CN108298778B - Sludge cell wall breaking system and method based on high-voltage pulse forming line - Google Patents
Sludge cell wall breaking system and method based on high-voltage pulse forming line Download PDFInfo
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- CN108298778B CN108298778B CN201711439166.3A CN201711439166A CN108298778B CN 108298778 B CN108298778 B CN 108298778B CN 201711439166 A CN201711439166 A CN 201711439166A CN 108298778 B CN108298778 B CN 108298778B
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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
Abstract
The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge cell wall breaking system based on a high-voltage pulse forming line, which comprises a stirring device, a wall breaking cylinder, a pulse forming line device, a sludge storage tank and an electrolyte tank; the sludge storage tank and the electrolyte tank are communicated with the stirring device; the mud outlet of the stirring device is communicated with the mud inlet of the wall breaking cylinder, an insulating rod is inserted at the axis of the wall breaking cylinder, and two ends of the insulating rod extend out of the outer cylinder; a metal rod is inserted into the insulating rod; the negative pole and the positive pole of the pulse forming line device are respectively connected with the outer cylinder and the metal rod. The invention also provides a sludge cell wall breaking method based on the high-voltage pulse forming line, which comprises pretreatment tempering, stirring and sludge feeding and high-voltage pulse electric field wall breaking. According to the sludge cell wall breaking system and the sludge cell wall breaking method, the application range of a high-voltage pulse wall breaking technology to sludge types is increased through pretreatment tempering, and the rising edge time of high-voltage pulses is shortened through a pulse forming line device, so that the sludge treatment efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and particularly relates to a sludge cell wall breaking system and a method based on a high-voltage pulse forming line.
Background
The high-voltage pulse technology is used for breaking the cell wall of the sludge, and has been applied to a certain degree at home and abroad, and the main technical principle is that the high-strength electric field generated by the high voltage pulse breaks down the cell wall. The cell wall is induced by electric charge in the instant high-strength electric field, and the substances composing the cell wall are torn under the action of the electric field force, so that the wall breaking effect is achieved. The high-voltage pulse technology is adopted to break the wall of the sludge cells, which is based on the principle. The pulse high voltage is embodied as a pulse high voltage with shorter duration, and the steeper the rising edge of the voltage of the high voltage pulse, the larger the time-dependent change rate of the voltage of the high voltage pulse in the pulse initial stage.
The steeper the rising edge of the high-voltage pulse voltage, the larger the electric field force of the cell wall in the pulse electric field is, and the more obvious the wall breaking effect is. The existing technology for breaking the wall of sludge cells by using high-voltage pulse technology has low wall breaking efficiency, so that the sludge to be treated needs to be exposed in a pulse electric field environment for a long time.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a sludge cell wall breaking system and a method thereof based on a high-voltage pulse forming line, which improve the sludge treatment range and the sludge treatment efficiency.
In order to achieve the above purpose, the technical scheme of the invention is a sludge cell wall breaking system based on a high-voltage pulse forming line, which comprises a stirring device, a wall breaking cylinder, a pulse forming line device, a sludge storage tank and an electrolyte tank; the sludge storage tank and the electrolyte tank are communicated with the stirring device; the mud outlet of the stirring device is communicated with the mud inlet of the broken wall cylinder, an insulating rod is inserted at the axis of the broken wall cylinder, and two ends of the insulating rod extend out of the outer cylinder; a metal rod is inserted into the insulating rod; and the negative electrode and the positive electrode of the pulse forming line device are respectively connected with the outer cylinder and the metal rod.
Further, the outer cylinder is a stainless steel round table-shaped cylinder, and the diameter of the top of the outer cylinder is larger than that of the bottom of the outer cylinder.
Further, the top and the bottom of the outer cylinder are sealed through sealing baffles.
Further, the top of the outer cylinder is provided with a mud inlet, and the bottom of the outer cylinder is provided with a mud outlet.
Further, two ends of the metal rod extend out of two ends of the insulating rod respectively.
Further, the pulse forming line device comprises a high-voltage pulse power supply, wherein the high-voltage pulse power supply is a repeated frequency high-voltage direct-current pulse power supply; the cathode and the anode of the high-voltage pulse power supply are respectively connected with the outer cylinder 5 and the metal rod 1.
The invention also provides a sludge cell wall breaking method based on the high-voltage pulse forming line, which adopts the sludge cell wall breaking system based on the high-voltage pulse forming line, and comprises the following steps:
1) Pretreatment tempering: electrolyte is added into sludge to be treated, and the electrolyte mainly comprises Na 2 SO 4 And NaNO 3 The sludge treatment agent is composed according to a certain proportion, and aims to increase the concentration of cell membranes of microorganisms in the sludge and anions and cations on the surface of cell walls, thereby being beneficial to generating induced charge separation in a high-voltage pulse electric field and improving the strength of induced electric field force;
2) Stirring and mud feeding: stirring the sludge to be treated, removing clear liquid, and conveying the sludge into a wall breaking cylinder through a speed regulating pump and a flowmeter;
3) Breaking the wall of a high-voltage pulse electric field: the negative electrode and the positive electrode of the pulse forming line device are respectively connected with the outer cylinder of the broken cylinder and the metal rod, high-voltage pulse voltage is applied to the broken cylinder, a pulse electric field is generated by the broken cylinder, and the sludge to be treated realizes cell wall breaking under the action of the pulse electric field.
Further, the high voltage pulse processing parameters are: the peak voltage of the pulse direct current high voltage is 10-100kV, the repetition frequency is 1-60kHz, and the duration of the direct current pulse is 0.100-2us.
Further, the pulse forming line device adjusts the rising edge time of the voltage of the pulse direct current high voltage, and the adjusting range is 10-100ns.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the sludge cell wall breaking system based on the high-voltage pulse forming line, provided by the invention, the rising edge time of the high-voltage pulse is shortened through the pulse forming line device, and the sludge treatment efficiency is improved;
(2) According to the sludge cell wall breaking method based on the high-voltage pulse forming line, provided by the invention, the electrolyte is added into the sludge to perform pretreatment tempering, so that the sludge does not need to stand for reaction time, and the application range of the high-voltage pulse wall breaking technology to the types of the sludge is increased.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of a sludge cell disruption system based on a high voltage pulse forming line;
FIG. 2 is a schematic structural diagram of a wall breaking cylinder of a sludge cell wall breaking system based on a high-voltage pulse forming line;
in the figure: 1. metal rod, 2, insulating rod, 3, sealing baffle, 4, mud inlet, 5, broken wall section of thick bamboo, 6, play mud mouth.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-2, the embodiment of the invention provides a sludge cell wall breaking system based on a high-voltage pulse forming line, which comprises a stirring device, a wall breaking cylinder, a pulse forming line device, a sludge storage tank and an electrolyte tank; the sludge storage tank and the electrolyte tank are communicated with the stirring device; the mud outlet of the stirring device is communicated with the mud inlet 4 of the broken wall cylinder 5, an insulating rod 2 is inserted at the axis of the broken wall cylinder 5, and two ends of the insulating rod 2 extend out of the outer cylinder 5; a metal rod 1 is inserted into the insulating rod 2; the negative electrode and the positive electrode of the pulse forming wire device are respectively connected with the outer cylinder 5 and the metal rod 1.
The pulse forming line technology is a technology for storing energy and adjusting waveform of pulse high voltage by using distributed capacitance and stray inductance between lines of a transmission line. The pulse shaping line device is used for reforming and shaping the output voltage waveform. The pulse forming line technology is applied to the high-voltage pulse sludge cell wall breaking, and the rising edge of the high-voltage pulse is properly regulated by regulating the parameters of the pulse forming line and the wall breaking cylinder, so that the pulse forming line has steeper rising edge, and higher high-voltage pulse wall breaking efficiency is realized. The pulse forming line device aims at adjusting the steepness degree of the rising edge of the high-voltage pulse, and is beneficial to high-efficiency wall breaking.
Further, the outer cylinder 5 is a stainless steel truncated cone-shaped cylinder, and the diameter of the top of the outer cylinder 5 is larger than that of the bottom of the outer cylinder 5. Further, the top and the bottom of the outer cylinder 5 are sealed by the sealing baffle 3.
Further, a mud inlet 4 is formed in the top of the outer barrel 5, and a mud outlet 6 is formed in the bottom of the outer barrel 5.
Further, both ends of the metal rod 1 extend out of both ends of the insulating rod 2, respectively.
Further, the pulse forming line device comprises a high-voltage pulse power supply, wherein the high-voltage pulse power supply is a high-voltage direct-current pulse power supply with repeated frequency, the pulse voltage is adjustable, and the repeated frequency is adjustable; the cathode and the anode of the high-voltage pulse power supply are respectively connected with the outer cylinder 5 and the metal rod 1.
The invention also provides a sludge cell wall breaking method based on the high-voltage pulse forming line, which adopts the sludge cell wall breaking system based on the high-voltage pulse forming line, and comprises the following steps:
1) Pretreatment tempering: electrolyte is added into sludge to be treated, so that the concentration of cell membranes of microorganisms and anions and cations on the surface of cell walls in the sludge is increased;
2) Stirring and mud feeding: stirring the sludge to be treated, removing clear liquid, and conveying the sludge into a wall breaking cylinder through a speed regulating pump and a flowmeter;
3) Breaking the wall of a high-voltage pulse electric field: the negative electrode and the positive electrode of the pulse forming line device are respectively connected with the outer cylinder of the broken cylinder and the metal rod, high-voltage pulse voltage is applied to the broken cylinder, a pulse electric field is generated by the broken cylinder, and the sludge to be treated realizes cell wall breaking under the action of the pulse electric field.
In order to increase the electrolyte concentration on the cell membrane and cell wall surface of microorganism and algae substance in the sludge, electrolyte modified according to a certain formula is added into the sludge, the concentration of anions and cations on the cell membrane and cell wall surface of the microorganism and algae substance group is increased by stirring, and the cell membrane or cell wall of the microorganism and algae substance group is subjected to lysis digestion under the action of pulse direct current high voltage.
The broken wall cylinder 5 is a place where the sludge breaks the wall, the sludge flows through the broken wall cylinder, and the pulse high voltage is converted into a pulse electric field through the broken wall cylinder. The outer cylinder of the broken wall cylinder 5 is a stainless steel conical cylinder, a high-voltage insulating rod 2 is inserted into the axis, and a metal rod 1 slightly longer than the broken wall cylinder 5 is inserted into the insulating rod 2. The cathode and anode outgoing lines of the pulse forming line device are respectively connected to the conical cylinder of the wall breaking cylinder 5 and the axis metal rod 1, the conical cylinder is a cathode, the axis metal rod is an anode, the cathode and the anode are isolated by a high-voltage insulating rod, the pretreated and tempered sludge flows between the insulating rod and the wall breaking cylinder, and the flowing direction is from the large diameter direction of the conical cylinder to the small diameter direction. The formed high-voltage pulse cylinder wall and the non-parallel medium between the axial metal rods are transmitted, the pulse wave head is dispersed in the transmission process, and the propagation speed of the high-frequency component is higher than that of the low-frequency component, so that the rising edge of the high-voltage pulse transmitted to the front edge of the wall breaking cylinder is steeper, and the formed pulse electric field is more beneficial to cell lysis and wall breaking. According to different wall breaking cylinder appearance parameters, the voltage rising time of the high voltage pulse can be shortened by 2-20ns.
Further, the high voltage pulse processing parameters are: the peak voltage of the pulse direct current high voltage is 10-100kV, the repetition frequency is 1-60kHz, and the duration of the direct current pulse is 0.100-2us.
Further, the pulse forming line device adjusts the rising edge time of the voltage of the pulse direct current high voltage, and the adjusting range is 10-100ns.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. Sludge cell wall breaking system based on high-voltage pulse forming line, its characterized in that: comprises a stirring device, a wall breaking cylinder, a pulse forming line device, a sludge storage tank and an electrolyte tank; the sludge storage tank and the electrolyte tank are communicated with the stirring device; the mud outlet of the stirring device is communicated with the mud inlet (4) of the wall breaking cylinder (5), the wall breaking cylinder (5) is a stainless steel round table cylinder, the diameter of the mud inlet end of the wall breaking cylinder (5) is larger than that of the mud outlet end of the wall breaking cylinder (5), an insulating rod (2) is inserted at the axis of the wall breaking cylinder (5), and two ends of the insulating rod (2) extend out of the wall breaking cylinder (5); a metal rod (1) is inserted into the insulating rod (2); the negative electrode and the positive electrode of the pulse forming line device are respectively connected with the wall breaking cylinder (5) and the metal rod (1); the pulse forming line device comprises a high-voltage pulse power supply, wherein the high-voltage pulse power supply is a repeated frequency high-voltage direct-current pulse power supply; the negative pole and the positive pole of the high-voltage pulse power supply are respectively connected with the broken wall cylinder (5) and the metal rod (1).
2. The high voltage pulse forming line-based sludge cell wall breaking system as claimed in claim 1, wherein: the top and the bottom of the broken cylinder (5) are sealed by a sealing baffle plate (3).
3. The high voltage pulse forming line-based sludge cell wall breaking system as claimed in claim 1, wherein: the top of broken wall section of thick bamboo (5) is equipped with into mud mouth (4), the bottom of broken wall section of thick bamboo (5) is equipped with out mud mouth (6).
4. The high voltage pulse forming line-based sludge cell wall breaking system as claimed in claim 1, wherein: the two ends of the metal rod (1) extend out of the two ends of the insulating rod (2) respectively.
5. A method for breaking wall of sludge cells based on a high-voltage pulse forming line, which is characterized in that the method adopts the sludge cell wall breaking system as claimed in any one of claims 1 to 4, and comprises the following steps:
1) Pretreatment tempering: electrolyte is added into sludge to be treated, so that the concentration of cell membranes of microorganisms and anions and cations on the surface of cell walls in the sludge is increased;
2) Stirring and mud feeding: stirring the sludge to be treated, removing clear liquid, and conveying the sludge into a wall breaking cylinder through a speed regulating pump and a flowmeter;
3) Breaking the wall of a high-voltage pulse electric field: the negative electrode and the positive electrode of the pulse forming line device are respectively connected with a broken wall cylinder and a metal rod, high-voltage pulse voltage is applied to the broken wall cylinder, a pulse electric field is generated by the broken wall cylinder, and the sludge to be treated realizes cell wall breaking under the action of the pulse electric field.
6. The method for breaking the wall of the sludge cells based on the high-voltage pulse forming wire according to claim 5, wherein the method comprises the following steps: the electrolyte includes Na 2 SO 4 And NaNO 3 。
7. The method for breaking the wall of the sludge cells based on the high-voltage pulse forming wire according to claim 5, wherein the method comprises the following steps: the high voltage pulse processing parameters are as follows: the peak voltage of the pulse direct current high voltage is 10-100kV, the repetition frequency is 1-60kHz, and the duration of the direct current pulse is 0.100-2us.
8. The method for breaking the wall of the sludge cells based on the high-voltage pulse forming wire according to claim 5, wherein the method comprises the following steps: the pulse forming line device adjusts the rising edge time of the pulse direct current high voltage, and the adjusting range is 10-100ns.
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| CN110939417A (en) * | 2018-09-25 | 2020-03-31 | 中国石油化工股份有限公司 | Method for improving oil well yield by coupling pulse waves with microorganisms |
| CN109368959A (en) * | 2018-12-26 | 2019-02-22 | 齐鲁工业大学 | A kind of method of DC additional high pressure impulse electric field processing paper mill sludge |
| CN114685017A (en) * | 2022-04-18 | 2022-07-01 | 太原理工大学 | Sludge pretreatment device and method utilizing pulsed magnetic field in cooperation with Fenton oxidation reaction |
| CN115247116A (en) * | 2022-06-22 | 2022-10-28 | 山西八方综合有限公司 | Processing method of black bean vinegar rich in anthocyanin |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752371A1 (en) * | 1996-11-27 | 1998-06-10 | Kern Martin | Treating municipal sludge |
| KR20040051009A (en) * | 2002-12-11 | 2004-06-18 | (주)대우건설 | Method and device for sludge treatment using high voltage pulse |
| JP2006281120A (en) * | 2005-04-01 | 2006-10-19 | Matsushita Electric Ind Co Ltd | Sludge treatment method and apparatus, and sludge treatment system using this apparatus |
| KR100895122B1 (en) * | 2008-06-05 | 2009-04-28 | 비손푸른엔지니어링 주식회사 | The slimming and anaerobic consumption activity enhancing method and apparatus of the wasted-activated sludge |
| CN102512756A (en) * | 2011-12-06 | 2012-06-27 | 何宗彦 | Method and equipment for generating high-voltage pulse induction currents in object |
| CN105016594A (en) * | 2015-08-12 | 2015-11-04 | 嘉诚环保工程有限公司 | Method for treating nutrient substances in excess sludge and special high-voltage alternating-current pulse sludge decomposition device |
| CN204874227U (en) * | 2015-08-12 | 2015-12-16 | 嘉诚环保工程有限公司 | High voltage pulse mud decomposition device |
| CN207891228U (en) * | 2017-12-27 | 2018-09-21 | 武汉都市环保工程技术股份有限公司 | Sludge cell wall breakage system based on high voltage pulse shaped wire |
-
2017
- 2017-12-27 CN CN201711439166.3A patent/CN108298778B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752371A1 (en) * | 1996-11-27 | 1998-06-10 | Kern Martin | Treating municipal sludge |
| KR20040051009A (en) * | 2002-12-11 | 2004-06-18 | (주)대우건설 | Method and device for sludge treatment using high voltage pulse |
| JP2006281120A (en) * | 2005-04-01 | 2006-10-19 | Matsushita Electric Ind Co Ltd | Sludge treatment method and apparatus, and sludge treatment system using this apparatus |
| KR100895122B1 (en) * | 2008-06-05 | 2009-04-28 | 비손푸른엔지니어링 주식회사 | The slimming and anaerobic consumption activity enhancing method and apparatus of the wasted-activated sludge |
| CN102512756A (en) * | 2011-12-06 | 2012-06-27 | 何宗彦 | Method and equipment for generating high-voltage pulse induction currents in object |
| CN105016594A (en) * | 2015-08-12 | 2015-11-04 | 嘉诚环保工程有限公司 | Method for treating nutrient substances in excess sludge and special high-voltage alternating-current pulse sludge decomposition device |
| CN204874227U (en) * | 2015-08-12 | 2015-12-16 | 嘉诚环保工程有限公司 | High voltage pulse mud decomposition device |
| CN207891228U (en) * | 2017-12-27 | 2018-09-21 | 武汉都市环保工程技术股份有限公司 | Sludge cell wall breakage system based on high voltage pulse shaped wire |
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