CN104003593B - Sludge harmless treatment method - Google Patents
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- CN104003593B CN104003593B CN201410263120.0A CN201410263120A CN104003593B CN 104003593 B CN104003593 B CN 104003593B CN 201410263120 A CN201410263120 A CN 201410263120A CN 104003593 B CN104003593 B CN 104003593B
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Abstract
The invention belongs to technical field of sludge treatment. The invention discloses a kind of sludge harmless treatment method, for solving sludge treatment technique complexity in prior art, processing the problem not thorough, treatment effeciency is low. The present invention includes following steps: 1) mud is passed through to adsorption method heavy-metal ion removal; 2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour; 3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content lower than 20% mud powder. The present invention removes the heavy metal in mud by adsorption technology, and adopts the quick-fried decomposition technique of vapour, removes worm's ovum in mud, pathogen, carcinogenic substance, the difficult large molecule organic agricultural chemicals decomposing etc.; Very ingenious, completed sewage sludge harmlessness processing expeditiously. Technique is short, processes thoroughly, and small-molecule substance content is high thereby be conducive to finally obtain the exploitation of clean mud powder. Gained mud powder can be used for manufacturing cement, brick and tile, fertilizer etc.
Description
Technical field
The present invention relates to technical field of sludge treatment, particularly a kind of sludge harmless treatment method.
Background technology
The method of disposal of the outer municipal sludge of Present Domestic mainly contains 3 kinds: sanitary landfills; Sludge incineration; Mud is thrown sea.
Sanitary landfills: sanitary landfills is simple to operate, investment cost is less, strong adaptability, but its appropriation of land is serious, if seepage control technique is inadequate, will cause potential soil pollution and underground water pollution.
Sludge incineration: contain a certain amount of organic principle in mud, the mud through dehydrating can be processed with burning, thereby makes the whole carbonizations of organic matter, and pathogen kill, reduces sludge volume to greatest extent. But its shortcoming is treatment facility, investment is large, and disposal cost is high, and organic matter burns and can produce noxious material simultaneously.
Mud is thrown sea: along with the reinforcement of ecological environment consciousness, people pay close attention to more and more mud and throw the impact that sea may exist the marine eco-environment. A lot of countries have forbidden that mud is to ocean dumping.
Along with economic development, municipal sewage quantity constantly increases. According to correlation predictive, China's dewatered sludge annual production nearly 3 × 10 at present6T. In municipal sludge, contain a large amount of N, P, K, Ca and organic matter, and N, P are taking organic as main, can slowly discharge, and have long-lasting. Mud is useful living resources, if rationally utilization can be turned waste into wealth after mud is processed.
Treatment of Sludge is carried out harmless processing process to mud exactly, comprises the heavy metal removed in mud, pathogen, worm's ovum, carcinogenic substance, organic macromolecule etc. Existing newer method for sludge treatment mainly comprises mud wet oxidation process, Membrane Bioreactor for Wastewater Treatment method.
Mud wet oxidation process (WO method) is that mud is placed in to closed reactor, passes into air or oxygen and make oxidant under high-temperature and high-pressure conditions, by submerged combustion principle, oxidation operation in mud is decomposed, and organic matter is converted into the process of inorganic matter. This method is mainly applicable to process the organic sludge of various difficult degradations, and shortcoming is equipment complexity, and operation and maintenance cost is high.
Membrane Bioreactor for Wastewater Treatment method refers to the new technology forming that mutually combines of the bioreactor in the film system in membrane separation technique and Sewage Biological Treatment engineering. In membrane bioreactor the time of staying of mud very long, cause the process time long, treatment effeciency is low, even can avoid spoil disposal, but the obstruction of film and membrane material price problem have limited applying of the method.
The patent of invention that application publication number is " CN103408206A " discloses a kind of sludge treating system, comprise housing, case top is provided with sewage import, in the housing of sewage import department, be provided with a dividing plate, dividing plate and housing sidewall form a methane-generating pit, mixing component is installed in methane-generating pit, after methane-generating pit, be connected with digester, digester top is provided with chemical feed pipe, after digester, be connected with mixing kettle, mixing kettle is connected to drying baker by conveyance conduit, and drying baker bottom is connected with sludge collection box by pipeline. This sludge treating system to sludge fermentation processing, is processed not thorough by methane-generating pit.
From the aspect such as exploitation, the protection of urban ecological environment of expanding economy, resource, the desirable outlet that municipal sludge is disposed should be recycling. Avoiding the secondary pollution of urban ecological environment, save disposal costs, turn waste into wealth, make it to have good ecological benefits, environmental benefit, economic benefit and social benefit, is inevitable requirement and the development trend of urban sustainable development. The object of the present invention is to provide a kind of municipal sludge method for innocent treatment, be beneficial to the resource of mud, high-valued application.
Summary of the invention
The object of the present invention is to provide a kind of sludge harmless treatment method, for solving the complex treatment process to mud in prior art, processing the problem not thorough, efficiency is low, equipment is complicated, operation and maintenance cost is high.
Technical scheme of the present invention is:
A kind of sludge harmless treatment method, comprises the following steps:
1) mud is passed through to adsorption method heavy-metal ion removal;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to described closed container; Described mud after vapor phase pulping 5 ~ 300min, is opened described closed container and communicates with atmosphere under 60 ~ 300 DEG C of temperature, pressure 0.1 ~ 2.5Mpa condition, step-down suddenly;
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content lower than 20% mud powder.
Wherein, in step 1), adopt adsorption technology to remove the heavy metal ion in mud; Step 2) in to the quick-fried decomposition of the vapour of mud, mud is vapor phase pulping under high temperature (60 ~ 300 DEG C), high pressure (0.1 ~ 2.5Mpa) condition, macromolecular organic principle is degraded, steam infiltrates worm's ovum, pathogen cells inside simultaneously, suddenly decompression after certain hour (5 ~ 300 minutes), medium and material acting in conjunction complete the energy release process of physics, vapour phase medium ejection moment rapid expansion in material, the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed. Vapour is quick-fried is divided into two stages, is first vapor phase pulping, and high steam is penetrated into the space in material, separates for the quick-fried process of vapour provides optionally machinery; Next is that the quick-fried process of vapour utilizes vapour phase saturated vapor and the acting in conjunction of high temperature liquid water two media in material, the adiabatic expansion that moment completes, externally work done. In the quick-fried process of vapour, the gas expanding acts on material with the form of shock wave, make material produce shearing force amoeboid movement under softening condition, because material deformation velocity is much smaller compared with shock velocity, make it repeatedly to produce shearing force worm's ovum, pathogen, carcinogenic substance, the difficult larger molecular organics decomposing etc. are decomposed rapidly.
Preferably, the moisture content of mud described in step 1) is 40% ~ 99%. Moisture content is too low, may occur the halfway problem of the elimination such as worm's ovum, pathogen.
Further, the moisture content of mud described in step 1) is 60% ~ 80%. Moisture content is higher, and the clean level of gained mud powder is higher, but the too high meeting of moisture content affects treatment effeciency to a certain extent.
Preferably, in step 1), heavy-metal ion removal adsorbent used is at least two kinds in silicate, algin, active carbon.
Preferably, step 2) described in mud under 150 ~ 300 DEG C of temperature, pressure 1.6 ~ 2.5Mpa condition, after vapor phase pulping 100 ~ 300min, open described closed container and communicate with atmosphere, step-down suddenly. Temperature is higher, pressure is larger, the time is longer, processes more thorough to worm's ovum, pathogen, larger molecular organics in mud.
Further, step 2) described in mud under 180 ~ 220 DEG C of temperature, pressure 1.8 ~ 2.3Mpa condition, after vapor phase pulping 160 ~ 220min, open described closed container and communicate with atmosphere, step-down suddenly. Temperature is higher, pressure is larger, the time is longer, processes more thorough to worm's ovum, pathogen, larger molecular organics in mud. But temperature height to a certain extent, pressure greatly to a certain extent, after the time grows to a certain degree, the treatment effect of mud is not improved.
Beneficial effect of the present invention is:
The present invention adopts adsorption technology to remove the heavy metal ion in mud; Adopt vapour quick-fried decomposition technique to remove worm's ovum in mud, pathogen, carcinogenic substance, the difficult large molecule organic agricultural chemicals decomposing etc., very ingenious, to have completed expeditiously mud harmless treatment. Equipment is simple, operation and maintenance cost is low, be suitable for promoting the use of. In addition, sludge harmless treatment method of the present invention, technique is short, processing is thorough, and after the quick-fried decomposition of vapour, mud small molecular content of material is high, thereby is conducive to finally obtain the Application and Development of clean mud powder. Gained mud powder can be used for manufacturing cement, brick and tile, fertilizer etc.
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Detailed description of the invention
Embodiment 1
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 40% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 300min, is opened closed container and communicates with atmosphere under temperature 60 C, pressure 2.5Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 20% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 2
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 50% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is algin, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 200min, is opened closed container and communicates with atmosphere under 120 DEG C of temperature, pressure 2.0Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 15% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 3
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 60% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 280min, is opened closed container and communicates with atmosphere under 180 DEG C of temperature, pressure 2.2Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 10% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 4
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 70% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 260min, is opened closed container and communicates with atmosphere under 200 DEG C of temperature, pressure 2.2Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 12% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 5
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 80% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 220min, is opened closed container and communicates with atmosphere under 220 DEG C of temperature, pressure 2.3Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 16% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 6
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 90% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 200min, is opened closed container and communicates with atmosphere under 260 DEG C of temperature, pressure 1.8Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 17% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 7
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 99% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 90min, is opened closed container and communicates with atmosphere under 200 DEG C of temperature, pressure 1.6Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 16% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 8
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 76% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 120min, is opened closed container and communicates with atmosphere under 180 DEG C of temperature, pressure 1.5Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 8% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 9
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 68% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 170min, is opened closed container and communicates with atmosphere under 130 DEG C of temperature, pressure 1.2Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 10% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Embodiment 10
A kind of sludge harmless treatment method, comprises the following steps:
1) mud that is 99% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is active carbon, algin;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 50min, is opened closed container and communicates with atmosphere under 220 DEG C of temperature, pressure 2.0Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed.
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 12% clean mud powder. In gained mud powder containing heavy metal ion, containing materials such as worm's ovums, pathogen, larger molecular organics.
Claims (1)
1. a sludge harmless treatment method, comprises the following steps:
1) mud that is 90% by moisture content is by adsorption method heavy-metal ion removal, and wherein sorbent used is silicate, algin, active carbon;
2) mud of heavy-metal ion removal is carried out to the quick-fried decomposition of vapour, concrete, the mud of heavy-metal ion removal is inserted in closed container, and pass into water vapour to closed container; Mud after vapor phase pulping 200min, is opened closed container and communicates with atmosphere under 260 DEG C of temperature, pressure 1.8Mpa condition, step-down suddenly; Medium and material acting in conjunction complete the energy release process of physics, the vapour phase medium ejection moment rapid expansion in material, and the rapid bumping of high temperature liquid water in material forms flash distillation simultaneously, and worm's ovum, pathogen, the difficult larger molecular organics decomposing etc. are decomposed;
3) by step 2) the clean mud that obtains dewaters, dry, obtain moisture content and be 17% clean mud powder;
In gained mud powder, do not contain heavy metal ion, worm's ovum, pathogen, larger molecular organics material.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106219918A (en) * | 2016-08-31 | 2016-12-14 | 柳州市润广科技有限公司 | A kind of sludge harmless treatment method |
| CN106630513A (en) * | 2017-01-05 | 2017-05-10 | 新疆弘瑞达纤维有限公司 | Novel sludge pretreating method |
| CN110395860B (en) * | 2019-07-25 | 2022-03-08 | 四川美富特环境治理有限责任公司 | Sludge recycling treatment method and system |
| CN110510848A (en) * | 2019-08-19 | 2019-11-29 | 东莞市逸轩环保科技有限公司 | Biochemical sludge decrement treatment system |
| CN112526109B (en) * | 2021-02-07 | 2021-07-06 | 中国科学院生态环境研究中心 | Risk detection method for sludge in soil resource utilization |
| CN115213218A (en) * | 2022-07-20 | 2022-10-21 | 苏州翊清环境科技有限公司 | Soil heavy metal stabilization method based on steam explosion technology |
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|---|---|---|---|---|
| JPS60187399A (en) * | 1984-03-07 | 1985-09-24 | Kubota Ltd | Thermal treatment of sludge |
| CN103172237A (en) * | 2013-04-15 | 2013-06-26 | 农业部沼气科学研究所 | Method for producing methane in anaerobic digestion by pretreating sludge through steam explosion |
| CN103304118A (en) * | 2012-03-15 | 2013-09-18 | 李铀 | High-pressure digestion and blasting dehydration process of sludge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100515966C (en) * | 2007-04-30 | 2009-07-22 | 重庆大学 | Method for treating sludge heavy metal |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60187399A (en) * | 1984-03-07 | 1985-09-24 | Kubota Ltd | Thermal treatment of sludge |
| CN103304118A (en) * | 2012-03-15 | 2013-09-18 | 李铀 | High-pressure digestion and blasting dehydration process of sludge |
| CN103172237A (en) * | 2013-04-15 | 2013-06-26 | 农业部沼气科学研究所 | Method for producing methane in anaerobic digestion by pretreating sludge through steam explosion |
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Address after: 251600 Shanghe County Economic Development Zone, Ji'nan, Shandong Patentee after: Jinan meter Duo Tan New Energy Technology Co., Ltd. Address before: 252000 2350, 404, Pioneer Road, hi tech Zone, Shandong, Ji'nan Patentee before: Jinan meter Duo Tan New Energy Technology Co., Ltd. |