CN110372168A - A kind of method of river sludge resource utilization - Google Patents
A kind of method of river sludge resource utilization Download PDFInfo
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- CN110372168A CN110372168A CN201910613808.XA CN201910613808A CN110372168A CN 110372168 A CN110372168 A CN 110372168A CN 201910613808 A CN201910613808 A CN 201910613808A CN 110372168 A CN110372168 A CN 110372168A
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- sludge
- river
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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
-
- 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
- C02F11/004—Sludge detoxification
-
- 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
-
- 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
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- 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
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
- C02F11/145—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances using calcium compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Abstract
The invention discloses a kind of methods of river sludge resource utilization, which comprises the following steps: step 1: taking river sludge, is concentrated in gravity concentration tank;Step 2: flocculant is added in the sludge after concentration, flocculation aid flocculates;Step 3: the sludge after flocculation is passed through ozone and newly carries out deodorization of killing virus for sterilization to sludge;Step 4: in sludge after processing be added chelating type organic matter removal sludge in toxic heavy metal;Step 5: sludge high-drying dehydration;Step 6: sludge being burned, and lime-ash, clay, silica sand is added, soil concrete additive carries out ingredient;Step 7: the sludge after burning being subjected to the compacting of machine coagulation, is allowed to form;Step 8: secondary burning obtains sludge brick.River sludge resource utilization can be achieved in the present invention, solves the problems, such as sludge treatment, and have economic benefit, and protect environment.
Description
Technical field
The present invention relates to a kind of methods of river sludge resource utilization, belong to river water quality guarantee and recycling sludge skill
Art field.
Background technique
With the development of the society, industrial expansion, environmental protection is extremely urgent.The water head sites such as reservoir, river, lake
Substantial pollution situation occurs, pollutant enters river, make a large amount of pollutions difficult to degrade by sewage discharge, the modes such as rainwater drop leaching
Object is assembled in river sludge, so that pollution of estuary, fish are dead.Water environment pollution is mainly reflected in following several respects: first, by
It is too big to pollute water quality proportion, has seriously affected human normal life.Second, flow through the section in cities and towns, the combination area of city and country
The pollution of some irrigation canals and ditches it is universal higher, organic contamination is serious, and black and odorous water is more, and the impacted masses are more.Third, drinking water safety
Problem layer does not stop out, and water body self-purification ability is limited, and treated, and water quality is not up to national standard." water prevention and cure of pollution action plan "
It regard river sludge processing as key project, river sludge resource utilization is even more the difficulties in emphasis.Dirt in sludge
It contaminates there are mainly three types of objects, first is that the substances such as all kinds of heavy metals, including mercury, copper, zinc, cadmium.It is toxic organic in sludge second is that organic matter
Object reaches a certain concentration by enrichment, generates harm to the mankind and animals and plants.Third is that nitrogen phosphorus rich nutritive material, leads to water body
Eutrophication, it is dead so as to cause a large amount of fish.It therefore, is necessary to the resource utilization of river sludge.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of methods of river sludge resource utilization to realize river sludge resource
Change and utilizes.
To solve the above-mentioned problems, the present invention provides a kind of methods of river sludge resource utilization, which is characterized in that
The following steps are included:
Step 1: taking river sludge, be concentrated in gravity concentration tank;
Step 2: flocculant is added in the sludge after concentration, flocculation aid flocculates;
Step 3: the sludge after flocculation is passed through ozone and carries out deodorization of killing virus for sterilization to sludge;
Step 4: removing toxic heavy metal in sludge to chelating type organic matter (EDTA) is added in sludge after processing;
Step 5: sludge high-drying dehydration;
Step 6: sludge being burned, and lime-ash, clay, silica sand is added, soil additive carries out ingredient;
Step 7: the sludge after burning being subjected to the compacting of machine coagulation, is allowed to form;
Step 8: secondary burning obtains sludge brick.
Preferably, in the step 1, concentration time 12h, by moisture percentage in sewage sludge (unit mass sludge contained humidity
Quality) 96wt% is down to hereinafter, bed mud concentration is 12~27g/L after concentration.
Preferably, flocculant is ferrate in the step 2, and the mass ratio of ferrate and the sludge after concentration is
0.12~0.18:1, flocculation reaction time are 5~10min.
Preferably, flocculation aid is calcium chloride, 280~320mg/L of calcium chloride dosage in the step 2.
Preferably, in the step 4 chelating type organic matter (EDTA) additional amount be 3~5g/L, the reaction time be 15~
25min;To reach a large amount of removal toxic heavy metals such as iron, zinc, chromium etc., heavy metal is made to be stabilized use in sludge to the mankind
The harm of animals and plants.
Preferably, water content is down to 50wt% or less in high level cadre's dehydrated sludge in the step 5.
Preferably, sludge in the step 6, lime-ash, clay, silica sand mass ratio be 5:100:50:17, soil additive
For concrete additive, additional amount is that 2-4Kg concrete additive is added in sludge per ton, and concrete additive is added and makes the structure of brick more steady
It is fixed.
Preferably, incineration temperature is 1050~1075 DEG C in the step 8.
River sludge resource utilization includes three big columns: first is that pretreatment, second is that deep dehydration, third is that the money of sludge
Sourceization utilizes.Front-end processing mainly carries out conditioning modification to sludge with flocculant, carries out sterilization antivirus to sludge using ozone,
The toxic heavy metal in sludge is reduced using chelating type organic matter, so that sludge becomes harmless to humansization.Deep dehydration is then
It is that deep dehydration is carried out to sludge using high level cadre's dehydration technique and incineration technology.Recycling sludge is then using brick-baking kiln to sludge
It is burned, ingredient is added in sludge, sludge is made to become brick, to there is the utilization of recycling, on the one hand protect ring
Border, another facilitate have saved resource.This part is modified according to claim, but cannot be just the same, to be expanded.
Compared with prior art, the present invention have it is following the utility model has the advantages that
(1) harmless treatment of the achievable river sludge of the present invention;Solve sludge smell, heavy metal pollution problem, really
Safety of sludge brick during producing, selling and uying is protected.
(2) present invention achievable river sludge resource utilization solves after river sludge is by above-mentioned treatment process
Sludge treatment problem, and have economic benefit, and protect environment.
(3) present invention uses high level cadre's dehydration technique, reduces a large amount of burning heats, reduces the waste of resource.
Detailed description of the invention
Fig. 1 is process schematic representation of the invention.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
A kind of method for present embodiments providing river sludge resource utilization, as shown in Figure 1, specifically including following step
It is rapid:
(1) river sludge that channel cleanout dredging generates is placed in gravitational settling in concentration basin to be concentrated, sludge is dense after concentration
Degree is 21g/L;
(2) novel ferrate (Guangzhou Hao Feng Chemical Co., Ltd.) is added in the sludge after concentration to flocculate, is added
Amount is (the ratio between with sludge condensation amount) 0.18:1, and flocculation aid calcium chloride (general virtuous environmental protection) 280mg/L help is added and flocculates, flocculation is anti-
5min is answered, reaction is completed;
(3) it is passed through ozone 150mg/g, antivirus sterilization is carried out to sludge;
(4) chelating type organic matter (EDTA) (rich and prosperous Fine Chemical Co., Ltd, Suzhou City) is added by 3g/L to eliminate in sludge
Heavy metal reacts 20min under room temperature;
(5) sludge high-drying is dehydrated, so that sludge moisture content is reduced to 50wt%;
(6) sludge is burned, and lime-ash, clay, silica sand is added, sludge: lime-ash: clay: the mass ratio of silica sand is
3Kg concrete additive is separately added in 5:100:50:17, sludge per ton;
(7) sludge after burning is subjected to the compacting of machine coagulation, is allowed to form;
(8) secondary burning, incineration temperature are about 1000 DEG C, burn 3h, obtain sludge brick.
Embodiment 2
A kind of method for present embodiments providing river sludge resource utilization, as shown in Figure 1, specifically including following step
It is rapid:
(1) river sludge that channel cleanout dredging generates is placed in gravitational settling in concentration basin to be concentrated, sludge is dense after concentration
Degree is 27g/L;
(2) novel ferrate (Guangzhou Hao Feng Chemical Co., Ltd.) is added in the sludge after concentration to flocculate, is added
Amount is (the ratio between with sludge condensation amount) 0.12:1, and flocculation aid calcium chloride (general virtuous environmental protection) 280mg/L help is added and flocculates, flocculation is anti-
5min between seasonable, reaction are completed;
(3) it is passed through ozone 150mg/g, antivirus sterilization is carried out to sludge;
(4) chelating type organic matter (EDTA) (rich and prosperous Fine Chemical Co., Ltd, Suzhou City) is added by 4g/L to eliminate in sludge
Heavy metal reacts 25min under room temperature;
(5) sludge high-drying is dehydrated, so that sludge moisture content is reduced to 50wt%;
(9) sludge is burned, and lime-ash, clay, silica sand is added, sludge: lime-ash: clay: the mass ratio of silica sand is
3Kg concrete additive is separately added in 5:100:50:17, sludge per ton;
(6) sludge after burning is subjected to the compacting of machine coagulation, is allowed to form;
(7) secondary burning, incineration temperature are about 1055 DEG C, burn 3 hours, obtain sludge brick.
Analysis of experimental results:
In embodiment 1, sludge condensation concentration be 21g/L, but need ferrate dosage be (with sludge condensation amount it
Than) 0.18:1, final products effect, such as brick porosity is but not as good as sludge condensation concentration 27g/L in embodiment 2, ferric acid
Salt dosage is (the ratio between with sludge condensation amount) experiment effect of 0.12:1, is shown after chelating agent is added using atomic absorption method
Except metal rate is of little difference, the 80% of original heavy metal is removed, so chelating type organic matter throwing amount is about 3-5g/L, burns temperature
In comparison, the extra embodiment 1 of the brick internal voids that embodiment 2 is burnt out, water absorption rate is bigger, so firing temperature is for degree
1050-1075 DEG C is advisable.
Claims (7)
1. a kind of method of river sludge resource utilization, which comprises the following steps:
Step 1: taking river sludge, be concentrated in gravity concentration tank;
Step 2: flocculant is added in the sludge after concentration, flocculation aid flocculates;
Step 3: the sludge after flocculation is passed through ozone and carries out deodorization of killing virus for sterilization to sludge;
Step 4: in sludge after processing be added chelating type organic matter removal sludge in toxic heavy metal;
Step 5: sludge high-drying dehydration;
Step 6: sludge being burned, and lime-ash, clay, silica sand is added, soil concrete additive carries out ingredient;
Step 7: the sludge after burning being subjected to the compacting of machine coagulation, is allowed to form;
Step 8: secondary burning obtains sludge brick.
2. the method for river sludge resource utilization as described in claim 1, which is characterized in that concentration time in the step 1
For 12h, moisture percentage in sewage sludge is down to 96wt% hereinafter, bed mud concentration is 12~27g/L after concentration.
3. the method for river sludge resource utilization as described in claim 1, which is characterized in that flocculant is in the step 2
The mass ratio of sludge after ferrate, ferrate and concentration is 0.12~0.18:1, and the flocculation reaction time is 5~10min.
4. the method for river sludge resource utilization as described in claim 1, which is characterized in that flocculation aid is in the step 2
Calcium chloride, 280~320mg/L of calcium chloride dosage.
5. the method for river sludge resource utilization as described in claim 1, which is characterized in that there is chelating type in the step 4
The additional amount of machine object is 3~5g/L, and the reaction time is 15~25min.
6. the method for river sludge resource utilization as described in claim 1, which is characterized in that sludge, ash in the step 6
Slag, clay, silica sand mass ratio be 5:100:50:17, soil concrete additive be concrete additive, additional amount be sludge per ton be added
2-4Kg concrete additive.
7. the method for river sludge resource utilization as described in claim 1, which is characterized in that incineration temperature in the step 8
It is 1050~1075 DEG C.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111253177A (en) * | 2019-12-30 | 2020-06-09 | 上海方合正环境工程科技股份有限公司 | Method for preparing compound organic fertilizer by using river sludge |
CN114477673A (en) * | 2022-01-21 | 2022-05-13 | 中铁水利水电规划设计集团有限公司 | River sludge resource utilization treatment method |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111253177A (en) * | 2019-12-30 | 2020-06-09 | 上海方合正环境工程科技股份有限公司 | Method for preparing compound organic fertilizer by using river sludge |
CN114477673A (en) * | 2022-01-21 | 2022-05-13 | 中铁水利水电规划设计集团有限公司 | River sludge resource utilization treatment method |
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