CN102491614A - Sludge drying treatment method - Google Patents
Sludge drying treatment method Download PDFInfo
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- CN102491614A CN102491614A CN2011103584491A CN201110358449A CN102491614A CN 102491614 A CN102491614 A CN 102491614A CN 2011103584491 A CN2011103584491 A CN 2011103584491A CN 201110358449 A CN201110358449 A CN 201110358449A CN 102491614 A CN102491614 A CN 102491614A
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Abstract
The invention discloses a sludge drying treatment method and is applicable to solid-liquid separation of domestic sewage treated biochemically. Precoating reagent is adopted for precoating treatment to a filter, and the filter is a precoating type vacuum drum filter; sewage is filtered by the filter receiving precoating treatment, so that filter sludge and filter liquor complying with the emission standard can be obtained; the filter sludge is burnt, solid slag and tail gas are produced during burning, and the tail gas is discharged after dust is removed; the solid slag is screened, and part of screened solid slag is used as recycled sludge particles to be used together with commercial precoating reagent for precoating treatment of the filter, and the rest solid slag is discharged as waste slag. By adopting the method, solid contaminant in sewage that is treated biochemically can be separated economically and efficiently so as to obtain filter sewage capable of being discharged directly and filter sludge of which the water content is smaller than 50%, and solid slag obtained after the sludge is burnt can be recycled as precoating reagent.
Description
Technical field
The invention belongs to sewage treatment area, particularly a kind of mud and sludge drying processing method of purifying waste water of separating when handling sewage.
Background technology
It is one of most important process in the city domestic sewage treatment system that the biological chemistry of sewage is handled.The biochemical treatment of sewage is to utilize the vital movement process of mikrobe with the organic matter removal in the sewage.Sewage after biochemical treatment need add flocculation agent and carry out further flocculation treatment, makes the solid pollutant flocculation sediment that suspends in the sewage, adopts thickener thickening, the filtering mode of pressure filter to carry out processed the gained precipitating sludge again.Along with the continuous expansion of city size and the increase of population, the load of municipal sewage plant strengthens rapidly, and every sewage work will discharge sludge quantity every day and reach hundred tons and even ton up to ten thousand, and the disposal of mud also becomes a great problem day by day.
The mud that existing coagulating/flocculating method for processing produces has following characteristics: 1, moisture percentage in sewage sludge is up to 70%～80%, because water ratio is high; Cause mud to be difficult to carry out burning disposal; The stacking floor space is big, and transportation cost is high, and directly landfill method seriously increases the load of landfill yard.2, the content of mikrobe, pathogenic agent is high in the mud, directly uses or throws aside, and easily food chain is polluted.3, mud stench, the objectionable impurities contaminate environment in the mud, during stacking to the airborne release greenhouse gases.Because mud has These characteristics, makes it be different from the solid waste of other type.For a large amount of mud that sewage flocculation treatment produces, China adopts landfill disposal mostly at present, causes the secondary pollution of environment and water body easily.A kind of sludge treatment with low cost, safe and effective, eco-friendly of shortcoming is technological at present, and the processing of mud has become urgent problem.
Summary of the invention
The technical issues that need to address of the present invention provide the drying method for treating of the mud that a kind of sewage produces, and low, the effect stability of its cost has reduced the water ratio of mud, has realized the recycling of resource.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is:
Sludge drying processing method may further comprise the steps:
A, employing precoating paint carry out precoating to filter to be handled, and said filter is a precoating formula vacuum-type drum filter, and precoating paint is commercially available precoating paint or commercially available precoating paint and the mixture that reclaims mud granule;
The filter that the method for b, use step a is carried out after precoating is handled carries out filtration treatment to life or the industrial sewage that under the condition of not adding flocculation agent, after biochemical treatment, produces, and obtains filtering the filtrating of mud and allow compliance with emission standards, and filtrating is discharging directly;
C, the filtration mud among the step b is carried out burning disposal, burn and produce solid slag and tail gas, tail gas discharges after dust removal process;
D, the solid slag that produces among the step c is screened, the part solid slag that filters out is as the recovery mud granule among the step a, and all the other solid slags are discharged as waste residue.
Improvement of the present invention is: said precoating paint is commercially available precoating paint and the mixture that reclaims mud granule, and commercially available precoating paint is 1:0.5 ~ 1:1 with the mass ratio that reclaims mud granule.
Further improvement of the present invention is: the equipment that burning disposal adopts among the step c is fluidized-bed combustion boiler or incinerator, and the temperature of burning disposal is 600 ~ 800 ℃.
Further improvement of the present invention is: the equipment that screening is adopted in the steps d is for revolving the sieve that shakes, and the diameter that reclaims mud granule is 9 ~ 11 μ m.
Commercially available precoating paint according to the invention is one or both the mixture in zeyssatite, the perlite.
Further improvement of the present invention is: the tail gas among the step c after the dust removal process is used for heat energy recycle.
Further improvement of the present invention is: the waste residue as fertilizer sources in the steps d is recycled.
Because the technical progress of having adopted technique scheme, the present invention to obtain is:
The present invention adopts precoating formula vacuum-type drum filter that the sewage through biochemical treatment is filtered, and can effectively remove the solid pollutant in the sewage, filters the rear filtrate allow compliance with emission standards, can directly discharge.In the sewage after the conventional flocculation treatment, solid pollutant and flocculation agent form colloidal structure, cause the precipitating sludge water ratio of conventional processing mode higher.Compare with the coagulating/flocculating method for processing of routine; Method of the present invention does not adopt flocculation agent, has avoided the pollutent colloidal to form, and can significantly reduce the water ratio of mud; The sludge moisture content that filters gained is 40 ~ 50%, has greatly practiced thrift the energy consumption and the working cost of sludge dewatering treatment.
Method of the present invention need not add the flocculation medicament, practices thrift cost, has reduced the influence of flocculation agent to environment simultaneously, environmental protection.The reduction of moisture percentage in sewage sludge makes sludge volume reduce, thus shared land area when having reduced landfill disposal, and the pollution to environment and groundwater resource that can avoid the direct landfill of the high mud of water cut to cause; In addition, lower water ratio makes the mud of method generation of the present invention be suitable for carrying out burning disposal.
Sludge incineration is a kind of processing mode of sewage sludge harmlessness efficiently, and can produce the heat energy of recyclable utilization.After the mud that treatment process of the present invention produces can mix with municipal garbage, can be used as fuel and supply power station or other energy recovery to use, further promoted economic benefit.
When commercially available precoating paint and the mass ratio that reclaims mud granule are 1:0.5 ~ 1:1, have good coating and filter effect, solid insoluble content is lower than 100mg/L in the filtrating that obtains, allow compliance with emission standards, moisture percentage in sewage sludge is low, is suitable for follow-up burning disposal.Adopt fluidized-bed combustion boiler or incinerator that mud is carried out burning disposal, utilization ratio is high, and heat production is high, and when the burning disposal temperature was 600 ~ 800 ℃, the pellet hardness, the granularity that obtain were moderate, and the recovery is high, can practice thrift the cost of filtration treatment effectively.Select for use the material that revolves after the sieve that shakes burns the present invention to carry out Screening Treatment, good separating effect; When the diameter that reclaims mud granule is 9 ~ 11 μ m, have good consistency with commercially available precoating paint, be applicable to that the precoating of vacuum-type drum filter is handled.Zeyssatite, perlite have good consistency as preferred commercially available precoating paint with recovery mud granule of the present invention, and filter effect is good.
Produce solid slag after the sludge incineration, wherein contain the different solid particulate of granularity and hardness.After above-mentioned particle screened, the part particle can be used for the precoating paint of precoating formula vacuum-type drum filter, has realized the recycling of precoating paint, has practiced thrift processing cost.Screen remaining particle as waste residue, can carry out harmless treatments such as landfill; Perhaps utilize a large amount of N, P, K and organic matter etc. contained in the waste residue, after the waste residue as fertilizer sources is improved, be used for agriculture prodn, realized the recycling of waste residue.
Description of drawings
Fig. 1 is the process flow sheet of treatment process of the present invention.
Embodiment
Below in conjunction with specific embodiments the present invention is explained further details:
Sewage among the following embodiment is the sewage after biochemical treatment of municipal sewage plant's discharging.
Embodiment 1
Adopting zeyssatite as precoating paint vacuum-type drum filter to be carried out precoating handles.
The filter that uses above-mentioned precoating to dispose carries out filtration treatment to above-mentioned sewage after biochemical treatment, obtains filtrating and filters mud.Measure solid insoluble content in the filtrating, the result is 30mg/L.Gained filtrating allow compliance with emission standards, directly discharging.
Above-mentioned filtration is obtained mud carry out burning disposal.Incinerator is an incinerator, and temperature is 600 ~ 800 ℃, produces the tail gas of solid slag and Gao Re in the burning process, and tail gas discharges after dust removal process.
The screen device that shakes is revolved in employing, and the solid slag that above-mentioned burning process is produced carries out Screening Treatment, and the solid slag that filters out particle diameter and be 9 ~ 11 μ m is as reclaiming mud granule, and the precoating that is used for filter is handled; All the other solid slags are made landfill disposal as waste residue.
Embodiment 2
Adopt zeyssatite and perlite mass ratio be the mixture of 1:1 as commercially available precoating paint, after mixing with recovery particle among the embodiment 1, vacuum-type drum filter is carried out the precoating processing as precoating paint.Commercially available precoating paint is 1:0.5 with reclaiming the particulate mass ratio.
The filter that uses above-mentioned precoating to dispose carries out filtration treatment to above-mentioned sewage after biochemical treatment, obtains filtrating and filters mud.Measure the content of solid insoluble in the filtrating, the result is 60mg/L.Gained filtrating allow compliance with emission standards, directly discharging.
Above-mentioned filtration is obtained mud be transported to heat power plant, and carry out burning disposal after municipal garbage mixes.Incinerator is a fluidized-bed combustion boiler, and temperature is 700 ℃, produces the tail gas of solid slag and Gao Re in the burning process, and tail gas provides the energy for the power generation system of heat power plant after dust removal process.
The solid slag that above-mentioned burning process is produced carries out Screening Treatment, adopts to revolve the screen device that shakes, and the solid slag that filters out particle diameter and be 9.5 ~ 10.5 μ m is as reclaiming mud granule, and the precoating that is used for filter is handled; All the other solid slags are used for fertilizer processing as waste residue.
Embodiment 3
The difference of present embodiment and embodiment 2 is: adopt perlite as commercially available precoating paint, commercially available precoating paint is 1:1 with reclaiming the particulate mass ratio.The content of solid insoluble is 95mg/L in the filtrating.The sludge incineration temperature is 600 ~ 800 ℃.The solid slag that filters out 9 ~ 11 μ m is as reclaiming mud granule, and circulation is used for precoating and handles.
Claims (7)
1. sludge drying processing method is characterized in that:
A, employing precoating paint carry out precoating to filter to be handled, and said filter is a precoating formula vacuum-type drum filter, and precoating paint is commercially available precoating paint or commercially available precoating paint and the mixture that reclaims mud granule;
The filter that the method for b, use step a is carried out after precoating is handled carries out filtration treatment to life or the industrial sewage that under the condition of not adding flocculation agent, after biochemical treatment, produces, and obtains filtering the filtrating of mud and allow compliance with emission standards, and filtrating is discharging directly;
C, the filtration mud among the step b is carried out burning disposal, burn and produce solid slag and tail gas, tail gas discharges after dust removal process;
D, the solid slag that produces among the step c is screened, the part solid slag that filters out is as the recovery mud granule among the step a, and all the other solid slags are discharged as waste residue.
2. sludge drying processing method according to claim 1 is characterized in that: said precoating paint is commercially available precoating paint and the mixture that reclaims mud granule, and commercially available precoating paint is 1:0.5 ~ 1:1 with the mass ratio that reclaims mud granule.
3. sludge drying processing method according to claim 2 is characterized in that: the equipment that burning disposal adopts among the step c is fluidized-bed combustion boiler or incinerator, and the temperature of burning disposal is 600 ~ 800 ℃.
4. sludge drying processing method according to claim 3 is characterized in that: the equipment that screening is adopted in the steps d is for revolving the sieve that shakes, and the diameter that reclaims mud granule is 9 ~ 11 μ m.
5. according to each described sludge drying processing method in the claim 1 ~ 4, it is characterized in that: said commercially available precoating paint is one or both the mixture in zeyssatite, the perlite.
6. sludge drying processing method according to claim 5 is characterized in that: the tail gas among the step c after the dust removal process is used for heat energy recycle.
7. sludge drying processing method according to claim 6 is characterized in that: the waste residue as fertilizer sources in the steps d is recycled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103584491A CN102491614A (en) | 2011-11-14 | 2011-11-14 | Sludge drying treatment method |
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| CN2011103584491A CN102491614A (en) | 2011-11-14 | 2011-11-14 | Sludge drying treatment method |
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| CN102491614A true CN102491614A (en) | 2012-06-13 |
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Citations (6)
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| CN1609004A (en) * | 2003-10-17 | 2005-04-27 | 鞍山科技大学 | Process of producing iron oxide red with waste iron ore slime |
| JP3677461B2 (en) * | 2001-04-24 | 2005-08-03 | 株式会社 日立インダストリイズ | Sludge dewatering method and sludge dewatering device |
| CN101049600A (en) * | 2006-04-04 | 2007-10-10 | 天津泰达环保有限公司 | Recycling method for using dregs of incinerator for municipal garbage |
| CN101290121A (en) * | 2007-04-18 | 2008-10-22 | 深圳市环源科技发展有限公司 | Wet sludge anhydration burning processing system and process |
| JP2011041923A (en) * | 2009-08-24 | 2011-03-03 | Fujita Corp | Solid-liquid separator and solid-liquid separation method by precoat rotary drum |
| CN102190400A (en) * | 2010-03-10 | 2011-09-21 | 湖州南太湖环保能源有限公司 | Method for applying integrated technology of combination of membrane biochemistry and nanofiltration membrane to high-density leachate advanced treatment and recycling |
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2011
- 2011-11-14 CN CN2011103584491A patent/CN102491614A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3677461B2 (en) * | 2001-04-24 | 2005-08-03 | 株式会社 日立インダストリイズ | Sludge dewatering method and sludge dewatering device |
| CN1609004A (en) * | 2003-10-17 | 2005-04-27 | 鞍山科技大学 | Process of producing iron oxide red with waste iron ore slime |
| CN101049600A (en) * | 2006-04-04 | 2007-10-10 | 天津泰达环保有限公司 | Recycling method for using dregs of incinerator for municipal garbage |
| CN101290121A (en) * | 2007-04-18 | 2008-10-22 | 深圳市环源科技发展有限公司 | Wet sludge anhydration burning processing system and process |
| JP2011041923A (en) * | 2009-08-24 | 2011-03-03 | Fujita Corp | Solid-liquid separator and solid-liquid separation method by precoat rotary drum |
| CN102190400A (en) * | 2010-03-10 | 2011-09-21 | 湖州南太湖环保能源有限公司 | Method for applying integrated technology of combination of membrane biochemistry and nanofiltration membrane to high-density leachate advanced treatment and recycling |
Non-Patent Citations (1)
| Title |
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| 唐立夫等: "《过滤机》", 30 June 1984, 机械工业出版社 * |
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Application publication date: 20120613 |