CN104003593B - Sludge harmless treatment method - Google Patents
Sludge harmless treatment method Download PDFInfo
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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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- ion removal
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- 238000000034 method Methods 0.000 title claims abstract description 68
- 239000010802 sludge Substances 0.000 title claims abstract description 36
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 54
- 244000052769 pathogen Species 0.000 claims abstract description 32
- 230000001717 pathogenic effect Effects 0.000 claims abstract description 32
- 210000004681 ovum Anatomy 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 29
- 102000002322 Egg Proteins Human genes 0.000 claims abstract description 21
- 108010000912 Egg Proteins Proteins 0.000 claims abstract description 21
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 17
- 238000001179 sorption measurement Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 55
- 150000002500 ions Chemical class 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000004537 pulping Methods 0.000 claims description 16
- 239000012808 vapor phase Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 239000012071 phase Substances 0.000 claims description 13
- 238000007701 flash-distillation Methods 0.000 claims description 12
- 239000002594 sorbent Substances 0.000 claims description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 10
- 235000010443 alginic acid Nutrition 0.000 claims description 10
- 229920000615 alginic acid Polymers 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000003183 carcinogenic agent Substances 0.000 abstract description 4
- 229920002521 macromolecule Polymers 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003905 agrochemical Substances 0.000 abstract description 2
- 239000011449 brick Substances 0.000 abstract description 2
- 239000004568 cement Substances 0.000 abstract description 2
- 239000003337 fertilizer Substances 0.000 abstract description 2
- 150000002605 large molecules Chemical class 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000010801 sewage sludge Substances 0.000 abstract 1
- 150000003384 small molecules Chemical class 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000009279 wet oxidation reaction Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000005167 amoeboid movement Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
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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| 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 processing 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 | Sludge heat treatment method |
| 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 | A method for treating heavy metals in sludge |
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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 | Sludge heat treatment method |
| 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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