CN102358679A - Sludge conditioner, and deep dehydration method by using the same - Google Patents
Sludge conditioner, and deep dehydration method by using the same Download PDFInfo
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- CN102358679A CN102358679A CN2011102796233A CN201110279623A CN102358679A CN 102358679 A CN102358679 A CN 102358679A CN 2011102796233 A CN2011102796233 A CN 2011102796233A CN 201110279623 A CN201110279623 A CN 201110279623A CN 102358679 A CN102358679 A CN 102358679A
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- conditioner
- mud
- deep dehydration
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Abstract
The invention belongs to the technical field of comprehensive utilization of solid waste, discloses a sludge conditioner, and a deep dehydration method by using the sludge conditioner. The sludge conditioner provided by the present invention comprises the following components, by weight, 30-60% of MgO, 20-40% of CaO and 20-30% of ash. The preparation method provided by the present invention comprises the following steps: grinding 40-70% by weight of magnesia and 30-60% by weight of limestone into powders, and mixing the powders; conveying the powders to a muffle furnace and burning for 1-2 hours at a temperature of 900-1000 DEG C; naturally cooling to the room temperature to prepare the sludge conditioner. The invention further discloses the deep dehydration method by using the sludge conditioner. The deep dehydration method comprises the following steps: adding the sludge conditioner to sludge, wherein the adding amount of the sludge conditioner is 5-30% of the dry weight of the sludge; stirring for 10-20 minutes; carrying out dehydration for the uniformly-stirred sludge. The sludge conditioner is nontoxic and harmless; with adopting the deep dehydration method by using the sludge conditioner, the water content in the sludge is rapidly reduced to less than 60%.
Description
Technical field
The invention belongs to solid waste comprehensive utilization technique field, relate to the deep dehydration method of a kind of sludge conditioner and use sludge conditioner.
Background technology
Mud is a kind of thick material that produces in the sewage treatment process, is the main body with aerobic, anaerobion, and organic content is higher, with water combine tightr.The water ratio of general Sewage Plant second pond mud is 97%～99%, and wherein interstitial water accounts for 70%, and capillary water accounts for about 20%, and planar water is about 7%, and water is about 3% in the born of the same parents.Sewage plant sludge is behind deposition and filter-press dehydration at present, and water ratio is 75%～85%, and the moisture form in the mud is mainly water in planar water and the born of the same parents at this moment.Common pressure filter and centrifuge can't carry out deep dehydration to this mud.The sludge volume of 80% left and right sides water ratio is bigger, and is very easily corrupt, is difficult to transportation and subsequent disposal.Research to deeply dehydrating sludge is mainly sludge curing and improves two aspects of pressure filter squeeze pressure.
Chinese patent document " efficient nano sludge dehydration conditioner " (publication number CN1621369A, open June 1 2005 date) discloses a kind of ZShi efficient nano sludge dehydration conditioner.Compound weight is: 80～98 parts of inorganic polymer dehydrating and conditioning agent, 1～19 part of organic polymer dewatering agent, 0.5～6 part in hydroxyl methylcellulose sodium, 0.1～3.5 part of nano material.The purpose of this invention is to increase neutralising capacity and bridging ability and seepage force, makes the dehydration pretreating effect of mud good.But the object of its effect is mainly the interstitial water in the mud, and is little to the deep dehydration effect of mud.
Chinese patent document " a kind of inorganic composite conditioner and mud dewatering method thereof " (publication number CN101397181A; Open April 1 2009 date); Disclose a kind of inorganic composite conditioner of sludge dewatering, comprised flyash and unslaked lime, dosage is 6%～20% of a mud weight; Carry out mechanical dehydration after stirring, moisture content of the cake is 45%～60%.The main mechanism of action of flyash is adsorption bridging, and unslaked lime plays and helps the effect of coagulating, and does not act on the interior water of born of the same parents of mud.
Chinese patent document " mechanical dehydration treatment method for sludge modification " (application publication number CN101811814A; Open August 25 2010 date); A kind of mechanical dehydration treatment method for sludge modification is disclosed; Its step is in water ratio is 80%～85% former raw sludge, to add dewatering agent, ferrous sulfate, lime, reodorant, then adds the water of former raw sludge weight 30%～50%, handles with primary crusher after stirring into mud; Pump into filter-press dehydration in the pressure filter at last, pressure is 10～14MPa.Moisture content of the cake is 50%～60%.The raw material that relates in this patent is comparatively complicated, and the mud after the conditioning has relatively high expectations to the pressure of pressure filter, and the pressure of the existing pressure filter of present domestic Sewage Plant generally only can reach 2～3MPa, therefore is not suitable for the upgrading technology of handling as sewage plant sludge.
Chinese patent document " domestic sludge dewaters with amendment and Opsonizing method " (application publication number CN101985386A; Open March 16 2011 date); Disclose a kind of domestic sludge dehydration and used amendment; Prescription comprises: the SEPIGEL 305 that accounts for pending mud dry weight 0.3%～0.9%; Account for the bamboo charcoal of pending mud dry weight 5%～20%, account for the quaternary ammonium salt of pending mud dry weight 0.2%～1%, account for the unslaked lime and the polyaluminium sulfate that accounts for pending mud dry weight 5%～20% of pending mud dry weight 2%～5%.Under normal temperature and pressure conditions, in pending mud, add said polyaluminium sulfate, unslaked lime and bamboo charcoal successively, stirring reaction adds said Vestolen PP 7052 phthalein amine and quaternary ammonium salt at least more successively after 5 minutes, stirred at least 3 minutes, and last press filtration gets final product.The raw material that this Opsonizing method relates to is more, and the bamboo charcoal source is not extensive.The main mechanism of action of each composition in the amendment is adsorption bridging and flocculation, can not really act on the interior water of born of the same parents of mud.
Summary of the invention
Big to additive amount of medicament in the prior art, can't act on problems such as cell interior water, opsonization are not remarkable; The purpose of this invention is to provide a kind of sludge conditioner, that this amendment has is nontoxic, addition is less, can not cause advantages such as secondary pollution to environment.
Another object of the present invention provides a kind of deep dehydration method that uses above-mentioned sludge conditioner, and this method is simple, and dehydration rate is high.
Technical scheme of the present invention is following:
The invention provides a kind of sludge conditioner, this sludge conditioner comprises following component and weight percentage:
MgO 30～60％，
CaO 20～40％，
Ash content 20～30%.
Described ash composition comprises silicon-dioxide, red oxide of iron, potassium oxide, Vanadium Pentoxide in FLAKES and aluminium sesquioxide etc., and the weight percentage of each ingredients constitute sludge conditioner is followed successively by 10～28%, 0.1～1.5%, 1～5%, 1～8%, 0.1～1%.
The present invention also provides a kind of preparation method of above-mentioned sludge conditioner, and this method may further comprise the steps:
Be 40～70% magnesia with weight percent with weight percent be to mix after 30～60% Wingdale is pulverized, send into 900～1000 ℃ of calcination 1～2h in the retort furnace, be cooled to room temperature naturally after, process sludge conditioner.
The present invention also provides a kind of deep dehydration method that uses above-mentioned sludge conditioner, and this method may further comprise the steps:
Sludge conditioner is joined in the mud, and the quality percentage composition that the sludge conditioner add-on accounts for mud dry weight is 5～30%, stirs 10～20min, and the mud that stirs is dewatered to get final product.
Described moisture percentage in sewage sludge >=85% like water ratio in the mud＜85%, adds water and regulates and make its water ratio >=85%.
Described sludge dewatering is to adopt pressure filter to carry out mechanical dehydration.
Moisture content of the cake after the described sludge dewatering≤60%.
The present invention compares with prior art, has following advantage and beneficial effect:
1, the inorganic chemistry amendment that the present invention adopted is nontoxic, and addition is less, can not cause secondary pollution to environment.
2, the present invention to the sludge conditioning modification after, water discharges in the part born of the same parents, the capillary water absorption time CST (capillary water absorption time) of mud reduces by 50～90%, but the press filtration performance of mud is improved greatly.
3, the present invention adopts pressure filter that mud is carried out degree of depth filter-press dehydration, makes moisture percentage in sewage sludge be reduced to fast below 60%, has improved the processing efficiency of mud, is convenient to transportation and subsequent disposal and disposes.
4, the present invention adopts the conditioning filter-pressing process factory's mud of disposing of sewage, and only needs simply transform existing sludge treatment structures and equipment, can improve the dewatering efficiency of mud greatly.
Embodiment
Below in conjunction with embodiment the present invention is further described.
Magnesia is taken from Chaohu, Anhui, and Wingdale is taken from the Qingyang, Anhui.
Embodiment 1
Be 40% magnesia with weight percent with weight percent be to mix after 60% Wingdale is pulverized, send into 900 ℃ of calcination 1h in the retort furnace, be cooled to room temperature naturally after; Process sludge conditioner; Adopt Xray fluorescence spectrometer to detect element wherein, in oxide compound, the MgO weight percent is 30% in the amendment; The CaO weight percent is 40%, and ash wt per-cent is 30%.Ash content comprises silicon-dioxide (weight percent is 24%), red oxide of iron (weight percent is 1%), potassium oxide (weight percent is 3.1%), Vanadium Pentoxide in FLAKES (weight percent is 1.5%), aluminium sesquioxide (weight percent is 0.4%) in oxide compound.
The dewatered sludge water ratio of taking from the Shanghai Sewage Plant is 77%, adds the water of mud weight 50%, regulates moisture percentage in sewage sludge to 85%.Mix the quality percentage composition that accounts for mud dry weight and be 20% above-mentioned sludge conditioner.After stirring 15min, the capillary water absorption time of mud can be reduced to 1154s by the 3762s of former raw sludge; Mud after the conditioning is pumped into pressure filter carry out mechanical dehydration, behind the squeezing pressurize 1.5h, moisture content of the cake is 57%.
Embodiment 2
Be 50% magnesia with weight percent with weight percent be to mix after 50% Wingdale is pulverized, send into 1000 ℃ of calcination 1.5h in the retort furnace, be cooled to room temperature naturally after; Process sludge conditioner; Adopt Xray fluorescence spectrometer to detect element wherein, in oxide compound, the MgO weight percent is 45% in the amendment; The CaO weight percent is 30%, and ash wt per-cent is 25%.Ash content comprises silicon-dioxide (weight percent is 18%), red oxide of iron (weight percent is 0.6%), potassium oxide (weight percent is 2.9%), Vanadium Pentoxide in FLAKES (weight percent is 3.2%), aluminium sesquioxide (weight percent is 0.3%) in oxide compound.
The dewatered sludge water ratio of taking from Jiangyin printing and dyeing mill is 80%, adds the water of mud weight 30%, regulates moisture percentage in sewage sludge to 85%.Mix the quality percentage composition that accounts for mud dry weight and be 5% above-mentioned sludge conditioner.After stirring 15min, the capillary water absorption time of mud can be reduced to 321s by the 651s of former raw sludge; Mud after the conditioning is pumped into pressure filter carry out mechanical dehydration, behind the squeezing pressurize 45min, moisture content of the cake is 53%.
Embodiment 3
Be 70% magnesia with weight percent with weight percent be to mix after 30% Wingdale is pulverized, send into 950 ℃ of calcination 2h in the retort furnace, be cooled to room temperature naturally after; Process sludge conditioner; Adopt Xray fluorescence spectrometer to detect element wherein, in oxide compound, the MgO weight percent is 60% in the amendment; The CaO weight percent is 20%, and ash wt per-cent is 20%.Ash content comprises silicon-dioxide (weight percent is 10%), red oxide of iron (weight percent is 0.3%), potassium oxide (weight percent is 2.8%), Vanadium Pentoxide in FLAKES (weight percent is 6.7%), aluminium sesquioxide (weight percent is 0.2%) in oxide compound.
The excess sludge water ratio of taking from Fuyang Sewage Plant second pond is 92%, mixes the quality percentage composition that accounts for mud dry weight and be 30% above-mentioned sludge conditioner.After stirring 15min, the capillary water absorption time of mud can be reduced to 223s by the 467s of former raw sludge; Mud after the conditioning is pumped into pressure filter carry out mechanical dehydration, behind the squeezing pressurize 60min, moisture content of the cake is 55%.
Comparative example 1
The dewatered sludge water ratio of taking from the Shanghai Sewage Plant is 77%, adds the water of mud weight 50%, regulates moisture percentage in sewage sludge to 85%.Mix the quality percentage composition that accounts for mud dry weight and be 20% technical grade CaO (purity 85%).After stirring 15min, the capillary water absorption time of mud, the 3762s by former raw sludge was increased to 4067s.
Comparative example 2
The dewatered sludge water ratio of taking from the Shanghai Sewage Plant is 77%, adds the water of mud weight 50%, regulates moisture percentage in sewage sludge to 85%.Mix the quality percentage composition that accounts for mud dry weight and be 20% technical grade MgO (purity 85%).After stirring 15min, the capillary water absorption time of mud can be reduced to 3067s by the 3762s of former raw sludge.
The capillary water absorption time in the comparative example 1 after the conditioning, the 3762s than former raw sludge increased 305s; The capillary water absorption time in the comparative example 2 after the conditioning, the 3762s than former raw sludge only reduced by 18%; Both conditioning effects are all not as good as embodiment 1; The strainability of mud does not improve, and is difficult to realize follow-up filter-press dehydration.
The above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (7)
1. sludge conditioner, it is characterized in that: this sludge conditioner comprises following component and weight percentage:
MgO 30～60％，
CaO 20～40％，
Ash content 20～30%.
2. sludge conditioner according to claim 1; It is characterized in that: described ash content comprises silicon-dioxide, red oxide of iron, potassium oxide, Vanadium Pentoxide in FLAKES and aluminium sesquioxide, and the weight percentage of each ingredients constitute sludge conditioner is followed successively by 10～28%, 0.1～1.5%, 1～5%, 1～8%, 0.1～1%.
3. the preparation method of claim 1 or 2 described sludge conditioners, it is characterized in that: this method may further comprise the steps:
Be 40～70% magnesia with weight percent with weight percent be to mix after 30～60% Wingdale is pulverized, send into 900～1000 ℃ of calcination 1～2h in the retort furnace, be cooled to room temperature naturally after, process sludge conditioner.
4. the deep dehydration method of claim 1 or 2 described sludge conditioners, it is characterized in that: this method may further comprise the steps:
Sludge conditioner is joined in the mud, and the quality percentage composition that the sludge conditioner add-on accounts for mud dry weight is 5～30%, stirs 10～20min, and the mud that stirs is dewatered to get final product.
5. the deep dehydration method of sludge conditioner according to claim 4 is characterized in that: described moisture percentage in sewage sludge >=85%.
6. the deep dehydration method of sludge conditioner according to claim 4 is characterized in that: described sludge dewatering is to adopt pressure filter to carry out mechanical dehydration.
7. the deep dehydration method of sludge conditioner according to claim 4 is characterized in that: moisture content of the cake after the described sludge dewatering≤60%.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964054A (en) * | 2012-12-07 | 2013-03-13 | 山西艾森资源综合利用技术研究院 | Rapid drying process for dewatered sludge |
| CN103113013A (en) * | 2013-02-01 | 2013-05-22 | 深圳市水务(集团)有限公司 | Compound type sludge dewatering conditioner and application method thereof |
| CN103626378A (en) * | 2013-10-31 | 2014-03-12 | 中国矿业大学 | Sludge composite conditioner and conditioning method using same |
| CN104803567A (en) * | 2015-02-14 | 2015-07-29 | 广州市正源环境工程有限公司 | Sludge modifier, and method used for preparing subgrade soil from sludge via modification |
| CN104803656A (en) * | 2015-02-14 | 2015-07-29 | 广州市正源环境工程有限公司 | Method used for preparing sintered bricks with modified sludge |
| CN105217926A (en) * | 2015-10-20 | 2016-01-06 | 盐城琛丹低碳技术研究院有限公司 | Sludge reduction method |
| CN105837005A (en) * | 2016-06-13 | 2016-08-10 | 山东省科学院能源研究所 | Municipal excess sludge biologic drying organic conditioning agent and preparation method thereof |
| CN106746483A (en) * | 2017-02-10 | 2017-05-31 | 周毅 | The agent of compound type sludge decrement, preparation method and applications |
| CN112429938A (en) * | 2020-10-27 | 2021-03-02 | 浙江中呈科技股份有限公司 | Deep dehydration method using sludge conditioner and equipment thereof |
| CN112774657A (en) * | 2020-12-28 | 2021-05-11 | 江苏新聚环保科技有限公司 | Catalyst for activated sludge deodorization and method for deodorizing activated sludge and accelerating sludge precipitation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539121A (en) * | 1984-01-18 | 1985-09-03 | Kapland Mitchell A | Bay mud stabilization |
| JP2004141774A (en) * | 2002-10-24 | 2004-05-20 | Kurita Water Ind Ltd | Method of purifying soil or deposited substance |
| CN1962497A (en) * | 2006-11-27 | 2007-05-16 | 武汉路德科技有限责任公司 | Sludge drying agent and its preparing method |
| CN101062824A (en) * | 2007-04-17 | 2007-10-31 | 同济大学 | Sludge gelling curing agent and application thereof |
-
2011
- 2011-09-20 CN CN201110279623.3A patent/CN102358679B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539121A (en) * | 1984-01-18 | 1985-09-03 | Kapland Mitchell A | Bay mud stabilization |
| JP2004141774A (en) * | 2002-10-24 | 2004-05-20 | Kurita Water Ind Ltd | Method of purifying soil or deposited substance |
| CN1962497A (en) * | 2006-11-27 | 2007-05-16 | 武汉路德科技有限责任公司 | Sludge drying agent and its preparing method |
| CN101062824A (en) * | 2007-04-17 | 2007-10-31 | 同济大学 | Sludge gelling curing agent and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 赵由才等: "城市与工业污泥化学调理与软框压滤深度脱水技术", 《水工业市场》, no. 9, 15 September 2011 (2011-09-15) * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964054A (en) * | 2012-12-07 | 2013-03-13 | 山西艾森资源综合利用技术研究院 | Rapid drying process for dewatered sludge |
| CN103113013A (en) * | 2013-02-01 | 2013-05-22 | 深圳市水务(集团)有限公司 | Compound type sludge dewatering conditioner and application method thereof |
| CN103626378A (en) * | 2013-10-31 | 2014-03-12 | 中国矿业大学 | Sludge composite conditioner and conditioning method using same |
| CN104803567A (en) * | 2015-02-14 | 2015-07-29 | 广州市正源环境工程有限公司 | Sludge modifier, and method used for preparing subgrade soil from sludge via modification |
| CN104803656A (en) * | 2015-02-14 | 2015-07-29 | 广州市正源环境工程有限公司 | Method used for preparing sintered bricks with modified sludge |
| CN104803656B (en) * | 2015-02-14 | 2017-05-10 | 广州市正源环境工程有限公司 | Method used for preparing sintered bricks with modified sludge |
| CN105217926A (en) * | 2015-10-20 | 2016-01-06 | 盐城琛丹低碳技术研究院有限公司 | Sludge reduction method |
| CN105837005A (en) * | 2016-06-13 | 2016-08-10 | 山东省科学院能源研究所 | Municipal excess sludge biologic drying organic conditioning agent and preparation method thereof |
| CN106746483A (en) * | 2017-02-10 | 2017-05-31 | 周毅 | The agent of compound type sludge decrement, preparation method and applications |
| CN112429938A (en) * | 2020-10-27 | 2021-03-02 | 浙江中呈科技股份有限公司 | Deep dehydration method using sludge conditioner and equipment thereof |
| CN112774657A (en) * | 2020-12-28 | 2021-05-11 | 江苏新聚环保科技有限公司 | Catalyst for activated sludge deodorization and method for deodorizing activated sludge and accelerating sludge precipitation |
| CN112774657B (en) * | 2020-12-28 | 2023-06-16 | 江苏新聚环保科技有限公司 | Catalyst for deodorizing activated sludge and method for deodorizing activated sludge and accelerating sludge precipitation |
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| CN102358679B (en) | 2014-05-21 |
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