CN103553293A - Deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue - Google Patents
Deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue Download PDFInfo
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- CN103553293A CN103553293A CN201310548740.4A CN201310548740A CN103553293A CN 103553293 A CN103553293 A CN 103553293A CN 201310548740 A CN201310548740 A CN 201310548740A CN 103553293 A CN103553293 A CN 103553293A
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Abstract
The invention discloses a deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue. The method comprises two steps of chemical conditioning and modifying: adding water into fresh sludge to be dehydrated into sludge with moisture content of 80%-85%, conditioning into sludge with moisture content of 90%-93%, adding landfill stabilized sludge incineration residue 10%-30% the weight of the sludge, mixing uniformly; mechanical squeezing and deep dehydrating: pumping the conditioned sludge into a plate-and-frame filter press, deep dehydrating for 1 hour under the pressure of 1MPa. The method has the advantages that due to the utilization of the landfill stabilized sludge incineration residue, the capillary water absorption time of the sludge can be obviously shortened, and the dehydration performance of the sludge can be sharply improved; after filter pressing and dehydrating, the moisture content of the sludge is reduced to be less than 60%; the waste is used for processing waste, the dehydration performance of fresh sludge can be greatly improved, and the landfill stabilized sludge is excavated and recycled.
Description
Technical field
The invention belongs to sludge treatment and dispose and resource technology field, relate to a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge.
Background technology
At present, the main method that China's sludge treatment is disposed has compost, sanitary landfill, burning and soil utilization etc.Wherein, mud sanitary landfill, because having the features such as short, reduced investment of construction period, convenient management, operation be simple, becomes a kind of method that China's sludge disposal the most generally adopts.Yet, continuous increase along with wastewater treatment in China factory sewage load, sludge yield constantly increases, make city landfill land used growing tension, for guaranteeing Sludge landfill Sustainable development, the shared land used of landfill mud inevitably need to soar, as follow-up landfill land used or other planned land uses, therefore, the mud of landfill is excavated to utilize will become the inevitable choice that following sludge treatment is disposed.
On the other hand, the water ratio of sludge from wastewater treatment plant is high, after simple concentrated centrifugal dehydration treatment, water ratio is still up to 80%-85%, and being carried out to further landfill, burning or soil utilization etc., mud processes disposal, all be strict with water ratio and drop to 60% and following, therefore need to carry out further deep dehydration processing to mud.At present, the method that deeply dehydrating sludge generally adopts is to improve dewatering performance of sludge by adding dewatering agent, and then process maintenance or mechanical effect reach the object of deep dehydration.Yet, existing inorganic or organic dewatering agent, all more or less there is the large or high in cost of production problem of consumption.Therefore, the sludge dehydrating agent of searching Cheap highly effective is a great problem of deeply dehydrating sludge.
Given this, patent of the present invention considers that landfill mud is after several years landfill is disposed, and organism natural degradation is wherein relatively stable at the inorganic dewatering agent of sludge dewatering stage interpolation, therefore can be used as fresh sludge amendment, re-uses.And, by being carried out after burning disposal, can activate inorganic dewatering agent wherein, make its dehydrating and curing effect better.Therefore, patent of the present invention is reused for Landfill Stabilization Rate sludge incineration residue the curing conditioning of fresh sludge, and the treatment of wastes with processes of wastes against one another, when improving fresh sludge dewatering, realizes the recycling of excavation Landfill Stabilization Rate mud, kills two birds with one stone.
Aspect Patents research, do not retrieve at present Patents and landfill stabilization mud is exploited to utilize study, only there is a few patents, the research that utilizes solidification sludge incineration residue to improve dewatering performance of sludge is disclosed.
As adding leather-making mud bottom ash to improve to disclose a kind of leather-making mud bottom ash that utilizes in the method > > (publication number CN102923928A) of dewatering performance of sludge, mono-kind of Chinese document patent < < improves leather-making mud dewatering, and then add cationic polyacrylamide flocculant agent and further nurse one's health, finally adopt vacuum filtration to realize the effectively method of dehydration of mud.The method can obviously reduce the consumption of flocculation agent, and treatment effect is good, but research only limits to the leather-making mud of the not predrainage of water ratio 98% left and right, and range of application is little.
In China's document patent < < sludge solidifying agent for the treatment of sludge from wastewater treatment plant and method for sludge treatment > > (publication number CN102267796A) thereof, a kind of sludge incineration bottom ash that is 40%-60% by mass percent is disclosed, mass percent is the dewatering agent that the lime of 20%-40% and magnesium chloride that mass percent is 10%-20% combine, wherein, lime is unslaked lime, sludge incineration bottom ash is municipal sewage sludge anhydration and incineration bottom ash, magnesium chloride is technical grade Magnesium Chloride Anhydrous.The processing treatment process of this patented invention is that in sludge agitation device, to add water ratio 95%-97% sewage plant sludge and described water ratio 95%-97% sewage plant sludge weight in wet base mass percent be the sludge solidifying agent described in 5%-10%, then carry out mix and blend, churning time should be no less than 10 minutes, after stirring finishes, in die for molding, after the demoulding, under room temperature, after maintenance 1-7 days, carry out landfill or as landfill yard casingmaterial.The sludge incineration bottom ash relating to is the residue after primary sludge drying dehydration.
In sum, the present invention's combination excavation of landfill mud utilizes demand and sludge from wastewater treatment plant deep dehydration to process a difficult problem, angle from the treatment of wastes with processes of wastes against one another, utilize the inorganic dewatering agent content of Landfill Stabilization Rate mud high, and after burning disposal, character activation, the characteristics such as short texture, use it for curing fresh sludge, and in conjunction with plate-and-frame filter press press dewatering to reach the object of deeply dehydrating sludge, realize exploitation and the recycling of landfill mud, circulationization is utilized soil simultaneously.
Summary of the invention
Object of the present invention, exactly for existing landfill mud exploitation utilize a difficult problem and existing sludge dehydrating agent cost high, the difficult problems such as cost performance is low, deep dehydration difficult treatment, utilize in landfill stabilization mud residual inorganic dewatering agent content high, and after burning disposal, character activation, the features such as short texture, provide a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge.
The object of the present invention is achieved like this:
A kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge of the present invention, comprises the following steps:
Chemical conditioning modification procedure: the fresh sludge that is 80%-85% to water ratio by predrainage add water nurse one's health to water ratio be 90%-93%, be uniformly mixed after adding Landfill Stabilization Rate sludge incineration residue; The weight ratio of the mud that described Landfill Stabilization Rate sludge incineration residue and water ratio are 90%-93% is 10-30: 100;
Mechanical expression deep dehydration step: the sludge pump after chemical conditioning modification is entered in plate-and-frame filter press, and under the pressure of 1MPa, deep dehydration 1h, makes the water ratio of mud lower than 60%.
Above-mentioned a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge, wherein, in chemical conditioning modification procedure, described Landfill Stabilization Rate sludge incineration residue is after the cured modified processed of inorganic dewatering agent, stabilization mud after sanitary landfill 2-4 burns the residue after 1h at 900 ℃ again.
Above-mentioned a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge, wherein, the cured modified processed of described inorganic dewatering agent comprises the following steps:
To predrainage to water ratio, be, in the mud of 80%-85%, to add inorganic dewatering agent, mix rear deep dehydration, the water ratio that makes mud is 55%-60%; The weight ratio of the mud that described inorganic dewatering agent and water ratio are 80%-85% is 3-10: 100.
Above-mentioned a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge, wherein, described inorganic dewatering agent is the mixture that lime, magnesium oxide and cement are prepared from by the weight ratio of 1:1:1.
The present invention compared with prior art has the following advantages:
(1) utilize Landfill Stabilization Rate sludge incineration residue can obviously reduce the CST(capillary water absorbing time of mud, hereinafter to be referred as CST), significantly improve dewatering performance of sludge; After filter-press dehydration, moisture percentage in sewage sludge can drop to below 60%, can meet subsequent disposal handle demand;
(2) be the treatment of wastes with processes of wastes against one another, can when increasing substantially fresh sludge dewatering, realize excavation and the recycling of landfill stabilization mud, circulationization is utilized soil.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
In the present embodiment, handled fresh sludge is the product that Shanghai sludge of sewage treatment plant obtains after concentrated, centrifugal, and water ratio is 82.7%.
The Landfill Stabilization Rate sludge incineration residue using is Shanghai landfill yard sanitary landfill, and the mud after 3 years burns the residue after 1h at 900 ℃; this mud is before sanitary landfill; through following, process: to predrainage to water ratio, be in 83.6% mud; add 4% inorganic dewatering agent of mud weight; mix rear deep dehydration, the water ratio that makes mud is 59.7%; Wherein, inorganic dewatering agent is the mixture that lime, magnesium oxide, cement are prepared from by the weight ratio of 1:1:1.
Concrete steps are as follows:
1) fresh sludge that is 82.7% by water ratio adds water to be nursed one's health to water ratio 90% left and right, by 15% of mud weight, adds Landfill Stabilization Rate sludge incineration residue, is uniformly mixed;
2) sludge pump after conditioning is entered in plate-and-frame filter press, under the pressure of 1MPa, deep dehydration 1h.
When fresh sludge adds water to 90% left and right, CST is 5860.3s, after adding 15% Landfill Stabilization Rate sludge incineration residue, mud CST drops to 494.8s, and dewatering obviously improves, after press filtration deep dehydration, moisture percentage in sewage sludge is down to 59.7%, can meet follow-up sludge treatment handle demand.
Embodiment 2
With embodiment 1, just change the adding proportion of Landfill Stabilization Rate mud into 25%, the CST of the mixing sludge obtaining reduces to 440.5s, and after press filtration, water ratio is down to 56.2%.As known from compared to Example 1, the dewatering of mud is improved to some extent with the increase of Landfill Stabilization Rate sludge incineration residue adding proportion, but increase rate is not obvious.
Embodiment 3
With embodiment 1, just the mud of getting is Shanghai City sludge of sewage treatment plant, and water ratio is 84.3%, and the Landfill Stabilization Rate sludge incineration residue using is Shanghai landfill yard landfill, and the mud after 2 years burns the residue after 1h at 900 ℃.The adding proportion of Landfill Stabilization Rate sludge incineration residue is 20%.
When fresh sludge adds water to 90% left and right, CST is 4231.3s, after adding 20% Landfill Stabilization Rate sludge incineration residue, mud CST drops to 356.7s, and dewatering obviously improves, after press filtration deep dehydration, moisture percentage in sewage sludge is down to 54.5%, can meet follow-up sludge treatment handle demand.
Embodiment 4
With embodiment 1, just the mud of getting is Shanghai City sludge of sewage treatment plant, and water ratio is 80.5%, and the Landfill Stabilization Rate sludge incineration residue using is Shanghai landfill yard landfill, and the mud after 4 years burns the residue after 1h at 900 ℃.The adding proportion of Landfill Stabilization Rate sludge incineration residue is 10%.
When fresh sludge adds water to 90% left and right, CST is 2168.6s, after adding 10% Landfill Stabilization Rate sludge incineration residue, mud CST drops to 214.2s, and dewatering obviously improves, after press filtration deep dehydration, moisture percentage in sewage sludge is down to 50.9%, can meet follow-up sludge treatment handle demand.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (4)
1. utilize Landfill Stabilization Rate sludge incineration residue to solidify a deep dehydration method for fresh sludge, it is characterized in that, comprise the following steps:
Chemical conditioning modification procedure: the fresh sludge that is 80%-85% to water ratio by predrainage add water nurse one's health to water ratio be 90%-93%, be uniformly mixed after adding Landfill Stabilization Rate sludge incineration residue; The weight ratio of the mud that described Landfill Stabilization Rate sludge incineration residue and water ratio are 90%-93% is 10-30: 100;
Mechanical expression deep dehydration step: the sludge pump after chemical conditioning modification is entered in plate-and-frame filter press, and under the pressure of 1MPa, deep dehydration 1h, makes the water ratio of mud lower than 60%.
2. a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge as claimed in claim 1, it is characterized in that, in chemical conditioning modification procedure, described Landfill Stabilization Rate sludge incineration residue is after the cured modified processed of inorganic dewatering agent, stabilization mud after sanitary landfill 2-4 burns the residue after 1h at 900 ℃ again.
3. a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge as claimed in claim 2, is characterized in that, the cured modified processed of described inorganic dewatering agent comprises the following steps:
To predrainage to water ratio, be, in the mud of 80%-85%, to add inorganic dewatering agent, mix rear deep dehydration, the water ratio that makes mud is 55%-60%; The weight ratio of the mud that described inorganic dewatering agent and water ratio are 80%-85% is 3-10: 100.
4. a kind of deep dehydration method that utilizes Landfill Stabilization Rate sludge incineration residue to solidify fresh sludge as claimed in claim 3, is characterized in that, described inorganic dewatering agent is the mixture that lime, magnesium oxide and cement are prepared from by the weight ratio of 1:1:1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761111A (en) * | 2015-04-14 | 2015-07-08 | 湖南大学 | Preparation method of rice husk powder conditioning sludge incineration slag and method for conditioning urban sludge |
| CN107445444A (en) * | 2017-09-08 | 2017-12-08 | 燕京啤酒(桂林漓泉)股份有限公司 | The method of beer producers sewage disposal excess sludge deep dehydration |
| CN108658430A (en) * | 2018-05-18 | 2018-10-16 | 佛山市金凯地过滤设备有限公司 | A kind of method of deeply dehydrating sludge |
| CN112239312A (en) * | 2020-09-23 | 2021-01-19 | 杭州国泰环保科技股份有限公司 | Method for landfill of sludge |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761111A (en) * | 2015-04-14 | 2015-07-08 | 湖南大学 | Preparation method of rice husk powder conditioning sludge incineration slag and method for conditioning urban sludge |
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| CN107445444A (en) * | 2017-09-08 | 2017-12-08 | 燕京啤酒(桂林漓泉)股份有限公司 | The method of beer producers sewage disposal excess sludge deep dehydration |
| CN108658430A (en) * | 2018-05-18 | 2018-10-16 | 佛山市金凯地过滤设备有限公司 | A kind of method of deeply dehydrating sludge |
| CN108658430B (en) * | 2018-05-18 | 2020-08-25 | 佛山市金凯地过滤设备有限公司 | Deep dehydration method for sludge |
| CN112239312A (en) * | 2020-09-23 | 2021-01-19 | 杭州国泰环保科技股份有限公司 | Method for landfill of sludge |
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Inventor after: Wang Shaobo Inventor after: Jia Tinggang Inventor after: Jiu Xingfu Inventor after: Wu Fangliang Inventor after: Lin Meijing Inventor after: Mi Qiong Inventor after: Zhao Youcai Inventor after: Chang Yanjun Inventor before: Wang Shaobo Inventor before: Jia Tinggang Inventor before: Jiu Xingfu Inventor before: Wu Fangliang Inventor before: Lin Meijing Inventor before: Mi Qiong Inventor before: Zhao Youcai |
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Free format text: CORRECT: INVENTOR; FROM: WANG SHAOBO JIA TINGGANG MIAO XINGFU WU FANGLIANG LIN MEIJING MI QIONG ZHAO YOUCAI TO: WANG SHAOBO JIA TINGGANG MIAO XINGFU WU FANGLIANG LIN MEIJING MI QIONG ZHAO YOUCAI CHANG YANJUN |