CN103964662B - A kind of continous way mud dewatering method based on hydrothermal treatment consists - Google Patents
A kind of continous way mud dewatering method based on hydrothermal treatment consists Download PDFInfo
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Abstract
The present invention relates to a kind of continous way mud dewatering method based on hydrothermal treatment consists, belong to field of sludge treatment.Have high temperature filtrate in the external heat exchanger of this feed unit, mud is continuously introduced into feed unit, and high temperature filtrate is to mud preheating; Mud after preheating enters hydrothermal treatment consists unit under the promotion of feed unit, carries out hydro-thermal reaction by the heating devices heat being located at hydrothermal treatment consists unit outside to more than 150 DEG C; The residence time of mud in hydrothermal treatment consists unit, controlled by its inner booster machinery arranged; Sludge reflux after part hydrothermal treatment consists is to hydrothermal treatment consists unit; Mud after hydrothermal treatment consists unit is introduced into the continuously dehydrating that continous way extrusion dehydration unit realizes hydro-thermal mud, and in dehydration, cavity is in sealed state.This dewatering, on the basis that hydrothermal treatment consists improves sludge structure and physicochemical characteristic, makes full use of while energy efficient input and reclaims the energy, adopts continuous mode to realize mud and dewaters in liquid form.
Description
Technical field
The present invention relates to a kind of continous way mud dewatering method based on hydrothermal treatment consists, be applicable to the processed of various classification mud, be specially adapted to the processed of excess sludge, belong to field of sludge treatment.
Background technology
Mud is the semi-solid product with high-moisture percentage, high organic content, high biological activity feature that stain disease is carrying out producing in decontamination process.Because its output is huge, transportation cost is high, and effective treatment and disposal difficulty is large, creates impact to the sustainable operation of sewage work.Simultaneously the pollutent such as its microorganism of being rich in, heavy metal element, if do not carry out appropriate process, can cause serious secondary pollution to environment and human health.Scientific research and practice have proved to dewater and effectively can solve the problem of sludge treatment difficulty.Current mud dewatering method, such as mechanical dehydration, be difficult to make the water ratio of mud to be reduced to less than 75%, and there is the shortcoming of high energy consumption in the methods such as heat drying, therefore develop a kind of water ratio of mud that can effectively reduce to the requirement meeting final process and dispose, need again the deep dehydration method of less energy consumption input extremely urgent.
This technology proposes a kind of continous way dehydration treatment method being applicable to various classification mud, excess sludge (water ratio > 80%) particularly after mechanical dehydration, improve on the basis of sludge characteristics in hydrothermal treatment consists, mainly achieve removing continuously of moisture by extruding in liquid form, consider backflow strengthening Mass and heat transfer simultaneously, and reclaim the energy preheating mud in filtrate by heat exchange, finally with the input of lower energy consumption, obtain the mud of higher solid content.The filtrate that dehydration produces there is good biodegradability energy, efficient anaerobic digestion is carried out to it and produces after biogas, can Land_use change be carried out.
Summary of the invention
In view of the characteristic of sludge dewatering difficulty, and the subsequent disposal of sludge dewatering to mud and the importance of disposal, the invention provides a kind of continous way mud dewatering method based on hydrothermal treatment consists.Mud after the preheating of high temperature filtrate, makes full use of hydro-thermal effect and improves sludge structure and physicochemical characteristic, and by making the mud after hydrothermal treatment consists carry out partial reflux, enhances the Mass and heat transfer between feed sludge particle.Preheating and backflow significantly shorten the residence time of mud, adopt continous way extrusion dehydration mode simultaneously, realize removing of moisture continuous effective in mud, mud after dehydration due to temperature higher, under the condition of spontaneous evaporation, can realize the further reduction of moisture in mud fast, the high solid content mud obtained is conducive to follow-up process and disposal.The filtrate that dehydration produces there is good biodegradability energy, efficient anaerobic digestion is carried out to it and produces after biogas, carry out Land_use change.
Based on a continous way mud dewatering method for hydrothermal treatment consists, carry out according to the following steps:
1) have high temperature filtrate in the external heat exchanger of feed unit, this high temperature filtrate is from continous way extrusion dehydration unit; Mud introduces feed unit continuously, and high temperature filtrate, to mud preheating, achieves effective utilization of heat energy, improves the temperature of mud, and reduce filtrate temperature.Described mud refers to the mud that Sewage Plant and water purification plant etc. produce or other high-moisture percentage paste mud class materials.
2) mud after preheating enters hydrothermal treatment consists unit under the pushing effect of feed unit, carries out hydro-thermal reaction by the heating devices heat being located at hydrothermal treatment consists unit outside to more than 150 DEG C; Through hydrothermal treatment consists unit, sludge structure and physics-chem characteristic are improved, and mud is obvious fluidization.
3) residence time of mud in hydrothermal treatment consists unit, controlled by booster machinerys such as its inner revolutions speed of screw arranged; Sludge reflux after part hydrothermal treatment consists is to hydrothermal treatment consists unit, enhance the Mass and heat transfer entered in hydrothermal treatment consists unit between mud granule, shorten the mud residence time wherein, return sludge ratio is determined according to the character of mud with to the requirement of dewatered sludge water ratio.
4) mud after hydrothermal treatment consists unit is introduced into the continuously dehydrating that continous way extrusion dehydration unit realizes hydro-thermal mud, because in dehydration, cavity is in sealed state, moisture is mainly removed in liquid form, avoids the heat energy consumption of moisture vaporization, obtains high temperature filtrate.
5) dewatered sludge after continous way extrusion dehydration is higher due to temperature, under the condition of spontaneous evaporation, utilizes self waste heat can realize the further reduction of moisture in mud fast, obtains sludge with low moisture content.
Described continous way extrusion dehydration unit adopt import large outlet little, in have the gradually-reducing shape discharger of spiral, other also can be adopted can to realize the device of continous way extrusion dehydration function.
High temperature filtrate is through the external heat exchanger cooling process of feed unit, and the low temperature filtrate obtained is introduced efficient anaerobic digestion process unit and carried out efficient anaerobic digestion production biogas to it, carries out Land_use change after remaining natural pond liquid is purified by purifying treating unit.
Beneficial effect of the present invention:
Mud is after 150 ~ 250 DEG C of hydrothermal treatment consists, and the physics-chem characteristic of mud granule changes, and the combination of moisture and mud granule can significantly be reduced; The chemical reactions such as larger molecular organics generation deshydroxy, decarboxylation, hydrolysis and polymerization, C and H content significantly increase, and O content reduces, and improves sludge calorific value; Due to moisture percentage in sewage sludge lower than 90% time, mobility can be deteriorated, when after hydrothermal treatment consists, in obvious fluidization.
Hydrothermal treatment consists unit and continous way extrusion dehydration unit are in sealed state, and moisture is mainly extruded with liquid state and removes, and avoid the latent heat of vaporization consumption of moisture evaporation and generation; In fill process, utilize the high temperature filtrate removed to carry out preheating to mud, realize energy recovery, improve mud temperature; Cool the low temperature filtrate obtained through heat exchange, efficient anaerobic digestion is carried out to it and produces biogas, after the purification of natural pond liquid, can Land_use change be carried out.
Hydrothermal treatment consists unit is partly refluxed to the mud after hydrothermal treatment consists, enhances the Mass and heat transfer between mud granule, significantly shorten the residence time of mud; Because in mud, moisture temperature is higher, reduce moisture viscosity, the extruding contributing to moisture removes; Mud after dehydration reduce further water ratio by spontaneous evaporation.
Mud is charging in a continuous manner, and with continous way extrusion dehydration and discharging, the whole dehydration of mud is continuously-running duty, improves dewatering efficiency; The shortening of sludge retention time and the continuity (limit dehydration limit discharging) of extrusion dehydration are basis and the key of carrying out continuously dehydrating.
In sum, this mud dewatering method takes full advantage of the advantage of hydrothermal treatment consists, and in conjunction with continous way extrusion dehydration mode, achieve the continuous operation of dehydration, moisture is mainly removed with liquid state, dewatering efficiency is high, dehydration energy is low, the dewatered sludge of low-water-content is obtained by further spontaneous evaporation, biogas is produced to cooled filtrate efficient anaerobic digestion simultaneously, carry out Land_use change after the liquid purification of natural pond, provide new solution route for urban wastewater treatment firm affects its normal operation due to the problem of excess sludge.
Accompanying drawing explanation
Accompanying drawing is a kind of schema of the continous way mud dewatering method based on hydrothermal treatment consists.
Embodiment
The specific embodiment of the present invention is illustrated below in conjunction with accompanying drawing and technical scheme.
As shown in the figure, the continous way mud dewatering method based on hydrothermal treatment consists that the present invention proposes, comprises the following steps:
1) mud introduces mud by the mode such as spiral or pump continuously to feed unit.
2) from the external heat exchanger of the high temperature filtrate introducing feed unit of continous way extrusion dehydration unit, mud is preheated in fill process, warm up time controls by regulating input speed.
3) mud after preheating enters hydrothermal treatment consists unit under the pushing effect of feeder power, it is sealed environment, mud is made to be heated to 150-250 DEG C by the heating unit being located at hydrothermal treatment consists unit outside, carry out hydro-thermal reaction to improve sludge structure and physics-chem characteristic, mud controlled by regulating its inner revolution speed of screw arranged in the residence time of hydro-thermal reaction unit.
4) through the mud of hydrothermal treatment consists unit, a part is back to hydrothermal treatment consists unit, reflux ratio is determined according to the character of mud with to the requirement of dewatered sludge water ratio, remainder introduces mud continous way extrusion dehydration unit, because in dehydration, cavity is in sealed state, moisture is mainly removed in liquid form, avoids the heat energy consumption of moisture vaporization, obtains high temperature filtrate.Continous way extrusion dehydration unit adopt import large outlet little, in have the gradually-reducing shape discharger of spiral, achieve the continuously dehydrating to the mud through hydrothermal treatment consists introducing continous way extrusion dehydration unit.
5) from the external heat exchanger of the high-temperature liquid state filtrate importing feed unit of continous way extrusion dehydration unit, with preheating mud filtrate cooled, cooled filtrate enters efficient anaerobic digestion process cellular manufacture biogas, and natural pond liquid carries out Land_use change after clean unit.
6) under condition in spontaneous evaporation of the dewatered sludge of continous way extrusion dehydration unit, utilize self waste heat to carry out dehydration by evaporation, water ratio is reduced further, obtain low water-containing sludge.
7) according to 1)-6) step realize continuous operation to sludge dehydration process.
Claims (3)
1., based on a continous way mud dewatering method for hydrothermal treatment consists, it is characterized in that, step is as follows:
1) mud preheating: mud is continuously introduced into feed unit, be fed the high temperature filtrate preheating in unit external heat exchanger, this high temperature filtrate is from continous way extrusion dehydration unit; Described continous way extrusion dehydration unit adopt import large outlet little, in have the discharger of the gradually-reducing shape of spiral;
2) hydro-thermal reaction: the mud after preheating enters hydrothermal treatment consists unit under the pushing effect of feed unit, by being located at the heating devices heat of hydrothermal treatment consists unit outside to more than 150 DEG C, carries out hydro-thermal reaction;
3) accelerate backflow: the residence time of mud in hydrothermal treatment consists unit, controlled by its inner booster machinery arranged; Sludge reflux after part hydrothermal treatment consists is to hydrothermal treatment consists unit, and return sludge ratio is determined according to the character of mud with to the requirement of dewatered sludge water ratio; Described booster machinery is the booster machinery of revolution speed of screw;
4) continuously dehydrating: the mud after hydrothermal treatment consists unit is introduced into the continuously dehydrating that continous way extrusion dehydration unit realizes hydro-thermal mud, and in dehydration, cavity is in sealed state;
5) spontaneous evaporation: the mud after continous way extrusion dehydration, by spontaneous evaporation, utilizes self waste heat to realize the further reduction of moisture in mud, obtains sludge with low moisture content.
2. continous way mud dewatering method according to claim 1, is characterized in that, described mud refers to the mud that Sewage Plant and water purification plant produce or other high-moisture percentage paste mud class materials.
3. continous way mud dewatering method according to claim 1 and 2, it is characterized in that, high temperature filtrate is through the external heat exchanger cooling process of feed unit, the low temperature filtrate obtained is introduced efficient anaerobic digestion process unit and is carried out efficient anaerobic digestion production biogas, carries out Land_use change after remaining natural pond liquid is purified by purifying treating unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996887A (en) * | 2018-08-31 | 2018-12-14 | 四川深蓝环保科技有限公司 | A kind of thickened sludge hydro-thermal treatment method and system |
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| CN105859094B (en) * | 2016-04-28 | 2018-08-03 | 江南大学 | A kind of heat chemistry sludge treating system and its technique |
| CN106732186B (en) * | 2016-12-01 | 2022-10-25 | 西安交通大学 | Reaction kettle, continuous system and method for hydrothermal dehydration treatment of high-water-content organic matters |
| CN108423957B (en) * | 2018-02-07 | 2021-02-02 | 同济大学 | Method for realizing sludge quality-based phase-splitting resource recovery |
| CN109052892B (en) * | 2018-07-27 | 2020-08-18 | 西安交通大学 | Device and method for treating high-water-content organic matter |
| CN110902981B (en) * | 2018-09-10 | 2022-09-23 | 湖南军信环保股份有限公司 | Sludge treatment method |
| CN111908749B (en) * | 2020-08-17 | 2021-09-03 | 薛维晋 | Sludge dry-wet differentiation treatment method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4878079B2 (en) * | 2001-01-23 | 2012-02-15 | 月島機械株式会社 | Water treatment sludge treatment method and treatment apparatus |
| CN102381820A (en) * | 2011-09-20 | 2012-03-21 | 福州开发区三水环保科技有限公司 | Sludge treatment process based on hydrothermal modification technology |
| CN102428044A (en) * | 2009-03-18 | 2012-04-25 | 克莉雅沃特泰科有限公司 | Sludge hydrolysis device, a sludge hydrolysis method using the same, and a contact type of heat exchange unit and steam type of heat exchange unit provided in the sludge hydrolysis device |
| CN103274572A (en) * | 2013-05-28 | 2013-09-04 | 国新天汇环境有限公司 | Treatment method of organic solid waste |
| CN103508648A (en) * | 2013-09-28 | 2014-01-15 | 大连理工大学 | Sludge substance deep dehydrating method based on thermal conditioning coupling filter pressing |
-
2014
- 2014-05-07 CN CN201410191714.5A patent/CN103964662B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4878079B2 (en) * | 2001-01-23 | 2012-02-15 | 月島機械株式会社 | Water treatment sludge treatment method and treatment apparatus |
| CN102428044A (en) * | 2009-03-18 | 2012-04-25 | 克莉雅沃特泰科有限公司 | Sludge hydrolysis device, a sludge hydrolysis method using the same, and a contact type of heat exchange unit and steam type of heat exchange unit provided in the sludge hydrolysis device |
| CN102381820A (en) * | 2011-09-20 | 2012-03-21 | 福州开发区三水环保科技有限公司 | Sludge treatment process based on hydrothermal modification technology |
| CN103274572A (en) * | 2013-05-28 | 2013-09-04 | 国新天汇环境有限公司 | Treatment method of organic solid waste |
| CN103508648A (en) * | 2013-09-28 | 2014-01-15 | 大连理工大学 | Sludge substance deep dehydrating method based on thermal conditioning coupling filter pressing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108996887A (en) * | 2018-08-31 | 2018-12-14 | 四川深蓝环保科技有限公司 | A kind of thickened sludge hydro-thermal treatment method and system |
| CN108996887B (en) * | 2018-08-31 | 2021-09-03 | 四川深蓝环保科技有限公司 | Hydrothermal treatment method and system for concentrated sludge |
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