CN100462314C - Sludge fermentation dehydration drying method - Google Patents
Sludge fermentation dehydration drying method Download PDFInfo
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- CN100462314C CN100462314C CNB2007100264118A CN200710026411A CN100462314C CN 100462314 C CN100462314 C CN 100462314C CN B2007100264118 A CNB2007100264118 A CN B2007100264118A CN 200710026411 A CN200710026411 A CN 200710026411A CN 100462314 C CN100462314 C CN 100462314C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The invention discloses a ferment dewater drying method of sludge, which comprises the following steps: inputting sludge with moisture percentage at 90-97% into tempering groove; adding Fe3+ with 0.5-1.5% and Ca2+ or chemical materials to stir and mix 8-16min; tempering evenly; injecting modified sludge into plate filter press; keeping 30-70min at 1.5Mpa-2.5Mpa; descending moisture percentage of sludge to about 55-65%; introducing sludge of being pressed to sludge fermentation tank through band carrier; blowing air through the bottom with volume of blast at 4500-5000m3/h; accelerating speed of fermentation to dry water from sludge. The invention can drop caloric value of sludge.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of sludge fermentation dehydration drying method.
Background technology
Along with China's industrial expansion and process of urbanization, sewage load constantly increases, and the spoil disposal output of water treatment plant increases year by year.The bed mud in municipal drainage ditch or river, city also needs regular dredging for flood passage is unobstructed.These mud become the environmental problem of a sternness gradually.Because the mud that produces in the sewage treatment process, have characteristics such as water ratio height, perishable, foul smelling characteristics such as parasitic ovum and pathogenic micro-organism are arranged.If discharging will cause secondary pollution arbitrarily.Present China most of sludge of sewage treatment plants dehydration back is landfill, throwing sea or agricultural directly.Owing to contain large amount of organic matter in the mud, if rationally utilize, just can turn waste into wealth, become useful material.Though external sludge treatment technology can reach the target of sludge reduction, resource utilization, innoxious, resource utilization, applies to China and all has many problems.The investment of drying and incinerating technology, running cost are very high, exist potential safety hazard in the production process, and the grey material of construction that can only do low price of product burning, effectively do not utilize the nutritive substance that is rich in the mud.Aerobic high-heat composting technology process usually by mud mix modified, aerobic fermentation, operations such as granulation screening composting, supplementary material and product storage are formed, though the higher organic fertilizer of its energy productive value, but this technology floor space is big, the production cycle long, need the interpolation mass filler, and the difficulty of meeting the tendency in the city is bigger.
In recycling sludge comprehensive utilization, utilizing the high heating value of mud to prepare sludge brick is a technology that reliably has market outlook.The operation of making brick from sludge is the mud adding mechanical dehydration of elder generation with water ratio about 90～97%, and moisture percentage in sewage sludge is descended, and then in the stoving oven drying, the last mixing with clay bakes bricks.In whole system sludge brick process, how reducing the dehydration cost is the previous research focus of order, also is an important factor of restriction making brick from sludge technology popularization.In addition, the calorific value height that mud contains the cracking problem can occur if directly bake bricks, and influences the brick product quality.A solution is to add a large amount of clays, to reduce the adobe calorific value.But this scheme can be used a large amount of clays, destroys and ploughs.Another kind of scheme is by stirring, reduces calorific value, but the time that this method is handled is long.
Summary of the invention
The technical problem to be solved in the present invention is the problem place at making brick from sludge process in the prior art, proposes a kind of brand-new low-power consumption sludge dehydrating and drying method, and this method can reduce the calorific value of mud simultaneously in the process of dehydration.
The technical solution adopted in the present invention is, in to modified groove in the process of mud stirring from modified trench bottom air blast blowing air, for the sludge aerobic fermentation provides competent oxygen, this air is taken away the moisture in the mud simultaneously.
This technical scheme realizes by following steps:
A. be that 90～97% mud is imported in the modified groove with water ratio, add then and contain 0.5～1.5% Fe
3+And Ca
2+Or any industrial chemicals wherein, mixed altogether 8～16 minutes, make mud modified evenly;
B. modified good mud is injected plate-and-frame filter press, pressurize 30～70min under the pressure of 1.5MPa～2.5MPa drops to about 55～65% the water ratio of mud;
C. will press filterable mud to introduce in the sludge fermentation groove by travelling belt, regular stirring, air blast is blown air from the bottom in the process of stirring, blast volume 4500～5000m
3/ h accelerates fermenting speed, and this air is taken away the moisture in the mud.
To make water ratio drop to 60% this section institute consumed energy little through adding heat drying for dewatered sludge, and it is mainly removed is free-water in the mud; Same water ratio is also little at the mummification of continuation below 35% consumed energy, and this energy expenditure of two sections is substantially near theoretical value; Mud is the plastic stage of mud between water ratio 35% and 60%, the similar glue of the fluid characteristics of this stage mud, and gluey, thickness are difficult to dispose, and its mummification consumed energy is sharply increased, and are difficult to mummification.Water ratio be between 35 and 60% mummification power consumption be about water ratio 60% or more with 2.5 times of 35% following mummification energy consumption.According to above-mentioned characteristic, dewatered sludge will be avoided the mud plastic stage.Make full use of the sludge drying characteristic, as far as possible at water ratio more than 60% or 35% following mummification.So the present invention adopts pre-mummification technology to mud, the dewatered sludge water ratio is reduced to about 60%, consider the actually operating situation, value 55-65% of the present invention has saved energy consumption so widely.
The present invention gets up sludge dewatering process and sludge fermentation process integration, the air that feeds modified trench bottom provides competent oxygen for the sludge aerobic fermentation, accelerate fermenting speed, the heat that fermenting process produces is used for the oven dry of sludge dewatering, reduces the preparation adobe energy consumption in early stage to the full extent.This method can reduce the calorific value of mud simultaneously in the process of dehydration.
Embodiment
Embodiment 1
Get moisture 80.6% municipal sludge, adding filtrate, to transfer to moisture be 90%; Add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 0.5%, and fully stirring reaction 8min adds the 2# additive then, promptly contains Ca
2+Industrial chemicals, addition are 1.5%, fully stirring reaction 5min.By ram pump the mud that mixes up is injected plate-and-frame filter press, advancing mud pressure is 0.3MPa, when reaching the mud amount, behind pressurize 70min under the pressure about 1.8MPa, so that the moisture in the mud is taken off.After pressurize is finished, the release blowing, the water ratio of mud reaches 57.3%.Mud after the dehydration is stacked by transport tape, stacks 1 day mud internal temperature greatly about 55 ℃.With tilting pot buggy stirring at intermittence, be 12 hours pitch time then.Air that blow the bottom is that its blast volume is 5000m than exsiccant air or unsaturated air during stirring
3/ h, total stacking and stirring time are 7 days.Mix a small amount of flyash during stacking, be used for removing of fermenting process foul smell.The water ratio of final mud drops to 30.1%, and the calorific value of mud drops to 486Kcal/Kg.
Embodiment 2
Get moisture 80.6% municipal sludge, adding filtrate, to transfer to moisture be 96%; Add the 1# additive, promptly contain Fe
3+Industrial chemicals, addition are 1%, fully stirring reaction 15min.By ram pump the mud that mixes up is injected plate-and-frame filter press, advancing mud pressure is 0.4MPa, when reaching the mud amount, behind pressurize 50min under the pressure about 2.0MPa, so that the moisture in the mud is taken off.After pressurize is finished, the release blowing, the water ratio of mud reaches 60.1%.Mud after the dehydration is stacked by transport tape, stacks 1 day mud internal temperature greatly about 58 ℃.With tilting pot buggy stirring at intermittence, be 12 hours pitch time then.Air that blow the bottom is that its blast volume is 4600m than exsiccant air or unsaturated air during stirring
3/ h, total stacking and stirring time are 6 days.Mix a small amount of flyash during stacking, be used for removing of fermenting process foul smell.The water ratio of final mud drops to 31.3%, and the calorific value of mud drops to 517Kcal/Kg.
Embodiment 3
Get moisture 80.6% municipal sludge, adding filtrate, to transfer to moisture be 93%; Add the 2# additive, promptly contain Ca
2+Industrial chemicals, addition are 0.5%, fully stirring reaction 11min.By ram pump the mud that mixes up is injected plate-and-frame filter press, advancing mud pressure is 0.5MPa, when reaching the mud amount, behind pressurize 40min under the pressure about 2.5MPa, so that the moisture in the mud is taken off.After pressurize is finished, the release blowing, the water ratio of mud reaches 63.7%.Mud after the dehydration is stacked by transport tape, stacks 1 day mud internal temperature greatly about 59 ℃.With tilting pot buggy stirring at intermittence, be 11 hours pitch time then.Air that blow the bottom is that its blast volume is 4900m than exsiccant air or unsaturated air during stirring
3/ h, total stacking and stirring time are 7 days.Mix a small amount of flyash during stacking, be used for removing of fermenting process foul smell.The water ratio of final mud drops to 32.7%, and the calorific value of mud drops to 528Kcal/Kg.
Claims (4)
1. a municipal sludge fermentation dehydration drying method is characterized in that, this method realizes by following steps:
A. be that 90～97% mud is imported in the modified groove with water ratio, add then and contain 0.5～1.5% Fe
3+And Ca
2+Or any industrial chemicals wherein, mixed altogether 8～16 minutes, make mud modified evenly;
B. modified good mud is injected plate-and-frame filter press, pressurize 30～70min under the pressure of 1.5MPa～2.5MPa makes the water ratio of mud drop to 55～65%;
C. will press filterable mud to introduce in the sludge fermentation groove by travelling belt, regular stirring, air blast is blown air from the bottom in the process of stirring, blast volume 4500～5000m
3/ h accelerates fermenting speed, and the moisture in the mud is taken away.
2. sludge fermentation dehydration drying method according to claim 1 is characterized in that, by ram pump modified good mud is injected plate-and-frame filter press among the step B, and advancing mud pressure is 0.3～0.5Mpa.
3. sludge fermentation dehydration drying method as claimed in claim 1 or 2, it is characterized in that, mud after moisture is pulled away among the step B is stacked by transport tape, stack 1 day mud internal temperature at 55～60 ℃, then with tilting pot buggy stirring at intermittence, be 10～12 hours pitch time, and the blast volume of bottom is 4700～4800m during stirring
3/ h, total stacking and stirring time are 6～7 days.
4. as sludge fermentation dehydration drying method as described in the claim 3, it is characterized in that mixing a small amount of flyash in the mud stacking process, be used for removing of foul smell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100264118A CN100462314C (en) | 2007-01-19 | 2007-01-19 | Sludge fermentation dehydration drying method |
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| CNB2007100264118A CN100462314C (en) | 2007-01-19 | 2007-01-19 | Sludge fermentation dehydration drying method |
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| CN101007695A CN101007695A (en) | 2007-08-01 |
| CN100462314C true CN100462314C (en) | 2009-02-18 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234841B (en) * | 2008-01-02 | 2011-03-23 | 广州普得环保设备有限公司 | Sludge concentration dehydration method |
| CN101691273B (en) * | 2009-09-28 | 2012-07-04 | 广州普得环保设备有限公司 | Method for integration of thickening, dehydration and aerobic air drying of sewage sludge |
| CN102372407B (en) * | 2010-08-13 | 2013-09-25 | 袁登辉 | Biological drying method of municipal domestic sludge |
| CN102249508B (en) * | 2011-06-02 | 2013-06-05 | 广州科城环保科技有限公司 | Method for comprehensively utilizing sludge in recycling mode |
| CN103626374B (en) * | 2012-08-28 | 2015-12-02 | 北大工学院绍兴技术研究院 | A kind of granulating and drying method for wet mud |
| CN103896475B (en) * | 2014-03-13 | 2015-09-16 | 江苏道科环境科技有限公司 | A kind of Opsonizing method of sludge high-drying dehydration |
| CN105819665B (en) * | 2015-01-07 | 2023-06-16 | 广州正晟科技有限公司 | Sludge drying system and method |
| CN105819652A (en) * | 2015-01-07 | 2016-08-03 | 广州新致晟环保科技机械设备有限公司 | Sludge drying system and sludge drying method |
| CN105132071B (en) * | 2015-08-08 | 2017-09-19 | 广西农垦糖业集团防城精制糖有限公司 | The method of the refined filter mud of sugar refinery of processing |
| CN105057342B (en) * | 2015-09-01 | 2017-09-01 | 钱作虎 | The method that sludge prepares vegetation soil is remained after a kind of metallic iron acidification |
| CN111303957A (en) * | 2020-03-11 | 2020-06-19 | 杨力发 | Biomass fuel based on fly ash and sludge, and preparation method and application thereof |
| CN116375454A (en) * | 2023-04-19 | 2023-07-04 | 安徽龙钰徽派古建工艺制品有限公司 | Method for preparing baked brick from modified fly ash and composite river sludge |
Citations (1)
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| JP2000063188A (en) * | 1998-08-18 | 2000-02-29 | Hitachi Plant Eng & Constr Co Ltd | Device for composting sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000063188A (en) * | 1998-08-18 | 2000-02-29 | Hitachi Plant Eng & Constr Co Ltd | Device for composting sludge |
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Denomination of invention: Sludge fermentation dehydration drying method Effective date of registration: 20121112 Granted publication date: 20090218 Pledgee: Societe Generale Bank, Limited by Share Ltd, Guangzhou branch Pledgor: Guangzhou Pude Environmental Protection Facility Co., Ltd. Registration number: 2012440000001 |
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Date of cancellation: 20130221 Granted publication date: 20090218 Pledgee: Societe Generale Bank, Limited by Share Ltd, Guangzhou branch Pledgor: Guangzhou Pude Environmental Protection Facility Co., Ltd. Registration number: 2012440000001 |
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Owner name: GUANGZHOU XINZHICHENG ENVIRONMENTAL PROTECTION TEC Free format text: FORMER OWNER: GUANGZHOU PUDE ENVIRONMENTAL PROTECTION FACILITY CO., LTD. Effective date: 20130520 |
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Effective date of registration: 20130520 Address after: 510600 Guangzhou, Yuexiu District, Temple Road, the right of the new layer on the ground floor, No. third, No. 90, No. 168 Patentee after: Guangzhou Xinzhicheng Environmental Protection Technology Machinery Equipment Co., Ltd. Address before: 511450, No. 23, martyrs South Road, Guangzhou, Guangdong, four, Yuexiu District Patentee before: Guangzhou Pude Environmental Protection Facility Co., Ltd. |
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Address after: 510098 room 2205, starlight Ying, 119 Shui Yin Road, Yuexiu District, Guangzhou, Guangdong. Patentee after: Guangzhou Xin Zhisheng Environmental Protection Technology Co., Ltd. Address before: 510600 90, shop third, 168 new road, Yuexiu District temple, Guangzhou, Guangdong. Patentee before: Guangzhou Xinzhicheng Environmental Protection Technology Machinery Equipment Co., Ltd. |
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