CN104071956B - A kind of pretreatment process for mud or organic solid waste Continuous Flow - Google Patents
A kind of pretreatment process for mud or organic solid waste Continuous Flow Download PDFInfo
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- CN104071956B CN104071956B CN201410310596.5A CN201410310596A CN104071956B CN 104071956 B CN104071956 B CN 104071956B CN 201410310596 A CN201410310596 A CN 201410310596A CN 104071956 B CN104071956 B CN 104071956B
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- 239000002910 solid waste Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000009413 insulation Methods 0.000 claims abstract description 39
- 238000007701 flash-distillation Methods 0.000 claims abstract description 15
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 230000008676 import Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000009835 boiling Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 claims description 6
- 229920002521 macromolecule Polymers 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 150000003384 small molecules Chemical class 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000009997 thermal pre-treatment Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000010802 sludge Substances 0.000 description 7
- 239000010865 sewage Substances 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000010564 aerobic fermentation Methods 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005112 continuous flow technique Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of pretreatment process for mud or organic solid waste Continuous Flow, it comprises the following steps: be that mud or the organic solid waste of 85%-80% imports in preheating pulp tank continuously by water ratio, carry out preheating pulp by waste hot steam to mud or organic solid waste; Mud after preheating pulp or organic solid waste are imported in hot steam retort continuously; Mud in hot steam retort or organic solid waste are pressed in the multiple heat insulation tanks in series connection by pressure difference, then the mud after insulation or organic solid waste are imported pressure release flash tank and carry out pressure release flash distillation process.Pulp thermal pretreatment, pressurized, heated reaction, heat-insulation pressure keeping pressure release flash distillation process are carried out to mud or organic solid waste, destroy colloidalmaterial, and macromolecular substance is converted into small-molecule substance, the organism of part difficult degradation is converted into the organism of the easy degraded of solubility, substantially increases biodegradable performance and the dewatering of mud and organic solid waste.
Description
Technical field
The invention belongs to mud or organic solid waste technical field, particularly relate to a kind of pretreatment process for mud or organic solid waste Continuous Flow.
Background technology
In recent years, along with the high speed development of sewage treatment industry, improving constantly of municipal sewage treatment ability and wastewater treatment rate, the sludge yield of sewage work also increases thereupon; But, in the sewage disposal development course of China, although mud is one of important step in waste water processes, because long-term understanding is not enough and ignore, the sludge disposal problem of municipal sewage plant of China is shelved for a long time, and the development of sludge disposal is quite delayed.Today that, water surrounding day by day serious at water pollutions worsens increasingly, the Sewage treatment systems lacking mud safe disposal consideration is incomplete, also environmental goals requirement cannot be met, the secondary pollution problem day that mud causes is aobvious outstanding, the problem of mud has arrived the stage that can not be ignored, the safe disposal problem of our mud in the urgent need to address.
The important content having become environment protection and urban environmental hygiene is disposed in the process of mud and other organic solid wastes, and process disposal options common at present has: landfill, aerobic fermentation, anaerobic digestion, mummification and burning etc.But organism and the water ratio of mud and organic solid waste are high, these process disposal options are caused all to be fettered, so a lot of research improves the pretreatment process of mud and organic solid waste biodegradable and dewatering now.And a kind of pretreatment process that hydro-thermal drying technique is developed recently to get up, although can improvement sludge quality to a certain degree, current technology be periodical operation, cause the operation persistence of technology and processing power limited, and very high to equipment requirements.
As can be seen here, prior art needs further Improvement and development
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, a kind of pretreatment process for mud or organic solid waste Continuous Flow provided by the invention, to improve after process mud or the pretreated continuity of organic solid waste and operability.
For solving the problems of the technologies described above, the present invention program comprises:
For a pretreatment process for mud or organic solid waste Continuous Flow, it comprises the following steps:
A, be that the mud of 85%-80% or organic solid waste import in preheating pulp tank continuously by water ratio, by waste hot steam, preheating pulp carried out to mud or organic solid waste;
B, to import the mud after preheating pulp or organic solid waste continuously under 10 bar-15 bar conditions hot steam retort, the mud in hot steam retort or the pressure in organic solid waste remain on 6 bar-7 and cling to, and temperature remains on 160 DEG C-180 DEG C;
C, the mud in hot steam retort or organic solid waste are pressed in the multiple heat insulation tanks in series connection by pressure difference, pressure in heat insulation tank remains on 5 bar-7 and clings to, temperature remains on 150 DEG C-180 DEG C, and mud or organic solid waste are preserved 20 minutes-40 minutes in corresponding heat insulation tank; Then the mud after insulation or organic solid waste are imported pressure release flash tank and carry out pressure release flash distillation process.
Described pretreatment process, wherein, also comprise in above-mentioned steps C: the admission passage of preheating pulp tank is connected with the pressure release flash distillation pipeline of pressure release flash tank, the waste hot steam produced by pressure release flash tank imports the preheating pulp carrying out mud or organic solid waste in preheating pulp tank, and the mud after the process of preheating pulp tank or organic solid waste temperature are 90 DEG C-110 DEG C.
Described pretreatment process, wherein, also comprises in above-mentioned steps C: the mud in heat insulation tank or organic solid waste are pressed into continuously, and 2-5 heat insulation tanks are in series.
Described pretreatment process, wherein, also comprise in above-mentioned steps B: the mud in hot steam retort or organic solid waste import continuously, pass into hot steam that 10 bar-15 cling in hot steam retort continuously to maintain the mud in retort or the pressure in organic solid waste and remain on 6 bar-7 and cling to, temperature remains on 160 DEG C-180 DEG C, and mud or organic solid waste are constantly from hot steam retort press-in heat insulation tank.
Described pretreatment process, wherein, preheating pulp tank recycles waste hot steam and carries out preheating pulp, and hot steam retort carries out pressurized, heated by hot steam, and heat insulation tank has been used for heat-insulation pressure keeping boiling, and pressure release flash tank carries out pressure release flash distillation explosion.
A kind of pretreatment process for mud or organic solid waste Continuous Flow provided by the invention, be that the mud of 80%-85% or organic solid waste carry out pulp thermal pretreatment to water ratio, pressurized, heated is reacted, heat-insulation pressure keeping pressure release flash distillation process, treatment process of the present invention is by mud or organic solid waste pressurized, heated, under certain temperature and pressure, boiling makes the hydrolysis of organic matter of viscosity, destroy colloidalmaterial, and macromolecular substance is converted into small-molecule substance, the organism of part difficult degradation is converted into the organism of the easy degraded of solubility, change character and the structure of mud or organic solid waste, substantially increase biodegradable performance and the dewatering of mud and organic solid waste, achieve resource utilization and the sustainability process of mud, and achieve the object of energy-saving and emission-reduction and minimizing carbon footprint, improve mud or the pretreated continuity of organic solid waste and operability after process.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of pretreatment process in the present invention.
Embodiment
The invention provides a kind of pretreatment process for mud or organic solid waste Continuous Flow, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of pretreatment process for mud or organic solid waste Continuous Flow, as shown in Figure 1, it comprises the following steps:
Step 101: be that municipal sludge or the organic solid waste of 85%-80% is continuously pumped in preheating pulp tank by water ratio, utilize waste hot steam to carry out preheating pulp to mud or organic solid waste;
Step 102: the mud after preheating pulp or organic solid waste are imported continuously in the hot steam retort under 10 bar-15 bar conditions, the mud in hot steam retort or the pressure in organic solid waste remain on 6 bar-7 and cling to, and temperature remains on 160 DEG C-180 DEG C;
Step 103: the mud in hot steam retort or organic solid waste are pressed in the multiple heat insulation tanks in series connection by pressure difference, pressure in heat insulation tank remains on 5 bar-7 and clings to, temperature remains on 150 DEG C-180 DEG C, mud or organic solid waste are preserved 20 minutes-40 minutes in corresponding heat insulation tank, obvious meeting mineralization pressure between hot steam retort and heat insulation tank is poor, and then promotes mud or organic solid waste and enter continuously among heat insulation tank;
Step 104: then the mud after insulation or organic solid waste are imported pressure release flash tank and carry out pressure release flash distillation process, improve the character of mud further.Unit in foregoing description process, is conventionally described, and is 1 bar=100 kPa.
Passable by foregoing description, pulp thermal pretreatment is carried out to mud or organic solid waste under certain condition, pressurized, heated process, the process of the technique means such as heat-insulation pressure keeping boiling and pressure release flash distillation explosion, viscosity organism in mud and colloidalmaterial are hydrolyzed and crack, and macromolecular substance is converted into small-molecule substance, the organism of part difficult degradation is converted into the organism of the easy degraded of solubility, change character and the structure of mud or organic solid waste, greatly improve biodegradable performance and the dewatering of mud and organic solid waste, for follow-up mud or organic solid waste process provide technical support, the subsequent disposal being convenient to mud or organic solid waste is disposed, and reduce the cost of lignin-sludge or organic solid waste.
Further, also comprise in above-mentioned steps 103: the admission passage of preheating pulp tank is connected with the pressure release flash distillation pipeline of pressure release flash tank, the waste hot steam produced by pressure release flash tank imports the preheating pulp carrying out mud or organic solid waste in preheating pulp tank, and the mud after the process of preheating pulp tank or organic solid waste temperature are 90 DEG C-110 DEG C.And the mud in heat insulation tank or organic solid waste are pressed into continuously, 2-5 heat insulation tanks are in series.
In another preferred embodiment of the present invention, also comprise in above-mentioned steps 102: the mud in hot steam retort or organic solid waste import continuously, pass into hot steam that 10 bar-15 cling in hot steam retort continuously to maintain the mud in retort or the pressure in organic solid waste and remain on 6 bar-7 and cling to, temperature remains on 160 DEG C-180 DEG C, and mud or organic solid waste are constantly from hot steam retort press-in heat insulation tank.Especially preheating pulp tank recycles waste hot steam and carries out preheating pulp, and hot steam retort carries out pressurized, heated by hot steam, and heat insulation tank has been used for heat-insulation pressure keeping boiling, and pressure release flash tank carries out pressure release flash distillation explosion
In order to more detailed description the present invention, below enumerate more detailed embodiment and be described.
Concrete the comprising the following steps of pretreatment process:
Step a: be that municipal sludge or the organic solid waste of 85%-80% is continuously pumped in preheating pulp tank by water ratio, then the waste hot steam utilizing pressure release flash tank to produce carries out pulp thermal pretreatment, the temperature of preheating mud or organic solid waste arrives about 100 DEG C, made the uniform particle sizes of mud and organic solid waste by pulp, thus reduce the viscosity of mud and organic solid waste;
Step b: by the mud after pulp preheating in step a or organic solid waste continus convergence in hot steam retort, the hot steam that 10 bar-15 cling to constantly is passed in hot steam retort, carry out pressurized, heated process, make the mud in hot steam retort or the pressure in organic solid waste maintain 6 bar-7 to cling to, temperature is 160 DEG C-180 DEG C;
Step c: in the mud of pressurized, heated in step b or organic solid waste continus convergence to the multiple heat insulation tanks in series connection, by heat-insulation pressure keeping boiling 20 minutes-40 minutes, viscosity organism in mud and colloidalmaterial are hydrolyzed and crack, and macromolecular substance is converted into small-molecule substance, the organism of part difficult degradation is converted into the organism of the easy degraded of solubility, in heat insulation tank, the pressure and temp of mud is respectively 5 bar-7 bar, 150 DEG C-180 DEG C, and the number of heat-insulation pressure keeping tank is generally 2-5, achieve the continuous operation of whole treating processes,
Steps d: the mud after the heat-insulation pressure keeping boiling in step c or organic solid waste are carried out pressure release flash distillation explosion, macromolecular substance in further broken mud, and the waste hot steam produced in pressure release flash vaporization process is recycled in preheating pulp tank, after pressure release flash distillation explosion, the temperature of mud or organic solid waste is about 100 DEG C, even particle size distribution, good fluidity.Corresponding transferpump can be adopted to realize in the process that above-mentioned product transmits mud or organic solid waste.
Known by foregoing description, the present invention can realize the nearly Continuous Flow process of mud or organic solid waste, thus improve operability and the processing power of technique, mud after treatment or the particle diameter of organic solid waste can be down to original 1/3, and viscosity reduces greatly, thus improve the mobility of mud, biodegradable performance and dewatering improve 30%, be convenient to follow-up process dispose, as can be seen here, the present invention is the tremendous improvement of prior art.
Certainly; more than illustrate and be only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this specification sheets; made all equivalently to substitute, obvious variant, within the essential scope all dropping on this specification sheets, protection of the present invention ought to be subject to.
Claims (1)
1., for a pretreatment process for mud or organic solid waste Continuous Flow, it comprises the following steps:
A, be that the mud of 85%-80% or organic solid waste import in preheating pulp tank continuously by water ratio, by waste hot steam, preheating pulp carried out to mud or organic solid waste;
B, to import the mud after preheating pulp or organic solid waste continuously under 10 bar-15 bar conditions hot steam retort, the mud in hot steam retort or the pressure in organic solid waste remain on 6 bar-7 and cling to, and temperature remains on 160 DEG C-180 DEG C;
C, the mud in hot steam retort or organic solid waste are pressed in the multiple heat insulation tanks in series connection by pressure difference, pressure in heat insulation tank remains on 5 bar-7 and clings to, temperature remains on 150 DEG C-180 DEG C, and mud or organic solid waste are preserved 20 minutes-40 minutes in corresponding heat insulation tank; Then the mud after insulation or organic solid waste are imported pressure release flash tank and carry out pressure release flash distillation process;
Also comprise in above-mentioned steps C: the admission passage of preheating pulp tank is connected with the pressure release flash distillation pipeline of pressure release flash tank, the waste hot steam produced by pressure release flash tank imports the preheating pulp carrying out mud or organic solid waste in preheating pulp tank, and the mud after the process of preheating pulp tank or organic solid waste temperature are 90 DEG C-110 DEG C;
Also comprise in above-mentioned steps C: the mud in heat insulation tank or organic solid waste are pressed into continuously, 2-5 heat insulation tanks are in series;
Also comprise in above-mentioned steps B: the mud in hot steam retort or organic solid waste import continuously, pass into hot steam that 10 bar-15 cling in hot steam retort continuously to maintain the mud in retort or the pressure in organic solid waste and remain on 6 bar-7 and cling to, temperature remains on 160 DEG C-180 DEG C, and mud or organic solid waste are constantly from hot steam retort press-in heat insulation tank;
Preheating pulp tank recycles waste hot steam and carries out preheating pulp, and hot steam retort carries out pressurized, heated by hot steam, and heat insulation tank has been used for heat-insulation pressure keeping boiling, and pressure release flash tank carries out pressure release flash distillation explosion.
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| CN201410310596.5A CN104071956B (en) | 2014-07-01 | 2014-07-01 | A kind of pretreatment process for mud or organic solid waste Continuous Flow |
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| CN104944716A (en) * | 2015-06-04 | 2015-09-30 | 青岛坎比环保能源有限公司 | Medium-pressure superheated steam-based continuous anaerobic sludge digestion pretreatment device and method |
| CN106830587A (en) * | 2017-01-19 | 2017-06-13 | 同济大学 | It is a kind of to strengthen the method for explaining phosphorus containing solid sludge high temperature hot water high |
| CN106904807A (en) * | 2017-03-31 | 2017-06-30 | 同济大学 | A kind of method that phosphorus is reclaimed from dewatered sludge |
| CN108423957B (en) * | 2018-02-07 | 2021-02-02 | 同济大学 | Method for realizing sludge quality-based phase-splitting resource recovery |
| CN110790464B (en) * | 2019-11-14 | 2022-04-08 | 陈玉书 | Agricultural sludge harmless treatment device and method |
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| CN1103254C (en) * | 2000-09-18 | 2003-03-19 | 韩洪波 | Digesting treatment of city domestic garbage and sludge |
| CN102417285B (en) * | 2011-10-20 | 2013-05-01 | 同济大学 | Continuous pyrohydrolysis device and method for high-solid-content biological sludge |
| CN102515466B (en) * | 2012-01-09 | 2013-08-28 | 广西博世科环保科技股份有限公司 | Continuous thermal hydrolysis pretreatment process capable of reinforcing high temperature anaerobic fermentation of residual sludge |
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Inventor after: Zhou Yeyong Inventor after: Liu Shoubao Inventor after: Yu Zhenbin Inventor after: Zhang Jingjing Inventor after: Sun Fei Inventor before: Zhou Yeyong Inventor before: Yu Zhenbin Inventor before: Zhang Jingjing Inventor before: Sun Fei |
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Effective date of registration: 20151026 Address after: 803 room 467-2, No. 266555 middle Changjiang Road, Qingdao economic and Technological Development Zone, Shandong, China Applicant after: Qingdao Si Purun water treatment limited-liability company Address before: 2903 room 230, No. 266555 middle Changjiang Road, Qingdao economic and Technological Development Zone, Shandong, China Applicant before: QINGDAO CHANGHENG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |
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Denomination of invention: Pretreatment method for continuous flow of sludge or organic solid waste Effective date of registration: 20170724 Granted publication date: 20151125 Pledgee: Bank of Qingdao Co economic and Technological Development Zone sub branch Pledgor: Qingdao Si Purun water treatment limited-liability company Registration number: 2017370010041 |
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Date of cancellation: 20190415 Granted publication date: 20151125 Pledgee: Bank of Qingdao Co economic and Technological Development Zone sub branch Pledgor: Qingdao Si Purun water treatment limited-liability company Registration number: 2017370010041 |