CN104129897B - The dewatering process of one way of life mud - Google Patents
The dewatering process of one way of life mud Download PDFInfo
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- CN104129897B CN104129897B CN201410403184.6A CN201410403184A CN104129897B CN 104129897 B CN104129897 B CN 104129897B CN 201410403184 A CN201410403184 A CN 201410403184A CN 104129897 B CN104129897 B CN 104129897B
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Abstract
The invention provides the dewatering process of one way of life mud, belong to technical field of sludge treatment.It solve the higher and with serious pollution problem of existing domestic sludge processing cost.The dewatering process of domestic sludge, is made up of following steps: step one: the mix and blend that added water by domestic sludge forms initial sludge slurry；Step 2: add sulphuric acid, carry out first precipitation process after stirring；Step 3: add the pH value of the initial sludge slurry of calcium oxide adjustment, and carry out secondary precipitation process；Step 4: water filling dilution forms secondary sludge slurry again；Step 5: press in pressure filter, makes secondary sludge slurry solid-liquid separation occur and form dehydrated sludge cake；Step 6: dehydrated sludge cake is uniformly stacked, and carry out nature mummification.Domestic sludge can be carried out drying and other treatment by it, and is compressed into solid block structure, it is simple to recycling.
Description
Technical field
The invention belongs to technical field of sludge treatment, relate to the dewatering process of a kind of mud, particularly the dewatering process of one way of life mud.
Background technology
No matter it is the living area in city, or manufacturing enterprise region, capital produces substantial amounts of sanitary sewage or production waste, the discharge capacity of sanitary sewage has exceeded industrial wastewater discharge amount, these sewage process in heel row winding border through sewage treatment plant, process in the process of sewage in sewage treatment plant, substantial amounts of mud under precipitating in treatment tank, and mud is the final accessory products of sewage disposal, these mud include substantial amounts of microorganism, organic and abundant nutrient substance, even include a small amount of metal fragment and pathogenic microorganism etc., thus whether mud can properly dispose the success or not being related to whole sewage disposal system.
The main disposal means of current mud have: landfill, compost, expense are few.But landfill can cause land wastage, and has secondary pollution；Compost then needs maintenance dry in the sun transpiring moisture, occupied ground is more, transformation time is longer, also pollutes the environment equally；The equipment investment directly burned is big, operation cost is higher, but also the problem that poisonous gas discharge can be had.Owing to mud including the calorific value of up to 3500～4500 kilocalories, thus comparatively speaking, it is a kind of processing method preferably burning, the maximization of mud decrement can not only be realized, and can resource again with, be used for the generating that heats, sludge incineration ash energy brickmaking etc. acts on, the cost of balance Treatment of Sludge, it is achieved innoxious, the minimizing of mud, resource.
Summary of the invention
It is an object of the invention to there are the problems referred to above for existing technology, it is proposed that the dewatering process of one way of life mud, domestic sludge can be carried out drying and other treatment by it, and is compressed into solid block structure, it is simple to recycling.
The purpose of the present invention can be realized by following technical proposal: the dewatering process of one way of life mud, it is characterised in that be made up of following steps:
Step one: add water mixing by domestic sludge, stirring forms initial sludge slurry；
Step 2: add sulphuric acid in initial sludge slurry and be again stirring for, carrying out first precipitation process after stirring；
Step 3: add the pH value of the initial sludge slurry of calcium oxide adjustment in the initial sludge slurry after first precipitation processes, and carry out secondary precipitation process；
Step 4: the initial sludge slurry water filling after secondary precipitation is diluted and again forms secondary sludge slurry；
Step 5: the secondary sludge slurry after dilution being processed presses in pressure filter, makes secondary sludge slurry solid-liquid separation occur and form dehydrated sludge cake；
Step 6: dehydrated sludge cake is uniformly stacked, and carry out nature mummification.
In the technical program, by adding concentrated sulphuric acid successively and carrying out precipitation and can remove the solid impurity in initial sludge slurry and harmful gas, and carry out sterilizing, calcium oxide is as additive, namely the infiltration coefficient of mud after secondary precipitation can be improved, mud moisture when receiving pressure can be discharged quickly, reduce the time of filter pressing, the concentrated sulphuric acid added in initial sludge slurry can also be neutralized simultaneously, adjust the pH value of initial sludge slurry, desulfurization for subsequent applications is laid the groundwork, the final dehydrated sludge cake prepared reduces moisture content further after natural mummification, its chemical composition forms close to clinker, thus the adjuvant in can producing as coagulating cement earth building blocks uses, play recycling.
In the dewatering process of above-mentioned domestic sludge, the water added in described step one is sea water, and the moisture content of described initial sludge slurry is 88～93%.Cement concrete building enterprise mostly builds by the sea, fetch water nearby, simple and convenient, and be diluted by sea water can also using water wisely cost effectively, in addition in sea water rich in sodium chloride and the concentrated sulphuric acid of follow-up interpolation match and can realize better deodorization and sterilization effect, the calcium ion and the carbanion that contain in sea water may be combined in dehydrated sludge cake simultaneously so that the composition of dehydrated sludge cake is close to the composition of clinker.
In the dewatering process of above-mentioned domestic sludge, the sulfuric acid concentration in described step 2 is 95～98%.The sulphuric acid of high concentration can play the effect of dehydration, sterilization and decomposition toxic gas, simultaneously because domestic sludge is water-reducible through sea, alkalescence on the weak side, pH value can be adjusted by adding sulphuric acid, thus reducing follow-up Calcium Oxide Dosage, saving production cost, the sulphuric acid of this regional value can realize the alkalescence neutralization to sea water, is avoided that again domestic sludge over oxidation.
In the dewatering process of above-mentioned domestic sludge, the addition of the sulphuric acid in described step 2 is the 0.08～0.15% of initial sludge slurry weight.The density of initial sludge slurry is at 1.02～1.05t/m3, in the technical program, it is preferred to 1 cubic metre of initial sludge slurry adds the concentrated sulphuric acid of 1 kilogram.
In the dewatering process of above-mentioned domestic sludge, the pH value adding the initial sludge slurry after calcium oxide and secondary precipitation in described step 3 is 6.5～7.5.Concentrated sulphuric acid in initial sludge slurry is neutralized by calcium oxide so that the initial sludge slurry after process is in neutrality.
In the dewatering process of above-mentioned domestic sludge, in described step 3, the addition of calcium oxide is 2～2.5% of the initial sludge slurry weight after first precipitation.The initial sludge slurry of 6 cubes preferably adds the calcium oxide of 140 kilograms.
In the dewatering process of above-mentioned domestic sludge, the dust polymerization thing that the calcium oxide source added in described step 3 is removed for rotary kiln cold smoke room in the production of coagulating cement earth building blocks.The production auxiliary materials of concrete segment it is used as after domestic sludge dehydration in the technical program, and the calcium oxide used in domestic sludge dehydration derives from the deashing of cold smoke room, make the composition of the dehydrated sludge cake after mummification closer to clinker, serve recycling, reduce entreprise cost.
In the dewatering process of above-mentioned domestic sludge, in described step 4, the solid content of secondary sludge slurry is 12～18%.After sludge slurry dilutes again, it is simple to follow-up filter pressing operates, secondary sludge slurry filter pressing better effects if in follow-up pressure-filtering process of this value region.
In the dewatering process of above-mentioned domestic sludge, in described step 5, the operating pressure of pressure filter is 6～8MPa, and the process time is 10～18 minutes, and the thickness of the dehydrated sludge cake after filter pressing is 10～25mm, and moisture content is 40～50%.Pressure filter is to utilize a kind of special filter medium, object is applied certain pressure so that liquid dialysis a kind of plant equipment out, in the technical program, the moisture content preferred value of dehydrated sludge cake is 45%, under this state, pressure filter energy consumption is relatively minimum, and filter pressing effect is relatively best.
In the dewatering process of above-mentioned domestic sludge, the stacking of described dehydrated sludge cake is highly 40～70cm, and natural mummification 24～36 hours is until the moisture content of dehydrated sludge cake reduces to 20～25%.
Compared with prior art, the present invention has the advantage that 1, the dehydration reduced training of domestic sludge is obvious, and dehydrating effect is good；2, in processing procedure, impurity discharge capacity is few, does not produce secondary pollution, and concentrated sulphuric acid except dehydration also with deodorizing effect, it is possible to reduce dehydrated sludge cake is foul gas volatile quantity in natural drying process, avoids fermentation rotten simultaneously；3, the dust polymerization thing that in the production of application coagulating cement earth building blocks, rotary kiln cold smoke room is removed is as the main source of calcium oxide component, decrease daily discharge capacity, the dehydrated sludge cake composition prepared can also be made to be closer to clinker simultaneously, serve the effect recycled, there is bigger economy, environmental and social benefits.
Detailed description of the invention
The following is specific embodiments of the invention, technical scheme is further described, but the present invention is not limited to these embodiments.
Embodiment one:
The present embodiment is the dewatering process of one way of life mud, is made up of following steps:
Step one: domestic sludge is added sea water and mixes, and stir the initial sludge slurry of formation, the moisture content of initial sludge slurry is 88%；
Step 2: adding the concentrated sulphuric acid of 98% in initial sludge slurry and be again stirring for, the addition of concentrated sulphuric acid is the 0.08% of initial sludge slurry weight, carries out first precipitation process after stirring；
Step 3: adding calcium oxide in the initial sludge slurry after first precipitation processes, adjust the pH value of initial sludge slurry to 7, the addition of calcium oxide is 2.3% of the initial sludge slurry weight after first precipitation, and carries out secondary precipitation process；
Step 4: the initial sludge slurry water filling after secondary precipitation being diluted and again form secondary sludge slurry, the solid content of secondary sludge slurry is 15%；
Step 5: the secondary sludge slurry after dilution being processed presses in pressure filter, making secondary sludge slurry solid-liquid separation occur and form dehydrated sludge cake, the operating pressure of pressure filter is 7MPa, and the process time is 15 minutes, the thickness of the dehydrated sludge cake after filter pressing is 25mm, and the moisture content of dehydrated sludge cake is 45%；
Step 6: uniformly stacked by dehydrated sludge cake, the stacking of dehydrated sludge cake is highly 40cm, and natural mummification 24 hours, until the moisture content of dehydrated sludge cake is reduced to 25%.
In this embodiment, sulfuric acid concentration is higher, and under the various additives and process operations of series, dehydration and deodorizing effect are best, and pH value is in neutrality, will not human body be worked the mischief.
Embodiment two:
The present embodiment is the dewatering process of one way of life mud, is made up of following steps:
Step one: domestic sludge is added sea water and mixes, and stir the initial sludge slurry of formation, the moisture content of initial sludge slurry is 93%；
Step 2: adding the concentrated sulphuric acid of 95% in initial sludge slurry and be again stirring for, the addition of concentrated sulphuric acid is the 0.15% of initial sludge slurry weight, carries out first precipitation process after stirring；
Step 3: adding calcium oxide in the initial sludge slurry after first precipitation processes, adjust the pH value of initial sludge slurry to 6.5, the addition of calcium oxide is 2% of the initial sludge slurry weight after first precipitation, and carries out secondary precipitation process；
Step 4: the initial sludge slurry water filling after secondary precipitation being diluted and again form secondary sludge slurry, the solid content of secondary sludge slurry is 18%；
Step 5: the secondary sludge slurry after dilution being processed presses in pressure filter, making secondary sludge slurry solid-liquid separation occur and form dehydrated sludge cake, the operating pressure of pressure filter is 6MPa, and the process time is 18 minutes, the thickness of the dehydrated sludge cake after filter pressing is 10mm, and the moisture content of dehydrated sludge cake is 50%；
Step 6: uniformly stacked by dehydrated sludge cake, the stacking of dehydrated sludge cake is highly 70cm, and natural mummification 36 hours, until the moisture content of dehydrated sludge cake is reduced to 20%.
In this embodiment, sulphuric acid and calcium oxide content are less, and under the premise ensureing dehydrating effect, material usage is minimum.Embodiment three:
The present embodiment is the dewatering process of one way of life mud, is made up of following steps:
Step one: domestic sludge is added sea water and mixes, and stir the initial sludge slurry of formation, the moisture content of initial sludge slurry is 90%；
Step 2: adding the concentrated sulphuric acid of 96% in initial sludge slurry and be again stirring for, the addition of concentrated sulphuric acid is the 0.12% of initial sludge slurry weight, carries out first precipitation process after stirring；
Step 3: adding calcium oxide in the sludge slurry after first precipitation processes, adjust the pH value of initial sludge slurry to 7.5, the addition of calcium oxide is 2.5% of the initial sludge slurry weight after first precipitation, and carries out secondary precipitation process；
Step 4: the initial sludge slurry water filling after secondary precipitation being diluted and again form secondary sludge slurry, the solid content of secondary sludge slurry is 16%；
Step 5: the secondary sludge slurry after dilution being processed presses in pressure filter, making secondary sludge slurry solid-liquid separation occur and form dehydrated sludge cake, the operating pressure of pressure filter is 8MPa, and the process time is 10 minutes, the thickness of the dehydrated sludge cake after filter pressing is 15mm, and the moisture content of dehydrated sludge cake is 40%；
Step 6: uniformly stacked by dehydrated sludge cake, the stacking of dehydrated sludge cake is highly 55cm, and natural mummification 30 hours, until the moisture content of dehydrated sludge cake is reduced to 23%.
In this embodiment, pH value is higher, and when follow-up dehydrated sludge cake is stacked, foul smell distributes minimum, and harm is little.
Calcium oxide in above-described embodiment is all originated the dust polymerization thing removed of rotary kiln cold smoke room in producing for coagulating cement earth building blocks, thus reducing deashing discharge capacity and reducing the consumption of calcium oxide, while the composition of dehydrated sludge cake can also be made close to clinker.The precipitation time after interpolation sulphuric acid in above-described embodiment is 36～48 hours, and the precipitation time after calcium oxide of adding is 12～24 hours.
Specific embodiment described herein is only to present invention spirit explanation for example.Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount the scope that appended claims is defined.
Claims (10)
1. the dewatering process of one way of life mud, it is characterised in that be made up of following steps:
Step one: domestic sludge adds sea water mixing, and stirring forms initial sludge slurry；
Step 2: add concentrated sulphuric acid in initial sludge slurry and be again stirring for, carrying out first precipitation process after stirring；
Step 3: add the pH value of the initial sludge slurry of calcium oxide adjustment in the initial sludge slurry after first precipitation processes, and carry out secondary precipitation process；
Step 4: the initial sludge slurry water filling after secondary precipitation is diluted and again forms secondary sludge slurry；
Step 5: the secondary sludge slurry after dilution being processed presses in pressure filter, makes secondary sludge slurry solid-liquid separation occur and form dehydrated sludge cake；
Step 6: dehydrated sludge cake is uniformly stacked, and carry out nature mummification.
2. the dewatering process of domestic sludge according to claim 1, it is characterised in that the moisture content of described initial sludge slurry is 88～93%.
3. the dewatering process of domestic sludge according to claim 1 and 2, it is characterised in that the sulfuric acid concentration in described step 2 is 95～98%.
4. the dewatering process of domestic sludge according to claim 3, it is characterised in that the addition of the sulphuric acid in described step 2 is the 0.08～0.15% of initial sludge slurry weight.
5. the dewatering process of domestic sludge according to claim 4, it is characterised in that the pH value adding the initial sludge slurry after calcium oxide and secondary precipitation in described step 3 is 6.5～7.5.
6. the dewatering process of domestic sludge according to claim 5, it is characterised in that in described step 3, the addition of calcium oxide is 2～2.5% of the initial sludge slurry weight after first precipitation.
7. the dewatering process of domestic sludge according to claim 6, it is characterised in that the dust polymerization thing that the calcium oxide source added in described step 3 is removed for rotary kiln cold smoke room in the production of coagulating cement earth building blocks.
8. the dewatering process of domestic sludge according to claim 1, it is characterised in that in described step 4, the solid content of secondary sludge slurry is 12～18%.
9. the dewatering process of domestic sludge according to claim 1, it is characterised in that in described step 5, the operating pressure of pressure filter is 6～8MPa, and the process time is 10～18 minutes, the thickness of the dehydrated sludge cake after filter pressing is 10～25mm, and moisture content is 40～50%.
10. the dewatering process of domestic sludge according to claim 1, it is characterised in that the stacking of described dehydrated sludge cake is highly 40～70cm, and natural mummification 24～36 hours is until the moisture content of dehydrated sludge cake reduces to 20～25%.
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| CN108046560A (en) * | 2017-12-20 | 2018-05-18 | 安徽摩诃环保科技有限公司 | A kind of UV/Fe2(C2O4)3/H2O2Oxidation processes sludge processes |
| CN109293067A (en) * | 2018-11-11 | 2019-02-01 | 中铁十四局集团大盾构工程有限公司 | A kind of flocculation self weight curing method and device for shield slurry |
| CN110803849A (en) * | 2019-11-06 | 2020-02-18 | 广东益诺欧环保股份有限公司 | Sludge reduction treatment system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367759A (en) * | 1999-08-03 | 2002-09-04 | 加拿大国家科学研究院 | Hybrid chemical and biological process for decontaminating sludge from municipal sewage |
| CN1480265A (en) * | 2003-07-14 | 2004-03-10 | 浙江省农业科学院 | Method for treating organic material without ferment process |
| CN101234841A (en) * | 2008-01-02 | 2008-08-06 | 广州普得环保设备有限公司 | Sludge concentration dehydration method |
| CN102408178A (en) * | 2010-09-21 | 2012-04-11 | 上海市政工程设计研究总院 | Deep dewatering method for sludge |
| CN102464440A (en) * | 2010-11-05 | 2012-05-23 | 广东溢达纺织有限公司 | Method for carrying out decrement on physicochemical and biochemical mixed sludge |
| CN102476961A (en) * | 2010-11-29 | 2012-05-30 | 韩国科学技术研究院 | Method and apparatus for producing organic fertilizer with sewage and sludge |
| CN103319066A (en) * | 2012-03-23 | 2013-09-25 | 宇星科技发展(深圳)有限公司 | Sludge deep dehydration method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MXNL02000017A (en) * | 2002-05-28 | 2003-12-02 | Cabello Fuentes Jose | Transformation process of npk-type granulated fertilizers, from residual muds generated in municipal sewage waters. |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367759A (en) * | 1999-08-03 | 2002-09-04 | 加拿大国家科学研究院 | Hybrid chemical and biological process for decontaminating sludge from municipal sewage |
| CN1480265A (en) * | 2003-07-14 | 2004-03-10 | 浙江省农业科学院 | Method for treating organic material without ferment process |
| CN101234841A (en) * | 2008-01-02 | 2008-08-06 | 广州普得环保设备有限公司 | Sludge concentration dehydration method |
| CN102408178A (en) * | 2010-09-21 | 2012-04-11 | 上海市政工程设计研究总院 | Deep dewatering method for sludge |
| CN102464440A (en) * | 2010-11-05 | 2012-05-23 | 广东溢达纺织有限公司 | Method for carrying out decrement on physicochemical and biochemical mixed sludge |
| CN102476961A (en) * | 2010-11-29 | 2012-05-30 | 韩国科学技术研究院 | Method and apparatus for producing organic fertilizer with sewage and sludge |
| CN103319066A (en) * | 2012-03-23 | 2013-09-25 | 宇星科技发展(深圳)有限公司 | Sludge deep dehydration method |
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Address after: 318000, Jiaojiang, Zhejiang province Taizhou Binhai Industrial block ten Tong (north of development avenue) Patentee after: Zhejiang Fang Yuanxin materials Limited by Share Ltd Address before: 318000, Jiaojiang, Zhejiang province Taizhou Binhai Industrial block ten Tong (north of development avenue) Patentee before: Zhejiang Fangyuan Building Materials Technology Co., Ltd. |
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