set on first, second and third grade of silt deposit pond, remove the rubbish in mud further, decompose and become silted up
Walk shape structure, sorts sludge granules level, ensures mud abundant homogenizing in sedimentation tank, and gravity concentration is obvious, for mud
Physics and chemistry conditioning, dehydrating and curing and composite stirring solidification offer technical guarantee, the grid gap L T.LT.LT 30mm on described grid vibrating sieving machine,
Remove the rubbish more than this diameter further.
Further, the mass ratio after firming agent is dried with mud in the solidification of described step (3) mix is (0.5～1): 10；Dehydration
Mass ratio after firming agent is dried with mud slurry in solidification is (1～3): 10.
Further, the mass ratio after firming agent is dried with mud in the solidification of described step (3) mix is 0.8: 10；Dehydration
Mass ratio after firming agent is dried with mud slurry in solidification is 1.5: 10.
Preferably, the firming agent of described step (3) is made up of the component of following percentage by weight meter: cement 10%, quick lime
12%, flyash 18%, calcium lignosulfonate 3%, expanded vermiculite powder 30%, polyaluminium chloride 4%, bentonite 8%, asbestos
Powder 5%, desulfurated plaster 4% and sodium silicate 6%.
Further, the muddy water ratio entering first order sedimentation tank mud before treatment in described step (3) is 1: (4～8).
For the mud slurry that water content is bigger, by the present invention in that and carry out deep dehydration, after Filter Press with filter press
Mud cake there is higher solid content and excellent separating effect, its detailed step is: use stage charging mode will through expose
The mud slurry of gas disposal is transported to filter press, and feed pressure is 1.0～1.2MPa, and feed time is 1～1.5h, then enters
Line space gas blowback 5～10s, extrusion dehydration 1～1.5h, squeeze pressure is 1.0～1.5MPa, again carries out air blowback 5～10s,
Discharging i.e. completes.
The present invention uses the mode of the upper mud of grab bucket or pumping that dredging silt is transported to mud storage pool, utilizes multistage grid substep to become silted up
The rubbish varied in size in mud removes, it is achieved the regeneration of rubbish；Further, the mud removing rubbish is carried out muddy water ratio
It is transported to three grades of silt deposit ponds after example regulation and carries out pretreatment, and utilize grid vibrating sieving machine to remove more tiny rubbish, respectively obtain
Mud deposit in three grades of silt deposit ponds, and suspend mud slurry and supernatant, described supernatant is transported to catchment
Pond stores, it is achieved recycle；Further, the mud deposit in three grades of silt deposit ponds is transported to single axle helical and stirs
Machine of mixing carries out mix solidification dehydration with curing materials, and the mud slurry suspended is transported in mud size-mixing tank with curing materials through exposing
Gas disposal mixes, then is transported to sheet frame dehydration filter press and carries out filter pressing and processed；Finally, the utilizing solidified earth from sludge obtained is transported to
Stack field to be aged, see the flow chart of sludge treatment technique described in accompanying drawing 1.
In firming agent of the present invention, expanded vermiculite powder is a kind of water aluminum silicon containing magnesium with porous, light weight, layer structure
Hydrochlorate, expansion multiple, between 15～40 times, has excellent absorption property and ion-exchange performance, can effectively remove mud
In harmful substance such as Organic substance, heavy metal, even some radioelement is also had certain fixation, and permissible
Absorption own wt 2～the liquid of 5 times, thus there is good water absorption and water-retaining property.Other components such as cement in firming agent,
The composition such as a flyash and quick lime part can be goed deep into, in the hole of expanded vermiculite powder, reacting with water, being completely combined by water,
The primary solidification promoting mud is shaped.Additionally, expanded vermiculite powder has heat insulating ability, when the mud stripping and slicing of preliminary sizing and solidifying is put
It is exposed to the sun under the sun, by the temperature that maintenance is higher, promotes moisture evaporation.
The effect of cement is to increase the gumminess of mud, makes mud be bonded together, and makes mud hardening.
Quick lime is mainly used for water suction, and produces amount of heat, makes mud be in a higher environment of temperature, and temperature is relatively
High being conducive to improves the chemical reaction velocity between microgranule and effect, and can also accelerate the evaporation of moisture.It is additionally operable to regulation
The acidity of mud, making environment is alkalescence.When quicklime particles is present in the hole of expanded vermiculite powder when, it can absorb
The moisture come by expanded vermiculite powder diffusion into the surface, and react generation heat, heat energy evaporation moisture around, this process
Can speed up moisture diffusion velocity in the hole of expanded vermiculite powder, be conducive to other absorbent material to absorb moisture.
Flyash includes a lot of compact grain, and its particle diameter is the least, it may occur that hydration, there is also loose structure in addition
Material.Flyash includes some metal-oxides and can react with water, therefore has water sorption.Flyash can be fine
Ground is filled in the hole of expanded vermiculite powder, and owing to there is also loose structure inside it, it can be as more short grained secondary, parasitic
Carrier.
Calcium lignosulfonate is a kind of multicomponent high molecular polymer anion surfactant, has the strongest dispersibility, bonding
Property, sequestering, the workability of concrete can be improved, inhibition of slump-loss；Utilize the caking property that it is excellent, expansion can be made up
The shortcoming that vermiculite power viscosity is poor, strengthens sludge solidification sizing, and has diminishing, strengthens, prevents the good effects such as be full of cracks.
Polyaluminium chloride is a kind of polyhydroxy, the cationic inorganic polymer flocculant of multinuclear complexation body, mainly by compression bilayer,
Absorption charge neutrality, adsorption bridging, precipitate net such as catch at the mechanism, make trickle suspended particles and colloid ion in water de-steady, poly-
Collection, flocculation, coagulation, precipitation, reach mud-water separation.
Bentonite has strong hygroscopicity and dilatancy, and the water yield of adsorbable 8～15 times of own vols, volumetric expansion is up to number
Again to 30 times；Can be dispersed into as a form of gel and suspension in aqueous medium, this medium solution has certain viscosity, thixotroping
Property and lubricity；Additionally, also have stronger cation exchange capacity (CEC) and adsorptivity, to various gases, liquid, organic substance
All have certain absorbability with heavy metal, maximal absorptive capacity is the weight of self up to 5 times；Bentonite and water, mud or fine sand
Admixture there is plasticity and cohesiveness, may advantageously facilitate the fixed-type of mud.
Flake asbestos is the general name of a kind of natural fibrous silicates mineral, net in Random Discrete in utilizing solidified earth from sludge
Shape is distributed, and crosses over the microfissure in the soil body, and tree root shape is cementing in the soil body, increases globality and the stability of the soil body, additionally,
Cement, the hydras of flyash and coagulated particles form " anchorage zone " at fiber peripheral, increase fiber adhesive aggregation in the soil body
Power and resistance to tension.
Calcium sulfate in desulfurated plaster and hydrolysis product of cement drated calcium aluminate react generation entringite, on the one hand entringite from
Body expands can fill up part hole, reduces solidified earth void content so that solidified earth intensity improves；On the other hand, when desulfurization stone
When cream volume is too much, the expansion of entringite can destroy existing jelling structure so that intensity reduces, therefore, in order to strengthen mud
The hardness of solidified earth, adds the sodium silicate hardness regulator as mud.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the sludge treatment technique that the present invention provides, efficiently solve tradition sludge treatment technique big to mud water-cut variation,
The curing environments such as complicated component, grain graininess broadness are uneven, Organic substance is complicated process the best problem, can process simultaneously granule and
Viscosity is compared with mud big, that moisture content is relatively low, and granule is tiny, Organic substance and the higher mud slurry of moisture content.
(2) present invention uses three grades of silt deposit pond pretreatment mud of series connection, can be effectively reduced the clay content of mud slurry,
Make the abundant homogenizing of mud of sedimentation tank, be conducive to isolating clay content is few, granule is superfine mud slurry and clay content is many, granule
Bigger mud, uses dehydrating and curing process that mud slurry carries out dehydrating and curing process pointedly, uses mix curing process
Mud is stirred cured, make dehydrating and curing and mix solidification prepare utilizing solidified earth from sludge be respectively provided with closely knit structure and
Higher water stability, and relatively low free swelling rate and higher carrying ratio, efficiently solve utilizing solidified earth from sludge and meet cement
The problem changed, it is to avoid pollution secondary transferring.
(3) heavy metal in mud can be consolidated in earth by sludge treatment technique that the present invention provides effectively, has relatively low
Leaching ability of heavy metal degree, process the utilizing solidified earth from sludge that obtains and reached harmless and utilize standard, reach surface water environment Group III quality mark
Standard, its effect is in existing dewatering and coagulating integral process and directly stirs consolidation technique.
Accompanying drawing explanation
Fig. 1 is the flow chart of sludge treatment technique of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, but the present invention is not limited by the record of following example
Fixed.
Embodiment 1
The sludge treatment technique of the embodiment of the present invention 1, it is characterised in that comprise the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, and the muddy water ratio of regulation mud is 1: 6, then
Being placed in three grades of silt deposit ponds and carry out pretreatment, described mud is after first order sedimentation tank precipitates, and mud tail water enters the second level
Sedimentation tank continue precipitation, and sequentially enter the third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond,
Mud slurry after three grades of silt deposit pond precipitations and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Carrying out dehydrating and curing, step is: mixed mud is transported to single axle helical blender and is sufficiently stirred for obtaining sludge solidification with firming agent
Soil A, wherein, the mass ratio after firming agent is dried with mud is 0.8: 10；Mud slurry employing dewatering and solidifying method is taken off
Water cure, step is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, aeration
The operating pressure processed is 1.0MPa, and the mass ratio after firming agent is dried with mud slurry is 1.5: 10, then uses stage
Mud slurry through Air Exposure is transported to filter press and carries out filter pressing, processed by the mode of charging, and feed pressure is
1.2MPa, feed time is 1.5h, then carries out air blowback 10s, extrusion dehydration 1.5h, and squeeze pressure is 1.5MPa,
Again carrying out air blowback 10s, discharging i.e. obtains utilizing solidified earth from sludge B；
Described firming agent is made up of the component of following percentage by weight meter: cement 10%, quick lime 12%, flyash 18%,
Calcium lignosulfonate 3%, expanded vermiculite powder 30%, polyaluminium chloride 4%, bentonite 8%, flake asbestos 5%, desulfurated plaster 4%
With sodium silicate 6%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 7 days, complete
One-tenth processes.
Embodiment 2
The sludge treatment technique of the embodiment of the present invention 2, it is characterised in that comprise the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, and the muddy water ratio of regulation mud is 1: 6, then
Being placed in three grades of silt deposit ponds and carry out pretreatment, described mud is after first order sedimentation tank precipitates, and mud tail water enters the second level
Sedimentation tank continue precipitation, and sequentially enter the third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond,
Mud slurry after three grades of silt deposit pond precipitations and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Carrying out dehydrating and curing, step is: mixed mud is transported to single axle helical blender and is sufficiently stirred for obtaining sludge solidification with firming agent
Soil A, wherein, the mass ratio after firming agent is dried with mud is 0.8: 10；Mud slurry employing dewatering and solidifying method is taken off
Water cure, step is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, aeration
The operating pressure processed is 1.0MPa, and the mass ratio after firming agent is dried with mud slurry is 1.5: 10, then uses stage
Mud slurry through Air Exposure is transported to filter press and carries out filter pressing, processed by the mode of charging, and feed pressure is
1.2MPa, feed time is 1.5h, then carries out air blowback 10s, extrusion dehydration 1.5h, and squeeze pressure is 1.5MPa,
Again carrying out air blowback 10s, discharging i.e. obtains utilizing solidified earth from sludge B；
Described firming agent is made up of the component of following percentage by weight meter: cement 15%, quick lime 10%, flyash 15%,
Calcium lignosulfonate 2%, expanded vermiculite powder 35%, polyaluminium chloride 2%, bentonite 5%, flake asbestos 6%, desulfurated plaster 2%
With sodium silicate 8%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 7 days, complete
One-tenth processes.
Embodiment 3
The sludge treatment technique of the embodiment of the present invention 3, it is characterised in that comprise the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, and the muddy water ratio of regulation mud is 1: 6, then
Being placed in three grades of silt deposit ponds and carry out pretreatment, described mud is after first order sedimentation tank precipitates, and mud tail water enters the second level
Sedimentation tank continue precipitation, and sequentially enter the third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond,
Mud slurry after three grades of silt deposit pond precipitations and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Carrying out dehydrating and curing, step is: mixed mud is transported to single axle helical blender and is sufficiently stirred for obtaining sludge solidification with firming agent
Soil A, wherein, the mass ratio after firming agent is dried with mud is 0.8: 10；Mud slurry employing dewatering and solidifying method is taken off
Water cure, step is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, aeration
The operating pressure processed is 1.0MPa, and the mass ratio after firming agent is dried with mud slurry is 1.5: 10, then uses stage
Mud slurry through Air Exposure is transported to filter press and carries out filter pressing, processed by the mode of charging, and feed pressure is
1.2MPa, feed time is 1.5h, then carries out air blowback 10s, extrusion dehydration 1.5h, and squeeze pressure is 1.5MPa,
Again carrying out air blowback 10s, discharging i.e. obtains utilizing solidified earth from sludge B；
Described firming agent is made up of the component of following percentage by weight meter: cement 12%, quick lime 15%, flyash 20%,
Calcium lignosulfonate 8%, expanded vermiculite powder 20%, polyaluminium chloride 8%, bentonite 5%, flake asbestos 4%, desulfurated plaster 4%
With sodium silicate 4%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 7 days, complete
One-tenth processes.
Embodiment 4
The sludge treatment technique of the embodiment of the present invention 4, it is characterised in that comprise the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, and the muddy water ratio of regulation mud is 1: 8, then
Being placed in three grades of silt deposit ponds and carry out pretreatment, described mud is after first order sedimentation tank precipitates, and mud tail water enters the second level
Sedimentation tank continue precipitation, and sequentially enter the third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond,
Mud slurry after three grades of silt deposit pond precipitations and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Carrying out dehydrating and curing, step is: mixed mud is transported to single axle helical blender and is sufficiently stirred for obtaining sludge solidification with firming agent
Soil A, wherein, the mass ratio after firming agent is dried with mud is 0.5: 10；Mud slurry employing dewatering and solidifying method is taken off
Water cure, step is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, aeration
The operating pressure processed is 1.2MPa, and the mass ratio after firming agent and mud slurry are dried is 1: 10, then use stage enter
Mud slurry through Air Exposure is transported to filter press and carries out filter pressing, processed by the mode of material, and feed pressure is 1.0MPa,
Feed time is 1h, then carries out air blowback 5s, extrusion dehydration 1h, and squeeze pressure is 1.0MPa, again carries out air anti-
Blowing 5s, discharging i.e. obtains utilizing solidified earth from sludge B；
Described firming agent is made up of the component of following percentage by weight meter: cement 10%, quick lime 10%, flyash 15%,
Calcium lignosulfonate 4%, expanded vermiculite powder 29%, polyaluminium chloride 2%, bentonite 10%, flake asbestos 8%, desulfurated plaster
8% and sodium silicate 4%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 7 days, complete
One-tenth processes.
Comparative example 1
The sludge treatment technique of comparative example 1 of the present invention, it is characterised in that comprise the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, and the muddy water ratio of regulation mud is 1: 6, then
Being placed in three grades of silt deposit ponds and carry out pretreatment, described mud is after first order sedimentation tank precipitates, and mud tail water enters the second level
Sedimentation tank continue precipitation, and sequentially enter the third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond,
Mud slurry after three grades of silt deposit pond precipitations and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Carrying out dehydrating and curing, step is: mixed mud is transported to single axle helical blender and is sufficiently stirred for obtaining sludge solidification with firming agent
Soil A, wherein, the mass ratio after firming agent is dried with mud is 0.8: 10；Mud slurry employing dewatering and solidifying method is taken off
Water cure, step is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, aeration
The operating pressure processed is 1.0MPa, and the mass ratio after firming agent is dried with mud slurry is 1.5: 10, then uses stage
Mud slurry through Air Exposure is transported to filter press and carries out filter pressing, processed by the mode of charging, and feed pressure is
1.2MPa, feed time is 1.5h, then carries out air blowback 10s, extrusion dehydration 1.5h, and squeeze pressure is 1.5MPa,
Again carrying out air blowback 10s, discharging i.e. obtains utilizing solidified earth from sludge B；
Described firming agent is made up of the component of following percentage by weight meter: cement 15%, quick lime 15%, flyash 20%,
Calcium lignosulfonate 8%, polyaluminium chloride 8%, bentonite 10%, flake asbestos 8%, desulfurated plaster 8% and sodium silicate 8%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 7 days, complete
One-tenth processes, and comparative example 1 is with the difference of embodiment 1, and firming agent used lacks expanded vermiculite powder.
Sludge treatment technique and existing dewatering and coagulating integral process that test example one, the present invention provide, directly stir consolidation
The effect assessment that the mud that river, Guangzhou is gushed by technique processes
1. test method: be respectively adopted the sludge treatment technique of embodiment of the present invention 1-3 and comparative example 1, dewatering and coagulating integration
Technique and the mud that directly river, Guangzhou is gushed by stirring consolidation technique process, and the utilizing solidified earth from sludge obtained after processing is carried out matter
Amount monitoring, is evaluated than (CBR) and leaching ability of heavy metal degree pH value, moisture content, free swelling rate, carrying, detection
Method uses code relevant in " highway earthwork test rule " (JTG E40-2007), and uses " solid waste Leaching
Leaching method " 7 heavy metal species dissolutions in utilizing solidified earth from sludge are measured, and by measurement result and surface water environment quality
The Monitoring lower-cut of standard compares.
2. result:
The pH value of utilizing solidified earth from sludge, moisture content, free swelling rate and carrying that the different sludge treatment technique of table 1 obtains are than (CBR)
The leaching ability of heavy metal degree of the utilizing solidified earth from sludge A of table 2 embodiment 1-3 and comparative example 1 is evaluated
The leaching ability of heavy metal degree of the utilizing solidified earth from sludge B of table 3 embodiment 1-3 and comparative example 1 is evaluated
Table 4 water environment quality standard
From upper table 1, the mud using embodiment of the present invention 1-3 sludge treatment technique to gush river, Guangzhou processes, institute
The indices of the pH value of utilizing solidified earth from sludge A and B, moisture content, free swelling rate and the CBR that obtain is good, and passes through
After sludge treatment PROCESS FOR TREATMENT of the present invention, the moisture content of mud is substantially reduced, and pH value reaches between 9-10, sludge solidification effect
Well, solving the faintly acid problem of mud, its effect is better than existing dewatering and coagulating integral process and directly stirring consolidation work
Skill, and preferable with the effect of embodiment 1 sludge treatment technique, show the firming agent using the embodiment of the present invention 1 to mud and
Mud slurry carries out the utilizing solidified earth from sludge that cured obtains and is respectively provided with preferable performance, and comparative example 1 is due to firming agent used
Lacking expanded vermiculite powder, moisture content and the free swelling rate of utilizing solidified earth from sludge A and B after process substantially increase, and carrying ratio is bright
Aobvious decline, but more existing dewatering and coagulating integral process and directly stirring consolidation technique are good, show that expanded vermiculite powder is for mud
Solidified earth forms closely knit structure and higher water stability has important effect.
From upper table 2-4, the mud using sludge treatment technique of the present invention to gush river, Guangzhou processes, can effectively by
Heavy metal in mud is enclosed in soil particle so that it is can not dissolution, formed sealing, significantly reduce utilizing solidified earth from sludge meet cement
Change, discharge heavy metal, cause secondary pollution.The effect of sludge treatment technique heavy metal of the present invention consolidation is superior to dewatering and coagulating
Integral process and directly stir consolidation technique, and with the best results of embodiment 1, and the firming agent described in comparative example 1 lacks
Expanded vermiculite powder, the consolidation effect causing heavy metal is slightly worse.The present invention processes utilizing solidified earth from sludge A and B obtained and the most reaches
Harmless utilize standard, reach surface water environment Group III quality standard.
Below it is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred implementation is not construed as the present invention
Restriction, protection scope of the present invention should be as the criterion with claim limited range.Ordinary skill for the art
For personnel, without departing from the spirit and scope of the present invention, it is also possible to make some improvements and modifications, these improvements and modifications
Also should be regarded as protection scope of the present invention.
Claims (7)
1. a sludge treatment technique, it is characterised in that comprise the following steps:
(1) remove impurity: use multistage grid to filter the rubbish in mud；
(2) pretreatment: the mud filtering rubbish toward step (1) adds water, the muddy water ratio of regulation mud, is subsequently placed in three
Level silt deposit pond carries out pretreatment, and described mud is after first order sedimentation tank precipitates, and mud tail water enters second level sedimentation tank
Continue precipitation, and sequentially enter third level sedimentation tank precipitation, obtain the mud in first, second and third grade of silt deposit pond, through three
Mud slurry after the precipitation of level silt deposit pond and supernatant；
(3) cured: by the mud mix homogeneously in first, second and third grade of silt deposit pond, uses mix curing
Being stirred solidifying to obtain utilizing solidified earth from sludge A, described mix curing schedule is: mixed mud is transported to single axle helical blender
It is sufficiently stirred for firming agent；Mud slurry employing dewatering and solidifying method is carried out dehydrating and curing and obtains utilizing solidified earth from sludge B, described dehydration
Curing schedule is: mud slurry is transported to mud size-mixing tank, is then mixed homogeneously with firming agent by Air Exposure, then be delivered to
Filter press carries out filter pressing, processed；The operating pressure of described Air Exposure is 0.8～1.2MPa；
Described firming agent is made up of the component of following percentage by weight meter: cement 10～15%, quick lime 10～15%, flyash
15～20%, calcium lignosulfonate 2～8%, expanded vermiculite powder 20～35%, polyaluminium chloride 2～8%, bentonite 5～10%, stone
Cotton powder 4～8%, desulfurated plaster 2～8% and sodium silicate 4～8%；
(4) ageing is stacked: utilizing solidified earth from sludge A, B that step (3) obtains are transported to stack field temporarily, are aged 3～7 days,
Complete to process.
Sludge treatment technique the most according to claim 1, it is characterised in that solidify in the solidification of described step (3) mix
Mass ratio after agent is dried with mud is (0.5～1): 10；Mass ratio after firming agent is dried with mud slurry in dehydrating and curing is
(1～3): 10.
Sludge treatment technique the most according to claim 2, it is characterised in that solidify in the solidification of described step (3) mix
Mass ratio after agent is dried with mud is 0.8: 10；Mass ratio after firming agent is dried with mud slurry in dehydrating and curing is 1.5: 10.
Sludge treatment technique the most according to claim 1, it is characterised in that the firming agent of described step (3) is by following
The component composition of percentage by weight meter: cement 10%, quick lime 12%, flyash 18%, calcium lignosulfonate 3%, expansion
Vermiculite power 30%, polyaluminium chloride 4%, bentonite 8%, flake asbestos 5%, desulfurated plaster 4% and sodium silicate 6%.
Sludge treatment technique the most according to claim 1, it is characterised in that enter the first order in described step (3) and sink
The muddy water ratio of pond, shallow lake mud before treatment is 1: (4～8).
Sludge treatment technique the most according to claim 1, it is characterised in that use filter press in described step (3)
Machine carries out filter pressing, the step of processed is: use the mode of stage charging that the mud slurry through Air Exposure is transported to sheet frame
Pressure filter, feed pressure is 1.0～1.2MPa, and feed time is 1～1.5h, then carries out air blowback 5～10s, extrusion dehydration
1～1.5h, squeeze pressure is 1.0～1.5MPa, again carries out air blowback 5～10s, and discharging i.e. completes.
Sludge treatment technique the most according to claim 1, it is characterised in that the first, second and third of described step (2)
Level is equipped with grid vibrating sieving machine on silt deposit pond, the grid gap L T.LT.LT 30mm on described grid vibrating sieving machine, removes big further
Rubbish in this diameter.
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| CN106478012A (en) * | 2016-09-22 | 2017-03-08 | 福建港湾岩土工程集团有限公司 | A kind of sludge curing agent and preparation method thereof |
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| CN107140925A (en) * | 2017-05-23 | 2017-09-08 | 上海市建筑科学研究院 | A kind of flocculation of sludge body consolidating agent and application |
| CN107522436A (en) * | 2017-09-15 | 2017-12-29 | 宁波天韵生物科技有限公司 | A kind of sludge curing agent and its preparation method and application method |
| CN107721103A (en) * | 2017-09-28 | 2018-02-23 | 浙江海逸环境治理技术有限公司 | A kind of polluted river channel sludge solidification processing utilizes and ecological treatment method |
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| CN109734271A (en) * | 2018-12-31 | 2019-05-10 | 广东鹏清建设集团有限公司 | A kind of river sludge processing method |
| CN110002701A (en) * | 2019-03-21 | 2019-07-12 | 中运建设控股有限公司 | Dredged bed mud soil processing method |
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| CN112456742A (en) * | 2020-11-23 | 2021-03-09 | 北京首创污泥处置技术有限公司 | Sludge treatment system and method |
| CN113024073A (en) * | 2021-03-04 | 2021-06-25 | 中建水务环保有限公司 | Method for solidifying sludge based on plate-and-frame filter press |
| CN113121155A (en) * | 2021-04-12 | 2021-07-16 | 新华盛节能科技股份有限公司 | Environment-friendly energy-saving geopolymer material taking river and lake sludge as single raw material and preparation method thereof |
| CN113582475A (en) * | 2020-04-30 | 2021-11-02 | 天津富兰克能源科技有限公司 | Sludge curing agent for municipal sewage treatment plant and curing treatment process thereof |
| CN113816572A (en) * | 2021-09-18 | 2021-12-21 | 南昌大学 | Method for quickly dehydrating and curing foundation pit sludge |
| CN115324058A (en) * | 2022-08-16 | 2022-11-11 | 中国水利水电第七工程局有限公司 | Silt curing application system for seawall backwater slope and operation method thereof |
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| CN106718275B (en) * | 2016-12-08 | 2020-05-05 | 河海大学 | Porous ecological concrete plant-growing base material and preparation method and application thereof |
| CN106718275A (en) * | 2016-12-08 | 2017-05-31 | 河海大学 | A kind of porous ecological concrete plants raw base material and its preparation method and application |
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Application publication date: 20160817 |