CN103880267B - Method for treating fresh flocculent sludge by using landfill sludge incineration residues - Google Patents
Method for treating fresh flocculent sludge by using landfill sludge incineration residues Download PDFInfo
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- CN103880267B CN103880267B CN201410070134.0A CN201410070134A CN103880267B CN 103880267 B CN103880267 B CN 103880267B CN 201410070134 A CN201410070134 A CN 201410070134A CN 103880267 B CN103880267 B CN 103880267B
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Abstract
The invention relates to a method for treating fresh flocculent sludge by using landfill sludge incineration residues. The method disclosed by the invention comprises the following steps of: firstly, incinerating landfill sludge at 800 DEG C for 3 h to prepare sludge incineration residues, and sieving through a 50-mesh sieve; and then, based on the weight of dry sludge, weighing 100-250% of sludge incineration residues, 5-9% of aluminium chloride and fresh flocculent sludge, mixing and uniformly stirring for 3-10 min, and then, carrying out suction filtration. The moisture content of the treated fresh flocculent sludge is reduced to 60%, so that the fresh flocculent sludge can meet landfill requirements. According to the invention, the concentration characteristic and the dehydration characteristic of the fresh flocculent sludge can be improved; the dehydration performance of the fresh flocculent sludge is obviously increased; a novel method is provided for resource utilization of landfill sludge; treatment of wastes with processes of wastes against one another is realized; and the purpose of recycling the landfill sludge incineration residues is realized.
Description
Technical field
The present invention relates to the method for the fresh flocculation sludge of a kind of landfill sludge incineration Slag treatment.Specifically use the mixed chlorinated aluminium of the incineration slag of landfill mud as the method for the dewatering agent of fresh flocculation sludge, belong to field of environment engineering technology.
Background technology
Along with Shanghai Urban and industrial expansion, the quantity discharged such as sanitary sewage, industrial sewage increases day by day, thus the sludge quantity produced in sewage disposal is increased day by day.Shanghai produces the domestic sludge 700 tons of 80% water ratio current every day, estimates reach 550x10 at Shanghai Urban sewage load in 2010
4m
3/ d, will produce the dehydration dewatered sludge of 40.15 ten thousand tons thereupon every year, and as added the mud of all the other municipal sludges and industry generation, the sludge quantity of Shanghai generation in future is sizable.
The main method of domestic and international process disposing sludge is sanitary landfill, agricultural sludge and sludge incineration, China mainly adopts landfill and agricultural, along with the increase of sludge quantity, each Sludge landfill disposal site in Shanghai is also tending towards saturated, and the toxic substances such as urban Heavy Metals in Sludge exceed standard and also make agricultural being restricted.So the contradiction between the rate of growth of mud and disposing capacity, therefore under minimizing, resource utilization, innoxious prerequisite, the recycling approach exploring mud has great demand.
Sludge incineration process has minimizing, stabilization, innoxious feature.Current sludge incineration slag resourcebility approach mainly contains glass-ceramic, roadbed filling and light cinder brick, and makes cement or concrete etc.But incineration slag has larger Social benefit and economic benefit as the amendment of fresh sludge.So by the reuse of landfill mud, the capacity pressure of sludge landfill both can be slowed down, also can using the amendment of its resource utilization as fresh sludge, alleviating a part of expense in sludge dewatering, is kill two birds with one stone.
Summary of the invention
A kind of method that the object of the present invention is to provide sludge incineration slag resource utilization to recycle, specifically uses the method for the fresh flocculation sludge of sludge incineration Slag treatment.
For achieving the above object, the present invention is directed to the high compressibility of fresh flocculation sludge and causing dewatering difficult problem, by the effect of landfill sludge incineration slag and aluminum chloride, realizing high-efficiency dehydration, simultaneously for the resource utilization of landfill mud proposes new outlet.
Concrete technology is as follows:
First burning and burying mud 3h at 800 DEG C, obtained sludge incineration slag, again sludge incineration slag is crossed 50 object sieve apertures, then, 50 object sludge incineration slags will be less than and aluminum chloride adds in fresh flocculation sludge, stir 3 ~ 10min, make them mix, then suction filtration, the water ratio of the fresh flocculation sludge after last check processing is 60 ~ 74%, send landfill yard landfill after reaching landfill requirement;
The undressed water ratio of above-mentioned fresh flocculation sludge is 97 ~ 99%;
The add-on of above-mentioned sludge incineration slag is 100 ~ 250% mass percents of dewatered sludge quality in fresh flocculation sludge;
Above-mentioned aluminum chloride is commercially available technical grade product, and its add-on is 5 ~ 9% mass percents of dewatered sludge quality in fresh flocculation sludge;
Described suction filtration is vacuum filtration, and suction filtration pressure is 0.092Mpa;
Described stirring 3 ~ 10min is, by detecting the capillary water absorbing time of fresh flocculation sludge, determines best churning time.
The intensity of described stirring is 300 rev/min.
The beneficial effect of patent of the present invention is as follows:
L, the high salt utilizing sludge incineration slag due to the present invention, high calcium characteristic, carry out physics and chemical conditioning in conjunction with aluminum chloride to fresh flocculation sludge, thus improve compression properties and the dehydration characteristic of fresh flocculation sludge, and its dewatering is improved significantly.
2, because the particle of sludge incineration slag of the present invention itself is hard and surface imperfection, not yielding in fresh flocculation sludge compression process, form hole, reduce the compressibility of sludge cake simultaneously, thus improve the dewatering of mud significantly.
3, because the present invention is by detecting the capillary water absorbing time of fresh flocculation sludge, determine best churning time, therefore, the present invention had both saved the working cost of stirring, achieved again the high-efficiency dehydration of fresh flocculation sludge.
4, the present invention is the recycling of landfill mud, and the treatment of wastes with processes of wastes against one another, provides new method.
Accompanying drawing explanation
The capillary water absorbing time CST of Fig. 1 fresh flocculation sludge of the present invention and the change curve of churning time
The aluminum chloride of Fig. 2 difference amount of the present invention is to the influence curve figure of the water ratio of fresh flocculation sludge
The sludge incineration slag of Fig. 3 difference amount of the present invention is to the influence curve figure of the water ratio of fresh flocculation sludge
Embodiment
Embodiment 1
Please see Figure 1,2,3.
First burning and burying mud 3h at 800 DEG C, obtains sludge incineration slag, then sludge incineration slag is crossed 50 object sieve apertures, obtain being less than 50 object sludge incineration slags.
Getting six 500ml water ratio is again that the fresh flocculation sludge sample of 98.38% is in 600ml beaker.The quality of the dewatered sludge of this fresh flocculation sludge is 1.62%.The quality of the dewatered sludge of each fresh flocculation sludge sample is 8.1 grams.Be 0-5 totally 6 by six fresh flocculation sludge sample number into spectrum, what control group (No. 0 control group being sludge incineration slag and aluminum chloride and not adding) of not adding is set.
Measure commercially available technical grade aluminum chloride and dewatered sludge mass ratio is 8.37% mass percent, be equivalent to 0.678 gram of commercially available technical grade aluminum chloride to add in 1-5 beaker.
Measure sludge incineration slag and dewatered sludge mass ratio is 0,61%, 121%, 182%, 242% mass percent, be equivalent to 4.941 grams of sludge incineration slags be added in the 2nd fresh flocculation sludge sample, 9.882 grams of sludge incineration slags are added in the 3rd fresh flocculation sludge sample, 14.823 grams of sludge incineration slags are added in the 4th fresh flocculation sludge sample, 19.764 grams of sludge incineration slags are added in the 5th fresh flocculation sludge sample, only add 8.37%(in the 2nd fresh flocculation sludge sample and be equivalent to 0.678 gram) commercially available technical grade aluminum chloride.
Then stir 5 minutes under stirring intensity is 300 rev/min, by detecting capillary water absorbing time (CST) and the churning time of this fresh flocculation sludge, as shown in Figure 1: when churning time is 5 minutes, the capillary water absorbing time (CST) of fresh flocculation sludge is 20 seconds, stirring is described 5 minutes, the centrifuge dehydration performance of fresh flocculation sludge is good.
Then vacuum filtration, suction filtration pressure is 0.092Mpa.
The final water ratio of the fresh flocculation sludge after last check processing, wherein the final water ratio of the 3rd group is 67.01%, the final water ratio of the 4th group is 63.10%, the final water ratio of the 5th group is 58.97%, final water ratio only having added the 1st group of aluminum chloride is the final water ratio of the control group that the sludge incineration slag of the 86.83%, No. 0 and aluminum chloride do not add is 89.90%.
Table one please be see.
Table one
In a word, fresh flocculation sludge is through the conditioning of aluminum chloride and sludge incineration slag, and after suction filtration, water ratio reduces greatly, water ratio is minimum is reduced to 58.97%, but too much adds aluminum chloride and sludge incineration slag, can cause the decline of rate of water loss, therefore there is one and best add scope.
Claims (4)
1. the method by the fresh flocculation sludge of landfill sludge incineration Slag treatment, it is characterized in that: first burning and burying mud 3h at 800 DEG C, obtained sludge incineration slag, then sludge incineration slag is crossed 50 object sieve apertures, then sludge incineration slag and aluminum chloride are added in fresh flocculation sludge, stir 3 ~ 10min, them are made to mix, then suction filtration, after testing, the water ratio of the fresh flocculation sludge after process is 60 ~ 74%, reaches landfill requirement;
The undressed water ratio of above-mentioned fresh flocculation sludge is 97 ~ 99%;
The add-on of above-mentioned sludge incineration slag is 100 ~ 250% mass percents of dewatered sludge quality in fresh flocculation sludge;
Above-mentioned aluminum chloride is commercially available technical grade product, and its add-on is 5 ~ 9% mass percents of dewatered sludge quality in fresh flocculation sludge.
2. the method for the fresh flocculation sludge of a kind of landfill sludge incineration Slag treatment according to claim 1, is characterized in that: described suction filtration is vacuum filtration, and suction filtration pressure is 0.092Mpa.
3. the method for the fresh flocculation sludge of a kind of landfill sludge incineration Slag treatment according to claim 1, is characterized in that: described stirring 3 ~ 10min, makes them mix and is, by detecting the capillary water absorbing time of mud, determines best churning time.
4. the method for the fresh flocculation sludge of a kind of landfill sludge incineration Slag treatment according to claim 1, is characterized in that: the intensity of described stirring is 300 rev/min.
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| CN201410070134.0A CN103880267B (en) | 2014-02-27 | 2014-02-27 | Method for treating fresh flocculent sludge by using landfill sludge incineration residues |
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| CN201410070134.0A CN103880267B (en) | 2014-02-27 | 2014-02-27 | Method for treating fresh flocculent sludge by using landfill sludge incineration residues |
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| CN103880267B true CN103880267B (en) | 2015-06-03 |
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| CN104761111B (en) * | 2015-04-14 | 2016-06-08 | 湖南大学 | A kind of method of powdered rice hulls conditioning sludge incineration slag preparation and conditioning municipal sludge thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD250920A1 (en) * | 1986-07-15 | 1987-10-28 | Inst F Pflanzen Schutzforschun | METHOD FOR THE ENVIRONMENTAL REMOVAL OF TOXIC AND POLLUTANT SAVES |
| CN101863601A (en) * | 2009-04-14 | 2010-10-20 | 株式会社安农津技研 | Flocculation curing agent, composition thereof and stabilization improvement method of silt type soil |
| CN102464420A (en) * | 2010-11-18 | 2012-05-23 | 陈学明 | Sewage physical-chemical treatment method |
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2014
- 2014-02-27 CN CN201410070134.0A patent/CN103880267B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD250920A1 (en) * | 1986-07-15 | 1987-10-28 | Inst F Pflanzen Schutzforschun | METHOD FOR THE ENVIRONMENTAL REMOVAL OF TOXIC AND POLLUTANT SAVES |
| CN101863601A (en) * | 2009-04-14 | 2010-10-20 | 株式会社安农津技研 | Flocculation curing agent, composition thereof and stabilization improvement method of silt type soil |
| CN102464420A (en) * | 2010-11-18 | 2012-05-23 | 陈学明 | Sewage physical-chemical treatment method |
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