CN105502884A - High-efficiency and low-cost sludge dewatering method - Google Patents
High-efficiency and low-cost sludge dewatering method Download PDFInfo
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- CN105502884A CN105502884A CN201510886519.9A CN201510886519A CN105502884A CN 105502884 A CN105502884 A CN 105502884A CN 201510886519 A CN201510886519 A CN 201510886519A CN 105502884 A CN105502884 A CN 105502884A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000010802 sludge Substances 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000654 additive Substances 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 230000000996 additive effect Effects 0.000 claims abstract description 21
- 239000003814 drug Substances 0.000 claims abstract description 11
- 239000003077 lignite Substances 0.000 claims abstract description 7
- 239000002480 mineral oil Substances 0.000 claims abstract description 7
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 7
- 239000002802 bituminous coal Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 4
- 239000010903 husk Substances 0.000 claims abstract description 4
- 235000009566 rice Nutrition 0.000 claims abstract description 4
- 240000007594 Oryza sativa Species 0.000 claims abstract 2
- 230000018044 dehydration Effects 0.000 claims description 24
- 238000006297 dehydration reaction Methods 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 12
- 238000006477 desulfuration reaction Methods 0.000 claims description 10
- 230000023556 desulfurization Effects 0.000 claims description 10
- 241000196324 Embryophyta Species 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 5
- 239000010920 waste tyre Substances 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 abstract 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 abstract 1
- 239000003830 anthracite Substances 0.000 abstract 1
- 235000013339 cereals Nutrition 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 239000004449 solid propellant Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 238000007605 air drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- -1 junked tire Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a high-efficiency and low-cost sludge dewatering method. The method comprises steps as follows: 100 parts by weight of an additive with the grain size of 80-120 meshes are added to 50-200 parts by weight of wet sludge, the additive and the wet sludge are mixed and stirred, and a water breaking agent with the water content not higher than 20% is prepared from the mixture after press filtering and dewatering; the 100 parts by weight of the additive comprise 10-20 parts by weight of a component A, 10-20 parts by weight of a component B, 10-20 parts by weight of a component C and 40-70 parts by weight of a component D; the component A is desulfurated lignite and/or desulfurated bituminous coal; the component B is one or more of saw dust, rice husks and anthracite; the component C is scrape tire powder and/or used mineral oil; the component D is traditional Chinese medicine residues; (2), 10-30 parts by weight of the water breaking agent are added to 100 parts by weight of the wet sludge, the water breaking agent and the wet sludge are mixed and stirred, and dry sludge with the water content not higher than 30% is prepared from the mixture after press filtering and dewatering. According to the sludge dewatering method, the water content of the sludge can be lower than 30% and even can be close to 20% under the action of a belt filter press, the cost is low, and the method can be suitable for large-scale application.
Description
Technical field
The present invention relates to a kind of mud dewatering method of high efficiency, low cost, belong to sludge dewatering technical field.
Background technology
Along with urban wastewater treatment amount constantly increases, the sludge handling problem that sewage disposal produces is increasingly outstanding.The process of current China mud is disposed and is adopted landfill more, and the amount of other processing mode lignin-sludges is very little, and landfill mud affects very large on surrounding environment and groundwater resource, there is serious secondary pollution.The mud of China's landfill exceedes several hundred million tons according to incompletely statistics, and annual amount of landfill is more than 3,000 ten thousand tons now.The mud of these landfills also manufactures new pollution a large amount of, causes great disastrous effect to the environment of periphery.In prior art to the process of mud also just like: anhydration and incineration method, as process means such as soil or building materials utilizations, but all there is the defects such as secondary pollution in these technology.
In lignin-sludge process, sludge dewatering is absolutely necessary the method for step, sludge dewatering, mainly contains nature mummification method, mechanical dehydration method and comminution granulation.Nature mummification method and mechanical dehydration method are applicable to sewage sludge; Comminution granulation is applicable to the mud of coagulating sedimentation.Wherein the most frequently used is mechanical dehydration method, but the mud produced due to sewage disposal has higher water content, due to the characteristic that moisture is combined with mud granule, adopt mechanical means to remove and has certain restriction, the addition of the organic content in mud, ash content ratio particularly flocculation agent is for final solid content important.In general, adopt mechanical dehydration can obtain the solid content of 20-30%, the mud formed is also referred to as mud cake.The water ratio of mud cake is still higher, reaches 80%, has fluid properties, its dispose difficulty and cost still higher, be therefore necessary to reduce its water ratio further.Now, outside natural air drying, only have and form evaporation by input heat, extensive decrement can be realized.Adopting heat to carry out dry process is exactly heat drying.Natural air drying is consuming time, and heat drying consumes energy, and dehydration cost is all higher.
Summary of the invention
The technical problem that the present invention solves provides a kind of mud dewatering method of high efficiency, low cost, is applicable to large batch of sludge dewatering operation, uses the moisture percentage in sewage sludge after belt type filter-pressing dehydration plant to be reduced to less than 30%.
Technical scheme of the present invention is, provides a kind of mud dewatering method of high efficiency, low cost, comprise the following steps into:
(1) by weight, in 50-200 part wets mud, add 100 parts of particle diameters is 80-120 object additive, and mix and blend, makes the breakwater agent that water ratio is no more than 20% after filter-press dehydration; Wherein, the component D of the component A of 10-20 part, the B component of 10-20 part, the component C of 10-20 part and 40-70 part is comprised in the additive of 100 parts; Component A is desulfurization brown coal and/or desulfurization bituminous coal; B component is one or more in wood chip, rice husk, hard coal; Component C is scrap tire powder and/or waste mineral oil, and component D is Chinese medicine dreg;
(2) by weight, in 100 parts of wet mud, add 10-30 part breakwater agent, mix and blend, after filter-press dehydration, obtain the dewatered sludge that water ratio is no more than 30%.
Further, in the additive of 100 parts, the weight part of described component D is 50-60 part.
Further, described filter-press dehydration is belt type filter-pressing dehydration plant.
Further, the water ratio of described wet mud is more than 75%.
Below the present invention be further explained and illustrate.
The dehydration mud of high-moisture percentage being carried out to low cost is a technical barrier always, the present invention utilizes homemade additive and wet mud to be hybridly prepared into the one's water breaks of breakwater agent for wet mud, makes wet mud that the water ratio of mud can be made under the effect of belt filter press to be reduced to less than 30%.Additive of the present invention not only can one's water breaks, can also deodorizing, and also need higher calorific value, namely can burn releasing heat simultaneously; The more important thing is, these additives are mostly waste, as brown coal, junked tire, waste mineral oil, the dregs of a decoction etc.In view of the multiple effect of additive of the present invention, in the process preparing breakwater agent, the addition of additive in wet mud can be very large, and addition is generally not less than the 50wt% of wet mud weight.Breakwater agent of the present invention makes by after additive and wet sludge dewatering, because the ratio of additive is great, can mix one's water breaks again, can make full use of the one's water breaks effect of additive after making breakwater agent with a large amount of wet mud.
The principle of one's water breaks is mainly adsorbed, and have four kinds of water in mud, wherein, free water accounts for 60-75%, and surface adsorption water accounts for 15-20%, capillary adsorbed water 10-15%; Bound moisture 5-10%; Our homemade breakwater agent, is also good sorbent material in fact, has very strong adsorptivity to water.After breakwater agent has adsorbed moisture content, then by less external force, belt filter press dehydration can reach water ratio less than 30%.
Chinese medicine dreg of the present invention is used in the dehydration of mud as a kind of important component of additive, and Chinese medicine dreg is residue surplus after Traditional Chinese medicine decocting, and because medicinal effective constituent major part is extracted, the dregs of a decoction are difficult to recycle as a kind of waste.And the present invention finds Chinese medicine dreg after a kind of component use of additive, its one's water breaks effect is fine.So just can solve the recycling problem of waste Chinese medicine dreg and the one's water breaks problem of mud simultaneously.Make the dewatered sludge that obtains after dewatering in this way good due to its calorific value, can solid fuel be made, realize the recovery of resource and make full use of.
The water ratio of mud refers to mass percent moisture in mud; Wt% represents mass percent.
Compared with prior art, the invention has the beneficial effects as follows:
(1) mud dewatering method of the present invention uses homemade breakwater agent, and one's water breaks is effective, and mud can be made to realize at lower pressures dewatering largely, and the water ratio of mud namely can be made under belt filter press to reach less than 30%, even close to 20%;
(2) mud dewatering method of the present invention uses homemade breakwater agent to make use of multiple waste, has agricultural, forestry, organic waste etc., achieves recovery and the utilization of refuse;
(3) breakwater agent of the mud after dehydration and waste composition contains higher calorific value, can use, turn waste into wealth as solid fuel.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
The present embodiment provides a kind of mud dewatering method of high efficiency, low cost, and concrete steps are:
(1) at 100kg water ratio be 78% wet mud in add 100kg particle diameter be 100 object additives, mix and blend, makes the breakwater agent of water ratio 15% after belt type filter-pressing dehydration plant; Wherein, 100kg additive contains: the component A of 20kg, the B component of 20kg, the component C of 20kg and the component D of 40kg; Component A is desulfurization brown coal and each 10kg of desulfurization bituminous coal; B component is wood chip, each 5kg of rice husk, hard coal 10kg; Component C is scrap tire powder 15kg, waste mineral oil 5kg; Component D is Chinese medicine dreg 40kg;
(2) at 100kg water ratio be 78% wet mud in add 20kg breakwater agent, mix and blend, the dewatered sludge obtained after belt type filter-pressing dehydration plant; Described dewatered sludge is directly compressed into solid fuel.
Sample made by solid fuel above-mentioned steps obtained, survey inspection center in Coal In Hunan safety check to detect, be 29.7% according to the water ratio that relevant GB (GB/T212-2008, GB/T213-2008, GB/T211-2007, GB474-2008) records, dry base gross calorific value is 23.30MJ/kg, and net calorific value as received basis is 15.13MJ/kg.
Embodiment 2
The present embodiment provides a kind of method of mud preparing solid fuel, and concrete steps are:
(1) at 100kg water ratio be 82% wet mud in add 100kg particle diameter be 80 object additives, mix and blend, makes the breakwater agent that water ratio is 12% after belt type filter-pressing dehydration plant; Wherein, 100kg additive contains: the component A of 10kg, the B component of 10kg, the component C of 10kg and the component D of 70kg; Component A is desulfurization brown coal and each 5kg of desulfurization bituminous coal; B component is wood chip, each 5kg of hard coal; Component C is scrap tire powder 5kg, waste mineral oil 5kg; Component D is Chinese medicine dreg 70kg;
(2) at 100kg water ratio be 82% wet mud in add 20kg breakwater agent, mix and blend, the dewatered sludge obtained after belt type filter-pressing dehydration plant; Described dewatered sludge is directly compressed into solid fuel.
Sample made by solid fuel above-mentioned steps obtained, survey inspection center in Coal In Hunan safety check to detect, be 25.0% according to the water ratio that relevant GB (GB/T212-2008, GB/T213-2008, GB/T211-2007, GB474-2008) records, dry base gross calorific value is 23.86MJ/kg, and net calorific value as received basis is 16.95MJ/kg.
Embodiment 3
The present embodiment provides a kind of method of mud preparing solid fuel, and concrete steps are:
(1) at 100kg water ratio be 85% wet mud in add 100kg particle diameter be 120 object additives, mix and blend, makes the breakwater agent that water ratio is 12% after belt type filter-pressing dehydration plant; Wherein, 100kg additive contains: the component A of 10kg, the B component of 20kg, the component C of 15kg and the component D of 55kg; Component A is desulfurization brown coal and each 5kg of desulfurization bituminous coal; B component is wood chip 12kg, hard coal 8kg; Component C is scrap tire powder 5kg, waste mineral oil 10kg; Component D is Chinese medicine dreg 55kg;
(2) at 100kg water ratio be 85% wet mud in add 20kg breakwater agent, mix and blend, the dewatered sludge obtained after belt type filter-pressing dehydration plant; Described dewatered sludge is directly compressed into solid fuel.
Sample made by solid fuel above-mentioned steps obtained, survey inspection center in Coal In Hunan safety check to detect, be 22.0% according to the water ratio that relevant GB (GB/T212-2008, GB/T213-2008, GB/T211-2007, GB474-2008) records, dry base gross calorific value is 24.17MJ/kg, and net calorific value as received basis is 17.25MJ/kg.
Claims (4)
1. a mud dewatering method for high efficiency, low cost, is characterized in that, comprises the following steps:
(1) by weight, in 50-200 part wets mud, add 100 parts of particle diameters is 80-120 object additive, and mix and blend, makes the breakwater agent that water ratio is no more than 20% after filter-press dehydration; Wherein, the component D of the component A of 10-20 part, the B component of 10-20 part, the component C of 10-20 part and 40-70 part is comprised in the additive of 100 parts; Component A is desulfurization brown coal and/or desulfurization bituminous coal; B component is one or more in wood chip, rice husk, hard coal; Component C is scrap tire powder and/or waste mineral oil, and component D is Chinese medicine dreg;
(2) by weight, in 100 parts of wet mud, add 10-30 part breakwater agent, mix and blend, after filter-press dehydration, obtain the dewatered sludge that water ratio is no more than 30%.
2. the method for claim 1, is characterized in that, in the additive of 100 parts, the weight part of described component D is 50-60 part.
3. the method for claim 1, is characterized in that, described filter-press dehydration is belt type filter-pressing dehydration plant.
4. the method for claim 1, is characterized in that, the water ratio of described wet mud is more than 75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886519.9A CN105502884B (en) | 2015-12-07 | 2015-12-07 | A kind of mud dewatering method of high efficiency, low cost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886519.9A CN105502884B (en) | 2015-12-07 | 2015-12-07 | A kind of mud dewatering method of high efficiency, low cost |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105502884A true CN105502884A (en) | 2016-04-20 |
| CN105502884B CN105502884B (en) | 2018-07-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Effective date of registration: 20190514 Address after: 410004 Jia-172, 7th floor, Yannong Complex Building, Dongfanghong District, 459 Lusong Road, Changsha High-tech Development Zone, Changsha City, Hunan Province Patentee after: Changsha Yuanhong Environmental Protection Technology Co., Ltd. Address before: 410004 No. 12 Jingkui Road, Changsha City, Hunan Province, 1 502 Building, Hunan Environmental Protection Research Institute Patentee before: Zhang Liangzhuang |
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