CN202785921U - Anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system - Google Patents
Anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system Download PDFInfo
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- CN202785921U CN202785921U CN 201220502524 CN201220502524U CN202785921U CN 202785921 U CN202785921 U CN 202785921U CN 201220502524 CN201220502524 CN 201220502524 CN 201220502524 U CN201220502524 U CN 201220502524U CN 202785921 U CN202785921 U CN 202785921U
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- pyrohydrolysis
- ultrasonic
- thermal hydrolysis
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Abstract
An anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system comprises a mud storage tank, a sludge preheating device, a pyrohydrolysis reacting tank, a steam generation plant and an ultrasonic reactor, wherein sludge pumps are arranged between the mud storage tank and the sludge preheating device and between the sludge preheating device and the pyrohydrolysis reacting tank, a heat exchanger device and the sludge pumps are connected between the pyrohydrolysis reacting tank and the ultrasonic reactor, a heat-return pipe is arranged between the sludge preheating device and the heat exchanger device, and the steam generation plant is connected with the pyrohydrolysis reacting tank through a pipeline which is provided with a valve. According to the anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system, the anaerobic digestion sludge is unitedly pretreated by adopting the pyrohydrolysis and the ultrasonic, thus not only can the hydrolysis rate of the sludge be improved, but also the cracking time of ultrasound can be shortened, energy consumption of pre-treatment can be reduced, and the harmlessness, the reduction and the stabilization of the sludge is better achieved so that recycling is achieved.
Description
Technical field
The utility model relates to and a kind of anaerobically digested sludge is carried out pretreated system, belongs to anaerobically digested sludge preconditioning technique field.
Background technology
The processing that the municipal sewage plant is produced mud is disposed, and main method can be divided at present: 34 kinds of Technologies such as aerobic sigestion, anaerobic digestion, sludge drying, chemically stable, compost, burning and landfill.Contrast anaerobic digestion process, other ﹠ Mud method exist that the power consumption of mud poor stability, technique is high, dewatering performance of sludge is poor, to the problem such as a little less than the deactivation of sex pheromone.By the comprehensive assessment to polytechnic maturity, technological merit and economy, no matter to find to reclaim and all angles of Sustainable development from economy, resource, anaerobic digestion all is an advantage technology.The advantage of anaerobic digestion is that organic matter has produced the energy through digestion, and resistates can be made fertilizer.At present anaerobic digestion has been applied to a plurality of fields, such as the processing of Industrial Wastewater Treatment, municipal wastes and the exploitation of potential energy source.
Anaerobic digestion is that organic substance is decomposed the process that produces methane and carbon dioxide by anerobe under oxygen free condition; anaerobic sludge digestion generally is divided into three phases: hydrolysis stage, product acid phase, product methane phase; wherein hydrolysis stage is considered to the rate-limiting step of anaerobic sludge digestion; major cause is that most of organism are present in the microorganism cells in the mud; the cell walls of microorganism cells is a stable semirigid structure, plays a part Cell protection.Cell walls belongs to the bio-refractory inert substance, and the cell walls hydrolysis is difficulty comparatively, causes the long time of anaerobic sludge digestion process need.In practice, traditional anaerobic sludge digestion technology exists also that speed of response is slow, sludge retention time is long, the problems such as the pond body is huge, operational administrative is complicated, fermentation period long (20～30 days).
Summary of the invention
Slow for the speed of response that existing traditional anaerobic sludge digestion technology exists, power consumption is high, treatment cycle is long, the pond body is bulky, operational administrative is complicated, shortcomings such as methane content is low in the aerogenesis, the utility model provides anaerobically digested sludge thermal hydrolysis and the ultrasonic combined pretreated system that a kind of process is simple, energy consumption is low, anaerobic digestion efficient is high.
Anaerobically digested sludge thermal hydrolysis of the present utility model and ultrasonic combined pretreatment system, by the following technical solutions:
This system, comprise storage mud tank, mud primary heater unit, thermal hydrolysis retort, steam-generating installation and ultrasound reactor, between storage mud tank and the mud primary heater unit and all be connected with sludge pump between mud primary heater unit and the thermal hydrolysis retort, be connected with heat exchanger and sludge pump between thermal hydrolysis retort and the ultrasound reactor, be provided with product heat cal rod between mud primary heater unit and the heat exchanger, steam-generating installation is connected with the thermal hydrolysis retort by establishing valvular pipeline.
Said system is during to the anaerobically digested sludge pre-treatment, utilize first the thermal hydrolysis retort to carry out thermal hydrolysis, carry out ultrasonication by ultrasound reactor again, utilize thermal hydrolysis and hyperacoustic array mode can obviously be better than the individual curing method of ultrasonic wave or thermal hydrolysis to the disintegration effect of mud, through overheated and ultrasonic combined pre-treatment, can well change the every physico-chemical property of mud, reduced sludge volume, significantly strengthened the dewatering of mud, improved the surge capability of digested sludge, make mud more stable, stink reduces, and the reduce mud hydrolysis time, shortens the anaerobic digestion cycle, improve the sludge biogas production amount, anaerobic digestion efficient is greatly improved.
The utility model adopts thermal hydrolysis and ultrasonic wave to the anaerobically digested sludge combined pretreatment, not only can improve the hydrolysis rate of mud, and can lack the time of ultrasonic disintegration, reduce pretreated energy consumption, can make mud better accomplish innoxious, minimizing, stabilization, and reach resource utilization.
Description of drawings
Accompanying drawing is system architecture schematic block diagram of the present utility model.
Wherein: 1, storage mud tank, 2, the mud primary heater unit, 3, the thermal hydrolysis retort, 4, steam-generating installation, 5, valve, 6, pipeline, 7, heat exchanger, 8, ultrasound reactor, 9, sludge pump, 10, sludge pump, 11, product heat cal rod, 12, sludge pump.
Embodiment
As shown in drawings, anaerobically digested sludge thermal hydrolysis of the present utility model and ultrasonic combined pretreatment system comprise storage mud tank 1, mud primary heater unit 2, thermal hydrolysis retort 3, steam-generating installation 4 and ultrasound reactor 8, storage mud tank 1, mud primary heater unit 2, thermal hydrolysis retort 3 and ultrasound reactor 8 are existing general-purpose equipment, and steam-generating installation 4 adopts existing steam boiler.The tank body top of thermal hydrolysis retort 3 is provided with pressure release valve, and top is provided with opening for feed, and the opening for feed place establishes feed valve, and the bottom is provided with discharging hopper, and the bottom of discharging hopper is provided with discharge valve.Be connected with sludge pump 9 between storage mud tank 1 and the mud primary heater unit 2, be connected with sludge pump 10 between mud primary heater unit 2 and the thermal hydrolysis retort 3, be connected with heat exchanger 7 and sludge pump 12 between thermal hydrolysis retort 3 and the ultrasound reactor 8.Heat exchanger 7 adopts existing interchangeable heat switching equipment.Be provided with product heat cal rod 11 between mud primary heater unit 2 and the heat exchanger 7 simultaneously.Steam-generating installation 4 is connected with thermal hydrolysis retort 3 by pipeline 6, and pipeline 6 is provided with valve 5.
It is as described below that said system is carried out pretreated detailed process to anaerobically digested sludge:
Pump into mud primary heater unit 2 by sludge pump 9 after mud is concentrated in storage mud tank 1, by product heat cal rod 11 steam in the heat exchanger 7 is back in the mud primary heater unit 2 simultaneously, utilize the steam waste heat in the heat exchanger 7 to mix with mud, make the temperature of mud be elevated to 50 ℃-60 ℃.
Then the mud after preheating is pumped in the thermal hydrolysis retort 3 by sludge pump 10, the sludge volume that pumps into is no more than 1/2nd of tank interior volume, valve 5 on the opening conduits 6, make hot steam continue to enter in the thermal hydrolysis retort 3, thermal hydrolysis retort 3 interior temperature are controlled at 118 ℃-122 ℃, pressure reaches 3 normal atmosphere, and the lower maintenance of this temperature and pressure 30 minutes.Mud through high temperature, can make the microorganism flco disintegrate in the thermal hydrolysis retort, and the cell partial rupture is released in conjunction with water in organic substance and the cell in the mud.
Enter in the ultrasound reactor 8 by sludge pump 12 again behind over-heat-exchanger at thermal hydrolysis retort 3 interior mud after thermal hydrolysis is processed, carry out ultrasonication, ultrasonic wave cracks the mud flco by cavatition and pyrolysis in the treating processes, and low-frequency ultrasonic wave is to the decomposition better effects if of mud.Ultrasonic wave can produce periodic extruding to the medium in the liquid in the low frequency situation, thereby produce large hole bubble, when the hole bubble reaches certain volume, then can break and produce strong water flow jet, and in liquid, produce very strong shearing force when spraying, this strength is easy to break cell walls and makes VOCs emission, through the mud of ultrasonication, the effect that cracks of its cell walls will be more thorough.
Use thermal hydrolysis and the strengthening effect of hyperacoustic associating mud, can destroy microbial cell structure and cell walls in the mud, mud flco structure is changed, intracellular inclusion stripping, enter water, fast hydrolyzing is micromolecular compound under the effect of extracellular enzyme, Effective Raise anaerobic sludge digestion efficient.Directly enter the anaerobic digestion reactive system through the mud after thermal hydrolysis and the ultrasonication.
Claims (1)
1. an anaerobically digested sludge thermal hydrolysis and ultrasonic combined pretreatment system, comprise storage mud tank, mud primary heater unit, thermal hydrolysis retort, steam-generating installation and ultrasound reactor, it is characterized in that: between storage mud tank and the mud primary heater unit and all be connected with sludge pump between mud primary heater unit and the thermal hydrolysis retort, be connected with heat exchanger and sludge pump between thermal hydrolysis retort and the ultrasound reactor, be provided with product heat cal rod between mud primary heater unit and the heat exchanger, steam-generating installation is connected with the thermal hydrolysis retort by establishing valvular pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502524 CN202785921U (en) | 2012-09-27 | 2012-09-27 | Anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502524 CN202785921U (en) | 2012-09-27 | 2012-09-27 | Anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system |
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| CN202785921U true CN202785921U (en) | 2013-03-13 |
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| CN 201220502524 Expired - Lifetime CN202785921U (en) | 2012-09-27 | 2012-09-27 | Anaerobic digestion sludge pyrohydrolysis and ultrasonic united pre-treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052880A (en) * | 2018-09-06 | 2018-12-21 | 昆山绿威环保科技有限公司 | Oily sludge ultrasonic heat hydrolysis combination dewatering |
| CN109748470A (en) * | 2017-11-02 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of method of microbiological treatment excess sludge |
-
2012
- 2012-09-27 CN CN 201220502524 patent/CN202785921U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748470A (en) * | 2017-11-02 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of method of microbiological treatment excess sludge |
| CN109052880A (en) * | 2018-09-06 | 2018-12-21 | 昆山绿威环保科技有限公司 | Oily sludge ultrasonic heat hydrolysis combination dewatering |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |