CN109127136B - Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration - Google Patents

Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration Download PDF

Info

Publication number
CN109127136B
CN109127136B CN201810836731.8A CN201810836731A CN109127136B CN 109127136 B CN109127136 B CN 109127136B CN 201810836731 A CN201810836731 A CN 201810836731A CN 109127136 B CN109127136 B CN 109127136B
Authority
CN
China
Prior art keywords
flue gas
ultra
dust
field
efficiency low
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810836731.8A
Other languages
Chinese (zh)
Other versions
CN109127136A (en
Inventor
李水清
段璐
王述浩
陈晟
阮璇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Original Assignee
Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University filed Critical Tsinghua University
Priority to CN201810836731.8A priority Critical patent/CN109127136B/en
Publication of CN109127136A publication Critical patent/CN109127136A/en
Application granted granted Critical
Publication of CN109127136B publication Critical patent/CN109127136B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/014—Addition of water; Heat exchange, e.g. by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings

Landscapes

  • Electrostatic Separation (AREA)

Abstract

The application provides a super-efficient low temperature electrostatic precipitator based on multi-field is reunited. The ultra-efficient low-temperature electric dust removal device based on multi-field agglomeration comprises a shell, a first dust collection device and a charged agglomeration device. The housing encloses a cavity. The shell is provided with a smoke inlet and a smoke outlet respectively. The first dust collecting device is arranged in the cavity. The first dust collecting device is arranged close to the smoke gas outlet. The charge coalescence device is arranged in the cavity. The charged coagulation device is arranged between the flue gas inlet and the first dust collecting device. The electric coagulation device comprises a spraying device and a pre-charging device.

Description

Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration
Technical Field
The application relates to an electric dust removal device, in particular to an ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration.
Background
In recent years, fine particulate matter (PM 2.5) has attracted considerable attention in view of its great harm to human health and its great influence on the environment and global climate. Coal is the most main primary energy in China, and coal consumed by coal-fired power plants accounts for more than half of the total coal output in China, and is the main source of PM 2.5. Therefore, the control of the emission of PM2.5 in the flue gas of the coal-fired power plant becomes a hot point of attention in the power industry in recent years, and the bottleneck and difficulty of the control are the further improvement of the removal efficiency of the fine particulate matters (PM 1) in the escape window of the existing dust removal facility.
At present, more than 90% of coal-fired power plants in China adopt electrostatic dust collectors to remove dust in flue gas, and particles are charged in an electric field and move to a dust collecting polar plate under the action of the electric field force to be collected. However, because the fine particles (PM 1) in the particle size range of 0.1-1.0 μm are in the weak action region of diffusion charge and field charge, the particle charge is low, and the small-particle-size particles are greatly influenced by the airflow, so that the electrostatic dust collector has poor collection efficiency of the fine particles in the range.
Disclosure of Invention
Therefore, the problem of low removal efficiency of fine particles in the particle size range of 0.1-1.0 mu m is needed, and the ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration is provided.
The application provides a super-efficient low temperature electrostatic precipitator based on multi-field is reunited. The ultra-efficient low-temperature electric dust removal device based on multi-field agglomeration comprises a shell, a first dust collection device and a charged agglomeration device. The housing encloses a cavity. The shell is provided with a smoke inlet and a smoke outlet respectively. The first dust collecting device is arranged in the cavity. The first dust collecting device is arranged close to the smoke gas outlet. The charge coalescence device is arranged in the cavity. The charged coagulation device is arranged between the flue gas inlet and the first dust collecting device. The electric coagulation device comprises a spraying device and a pre-charging device. The spraying device comprises a plurality of rows of spraying pipes and a plurality of nozzles arranged on the outer wall of the spraying pipes. The pre-charging device is arranged between the spraying device and the first dust collecting device.
In one embodiment, the pre-charging device comprises a plurality of spike plate electrodes, the spike plate electrodes comprise a first electrode plate and spikes, and the spikes are arranged on the surface of the first electrode plate.
In one embodiment, the plurality of first electrode plates are parallel to the flow direction of the flue gas from the flue gas inlet to the spike plate electrodes.
In one embodiment, the plurality of spikes are respectively disposed on two side surfaces of the first electrode plate.
In one embodiment, a plurality of the spray pipes are arranged in parallel and spaced from each other.
In one embodiment, the plane of the plurality of nozzles is perpendicular to the flow direction of the flue gas from the flue gas inlet to the spraying device.
In one embodiment, the nozzle is a pressure rotary nozzle.
In one embodiment, the electric charge coagulation device further comprises a coagulation enhancing device which is arranged between the pre-charging device and the first dust collecting device.
In one embodiment, the coagulation enhancing device comprises a plurality of second electrode plates arranged in parallel and at intervals, and the adjacent second electrode plates are used for being connected with two poles of an alternating electric field.
In one embodiment, the ultra-efficient low-temperature electric precipitation device based on multi-field agglomeration further comprises a heat exchange cooling device, and the heat exchange cooling device is arranged between the flue gas inlet and the spraying device.
In one embodiment, the heat exchange and temperature reduction device comprises a plurality of rows of cooling pipes which are arranged in a staggered mode, and the planes of the rows of cooling pipes are perpendicular to the flow direction of flue gas.
In one embodiment, the ultra-high efficiency low-temperature electric precipitation device based on multi-field agglomeration further comprises a second dust collection device, and the second dust collection device is arranged between the heat exchange and cooling device and the spraying device.
In one embodiment, the ultra-efficient low-temperature electric precipitation device based on multi-field agglomeration further comprises a first flue gas uniform distribution device, and the first flue gas uniform distribution device is arranged between the flue gas inlet and the heat exchange and cooling device.
In one embodiment, the ultra-high efficiency low-temperature electric precipitation device based on multi-field agglomeration further comprises a second flue gas uniform distribution device, and the second flue gas uniform distribution device is arranged between the heat exchange and cooling device and the second dust collection device.
In the ultra-high efficiency low-temperature electric dust removal device based on multi-field agglomeration, flue gas directly enters the electric coagulation device after entering the cavity from the flue gas inlet. Through the water transmission of spray pipe transmission extremely behind the nozzle, through atomizer's a plurality of nozzles can spout the liquid drop, the liquid drop is confluent with the dust emergence for the dust absorbs moisture and forms the liquid film, can obviously improve the polarization ability and the electric charge volume of dust, increases the liquid bridge power that capillary action produced between the dust granule. Meanwhile, collision and agglomeration are enhanced among the fine dust with the particle size range of 0.1-1 mu m in the dust under the action of increased liquid bridge force, Brownian motion and turbulent motion, so that agglomeration and growth of the fine dust with the particle size range of 0.1-1 mu m can be promoted, and the surface charge capacity of the fine dust is obviously improved. And the fine dust after collision agglomeration and growth enters the pre-charging device. In the pre-charging device, the micro dust agglomerated and grown up after the action of the spraying device can obtain higher electric charge, so that the micro dust can be removed more easily, and the removal efficiency of the ultra-efficient low-temperature electric dust removal device based on multi-field agglomeration on the micro dust can be greatly improved.
Drawings
Fig. 1 is a schematic overall structure diagram of an ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a spraying device provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a spike plate electrode according to an embodiment of the present disclosure.
Description of the reference numerals
10: shell body
11: hollow cavity
12: flue gas inlet
13: flue gas outlet
20: first dust collecting device
30: charge coagulation device
310: spraying device
311: spray pipe
312: nozzle with a nozzle body
320: pre-charging device
321: long nail plate electrode
322: first electrode plate
323: long nail
330: coagulation enhancing device
331: second electrode plate
40: heat exchange cooling device
410: cooling pipe
50: first flue gas uniform distribution device
60: second dust collecting device
70: second flue gas uniform distribution device
100: ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration
Detailed Description
In order to make the purpose, technical scheme and advantages of the present application more clearly understood, the following description, by way of example, and with reference to the accompanying drawings, further details of the ultra-high efficiency low-temperature electric dust removal device based on multi-field agglomeration are provided. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, the present application provides an ultra-high-efficiency low-temperature electric dust removal device 100 based on multi-field agglomeration, wherein the ultra-high-efficiency low-temperature electric dust removal device 100 based on multi-field agglomeration includes the housing 10, the first dust collection device 20, and the electric charge coagulation device 30. The shell 10 surrounds to form a cavity 11, and the shell 10 is provided with a flue gas inlet 12 and a flue gas outlet 13 respectively. The first dust collecting device 20 is arranged in the cavity 11 and close to the flue gas outlet 13. The electric coagulation device 30 is disposed in the cavity 11. The electric coagulation device 30 is arranged between the flue gas inlet 12 and the first dust collecting device 20. The electric coagulation device 30 includes a spraying device 310 and a pre-charging device 320. The spraying device 310 includes a plurality of rows of spraying pipes 311 and a plurality of nozzles 312 provided on an outer wall of the spraying pipes 311. The pre-charging device 320 is disposed between the spraying device 310 and the first dust collecting device 20.
In this embodiment, an ash hopper is connected to the bottom of the housing 10 to receive the dust removed from the inside of the ultra-high efficiency and low temperature electric dust removing device 100 based on multi-field agglomeration. A plurality of insulators are arranged on the top of the housing 10. The insulator adopts polytetrafluoroethylene material, the conductor has been inserted to the insulator, conductor one end connecting wire in the insulator parts such as electric coagulation device 30, first dust arrester installation 20 and second dust arrester installation 60, the other end passes through high-voltage line connection high voltage power supply etc..
The spraying device 310 includes a plurality of rows of spraying pipes 311 and a plurality of nozzles 312 disposed on the surface of the spraying pipes 311. The plurality of rows of the spraying tubes 311 may be parallel to each other, spaced apart from each other, or staggered with each other, which is not limited herein. The spray pipe 311 is connected to a water supply line, and sprays liquid droplets through the nozzle 312. The outlet direction of the nozzle 312 may be opposite to the incoming flow direction of the flue gas, or may form a certain included angle with the incoming flow direction of the flue gas. The plurality of sets of nozzles 312 may be connected to a high voltage dc power source through wires, or may not be connected to the high voltage dc power source, which is not limited herein.
The first dust collecting device 20 at least comprises a primary electric field. The electric field can be connected with a high-voltage pulse negative power supply, the working voltage of the high-voltage pulse negative power supply is 40 kV-80kV, and the pulse width is 100 ns-300 ns. The high-voltage pulse power supply increases the electronic power charge on the basis of field charge and diffusion charge of the fine particles, increases the charge quantity of the fine particles, and further improves the removal efficiency of the fine particles.
In this embodiment, the flue gas enters the cavity 11 from the flue gas inlet 12 and then directly enters the electric coagulation device 30. Through the water transmission of spray pipe 311 extremely behind nozzle 312, can be through a plurality of nozzles 312 blowout liquid drops, the liquid drop can be for the flue gas humidification for the dust absorbs moisture and forms the liquid film, can obviously improve the polarization ability and the electric charge volume of dust, increases the liquid bridge power that capillary action produced between the dust granule. Thus, collision and agglomeration can be enhanced among the fine dust with the particle size range of 0.1-1 mu m in the dust under the action of increased liquid bridge force, Brownian motion and turbulent motion, so that agglomeration and growth of the fine dust with the particle size range of 0.1-1 mu m can be promoted, and the surface charge capacity of the fine dust is obviously improved. The fine dust after the collision agglomeration and growth enters the pre-charging device 320. In the pre-charging device 320, the fine dust agglomerated and grown by the spraying device 310 can obtain a higher electric charge amount, so that the fine dust can be removed more easily, and the removal efficiency of the ultra-high efficiency low-temperature electric dust removal device 100 based on multi-field agglomeration on the fine dust can be greatly improved.
Referring to fig. 2 and 3, in one embodiment, the precharge device 320 includes a plurality of spike plate electrodes 321, the spike plate electrodes 321 include a first electrode plate 322 and spikes 323, and the spikes 323 are disposed on a surface of the first electrode plate 322.
In this embodiment, the spike plate electrode 321 includes a first electrode plate 322 and spikes 323, and a plurality of spikes 323 are disposed on a surface of the first electrode plate 322. The spikes 323 can also discharge to produce a large number of energetic electrons, which can enhance the high electron concentration of the spike plate electrode 321 and can make the electric field relatively uniform. This allows a substantial portion of the dust particles passing through the pre-charging device 320 to be charged by the pre-charging field. Therefore, the charge capacity of the fine dust can be more effectively increased, and the removal efficiency of the ultra-efficient low-temperature electric dust removal device 100 based on multi-field agglomeration on the fine dust can be greatly improved.
The polarity of the charge of the dust particles in the pre-charging device 320 is opposite to the polarity of the liquid droplets sprayed by the spraying device 310, and is the same as the charge polarity in the first dust collecting device 20. After the dust particles are precharged in the precharging device 320, the dust particles can enter the first dust collecting device 20 for further charging and removal, so that the removal efficiency of the ultra-efficient low-temperature electric dust removal device based on multi-field agglomeration on the dust particles can be increased.
In one embodiment, the plurality of first electrode plates 322 is parallel to the flow direction of the flue gas from the flue gas inlet 12 to the spike plate electrodes 321.
In this embodiment, the plurality of first electrode plates 322 are parallel to the flow direction of the flue gas from the flue gas inlet 12 to the spike plate electrodes 321. Therefore, the flue gas has a relatively stable flow velocity, so that the phenomenon that the dust deposited on the dust collecting pole plate is washed by the eddy current generated when the first electrode plate 322 blocks the flow of the flue gas, and the dust returns to the air flow again can be avoided.
In one embodiment, a plurality of the spikes 323 are respectively disposed on two sides of the first electrode plate 322.
In this embodiment, a plurality of the spikes 323 set up respectively in the both sides face of first electrode board 322 can guarantee that two surfaces of first electrode board 322 all are provided with a plurality ofly can discharge spike 323 makes spike board electrode 321 has stronger and even electric field to make most fine dust particle carry a part of electric charge through adding electric field in advance before getting into electric dust collector and making the dust particle. Therefore, the charge quantity of the fine dust can be effectively increased, and the removal efficiency of the electric dust remover on the fine dust can be greatly improved.
In one embodiment, a plurality of the spray tubes 311 are arranged in parallel and spaced apart from each other.
In this embodiment, the spray pipes 311 are arranged in parallel and spaced apart from each other. Thus, the spray pipe 311 can be uniformly provided with a plurality of nozzles 312 on the plane. Therefore, more dust can collide with the water drops sprayed by the nozzle 312, water molecules are attached to the surface of dust particles, the charge capacity on the surface of the dust particles is improved, and secondary dust raising is inhibited, so that the removal efficiency of the ultra-efficient low-temperature electric dust removal device 100 based on multi-field agglomeration on fine particulate matters is improved.
In one embodiment, the plane of the plurality of nozzles 312 is perpendicular to the flow direction of the flue gas from the flue gas inlet 12 to the spraying device 310.
In this embodiment, the plane of the plurality of nozzles 312 is perpendicular to the flow direction of the flue gas from the flue gas inlet 12 to the spraying device 310. Thus, the outlet direction of the nozzle 312 is opposite to the incoming flow direction of the flue gas, and the flue gas can be fully contacted with the water drops sprayed by the nozzle 312. Therefore, the liquid drops sprayed out from the nozzle 312 can be fully collided and agglomerated with the dust particles, and the agglomeration, growth and removal of the fine dust particles are facilitated.
In one embodiment, the nozzle 312 is a pressure rotary nozzle.
In this embodiment, the nozzle 312 is a pressure rotary nozzle. The pressure rotary nozzle can rotate at a certain angle in the direction opposite to the incoming flow direction of the flue gas. Therefore, the spray range of the nozzle 312 can be ensured to be larger, and the nozzle can act on the fine dust in a larger range, so that sufficient collision and agglomeration between a large amount of dust and the liquid drops can be promoted, the agglomeration and growth of the fine dust are facilitated, and the charge capacity of the fine dust and the removal efficiency in a dust collection device are improved.
In one embodiment, the electrical coalescence device 30 further includes a coalescence enhancing device 330. The coalescence enhancing device 330 is disposed between the pre-charging device 320 and the first dust collecting device 20. In this embodiment, the dust particles will directly enter the coagulation enhancing device 330 after being uniformly charged in the pre-charging device 320. The coalescence enhancing device 330 is arranged in a line plate type structure, and the coalescence enhancing device 330 can be coalesced by pulse charge or an alternating electric field, which is not limited herein. After entering the coagulation enhancing device 330, the fine charged dust particles enhance the agglomeration of the fine particles, and further, the efficiency of removing fine dust in the subsequent ultra-high-efficiency low-temperature electric dust removal device 100 based on multi-field agglomeration can be improved.
In one embodiment, the coagulation enhancing device 330 includes a plurality of second electrode plates 331 disposed in parallel and spaced apart, and the adjacent second electrode plates 331 are used for connecting with two poles of an alternating electric field.
In this embodiment, the fine dust particles will enter the coagulation enhancing device 330 directly after being uniformly charged in the pre-charging device 320. The adjacent second electrode plates 331 of the coalescence enhancing device 330 are connected to two poles of an alternating electric field. Thus, after entering the coagulation enhancing device area 330, the charged dust particles will vibrate back and forth under the action of the alternating electric field, so that the speed difference of particles with different particle diameters is increased, thereby greatly enhancing the agglomeration of fine particles, and further obviously improving the fine dust removal efficiency in the subsequent multi-field agglomeration-based ultra-high-efficiency low-temperature electric dust removal device 100. In addition, the second electrode plates 331 are arranged in parallel and at intervals. When the second electrode plate 331 is parallel to the flow direction of the flue gas from the flue gas to the coagulation enhancing device 330, the flue gas has a relatively stable flow velocity, so that a secondary dust emission phenomenon that the vortex generated when the second electrode plate 331 blocks the flow of the flue gas erodes dust deposited on the dust collecting electrode plate can be avoided.
In one embodiment, the ultra-high efficiency low-temperature electric dust removal device 100 based on multi-field agglomeration further comprises a heat exchange cooling device 40, wherein the heat exchange cooling device 40 is arranged between the flue gas inlet 12 and the spraying device 310.
In this embodiment, the flue gas enters the housing 10 through the flue gas inlet 12 and then directly flows into the heat exchanging and temperature reducing device 40. After the flue gas passes through the heat exchange cooling device 40, the temperature is reduced to 85-100 ℃. SO that SO in the flue gas can be ensured3The formed sulfuric acid vapor is condensed and attached to the surface of the dust particles, the physical properties of the surfaces of the particles are changed, the charge quantity and the driving speed of the particles are improved, the back corona phenomenon is avoided, and SO is realized3And the synergistic efficient removal of fine particles.
In one embodiment, the desuperheating device 40 comprises a plurality of rows of cooling tubes 410, the rows of cooling tubes 410 are staggered, and the plane of the rows of cooling tubes 410 is perpendicular to the flow direction of the flue gas.
In this embodiment, the desuperheating device 40 includes a plurality of rows of cooling tubes 410. The cooling tubes 410 are arranged in a staggered manner, and the plane of the cooling tubes 410 is perpendicular to the flow direction of the flue gas. Therefore, the full contact area between the flue gas and the cooling pipe 410 can be ensured, and the SO in the flue gas is facilitated3Cooling and condensing into sulfuric acid fog drops, thereby promoting collision and agglomeration with fine particles and increasing SO3And the removal efficiency of the fine particles in a subsequent dust collecting device.
In one embodiment, the ultra-high efficiency low-temperature electric dust removal device 100 based on multi-field agglomeration further comprises a second dust collection device 60, and the second dust collection device 60 is arranged between the heat exchange and temperature reduction device 40 and the spraying device 310.
At one isIn the embodiment, the wall plate of the ash bucket connected with the heat exchange cooling device 40 and the second dust collecting device 60 is lined with an ND steel plate, and the ash bucket materials in other areas adopt A3 steel, common cold-rolled carbon steel sheets and steel strips, SO that SO can be prevented3Corrosion due to condensation.
In one embodiment, the second dust collecting device 60 comprises a secondary or tertiary electric field, so that dust particles in the flue gas can be removed more efficiently. The second dust collecting device 60 and the heat exchange cooling device 40 are arranged between the heat exchange cooling device 40 and the spraying device 310. The second dust collecting device 60 is composed of a plurality of parallel polar plates, and the polar plates and the high-voltage electrodes of the second dust collecting device 60 are charged, so that particles are moved towards the dust collecting polar plates under the action of an electric field force. After the flue gas is treated by the second dust collecting device 60, the dust amount in the flue gas is reduced by 60-75%. Thus being more beneficial to the subsequent dust removal setting to carry out targeted removal on the fine dust with the particle size range of 0.1-1 mu m.
In one embodiment, a plurality of the nozzles 312 are connected by wires to a positive high voltage or negative high voltage dc power source. The nozzle 312 can thus eject micron-sized droplets that are either positively or negatively charged. The droplet may have a particle size of 10 μm to 200 μm. The charged micron-sized liquid droplets ejected from the nozzle 312 have an opposite charging polarity to the fine dust in the second dust collecting device 60, so that a certain coulomb force is generated between the fine dust and the liquid droplets ejected from the nozzle 312. Thus greatly promoting the collision and agglomeration of the fine dust and the charged liquid drops under the action of coulomb force, liquid bridge force, Brownian motion and turbulent motion, and further improving the charge capacity of the fine dust and the removal efficiency of the subsequent dust removal device.
In one embodiment, the ultra-efficient low-temperature electric dust removal device 100 based on multi-field agglomeration further comprises a first flue gas uniform distribution device 50 arranged between the flue gas inlet 12 and the heat exchange and temperature reduction device 40.
In this embodiment, the ultra-efficient low-temperature electric dust removal device 100 based on multi-field agglomeration further includes a first flue gas uniform distribution device 50. The first flue gas uniform distribution device 50 is arranged between the flue gas inlet 12 and the heat exchange and cooling device 40. The first flue gas uniform distribution device 50 may be a grating plate, a perforated plate, or the like, and is not limited herein. The first flue gas uniform distribution device 50 can enable the flow of flue gas to be more uniform, and scouring abrasion to subsequent devices can be avoided.
In one embodiment, the ultra-efficient low-temperature electric dust removal device 100 based on multi-field agglomeration further comprises a second flue gas uniform distribution device 70, and the second flue gas uniform distribution device 70 is arranged between the heat exchange and temperature reduction device 40 and the second dust collection device 60.
In this embodiment, the second flue gas uniform distribution device 70 is disposed between the heat exchange and temperature reduction device 40 and the second dust collection device 60. The second flue gas uniform distribution device 70 may be a grating plate, a perforated plate, or the like, and is not limited herein. Therefore, the eddy current in the flue gas passing through the heat exchange and temperature reduction device 40 can be avoided, so that the dust collected on the dust collection pole plate is taken away, secondary raise dust is generated, and the dust removal efficiency of the ultra-high efficiency low temperature electric dust removal device 100 based on multi-field agglomeration is reduced.
The features of the above-described embodiments may be arbitrarily combined, and for the sake of clarity of description, all possible combinations of the features in the above-described embodiments are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. An ultra-efficient low temperature electrostatic precipitator based on many field reunites which characterized in that includes:
the device comprises a shell (10), wherein the shell (10) surrounds to form a cavity (11), and the shell (10) is respectively provided with a flue gas inlet (12) and a flue gas outlet (13);
the first dust collecting device (20) is arranged in the cavity (11) and is close to the flue gas outlet (13);
the electric charge coagulation device (30) is arranged in the cavity (11) and between the flue gas inlet (12) and the first dust collecting device (20), and the electric charge coagulation device (30) comprises:
the spraying device (310) comprises a plurality of rows of spraying pipes (311) and a plurality of nozzles (312) arranged on the outer wall of the spraying pipes (311), wherein the plurality of nozzles (312) are connected to a positive high-voltage or negative high-voltage direct-current power supply through electric wires, and the nozzles (312) are used for spraying micron-sized liquid drops which are positively or negatively charged;
the pre-charging device (320) is arranged between the spraying device (310) and the first dust collecting device (20), the pre-charging device (320) comprises a plurality of spike plate electrodes (321), each spike plate electrode (321) comprises a first electrode plate (322) and a spike (323), the spikes (323) are arranged on the surface of the first electrode plate (322), the charging polarity of the pre-charging device (320) is opposite to that of the spraying device (310), and the charging polarity of the pre-charging device (320) is the same as that of the first dust collecting device (20);
a coalescence enhancing device (330) disposed between the pre-charging device (320) and the first dust collecting device (20), the coalescence enhancing device (330) comprising:
the plurality of second electrode plates (331) are arranged in parallel and at intervals, and the adjacent second electrode plates (331) are used for being connected with two poles of the alternating electric field.
2. The ultra-high efficiency low temperature electric dust removal device based on multi-field agglomeration according to claim 1, wherein a plurality of the first electrode plates (322) are parallel to the flue gas flow direction from the flue gas inlet (12) to the spike plate electrodes (321).
3. The ultra-high efficiency low-temperature electric precipitation device based on multi-field agglomeration of claim 1, wherein a plurality of said spikes (323) are respectively disposed on both sides of said first electrode plate (322).
4. The ultra-high efficiency low temperature electric precipitation device based on multi-field agglomeration of claim 1, wherein a plurality of said spray pipes (311) are arranged in parallel and spaced apart from each other.
5. The ultra-high efficiency low temperature electric dust removal device based on multi-field agglomeration according to claim 1, wherein the plane of the plurality of nozzles (312) is perpendicular to the flow direction of the flue gas from the flue gas inlet (12) to the spraying device (310).
6. The ultra-high efficiency low temperature electric precipitation device based on multi-field agglomeration of claim 1, wherein said nozzles (312) are pressure rotary nozzles.
7. The ultra-high efficiency low-temperature electric dust removal device based on multi-field agglomeration according to claim 1, further comprising a heat exchange cooling device (40), wherein the heat exchange cooling device (40) is arranged between the flue gas inlet (12) and the spraying device (310).
8. The ultra-high efficiency low-temperature electric dust removal device based on multi-field agglomeration according to claim 7, wherein the heat exchange cooling device (40) comprises a plurality of rows of cooling tubes (410), the cooling tubes (410) are arranged in a staggered manner, and the planes of the cooling tubes (410) are perpendicular to the flow direction of flue gas.
9. The ultra-high efficiency low-temperature electric precipitation device based on multi-field agglomeration according to claim 7, further comprising a second dust collecting device (60) arranged between the heat exchange and temperature reduction device (40) and the spraying device (310).
10. The ultra-high efficiency low-temperature electric dust removal device based on multi-field agglomeration according to claim 7, further comprising a first flue gas uniform distribution device (50) arranged between the flue gas inlet (12) and the heat exchange and temperature reduction device (40).
11. The ultra-high efficiency low temperature electric precipitation device based on multi-field agglomeration according to claim 9, further comprising a second flue gas uniform distribution device (70), wherein the second flue gas uniform distribution device (70) is arranged between the heat exchange and temperature reduction device (40) and the second dust collection device (60).
CN201810836731.8A 2018-07-26 2018-07-26 Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration Active CN109127136B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810836731.8A CN109127136B (en) 2018-07-26 2018-07-26 Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810836731.8A CN109127136B (en) 2018-07-26 2018-07-26 Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration

Publications (2)

Publication Number Publication Date
CN109127136A CN109127136A (en) 2019-01-04
CN109127136B true CN109127136B (en) 2020-06-19

Family

ID=64798281

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810836731.8A Active CN109127136B (en) 2018-07-26 2018-07-26 Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration

Country Status (1)

Country Link
CN (1) CN109127136B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109759233B (en) * 2019-01-25 2021-05-18 东南大学 System and method for cooperatively treating desulfurization wastewater and strengthening fine particulate matter agglomeration and removal
CN109806975B (en) * 2019-01-30 2024-03-01 浙江大学 Reinforced uniform discharge device and method
CN111672630B (en) * 2020-05-15 2021-09-03 西安交通大学 Electrostatic smog processing device and method
CN113813732B (en) * 2021-09-29 2022-10-14 南京师范大学 Reinforced coalescence and high-efficiency granular layer filtering device for ultrafine particles
CN116441047B (en) * 2022-09-05 2024-01-16 苏州科技大学 Atomization corona oil smoke waste gas purification device and purification method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133190A (en) * 1991-01-25 1992-07-28 Abdelmalek Fawzy T Method and apparatus for flue gas cleaning by separation and liquefaction of sulfur dioxide and carbon dioxide
CN202590955U (en) * 2011-12-28 2012-12-12 宝山钢铁股份有限公司 Three-area electric coagulation dust catcher
CN203030395U (en) * 2012-12-25 2013-07-03 北京博奇电力科技有限公司 Static condensation low-temperature dust removing system
CN104324805A (en) * 2013-08-20 2015-02-04 石家庄虎林环保设备有限公司 Method for capturing PM2.5 fine particles through water mist charged coagulation for electric precipitation
CN103623927A (en) * 2013-12-04 2014-03-12 河北工业大学 Bipolar prick electric coagulation device
CN105170331A (en) * 2015-08-31 2015-12-23 浙江菲达环保科技股份有限公司 Method for determining inlet flue gas temperature of low-low temperature electrostatic precipitator
CN107138016A (en) * 2017-05-08 2017-09-08 浙江大学 Based on many particulate matter coalescence reunion intensifying devices promoted and method

Also Published As

Publication number Publication date
CN109127136A (en) 2019-01-04

Similar Documents

Publication Publication Date Title
CN109127136B (en) Ultra-high-efficiency low-temperature electric dust removal device based on multi-field agglomeration
CN103768886B (en) Efficient multi-field-coordination fine particulate matter removal device and method
CN101869872B (en) Bipolar charge reinforced fine particle aggregation device
CN108387124B (en) A kind of water fog charge coupling particle modified synergistic electrostatic precipitation system of heat pipe and coordinated desulfurization wastewater treatment
CN204220297U (en) A kind of wet cottrell
CN109759233B (en) System and method for cooperatively treating desulfurization wastewater and strengthening fine particulate matter agglomeration and removal
CN110496704B (en) Bipolar atomizing is fine particles of electric agglomeration device in advance
WO2014014090A1 (en) Wet-type electric dust collection device and dust removal method
CN207605871U (en) A kind of water fog charge coupling particle modified synergistic electrostatic precipitation system of coordinated desulfurization wastewater treatment
CN105032611A (en) Deep control system for multiple pollutants through wet static electricity and reinforced by pre-charging
CN107138016A (en) Based on many particulate matter coalescence reunion intensifying devices promoted and method
CN107175169B (en) Humidification flow equalization pre-charge particulate matter strengthening and removing system
EP2868384B1 (en) Wet electric dust-collecting device and exhaust gas treatment method
CN103495503A (en) Electric coagulation spray dust removal system
CN203750368U (en) Multi-field collaborative efficient removing device for fine particulate matters
CN203972139U (en) A kind of wet cottrell
CN111068451B (en) Device and method for efficiently removing fine particulate matters through temperature and humidity regulation
CN109939530A (en) A kind of particle aggregation device of the charged ultrasonic atomization drop of low temperature plasma
CN212731584U (en) Device of high-efficient desorption of temperature and humidity regulation and control fine particles thing
JP2002159879A (en) Wet electric precipitator and exhaust gas treatment system equipped therewith
CN111097251B (en) Device and method for efficiently removing fine particles in multiple-field subareas
CN204953124U (en) Carry on one's shoulder or back multiple pollutant depth control device of wet -type static that electricity is reinforceed in advance
CN102500188A (en) Wet type electric dust-removing device
CN109174456B (en) Device and method for atomizing wet electrostatic dust collection
CN206688901U (en) Electrostatic coalescence high-efficiency demisting apparatus

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant