CN210874650U - Embedded electrostatic precipitator defroster - Google Patents

Embedded electrostatic precipitator defroster Download PDF

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Publication number
CN210874650U
CN210874650U CN201921762994.5U CN201921762994U CN210874650U CN 210874650 U CN210874650 U CN 210874650U CN 201921762994 U CN201921762994 U CN 201921762994U CN 210874650 U CN210874650 U CN 210874650U
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China
Prior art keywords
dust
demisting
power supply
mist
shell
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CN201921762994.5U
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Chinese (zh)
Inventor
刘源
李东阳
张凯
白小锋
刘玺璞
段荣明
董锋
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Xian Thermal Power Research Institute Co Ltd
Xian Xire Boiler Environmental Protection Engineering Co Ltd
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Thermal Power Research Institute
Xian Xire Boiler Environmental Protection Engineering Co Ltd
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Priority to CN201921762994.5U priority Critical patent/CN210874650U/en
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Abstract

The utility model discloses an embedded electrostatic dust removal demister, which comprises a shell, a high-voltage power supply and a plurality of dust and mist removal components arranged in the shell, wherein each mist and dust removal component comprises a discharge electrode and a dust and mist collection device, one side of the shell is provided with an air inlet, and the other side of the shell is provided with an air outlet; from the direction of the air inlet to the air outlet, all the demisting and dedusting components are distributed in sequence, and discharge electrodes and dust collecting and demisting devices in all the demisting and dedusting components are distributed in sequence; the high-voltage power supply is connected with the discharge electrodes in the demisting and dedusting components, and the dust remover has small resistance and small arrangement space.

Description

Embedded electrostatic precipitator defroster
Technical Field
The utility model belongs to the environmental protection field relates to a dust removal defroster, concretely relates to embedded electrostatic precipitator defroster.
Background
Along with implementation of coal-electricity energy-saving emission-reduction upgrading and reconstruction action plans (2014-2020) and strict requirements of governments in various places on ultra-low emission, emission concentration of smoke dust at inlet of chimney of coal-fired unit must reach ultra-low emission level (less than or equal to 5 mg/m)3) The current common technical route is low-temperature electric dust remover, desulfurization and dust removal in coordination, and a newly-added wet-type electric dust remover.
The low-low temperature electric precipitator and desulfurization are used for removing dust in a synergic manner, a flue gas cooler is arranged in front of an electrostatic precipitator, the electrostatic precipitator is correspondingly modified, a desulfurization tower spray layer and a demister are optimally designed, and the main principle is that most SO is used3The smoke is condensed and fully adsorbed and trapped by smoke (the temperature of the smoke at the outlet of the smoke cooler is lower than the acid dew point temperature and works in a high-ash area) in the smoke cooling process, so that the particle size of the smoke is increased, the specific resistance is reduced, and the dust removal efficiency of the electrostatic dust remover is greatly improved; through rear portion wet flue gas desulfurization system optimal design, if increase defroster progression or add high-efficient defroster etc. improve flue gas treatment system's dust collection efficiency, ensure to reach the minimum emission requirement. The device has the advantages that the device has the defects that the high-efficiency demister needs to be additionally arranged for ensuring the dust removal efficiency of the desulfurization system, the resistance of the device is inevitably increased, the requirement on the preceding stage dust removal device is high, and the influence factors on the operation effect are more.
The wet-type electric dust collector is used for removing dust by conveying direct current negative high voltage to an electric field space, dust particles and fog drop particles in smoke are collected on the surface of a dust collecting pole under the action of electric field force after being charged through space gas ionization, and dust is washed and removed by utilizing a continuous water film formed on the surface of the dust collecting pole and regular spraying washing. Because the device works in a saturated wet flue gas environment, the corona discharge condition is improved; meanwhile, the existence of liquid drops and the lower temperature of the flue gas reduce the specific resistance of dust; in addition, the wet electric dust collector is not provided with a rapping device, so that negative effects on dust removal effects caused by secondary dust raising are avoided, and the ultra-low emission requirement can be met. The defect is that a set of equipment needs to be added, a larger arrangement space is needed no matter what arrangement mode, and the increased resistance is larger.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an embedded electrostatic precipitator defroster, the resistance of this dust remover is little, and it is less to arrange the space.
In order to achieve the purpose, the embedded electrostatic dust and mist removal device comprises a shell, a high-voltage power supply and a plurality of dust and mist removal components arranged in the shell, wherein each mist and dust removal component comprises a discharge electrode and a dust and mist collection device;
from the direction of the air inlet to the air outlet, all the demisting and dedusting components are distributed in sequence, and discharge electrodes and dust collecting and demisting devices in all the demisting and dedusting components are distributed in sequence;
the high-voltage power supply is connected with discharge electrodes in the demisting and dedusting components.
The device also comprises a catchment water drop self-flowing and timing washing device used for washing the dust collecting and demisting device in each demisting and dedusting component.
The distance between the discharge electrode and the dust-collecting defogging device in the same dedusting and defogging component is 500mm-700 mm.
The high-voltage power supply is a constant-current power supply or a high-efficiency power supply.
The utility model discloses following beneficial effect has:
embedded electrostatic precipitator defroster when concrete operation, dust and droplet in the discharge electrode to the flue gas carry out the electricity in advance to fine dust and droplet and carry out the electricity coagulation, later under the effect of electric field force, inertia striking and centrifugal force, lay dust and droplet and collect dirt defogging device surface, dust removal defogging is effectual, needs explain, the utility model discloses an electric field effect carries out the electricity coagulation to fine dust and droplet and changes dust and droplet movement track, improves inertia striking dust removal defogging effect greatly. Additionally the utility model discloses only need arrange in former desulfurization defroster position department, utilize original space to adopt one-level or multistage to arrange, do not produce big influence to original structure, do not need new space of arranging for wet-type electrostatic precipitator, can save one-level defroster at least for conventional defroster and arrange the space. Compared with a wet electric dust collector, the resistance can be reduced by about 250Pa because a set of dust removing equipment is not additionally arranged; compared with the conventional demister, the resistance can be reduced by about 100Pa due to the reduction of the arrangement stages of the dust collecting device.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a shell, 2 is a high-voltage power supply, 3 is a device for automatically collecting and washing water drops at fixed time, 4 is a device for collecting dust and demisting, and 5 is a discharge electrode.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the embedded electrostatic dust and mist eliminator of the present invention comprises a casing 1, a high voltage power supply 2 and a plurality of dust and mist removing components arranged in the casing 1, each of the dust and mist removing components comprises a discharge electrode 5 and a dust and mist collecting device 4, one side of the casing 1 is provided with an air inlet, and the other side of the casing 1 is provided with an air outlet; from the direction of the air inlet to the air outlet, all the demisting and dedusting components are distributed in sequence, and discharge electrodes 5 and dust collecting and demisting devices 4 in all the demisting and dedusting components are distributed in sequence; the high-voltage power supply 2 is connected with the discharge electrodes 5 in each demisting and dedusting component.
The utility model also comprises a catchment water drop self-flowing and timing washing device 3 which is used for washing the dust collecting and demisting device 4 in each demisting and dedusting component; the distance between the discharge electrode 5 and the dust-collecting defogging device 4 in the same dedusting defogging component is 500mm-700 mm; the high-voltage power supply 2 is a constant-current power supply or a high-efficiency power supply.
The utility model discloses install in the top of desulfurizing tower, at specific during operation, discharge electrode 5 carries out the precharge to dust and droplet in the flue gas to carrying out the electricity to fine dust and droplet and congealing, later under the effect of electric field force, inertia striking and centrifugal force, spread dust and droplet and collect 4 surfaces of dust arrester installation, discharge through the gas outlet at last, wherein, wash defogging installation 4 that gather dust through entrapment water droplet gravity flow and regularly washing unit 3.
The arrangement series and the polar matching form of the discharge electrodes 5 are adjusted according to the efficiency requirement, the dust collecting and demisting device 4 in the demisting and dedusting assembly is adjusted according to the arrangement series and the homopolar distance (40mm-100mm), and the discharge electrodes 5 are made of titanium alloy or 2205.

Claims (4)

1. An embedded electrostatic dust and mist removal device is characterized by comprising a shell (1), a high-voltage power supply (2) and a plurality of dust and mist removal components arranged in the shell (1), wherein each mist and dust removal component comprises a discharge electrode (5) and a dust and mist removal device (4), an air inlet is formed in one side of the shell (1), and an air outlet is formed in the other side of the shell (1);
from the direction of the air inlet to the air outlet, all the demisting and dedusting components are distributed in sequence, and discharge electrodes (5) and dust collecting and demisting devices (4) in all the demisting and dedusting components are distributed in sequence;
the high-voltage power supply (2) is connected with the discharge electrodes (5) in the demisting and dedusting components.
2. The embedded electrostatic precipitator demister of claim 1, further comprising a self-flowing and timed washing device (3) for washing the collected water droplets in the dust collecting and demisting device (4) of each demisting and dedusting assembly.
3. The embedded electrostatic dust and mist eliminator according to claim 1, wherein the distance between the discharge electrode (5) and the dust and mist eliminator (4) in the same dust and mist eliminator is 500mm-700 mm.
4. The embedded electrostatic precipitator demister of claim 1, wherein the high voltage power supply (2) is a constant current power supply or a high efficiency power supply.
CN201921762994.5U 2019-10-18 2019-10-18 Embedded electrostatic precipitator defroster Active CN210874650U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921762994.5U CN210874650U (en) 2019-10-18 2019-10-18 Embedded electrostatic precipitator defroster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921762994.5U CN210874650U (en) 2019-10-18 2019-10-18 Embedded electrostatic precipitator defroster

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CN210874650U true CN210874650U (en) 2020-06-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110585845A (en) * 2019-10-18 2019-12-20 西安热工研究院有限公司 Embedded electrostatic precipitator defroster

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110585845A (en) * 2019-10-18 2019-12-20 西安热工研究院有限公司 Embedded electrostatic precipitator defroster
WO2021073566A1 (en) * 2019-10-18 2021-04-22 西安热工研究院有限公司 Embedded electrostatic de-dusting and de-fogging device

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