CN104591515A - Sludge drying treatment method and treatment apparatus thereof - Google Patents
Sludge drying treatment method and treatment apparatus thereof Download PDFInfo
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- CN104591515A CN104591515A CN201310537802.1A CN201310537802A CN104591515A CN 104591515 A CN104591515 A CN 104591515A CN 201310537802 A CN201310537802 A CN 201310537802A CN 104591515 A CN104591515 A CN 104591515A
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- mud
- sludge
- metering
- lime
- mixing device
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- 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
- C02F11/123—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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (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 belongs to the technical field of environmental protection, and concretely relates to a sludge drying treatment apparatus and a treatment method thereof. A technical scheme adopted in the invention is characterized in that the sludge drying treatment apparatus includes a sludge metering conveyor, a quicklime metering feeding device, a mixing device and a filter press; and the sludge metering conveyor and the quicklime metering feeding device are connected with the feeding hole of the mixing device, and the discharging hole of the mixing device is connected with the filter press. The apparatus and the method have the advantages of great reduction of the quicklime dosage, real reduction of sludge, small land occupation, low running consumption of drugs, and great reduction of the running cost.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of sludge desiccation processing equipment and treatment process.
Background technology
Along with municipal sewage treatment Facilities Construction progressively raise speed and wastewater reuse approach rate day by day improve, the mud generation sharp increase of sewage work.According to phone predicts, China's municipal effluent amount also has in next two decades and increases substantially, and within 2010, quantity of wastewater effluent will reach 440 × 108m
3/ d; The year two thousand twenty quantity of wastewater effluent reaches 536 × 108m
3/ d; Sludge quantity usually accounts for 0.3% ~ 0.5% (volume) of sewage quantity or is about 1% ~ 2% (quality) of sewage load.And if carry out advanced treatment again to sewage, sludge quantity also can increase by 0.5 ~ 1 times.Current wastewater treatment in China amount and processing rate not high (4.5%), and municipal sewage plant discharges about 9,000,000 tons of mud every year, but also with every year about 10% speed increment.The severe situation of sewage sludge harmlessness process the is delayed greatly paces of China environmental protection and improvement, cause showing great attention to of government and relevant departments.
Country " 12 " planning, China will increase day by day sewage treatment capacity 4,500 ten thousand tons, and centralized treatment of urban sewage rate reaches 70%, and China's mud generation is also unprecedented soaring.And municipal sludge has, and capacity is large, unstable, the easy feature such as corruption, foul smelling, poisonous and harmful, not process or the mishandling pollutent that will cause invades the serious secondary pollution accident such as underground water, foul gas erosion air.
At present, what deeply dehydrating sludge majority adopted is lime mummification dehydration technique: this technology is applicable to reconstruction and built Sewage Plant, enter mud water ratio about 80%, mud by with the abundant hybrid reaction of lime after, water ratio drops to about 70%, enter sludge drying bed afterwards again and carry out airing stacking, after stacking 3 days, water ratio drops to less than 60%, transports outward disposal more afterwards.
This technology is a large amount of soil because needs take, and the sludge treatment cycle is long, and causes mud not have minimizing because adding lime ratio up to 30% (namely often process the mud of 1 ton of water ratio 80%, need to add 300 kilograms of unslaked limes).Therefore, a set of technology being applicable to built/reconstruction sewage work of exploitation is badly in need of.
Concrete manifestation:
1, Lime-Injecting amount is high: the mud often processing 1 ton of water ratio 80%, needs to add 300 kilograms of unslaked limes.Be equivalent to process 1 ton of over dry mud and must increase by 1.5 tons of lime;
Its reaction mechanism:
By mud and microlith ash Homogeneous phase mixing, the moisture contained by lime and mud occurs to react as follows:
1kgCaO+0.32kgH2O->1.32kgCa(OH)2+1177kJ
According to this reaction, the calcium oxide often adding 1 kilogram has the water of 0.32 to be combined into calcium hydroxide, reacts the water that the heat generated can evaporate about 0.5 kilogram.After unslaked lime and water react and produces calcium hydroxide, can continue to occur with other materials in mud further to react, the reaction as resultant calcium hydroxide and CO2:
1.32kgCa(OH)2+0.78kgCO2->1.78kgCaCO3+0.32kgH2O+2212kJ
The total amount of this reaction meeting further increase solids, a part of water of heating evaporation, and then increase processes the solid content of rear mud.
2, mud increment instead of decrement: to process 1 ton of over dry mud, before process, water ratio is 80%, its volume V1=5 ton, after process, water ratio is 60%, because adding 1.5 tons of unslaked limes, therefore its volume V2=6.25 ton, add 1.25 tons before the mud weight ratio process namely after process;
3, project is taken up an area large: the mud after lime with the hybrid reaction of mud, and its moisture percentage in sewage sludge is general all about 70%, does not also reach the index of less than 60% of national standard requirement.Therefore mud after treatment all needs to carry out banking up airing in a specific region, bank up about 3 days airing time, therefore floor space is too large.Because lime mummification method is generally that generally can not reserve too many project land used in most Sewage Plant, therefore this technique is restricted based on reconstruction and built Sewage Plant always.
4, run medicine consumption high: unslaked lime market price about 500 yuan/ton, then running medicine consumption is 750 yuan/ton (in over dry mud);
Summary of the invention
The object of the present invention is to provide a kind of place, economical operation, the sludge desiccation processing equipment that mummification is effective.
In order to achieve the above object, the technical solution adopted in the present invention is:
Sludge desiccation processing equipment, comprises mud metering and conveying device, Quick lime metering throwing device, mixing device, filter-pressing device; Described mud metering and conveying device, Quick lime metering throwing device are connected with the dog-house of mixing device, and the discharge port of described mixing device is connected with filter-pressing device.
This device also comprises unslaked lime storing and conveying device, dewatered sludge e Foerderanlage; Described unslaked lime storing and conveying device is connected with Quick lime metering throwing device, and described filter-pressing device is connected with dewatered sludge e Foerderanlage.
Described mud metering and conveying device is worm conveyor of weighing, described mixing device is continuous discharge formula colter mixer, described Quick lime metering throwing device is the screw feeder with accurate measuring device, described filter-pressing device is belt filter press, and described belt filter press has low pressure area that pressure is 5MP, the middle nip of 10MP and the high pressure area of 15MP.
Described unslaked lime storing and conveying device comprises feed bin and unslaked lime conveying belt, and described change sludge conveyer is endless belt conveyor.
Another object of the present invention is to provide a kind of described sludge desiccation processing equipment to carry out sludge drying processing method.
In order to achieve the above object, the technical solution adopted in the present invention comprises the following steps:
A) mud of pre-mummification is delivered to mixing device after metering by mud metering and conveying device, unslaked lime is delivered to mixing device after Quick lime metering throwing device is weighed simultaneously;
B) mud and unslaked lime mix in mixing device, obtain mixture;
C) by step b) mixture that obtains adds filter-pressing device press filtration, both completed sludge drying treating processes;
Described sludge moisture content is 70% ~ 85%, and described mud and Lime Quality are than being 1:0.1 ~ 0.2;
The pressure of described press filtration is 5MP ~ 15MP.
Described mud metering and conveying device is worm conveyor of weighing, described mixing device is continuous discharge formula colter mixer, described Quick lime metering throwing device is the screw feeder with accurate measuring device, described filter-pressing device is belt filter press, and described belt filter press has low pressure area that pressure is 5MP, the middle nip of 10MP and the high pressure area of 15MP.
Described water content is that after the treated process of mud of 70% ~ 85%, water content is less than 60%.
Described sludge moisture content is 80%, and mud described in described unslaked lime and Lime Quality are than being 1:0.15;
Described sludge drying processing method, preferably comprises the following steps:
I) mud of pre-mummification is delivered to continuous discharge formula colter mixer after metering by worm conveyor of weighing, unslaked lime is delivered to continuous discharge formula colter mixer after weighing with the screw feeder of accurate measuring device simultaneously;
II) mud and unslaked lime mix in continuous discharge formula colter mixer, obtain mixture;
III) by step b) mixture that obtains enters belt filter press press filtration continuously, and be three sections, the high pressure area press filtration of nip and 15MP in the low pressure area of 5MP, 10MP through pressure, both completed sludge drying treating processes;
Described sludge moisture content is preferably 80%, and described mud and Lime Quality are than being preferably 1:0.15.
Technical solution of the present invention principle is:
First be that mud and unslaked lime enter mixing device, the fluidized-bed that mixing effect is formed just impels the moisture generation thermopositive reaction in unslaked lime and mud.The follow-up mud of continuous input can enter in the fluidized-bed be preheated, and just meet with the product of reaction in intake zone, unslaked lime contacts with the mud of bigger serface rapidly, react, heat release, ensure the fastest mixing and reaction, the heat generated is high efficiency by the air heating in mixing device, accelerate the evaporation of moisture, the material after hybrid reaction is discharged in bottom.
Then the mixture after high efficient mixed enters filter-pressing device again.Can be different according to sludge quality, be divided into 3 nips, low pressure area pressure 5MPa, high nip pressures 10MPa, high nip pressures 15MPa; By the progressively extruding of three sections, the moisture percentage in sewage sludge after process can reach less than 60%, meets national sludge treatment index of correlation.
Beneficial effect of the present invention is:
A, unslaked lime dosage greatly reduce: lime mummification method utilizes unslaked lime to be combined the heat produced with mud, and by the process of mud progressively evaporate to dryness, therefore Lime-Injecting amount is high.This technique only adds a small amount of lime, often processes the mud of 1 ton of water ratio 80%, needs to add 30 kilograms of unslaked limes.Be equivalent to process 1 ton of over dry mud and must increase by 0.15 ton of lime;
The minimizing of the real meaning of B, mud: to process 1 ton of over dry mud, before process, water ratio is 80%, its mass M 1=5 ton; After process, water ratio is 60%, because adding 0.15 ton of unslaked lime, therefore its mass M 2=2.875 ton, decrease 2.125 tons before the mud weight ratio process namely after process;
C, project are taken up an area little: the mud after the hybrid reaction of lime and mud, directly enter extraordinary pressure filter and carry out extrusion process, moisture percentage in sewage sludge after process directly drops to less than 60%, only needs the floor space of 1 equipment, and floor space is much smaller than lime mummification method.
D, operation medicine consumption are low: unslaked lime market price about 500 yuan/ton, then running medicine consumption is 75 yuan/ton (in over dry mud), and run medicine and consume 10% of only lime mummification method, working cost reduces greatly.
Accompanying drawing explanation
Fig. 1 is the structural representation of sludge desiccation processing equipment of the present invention.
Embodiment
Further illustrate below in conjunction with accompanying drawing dialogue invention technical scheme.
Embodiment 1
As shown in Figure 1:
Sludge desiccation processing equipment, comprises mud metering and conveying device 1, Quick lime metering throwing device 2, mixing device 3, filter-pressing device 4; Described mud metering and conveying device 1, Quick lime metering throwing device 2 are connected with the dog-house of mixing device 3, and the discharge port of described mixing device 3 is connected with filter-pressing device 4.
This device also comprises unslaked lime storing and conveying device 5, dewatered sludge e Foerderanlage 6; Described unslaked lime storing and conveying device 5 is connected with Quick lime metering throwing device 2, and described filter-pressing device 4 is connected with dewatered sludge e Foerderanlage 6.
Described mud metering and conveying device 1 is worm conveyor of weighing, described mixing device 3 is continuous discharge formula colter mixer, described Quick lime metering throwing device 2 is the screw feeder with accurate measuring device, described filter-pressing device 4 is belt filter press, and described belt filter press has low pressure area that pressure is 5MP, the middle nip of 10MP and the high pressure area of 15MP.
Described unslaked lime storing and conveying device 5 comprises feed bin and unslaked lime conveying belt, and described change sludge conveyer 6 is endless belt conveyor.
Another object of the present invention is to provide a kind of described sludge desiccation processing equipment to carry out sludge drying processing method.
Embodiment 2
Sludge drying treatment technology scheme of the present invention comprises the following steps:
A) mud of pre-mummification is delivered to mixing device 3 after metering by mud metering and conveying device 1, unslaked lime is delivered to mixing device 3 after Quick lime metering throwing device 2 is weighed simultaneously;
B) mud and unslaked lime mix in mixing device 3, obtain mixture;
C) by step b) mixture that obtains adds filter-pressing device 4 press filtration, both completed sludge drying treating processes;
Described sludge moisture content is 70% ~ 85%, and described mud and Lime Quality are than being 1:0.1 ~ 0.2;
The pressure of described press filtration is 5MP ~ 15MP.
Described mud metering and conveying device 1 is worm conveyor of weighing, described mixing device 3 is continuous discharge formula colter mixer, described Quick lime metering throwing device 2 is the screw feeder with accurate measuring device, described filter-pressing device 4 is belt filter press, and described belt filter press has low pressure area that pressure is 5MP, the middle nip of 10MP and the high pressure area of 15MP.
Described water content is that after the treated process of mud of 70% ~ 85%, water content is less than 60%.
Described sludge moisture content is preferably 80%, and mud described in described unslaked lime and Lime Quality are than being preferably 1:0.15;
Technical solution of the present invention principle is:
First be that mud and unslaked lime enter mixing device, the fluidized-bed that mixing effect is formed just impels the moisture generation thermopositive reaction in unslaked lime and mud.The follow-up mud of continuous input can enter in the fluidized-bed be preheated, and just meet with the product of reaction in intake zone, unslaked lime contacts with the mud of bigger serface rapidly, react, heat release, ensure the fastest mixing and reaction, the heat generated is high efficiency by the air heating in mixing device, accelerate the evaporation of moisture, the material after hybrid reaction is discharged in bottom.
Then the mixture after high efficient mixed enters filter-pressing device again.Can be different according to sludge quality, be divided into 3 nips, low pressure area pressure 5MPa, high nip pressures 10MPa, high nip pressures 15MPa; By the progressively extruding of three sections, the moisture percentage in sewage sludge after process can reach less than 60%, meets national sludge treatment index of correlation.
Claims (9)
1. sludge desiccation processing equipment, is characterized in that: comprise mud metering and conveying device, Quick lime metering throwing device, mixing device, filter-pressing device; Described mud metering and conveying device, Quick lime metering throwing device are connected with the dog-house of mixing device, and the discharge port of described mixing device is connected with filter-pressing device.
2. sludge desiccation processing equipment as claimed in claim 1, is characterized in that: this device also comprises unslaked lime storing and conveying device, dewatered sludge e Foerderanlage; Described unslaked lime storing and conveying device is connected with Quick lime metering throwing device, and described filter-pressing device is connected with dewatered sludge e Foerderanlage.
3. sludge desiccation processing equipment as claimed in claim 1, it is characterized in that: described mud metering and conveying device is worm conveyor of weighing, described mixing device is continuous discharge formula colter mixer, described Quick lime metering throwing device is the screw feeder with accurate measuring device, described filter-pressing device is belt filter press, and described belt filter press has low pressure area that pressure is 5MP, the middle nip of 10MP and the high pressure area of 15MP.
4. sludge desiccation processing equipment as claimed in claim 2, it is characterized in that: described unslaked lime storing and conveying device comprises feed bin and unslaked lime conveying belt, described change sludge conveyer is endless belt conveyor.
5. carry out a sludge drying processing method with the sludge desiccation processing equipment as described in right 1, it is characterized in that comprising the following steps:
A) mud of pre-mummification is delivered to mixing device after metering by mud metering and conveying device, unslaked lime is delivered to mixing device after Quick lime metering throwing device is weighed simultaneously;
B) mud and unslaked lime mix in mixing device, obtain mixture;
C) by step b) mixture that obtains adds filter-pressing device press filtration, both completed sludge drying treating processes;
Described sludge moisture content is 70% ~ 85%, and described mud and Lime Quality are than being 1:0.1 ~ 0.2;
The pressure of described press filtration is 5MP ~ 15MP.
6. sludge drying processing method as claimed in claim 5, it is characterized in that: described mud metering and conveying device is worm conveyor of weighing, described mixing device is continuous discharge formula colter mixer, described Quick lime metering throwing device is the screw feeder with accurate measuring device, described filter-pressing device is belt filter press, and described belt filter press has low pressure area that pressure is 5MP, the middle nip of 10MP and the high pressure area of 15MP.
7. sludge drying processing method as claimed in claim 5, is characterized in that: described water content is that after the treated process of mud of 70% ~ 85%, water content is less than 60%.
8. sludge drying processing method as claimed in claim 5, is characterized in that: described sludge moisture content is 80%, and mud described in described unslaked lime and Lime Quality are than being 1:0.15.
9. sludge drying processing method as claimed in claim 6, is characterized in that comprising the following steps:
I) mud of pre-mummification is delivered to continuous discharge formula colter mixer after metering by worm conveyor of weighing, unslaked lime is delivered to continuous discharge formula colter mixer after weighing with the screw feeder of accurate measuring device simultaneously;
II) mud and unslaked lime mix in continuous discharge formula colter mixer, obtain mixture;
III) by step b) mixture that obtains enters belt filter press press filtration continuously, and be three sections, the high pressure area press filtration of nip and 15MP in the low pressure area of 5MP, 10MP through pressure, both completed sludge drying treating processes;
Described sludge moisture content is 80%, and described mud and Lime Quality are than being 1:0.15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310537802.1A CN104591515A (en) | 2013-10-30 | 2013-10-30 | Sludge drying treatment method and treatment apparatus thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310537802.1A CN104591515A (en) | 2013-10-30 | 2013-10-30 | Sludge drying treatment method and treatment apparatus thereof |
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| CN104591515A true CN104591515A (en) | 2015-05-06 |
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| CN201310537802.1A Pending CN104591515A (en) | 2013-10-30 | 2013-10-30 | Sludge drying treatment method and treatment apparatus thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219920A (en) * | 2016-08-30 | 2016-12-14 | 江苏聚业机械装备股份有限公司 | Solid waste environmental protection treatment integration apparatus and fixed-end forces method thereof |
| CN108249719A (en) * | 2018-03-12 | 2018-07-06 | 宜兴市凯利达环保设备有限公司 | Deep sludge dewatering process |
| CN114247364A (en) * | 2021-11-24 | 2022-03-29 | 浙江海元环境科技有限公司 | Movable adding device and method for keeping fluidity of anaerobic granular sludge |
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| CN102229464A (en) * | 2011-06-02 | 2011-11-02 | 杭州中威净水材料有限公司 | Preparation and method for drying sludge through deep dehydrating |
| CN102320080A (en) * | 2011-06-16 | 2012-01-18 | 温州圣平泥浆固化有限公司 | Deep dewatering, solidifying and brick making device for municipal domestic sludge and building pile sludge and processing method thereof |
| CN203513457U (en) * | 2013-10-30 | 2014-04-02 | 杭州楚天科技有限公司 | Sludge drying treatment device |
-
2013
- 2013-10-30 CN CN201310537802.1A patent/CN104591515A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229464A (en) * | 2011-06-02 | 2011-11-02 | 杭州中威净水材料有限公司 | Preparation and method for drying sludge through deep dehydrating |
| CN102320080A (en) * | 2011-06-16 | 2012-01-18 | 温州圣平泥浆固化有限公司 | Deep dewatering, solidifying and brick making device for municipal domestic sludge and building pile sludge and processing method thereof |
| CN203513457U (en) * | 2013-10-30 | 2014-04-02 | 杭州楚天科技有限公司 | Sludge drying treatment device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106219920A (en) * | 2016-08-30 | 2016-12-14 | 江苏聚业机械装备股份有限公司 | Solid waste environmental protection treatment integration apparatus and fixed-end forces method thereof |
| CN108249719A (en) * | 2018-03-12 | 2018-07-06 | 宜兴市凯利达环保设备有限公司 | Deep sludge dewatering process |
| CN114247364A (en) * | 2021-11-24 | 2022-03-29 | 浙江海元环境科技有限公司 | Movable adding device and method for keeping fluidity of anaerobic granular sludge |
| CN114247364B (en) * | 2021-11-24 | 2023-09-05 | 浙江海元环境科技有限公司 | Movable feeding device and method for keeping fluidity of anaerobic granular sludge |
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Application publication date: 20150506 |