CN104761111A - Preparation method of rice husk powder conditioning sludge incineration slag and method for conditioning urban sludge - Google Patents
Preparation method of rice husk powder conditioning sludge incineration slag and method for conditioning urban sludge Download PDFInfo
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- CN104761111A CN104761111A CN201510175023.0A CN201510175023A CN104761111A CN 104761111 A CN104761111 A CN 104761111A CN 201510175023 A CN201510175023 A CN 201510175023A CN 104761111 A CN104761111 A CN 104761111A
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Abstract
The invention discloses a preparation method of rice husk powder conditioning sludge incineration slag and a method for conditioning urban sludge and belongs to the technical field of environmental governance. The method comprises the following steps: dosing a certain amount of rice husk powder and iron chloride into a certain amount of urban sludge according to a certain dosing sequence and stirring speed; filtering and dehydrating the sludge after conditioning to obtain a sludge cake; incinerating the sludge cake at a certain temperature for a certain time to prepare the rice husk powder conditioning sludge incineration slag; and conditioning the urban sludge by using the prepared rice husk powder conditioning sludge incineration slag to improve the dehydration performance. By adopting the preparation method of the rice husk powder conditioning sludge incineration slag, disclosed by the invention, preparation time and energy consumption are effectively saved; and meanwhile, the rice husk powder conditioning sludge incineration slag can obviously improve the dehydration performance of the sludge, and the water content in the dehydrated sludge cake reaches 70-75%. The preparation method disclosed by the invention has the advantages of low cost and simple process, and has important significance for solving environmental pollution and promoting the treatment of wastes by other wastes.
Description
Technical field
The invention belongs to technical field of environmental management, particularly after a kind of powdered rice hulls conditioning, sludge incineration slag is prepared and nurses one's health the method for municipal sludge.
Background technology
Municipal sludge, because output is high, volume is large, character is complicated and there is harm to environment and human health, therefore must carry out process disposal to it.The most significant feature of mud is that to have high-moisture (can reach more than 99%), flocculation structure loose and in flow state, for the long distance delivery of mud and subsequent disposal bring economically with technical difficulty, therefore effectively dehydration is the key of sludge treatment.But excess sludge is as a kind of high-ductility fluid, and compressibility extreme difference, after Direct Dehydration, moisture percentage in sewage sludge is still more than 90%.Sludge conditioning is by improving dewatering performance of sludge, and promoting sludge dewatering, for mud subsequent disposal and utilization lay the foundation, is the study hotspot of domestic and international lasting for years.
Urban sludge conditioning processing method is a lot, can be divided into Physical, chemical method and biological process three major types substantially.Chemical conditioning in sludge conditioning method because having stronger suitability to the change of sludge quantity and sludge quality, and easy and simple to handle, effective, treatment cycle is short, investment working cost is low etc. and be used widely.Add on the basis of specified chemical amendment (iron(ic) chloride, cationic polyacrylamide etc.) in mud, add some inorganic or organic granulars again, if brown coal, flyash, wood sawdust etc. are as skeleton, these particles make mud flco more lastingly closely knit, are conducive to the mud forming easily dehydration; These skeletons can make sludge cake keep porousness simultaneously, and what form water goes out circulation road, and stops flco to collapse, and reduce the compressibility of mud cake, thus improve the dewatering of mud.Therefore the sludge conditioner that development of new is efficient, safe, economic and skeleton thing are sludge dewatering research emphasis.
At present, utilize the research of sludge incineration slag conditioning mud less, the people such as Luo Haijian have studied the impact of slag at the bottom of sludge incineration on industrial sludge dewatering, and result shows that sludge incineration slag improves the dewatering of industrial sludge to a certain extent.Existing research all adopts primary sludge bottom ash to study, because primary sludge dewatering is poor, mud drying time is longer, Energy Consumption Cost is higher, simultaneously, primary sludge calorific value is lower, sludge incineration needs to consume certain ignition dope, and therefore the preparation of primary sludge incineration slag needs higher fund and time to drop into.What this patent proposed utilizes powdered rice hulls to combine the method for inorganic flocculating agent iron(ic) chloride conditioning primary sludge, effectively can improve dewatering performance of sludge, save mud drying time, simultaneously because the powdered rice hulls composition nursed one's health in rear mud can serve as the ignition dope of sludge incineration, greatly can reduce cost and the energy consumption of sludge incineration, thus realize the object of the treatment of wastes with processes of wastes against one another, save energy, for after rice husk and conditioning, the recycling of mud provides new outlet, there is the benefit of good economy, society and environment.
Summary of the invention
Technical problem to be solved by this invention is: overcome the deficiency in existing sludge conditioning technology, the conditioning sludge incineration slag preparation providing a kind of technique simple, with low cost, respond well and the method for conditioning municipal sludge thereof.
For achieving the above object, the present invention is by the following technical solutions:
The preparation method of a kind of powdered rice hulls conditioning sludge incineration slag provided by the invention, described sludge conditioner adopts burning method preparation, comprises the following steps:
(1) get a certain amount of primary sludge, add the powdered rice hulls of 65%-70% mud dry weight, stir 20-40s with 250-350rpm;
(2) under the agitation condition of 40-60rpm, in above-mentioned mud, continue the iron(ic) chloride adding 115.07-138.09g/kg mud dry weight, stir 2-4min;
(3) by the sludge filtration dehydration after above-mentioned conditioning, the sludge cake obtained is dried at 100-120 DEG C;
(4) sludge cake after oven dry is burned 1-3h at 350-450 DEG C;
(5) sieving milling after the residual solids naturally cooling after burning, obtaining the powdered rice hulls conditioning sludge incineration slag that described size is 80-250 μm.
The method of powdered rice hulls conditioning sludge incineration slag conditioning municipal sludge of the present invention, comprises the following steps:
Get a certain amount of primary sludge, add the powdered rice hulls conditioning sludge incineration slag of 65%-70% mud dry weight, all the other steps are identical with step (1)-(2) described in conditioning sludge incineration slag preparation method, then carry out filter dehydration to mud.
Powdered rice hulls in described powdered rice hulls conditioning sludge incineration slag preparation takes from common grain processing plant's rice husk, and be milled into powdered rice hulls after drying, powdered rice hulls size is 109-150 μm.
Described powdered rice hulls conditioning sludge incineration slag preparation and the mud nursed one's health in municipal sludge method thereof are the excess sludge of sludge from wastewater treatment plant concentration basin.
The invention has the advantages that: cost prepared by powdered rice hulls conditioning sludge incineration slag of the present invention and difficulty reduce greatly, and powdered rice hulls conditioning sludge incineration slag is far superior to primary sludge incineration slag in the dewatering improving municipal sludge, with singly add compared with mud that iron(ic) chloride nurses one's health, sludge specific resistance decline 60%-67%, the clean productive rate of mud improves 37%-52%, and moisture content of the cake reaches 70-75%.And working method of the present invention is simple, practical, for solution environmental pollution, to realize the treatment of wastes with processes of wastes against one another significant.
Embodiment:
Below by specific embodiment, the present invention is set forth further, but do not limit the present invention.
Rice husk used in the present embodiment takes from Changsha grain processing plant rice husk, powdered rice hulls is milled into after drying, powdered rice hulls size is 109-150 μm, embodiment 1, embodiment 2 and embodiment 3 mud used takes from the excess sludge of Changsha second sewage work, primary sludge water ratio is 98.9-99.5%, embodiment 4 mud used takes from the excess sludge of Changsha first sewage work, and primary sludge water ratio is 98.2-99.3%.
Embodiment 1:
(1) get a certain amount of primary sludge, add the powdered rice hulls of 65% mud dry weight, stir 30s with 350rpm;
(2) under the agitation condition of 40rpm, in above-mentioned mud, continue the iron(ic) chloride adding 138.09g/kg mud dry weight, stir 3min;
(3) by the sludge filtration dehydration after above-mentioned conditioning, the sludge cake obtained is dried at 105 DEG C;
(4) sludge cake after oven dry is burned 1h at 400 DEG C;
(5) sieving milling after the residual solids naturally cooling after burning, obtaining the powdered rice hulls conditioning sludge incineration slag that described size is 80-250 μm.
The powdered rice hulls conditioning sludge incineration slag prepared by embodiment 1 carries out the sludge conditioning in following 2-4.
Embodiment 2: get a certain amount of primary sludge, powdered rice hulls conditioning sludge incineration slag prepared by the embodiment 1 adding 68% mud dry weight carries out sludge conditioning, all the other steps are identical with step (1)-(2) described in embodiment 1, then carry out filter dehydration to the mud after conditioning.Acquired results is as follows: primary sludge resistivity is 1.20 × 10
13m/kg, the clean productive rate of mud is 1.94kg/ (m
2h), after singly adding iron(ic) chloride, sludge specific resistance is 1.51 × 10
12m/kg, the clean productive rate of mud is 18.99kg/ (m
2h), 5.45 × 10 are dropped to the sludge specific resistance of powdered rice hulls conditioning sludge incineration slag conditioning
11m/kg, the clean productive rate of mud rises to 26.27kg/ (m
2h), filter cake moisture content drops to 72.9% by original 92.71%.
Embodiment 3: get a certain amount of primary sludge, powdered rice hulls conditioning sludge incineration slag prepared by the embodiment 1 adding 70% mud dry weight carries out sludge conditioning, all the other steps are identical with step (1)-(2) described in embodiment 1, then carry out filter dehydration to the mud after conditioning.Acquired results is as follows: primary sludge resistivity is 1.75 × 10
13m/kg, the clean productive rate of mud is 1.47kg/ (m
2h), after singly adding iron(ic) chloride, sludge specific resistance is 1.46 × 10
12m/kg, the clean productive rate of mud is 14.18kg/ (m
2h), 4.87 × 10 are dropped to the sludge specific resistance of powdered rice hulls conditioning sludge incineration slag conditioning
11m/kg, the clean productive rate of mud rises to 21.60kg/ (m
2h).Filter cake moisture content drops to 71.17% by 93.88%.
Embodiment 4: get a certain amount of primary sludge, powdered rice hulls conditioning sludge incineration slag prepared by the embodiment 1 adding 73% mud dry weight carries out sludge conditioning, all the other steps are identical with step (1)-(2) described in embodiment 1, then carry out filter dehydration to the mud after conditioning.Acquired results is as follows: primary sludge resistivity is 9.05 × 10
12m/kg, the clean productive rate of mud is 2.73kg/ (m
2h), after singly adding iron(ic) chloride, sludge specific resistance is 4.19 × 10
11m/kg, the clean productive rate of mud is 21.70kg/ (m
2h), 1.35 × 10 are dropped to the sludge specific resistance of powdered rice hulls conditioning sludge incineration slag conditioning
11m/kg, the clean productive rate of mud rises to 29.83kg/ (m
2h).Filter cake moisture content drops to 70.72% by 90.63%.
Claims (4)
1. a preparation method for powdered rice hulls conditioning sludge incineration slag, is characterized in that, described sludge conditioner adopts burning method preparation, comprises the following steps:
(1) get a certain amount of primary sludge, add the powdered rice hulls of 65%-70% mud dry weight, stir 20-40s with 250-350rpm;
(2) under the agitation condition of 40-60rpm, in above-mentioned mud, continue the iron(ic) chloride adding 115.07-138.09g/kg dewatered sludge quality, stir 2-4min;
(3) by the sludge filtration dehydration after above-mentioned conditioning, the sludge cake obtained is dried at 100-120 DEG C;
(4) sludge cake after oven dry is burned 1-3h at 350-450 DEG C;
(5) sieving milling after the residual solids naturally cooling after burning, obtaining the powdered rice hulls conditioning sludge incineration slag that described size is 80-250 μm.
2. the application of powdered rice hulls conditioning sludge incineration slag as claimed in claim 1 in dehydrating municipal sludge, it is characterized in that, get a certain amount of primary sludge, the powdered rice hulls conditioning sludge incineration slag according to claim 1 adding 65%-75% mud dry weight carries out sludge conditioning, all the other steps are identical with step described in claim 1 (1)-(2), then carry out filter dehydration to the mud after conditioning.
3. method as claimed in claim 1, it is characterized in that, described powdered rice hulls takes from common grain processing plant's rice husk, is milled into powdered rice hulls after drying, and the size of powdered rice hulls is 109-150 μm.
4. the method as described in claim as arbitrary in claim 1 ~ 2, is characterized in that, described mud is the excess sludge of municipal sewage plant.
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| CN201510175023.0A CN104761111B (en) | 2015-04-14 | 2015-04-14 | A kind of method of powdered rice hulls conditioning sludge incineration slag preparation and conditioning municipal sludge thereof |
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| CN201510175023.0A CN104761111B (en) | 2015-04-14 | 2015-04-14 | A kind of method of powdered rice hulls conditioning sludge incineration slag preparation and conditioning municipal sludge thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502884A (en) * | 2015-12-07 | 2016-04-20 | 章亮庄 | High-efficiency and low-cost sludge dewatering method |
| CN110066096A (en) * | 2019-03-06 | 2019-07-30 | 哈尔滨工业大学 | Improve the method for dehydration property and settleability |
| CN110642494A (en) * | 2019-09-30 | 2020-01-03 | 齐鲁工业大学 | Application of biomass ash as framework construction body in sludge dewatering and method for improving dewatering performance of papermaking excess sludge |
| CN111423057A (en) * | 2020-04-03 | 2020-07-17 | 关向辉 | System and method for resourceful treatment and utilization of kitchen waste |
| CN113149694A (en) * | 2021-06-09 | 2021-07-23 | 广东绿友环保科技有限公司 | Method for preparing high-strength ceramic tile from activated sludge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0587045A2 (en) * | 1992-09-11 | 1994-03-16 | BASF Aktiengesellschaft | Method for the utilization of waste plastics |
| CN101597532A (en) * | 2009-07-09 | 2009-12-09 | 余国贤 | A kind of sludge fuel and preparation method thereof |
| CN103449688A (en) * | 2012-05-28 | 2013-12-18 | 苏州科羽电子技术服务有限公司 | Sludge processing method |
| CN103553293A (en) * | 2013-11-07 | 2014-02-05 | 上海环保工程成套有限公司 | Deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue |
| CN103880267A (en) * | 2014-02-27 | 2014-06-25 | 同济大学 | Method for treating fresh flocculent sludge by using landfill sludge incineration residues |
-
2015
- 2015-04-14 CN CN201510175023.0A patent/CN104761111B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0587045A2 (en) * | 1992-09-11 | 1994-03-16 | BASF Aktiengesellschaft | Method for the utilization of waste plastics |
| CN101597532A (en) * | 2009-07-09 | 2009-12-09 | 余国贤 | A kind of sludge fuel and preparation method thereof |
| CN103449688A (en) * | 2012-05-28 | 2013-12-18 | 苏州科羽电子技术服务有限公司 | Sludge processing method |
| CN103553293A (en) * | 2013-11-07 | 2014-02-05 | 上海环保工程成套有限公司 | Deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue |
| CN103880267A (en) * | 2014-02-27 | 2014-06-25 | 同济大学 | Method for treating fresh flocculent sludge by using landfill sludge incineration residues |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502884A (en) * | 2015-12-07 | 2016-04-20 | 章亮庄 | High-efficiency and low-cost sludge dewatering method |
| CN105502884B (en) * | 2015-12-07 | 2018-07-13 | 章亮庄 | A kind of mud dewatering method of high efficiency, low cost |
| CN110066096A (en) * | 2019-03-06 | 2019-07-30 | 哈尔滨工业大学 | Improve the method for dehydration property and settleability |
| CN110642494A (en) * | 2019-09-30 | 2020-01-03 | 齐鲁工业大学 | Application of biomass ash as framework construction body in sludge dewatering and method for improving dewatering performance of papermaking excess sludge |
| CN110642494B (en) * | 2019-09-30 | 2022-06-24 | 齐鲁工业大学 | Application of biomass ash as framework construction body in sludge dewatering and method for improving dewatering performance of papermaking excess sludge |
| CN111423057A (en) * | 2020-04-03 | 2020-07-17 | 关向辉 | System and method for resourceful treatment and utilization of kitchen waste |
| CN113149694A (en) * | 2021-06-09 | 2021-07-23 | 广东绿友环保科技有限公司 | Method for preparing high-strength ceramic tile from activated sludge |
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