CN106630513A - Novel sludge pretreating method - Google Patents
Novel sludge pretreating method Download PDFInfo
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- CN106630513A CN106630513A CN201710008008.6A CN201710008008A CN106630513A CN 106630513 A CN106630513 A CN 106630513A CN 201710008008 A CN201710008008 A CN 201710008008A CN 106630513 A CN106630513 A CN 106630513A
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- sludge
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The invention belongs to the field of sludge treatment and particularly relates to a novel sludge pretreating method. The novel sludge pretreating method includes the steps of firstly, performing solid-liquid separation on to-be-treated sludge, and dewatering; secondly, performing detonation treatment, to be more specific, placing materials obtained in the first step into a closed pressure container, feeding high-pressure steam, keeping the air pressure of 1.0-2.5MPa for 4-15 minutes, releasing the materials and the steam in 60-75ms, relieving pressure to achieve normal pressure, and transferring the materials out of the container; thirdly, performing secondary solid-liquid separation on the materials obtained in the second step to allow heavy metal dissolved in the sludge to be taken away along with liquid. The novel sludge pretreating method has the advantages that the method is simple in production process, stable in product state, safe, and free of secondary pollution, quantity-reduced, stable and harmless sludge treatment can be achieved, advantages are created for subsequent recycling, and the method is low in investment, high in efficiency, low in energy consumption and easy to popularize.
Description
Technical field
The invention belongs to the technical field of Treatment of Sludge, specifically a kind of new sludge pre-treatment method.
Background technology
China human mortality substantial amounts, as further urbanization, industrialized development, life of urban resident and industry are given birth to
Fisheries water amount is huger, and the discharge of sewage also increasingly increases, and sewage load also rises therewith.Necessarily produce as sewage disposal
Raw " spin-off " -- sludge yield also rises therewith every year, it is reported that, China's only municipal sludge yield is just up to 3500 within 2015
Ten thousand tons, this does not also include the sludge in the waters such as rivers lake.And the process of current sludge is disposed and is including technological reserve, runing into
There is sharp supply and demand lance with huge specific resistance to filtration demand in the integration capability wretched insufficiency of the aspects such as sheet, government-funded
Shield, this contradiction is just driving specific resistance to filtration Industry Quick Development.
According to analysis, sludge be a kind of stench, it is perishable, containing substantial amounts of malignant bacteria, virus, parasite and various right
The extremely harmful heavy metal of human body, persistent organism polluter, while being also rich in organic matter, nitrogen, phosphorus, the nutrients of potassium
Matter, or a kind of energy substance for including big energy.As the untreated the Nature that is directly entered extremely can be destroyed seriously certainly
So ecological and environment, constitutes a serious threat to the health even life of the mankind.How specific resistance to filtration and in addition effective is carried out
Using having become the problem that people extremely pay close attention to.
It was verified that the final purpose of specific resistance to filtration is to realize sludge " minimizing, stabilisation, innoxious " and " money
Sourceization is utilized ", the technology path of better economy could be selected under this principle.Wherein Treatment of Sludge (sludge
Treatment) typically refer to concentrate sludge, quenched, dehydration, minimizing, stabilisation, the nothing such as stable, mummification or burning
The process of evilization.
At present, the feasible sludge disposal technology route of main flow（Cover west more than 95%）Mainly have and " fill out after deep dehydration
Bury ", " burn after mummification again lime-ash landfill or building materials utilization ", " Land_use change after aerobic fermentation ", " soil profit after anaerobic digestion
With ", though respectively there is advantage, the high defect of efficiency low cost is all there is, bring very big puzzlement to investment operation.
A large amount of soils, processing cost are occupied due to landfill increasingly to improve and the raising with environmental protection standard and recovery profit
With the enforcement of policy, landfill method has not been the approach of sustainable development.Sludge is a kind of preferable outlet as farmland fertilizer, but dirty
The heavy metal and organic pollution of the accumulation in mud is subject to certain restrictions will the application.Sludge incineration is processed has other
Some advantages not available for processing method, such as volume reduction amount are big, organic matter thermal decomposition is thorough, but need to consume auxiliary plus heat energy
Source, and burn and can cause secondary pollution.
Sewage sludge harmlessness, stabilization treatment method main at present mainly has three kinds：Pyrohydrolytic method, pyrohydrolysis and anaerobism disappear
Change combined method, part wet oxidation process.Wherein pyrohydrolytic method is will to be placed in 60 DEG C～250 DEG C environment temperatures after sludge and water mixing
Lower hydrolysis tens of seconds allow microorganism wall to rupture to a few hours, and carbohydrate, fat, protein and cellulose are hydrolyzed
Reaction, so as to reach the purpose for improving sludge dewatering, but only pyrohydrolysis, can allow the volatility and pyrohydrolysis dissolved in water
The organic gas of generation overflows, and causes mud extraction unstable perishable；Pyrohydrolysis solves pyrohydrolysis mud extraction not with anaerobism combined techniques
Stable problem, moreover it is possible to produce methane equal energy source gas, but because domestic mud organic substance content is more external much lower, produce
Tolerance and running effect aspect are poor, and investment in large scale is huge, is only suitable for the Treatment of Sludge of Large Sewage Treatment Plant, fits
It is restricted with property；Part wet oxidation process, in the time of 10～30min, makes under the conditions of 160 DEG C～220 DEG C of environment temperature
Part organic matter produces oxidation reaction, and the organic acid that oxidizing process is produced can dissolve, remove heavy metal, and by adding auxiliary agent
The recycling of sludge is realized, but there is big separating liquid turbidity, pipeline and equipment and block serious, weight in part wet oxidation process
The low defect of metal removal efficiency.
Have at present extensive commercial application and more successfully surely belong to sludge hot technology for hydrolyzing, sludge pyrohydrolysis is right
Sludge is heated so as to part cellular material hydrolysis in sludge, be converted into small-molecule substance from macromolecular, consequently facilitating after
The digestion process of sequence sludge.
But existing sludge hot technology for hydrolyzing effect is still undesirable.The mainly temperature of these sludge hot hydrolysis process
The relatively low, time is short, many classes of some of sludge organic principle such as fat, carbohydrate, fiber and flocculant polyacrylamide
Organic matter does not reach the condition of hydrolysis at all, it is impossible to complete hydrolysis；High temperature oxidation process is increased after hydrolyzing for this people, so
Separation of solid and liquid is carried out afterwards processes the base-material for obtaining fertilizer；Higher temperature and pressure makes it possible to that water consumption is gentle to be set in oxidation processes
Standby to require to significantly improve, the design, making requirement to pressure reacting container is higher, and operating cost rises, and management difficulty is increased.
The content of the invention
For the above-mentioned deficiency of prior art, the invention provides a kind of sludge pre-treatment method, incites somebody to action " Hong quick-fried process " skill
Art is incorporated in the middle of sludge pretreatment, thoroughly solves the various knotty problems of existing sludge disposal technology, is follow-up further money
Sourceization is utilized and creates good condition.
The present invention provide technical scheme be：
A kind of new sludge pre-treatment method, comprises the following steps：
（1）Separation of solid and liquid：Pending sludge is carried out into separation of solid and liquid, is dehydrated；
（2）Hong quick-fried process：By step（1）Resulting material is inserted in closed pressure vessel, is passed through high steam, keep 1.0～
2.5MPa 4～15min of air pressure, discharge material and steam and pressure release are to normal pressure in 60-75ms, then material are produced into container；
（3）Secondary separation of solid and liquid：By step（2）Resulting material carries out again separation of solid and liquid, make in sludge dissolve heavy metal with
Waste liquid is taken away by separation.
The innovation of the present invention be it is creative sludge is processed using " Hong quick-fried process " technology, and achieve meaning
Unimaginable good technique effect.
So-called " Hong quick-fried process " treatment technology, on technological essence in two stages：
In the first stage, closed container high steam is passed through, the 4～15min of high pressure of 1.0～2.5MPa, corresponding high temperature is kept
About at 70 DEG C～230 DEG C so as in sludge first by high-temperature steam vapor phase pulping, the intracellular moisture temperature of material is raised,
And the organisms cell wall ruptures such as various thermal chemical reactions, bacterium, virus, the parasite allowed in sludge, carbohydrate, the fat such as there is
There is pyrohydrolysis reaction in fat, protein and cellulose and other organic pollutions, make the lignocellulosic structure in organism soft
Change and Partial digestion, the effect of next stage blasting process can be amplified.
Second stage, by making sludge recover to air from high pressure in the very short time close to zero of approximate explosion
Pressure so that infilter the high temperature and high pressure steam molecule instantaneous relase inside biological tissue and finish, the Blasting shock wave of generation is acted on
Biomass micropore institutional framework, internal steam work is converted into mechanical energy and acts on biomass histocyte interlayer, so as to realize using
Less energy is decomposed raw material by purpose.
In this course, heavy metal extremely harmful in sludge is also hydrolyzed the organic acid dissolving of generation, then passes through
The method removing of separation of solid and liquid, so as to realize the innoxious governance of Heavy Metals in Sludge.
Sludge pretreatment gained waste liquid can further harmless treatment, such as flash distillation curing process.
Pretreated sludge can further recycling, such as can obtain through further aerobic fermentation or anaerobic fermentation
The beneficial resources such as base-material, Soil improvement matrix and energy gas to fertilizer, so as to realize innoxious, the resource of Treatment of Sludge
Change, minimizing and safe non-secondary pollution.
The further optimization and/or improvements of the present invention have：
One of preferred version, the step（1）Separation of solid and liquid using screw extrusion separate or centrifugation.
The two of preferred version, the step（2）High steam be saturated steam or supersaturation water steam.
The three of preferred version, the step（3）Separation of solid and liquid using screw extrusion separate or centrifugation.
Implementing the beneficial effect of technical solution of the present invention is：
A kind of new sludge pre-treatment method that the present invention is provided, with simple production process, output object be in stable condition, safe nothing
The advantage of secondary pollution, successfully realizes the minimizing of Treatment of Sludge, innoxious, resource, while having small investment, efficiency
It is high, energy consumption is low, be easy to the advantage of penetration and promotion.
Technical scheme is described in detail with reference to embodiment.
Description of the drawings
Without accompanying drawing.
Specific embodiment
To make those skilled in the art more fully understand technical scheme, with reference to embodiment to present invention work
Further describe in detail.
Embodiment 1：2 tons of the sludge of sewage treatment plant's generation is taken, is implemented according to the following steps：
（1）Separation of solid and liquid：Pending sludge is added in screw extrusion separator, separation of solid and liquid is carried out, is dehydrated；
（2）Hong quick-fried process：By step（1）Resulting material is inserted in closed pressure vessel, is passed through high pressure saturated steam, is kept
2.5MPa vapour pressures 4min, with the time release material and steam of 60ms, simultaneously material, to normal pressure, is then produced container by pressure release；
（3）Secondary separation of solid and liquid：By step（2）Resulting material is added in centrifugal separator and carries out separation of solid and liquid, is dissolved in sludge
Heavy metal taken away by separation with liquid.
The follow-up sludge by after pyrohydrolysis process further adds aerobic fermentation bacterium solution, enters to act charitably under certain condition
Aerobe fermentation, separation of solid and liquid after the completion of fermentation, completes Treatment of Sludge, obtains Modified soil and obtains；Waste liquid of the gained containing heavy metal can enter
One step harmless treatment, such as flash distillation curing process.
Embodiment 2：3 tons of the sludge of river course generation is taken, is implemented according to the following steps：
（1）Separation of solid and liquid：Pending sludge is added in centrifugal separator, separation of solid and liquid is carried out, is dehydrated；
（2）Hong quick-fried process：By step（1）Resulting material is inserted in closed pressure vessel, is passed through high pressure supersaturation water steam, is kept
1.0MPa vapour pressures 15min, with the time release material and steam of 75ms, simultaneously material, to normal pressure, is then produced container by pressure release；
（3）Secondary separation of solid and liquid：By step（2）Resulting material is added in screw extrusion separator and carries out separation of solid and liquid, sludge
The heavy metal of middle dissolving is taken away with liquid by separation.
The follow-up sludge by after pyrohydrolysis process further adds anaerobic digestion bacterium solution, is disappeared under certain condition
Change reaction, separation of solid and liquid after the completion of digestion completes Treatment of Sludge, obtains the base-material of fertilizer.
Embodiment 3：4 tons of the sludge of sewage treatment plant's generation is taken, is implemented according to the following steps：
（1）Separation of solid and liquid：Pending sludge is added in centrifugal separator, separation of solid and liquid is carried out, is dehydrated；
（2）High-temperature pressurizing is pyrolyzed：By step（1）Resulting material is put in closed pressure vessel, is passed through saturated steam, is kept
2.0MPa vapour pressures 10min, discharge vapor and recover to normal pressure with the time of 70ms, produce material；
（3）Secondary separation of solid and liquid：By step（2）Resulting material is added in screw extrusion separator and carries out separation of solid and liquid, sludge
The heavy metal of middle dissolving is taken away with liquid by separation.
The follow-up sludge by after pyrohydrolysis process, adjusts pH value to 5.0～8.0, adds and is stirred after aerobic fermentation bacterium solution
Mix uniform, undecomposed organic matter is aoxidized by biological inoculums such as good hair care yeast-like fungis, standing for fermentation to there is clear water to ooze out, solid-liquid again
Separate, obtain the base-material of fertilizer, that is, complete Treatment of Sludge.
It is understood that the above example principle being intended to be merely illustrative of the present and the exemplary embodiment party for adopting
Formula, but the invention is not limited in this, can technology according to the present invention scheme determine specific embodiment party with actual conditions
Formula.For those skilled in the art, without departing from the spirit and substance in the present invention, can make
Various modifications and improvement, these modifications of increase and improvement are also considered as protection scope of the present invention.
Claims (4)
1. a kind of new sludge pre-treatment method, it is characterised in that comprise the following steps：
（1）Separation of solid and liquid：Pending sludge is carried out into separation of solid and liquid, is dehydrated；
（2）Hong quick-fried process：By step（1）Resulting material is put in closed pressure vessel, is passed through high steam, keep 1.0～
2.5MPa 4～15min of air pressure, discharge material and steam and pressure release are to normal pressure in 60～75ms, then material are produced into container；
（3）Secondary separation of solid and liquid：By step（2）Resulting material carries out again separation of solid and liquid, make in sludge dissolve heavy metal with
Liquid is taken away by separation.
2. a kind of new sludge pre-treatment method according to claim 1, it is characterised in that the step（1）Solid-liquid point
From using screw extrusion separation or centrifugation.
3. a kind of new sludge pre-treatment method according to claim 1, it is characterised in that the step（2）High pressure steam
Vapour is saturated steam or supersaturation water steam.
4. a kind of new sludge pre-treatment method according to claim 1, it is characterised in that the step（3）Solid-liquid point
From using screw extrusion separation or centrifugation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710008008.6A CN106630513A (en) | 2017-01-05 | 2017-01-05 | Novel sludge pretreating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710008008.6A CN106630513A (en) | 2017-01-05 | 2017-01-05 | Novel sludge pretreating method |
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| CN106630513A true CN106630513A (en) | 2017-05-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249714A (en) * | 2018-02-02 | 2018-07-06 | 东华大学 | A kind of river bottom mud stabilizes and the method for recycling |
| CN108558152A (en) * | 2018-02-02 | 2018-09-21 | 东华大学 | A kind of method of river bottom mud recycling |
| CN109694173A (en) * | 2019-02-15 | 2019-04-30 | 清正生态科技(苏州)有限公司 | Sludge heavy-metal steam explosion removes system |
| CN110127981A (en) * | 2019-05-24 | 2019-08-16 | 江苏安识环境科技有限公司 | Mud decrement processing system and its technique |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863600A (en) * | 2009-04-16 | 2010-10-20 | 刘文治 | Method for removing heavy metals from activated sludge |
| CN104003593A (en) * | 2014-06-14 | 2014-08-27 | 济南米铎碳新能源科技有限公司 | Sludge harmless treatment method |
-
2017
- 2017-01-05 CN CN201710008008.6A patent/CN106630513A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863600A (en) * | 2009-04-16 | 2010-10-20 | 刘文治 | Method for removing heavy metals from activated sludge |
| CN104003593A (en) * | 2014-06-14 | 2014-08-27 | 济南米铎碳新能源科技有限公司 | Sludge harmless treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 刘越: "蒸汽***预处理技术对污泥厌氧消化影响的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑（月刊）》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249714A (en) * | 2018-02-02 | 2018-07-06 | 东华大学 | A kind of river bottom mud stabilizes and the method for recycling |
| CN108558152A (en) * | 2018-02-02 | 2018-09-21 | 东华大学 | A kind of method of river bottom mud recycling |
| CN108558152B (en) * | 2018-02-02 | 2021-05-04 | 东华大学 | Method for recycling river sediment |
| CN109694173A (en) * | 2019-02-15 | 2019-04-30 | 清正生态科技(苏州)有限公司 | Sludge heavy-metal steam explosion removes system |
| CN110127981A (en) * | 2019-05-24 | 2019-08-16 | 江苏安识环境科技有限公司 | Mud decrement processing system and its technique |
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Application publication date: 20170510 |