CN217725857U

CN217725857U - Ultralow-emission electric dust remover

Info

Publication number: CN217725857U
Application number: CN202220808109.8U
Authority: CN
Inventors: 赵海宝; 吕自强; 胡小鑫; 何毓忠; 章干养
Original assignee: Zhejiang Feida Environmental Science and Technology Co Ltd
Current assignee: Zhejiang Feida Environmental Science and Technology Co Ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-11-04
Anticipated expiration: 2032-04-08

Abstract

The utility model provides an ultra-low discharge electrostatic precipitator, include entrance point, a plurality of dust removal electric field, the exit end that sets gradually along the flue gas treatment direction, set up cathode system and anode system in each dust removal electric field to and set up in the ash bucket of each dust removal electric field bottom, the inside dust removal flow straightener that is equipped with of entrance point, be equipped with the wave form mechanism of gathering dust in advance on the dust removal flow straightener, the wave form is gathered dust the mechanism in advance and is included the wave form piece that a plurality of groups arranged along electric field width direction interval, has airflow channel between the adjacent wave form piece, and each wave form piece includes V type net piece to and set up in the outside air current of buckling the extension of V type net piece rear end and disperse the net piece, cathode system is provided with at least one netted auxiliary electrode negative pole subassembly respectively at the front end and the tail end of each electric field, and this ultra-low discharge electrostatic precipitator can reduce the energy consumption ratio, realizes the ultra-low discharge of flue gas particulate matter.

Description

Ultralow-emission electric dust remover

[ technical field ] A method for producing a semiconductor device

The utility model relates to a technical field that the flue gas pollutant was administered, especially an ultralow emission electrostatic precipitator.

[ background of the invention ]

Along with the large-area implementation of ultra-low emission of coal-fired flue gas and industrial waste gas dust, the electric dust remover is applied in a large area due to the advantages of simple maintenance, low cost, no secondary pollution and the like.

The import loudspeaker of current electrostatic precipitator only plays the effect of connecting flue and electrostatic precipitator, and the space waste is great, and the centre generally sets up the porous guide plate of three-layer, only plays the effect that the flue gas flow equalizes and does not have the function of gathering dust. In addition, in order to ensure the ash discharging performance of an ash bucket of an electric dust collector, the existing dust removing system is generally provided with a heat insulation layer outside the ash bucket, and a plate type electric heater or a steam heater is arranged between the heat insulation layer and an ash bucket steel plate, so that the ash temperature is ensured to be higher than 90 ℃, and the flowability of ash is ensured. However, when the electric heating is adopted, the heating power of each ash bucket needs more than 20kW, the power consumption is high, and the service power rate of the whole electric dust collector is greatly improved. When steam heating is adopted, the stability of equipment such as a valve, high-pressure steam, drainage and the like is poor, the problems of steam leakage, drainage pollution and the like are easily caused, and the maintenance difficulty is high.

Meanwhile, under the policy of 'carbon peak reaching and carbon neutralization' in China in recent years, the large-scale development of clean energy has been encouraged in China, a coal-fired unit gradually changes from a dominant position to a direction of regulating and controlling a power supply in the energy industry, and meanwhile, the gradual starting and increasing of doped combustion renewable biomass energy also becomes a trend. The problems of reduced ash fluidity, reduced electric dust removal efficiency and the like are caused by biomass blending combustion and low specific load of 15%.

The prior art has the following defects:

1 present electrostatic precipitator air current distribution device all does not gather dust the function, and space utilization is not enough, generally need increase to set up the gravity settling chamber under the high condition of electrostatic precipitator dust concentration, and is with high costs, needs extra place.

2 current electric precipitation import loudspeaker do not set up different ash discharge angles according to air velocity, and occupation space is big to the import loudspeaker that ordinary steel sheet is constituteed is not enough to the slidability of ash, especially uses behind a period steel sheet corrosion or the glutinous ash, and the ash discharge performance is poor.

3 the cathode system of the existing electric dust collector generally has no dust collecting function, so that a large amount of positively charged dust in the smoke can not be effectively collected by the electric dust collector, and the concentration of the outlet dust can not be stably controlled at 10mg/m ³ The following.

[ Utility model ] content

The utility model aims at solving the problem in the prior art, providing an ultralow emission electrostatic precipitator can reduce the energy consumption ratio, realizes the ultralow emission of flue gas particulate matter.

In order to realize the above-mentioned purpose, the utility model provides an ultra-low discharge electrostatic precipitator, include entrance point, a plurality of dust removal electric field, the exit end that sets gradually along the flue gas treatment direction, set up cathode system and anode system in each dust removal electric field to and set up in the ash bucket of each dust removal electric field bottom, the inside dust removal flow straightener that is equipped with in advance of entrance point, be equipped with the wave form mechanism that gathers dust in advance on the dust removal flow straightener, the wave form is gathered dust the mechanism in advance and is included the wave form piece that a plurality of groups arranged along electric field width direction interval, has airflow channel between the adjacent wave form piece, and each wave form piece includes V type net piece to and set up in the outside air current that buckles the extension of V type net piece rear end and disperse the net piece, cathode system is provided with at least one netted auxiliary electrode cathode assembly respectively at the front end and the tail end of each electric field.

Preferably, the waveform sheet of the waveform pre-dust-collecting mechanism includes a plurality of left-side waveform sheets and right-side waveform sheets which are respectively arranged on the left side and the right side of the width direction of the inlet end, the airflow dispersing net sheet at the rear end of the left-side waveform sheet is arranged towards the left to disperse the airflow passing through the airflow channel towards the left, and the airflow dispersing net sheet at the rear end of the right-side waveform sheet is arranged towards the right to disperse the airflow passing through the airflow channel towards the right.

Preferably, the V-shaped mesh and the airflow dispersion mesh are prismatic mesh plates with the aperture ratio of 45% -50%.

Preferably, a rapping dust cleaning device is arranged on the waveform pre-dust collection mechanism.

Preferably, the pre-dedusting flow equalizing device comprises a first guide plate, a waveform pre-dedusting mechanism and a second guide plate which are sequentially arranged along the flue gas treatment direction, and the first guide plate and the second guide plate are flat plates with a plurality of openings.

Preferably, the cathode assembly of the mesh-shaped auxiliary electrode comprises a middle framework, a metal mesh arranged on the middle framework, and auxiliary barbed wires arranged on two sides of the middle framework.

Preferably, the cathode system further comprises a cathode frame and a plurality of groups of barbed wires arranged on the cathode frame, wherein 1-2 mesh auxiliary electrode cathode assemblies are respectively arranged at the front end and the tail end of the cathode frame in the electric field, and the plurality of groups of barbed wires are arranged in the middle of the electric field.

Preferably, the inner surface of the ash bucket and/or the inner surface of the lower ash discharge surface of the inlet end are/is provided with a coating, and the coating adopts an organic silicon compound.

Preferably, the inlet end adopts a multi-section structure and comprises a first-stage slope section and a second-stage slope section which are sequentially arranged along the flue gas treatment direction, the ash discharging angle between the lower ash discharging surface of the first-stage slope section and the horizontal plane is 36-42 degrees, and the ash discharging angle between the lower ash discharging surface of the second-stage slope section and the horizontal plane is 45-48 degrees.

Preferably, the inlet end further comprises a lower horizontal section disposed at the inlet end, and the lower side surface of the lower horizontal section is a horizontal surface.

The utility model has the advantages that:

1. the energy consumption is lower than that of the conventional electric dust collector, and compared with the equipment adopting ash bucket electric heating, the electric dust collector matched with a 1000MW coal-fired unit is taken as an example, and the power consumption can be reduced by about 600 kW.

2. The inlet end has the function of pre-dedusting, can efficiently collect positively charged dust in the flue gas, and the dust concentration at the outlet of the electric dust collector can be stably controlled at 10mg/m ³ In the following, the ultra-low emission of flue gas particles can be directly realized under the condition that the downstream is not matched with wet desulphurization or a wet electric dust collector.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic view of the internal structure of an ultra-low emission electric precipitator of the present invention;

FIG. 2 is a top view of the internal structure of the inlet end of an ultra-low emission electrostatic precipitator of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure at B in FIG. 2;

FIG. 5 is a schematic structural view of a cathode system of an ultra-low emission electrostatic precipitator according to the present invention;

fig. 6 is a left side view of the mesh-type auxiliary electrode cathode assembly of the ultra-low emission electrostatic precipitator of the present invention.

[ detailed description ] embodiments

Referring to fig. 1 to 6, the utility model relates to an ultra-low emission electrostatic precipitator, include entrance point 10, a plurality of dust removal electric field 20, the exit end 30 that sets gradually along the flue gas treatment direction, set up cathode system 4 and anode system (only draw cathode system 4 in the electric field in fig. 1) in each dust removal electric field 20 to and set up in the ash bucket 40 of each dust removal electric field 20 bottom, entrance point 10 is inside to be equipped with dust removal flow straightener 100 in advance, be equipped with waveform dust collection mechanism 2 in advance on the dust removal flow straightener 100 in advance, waveform dust collection mechanism 2 includes the wave form piece 200 that a plurality of groups arranged along electric field width direction interval, has airflow channel between the adjacent wave form piece 200, and each wave form piece includes V type net piece 21 to and set up in the air current that V type net piece 21 rear end outwards buckled and extend and disperse net piece 22, cathode system 4 is provided with at least one netted auxiliary electrode assembly 43 respectively at the front end and the tail end of each electric field.

Further, refer to fig. 2 to 4, wave form piece 200 of wave form dust arrester installation 2 in advance is including setting up respectively in a plurality of left side wave form piece 201, right side wave form piece 202 on entrance point 10 width direction left side, right side, the air current of left side wave form piece 201 rear end is dispersed net piece 22 and is set up towards a left side, makes the air current through airflow channel disperse net piece 22 and is set up towards the right side, makes the air current through airflow channel disperse towards the right side to reach the air current and disperse to both sides, it is even at the inside air current of electrostatic precipitator, in this embodiment, air current is dispersed net piece 22 and is the zigzag structure. The V-shaped mesh sheet 21 and the airflow diffusing mesh sheet 22 are all prismatic mesh sheets with the aperture ratio of 45% -50%. The V-shaped net sheet 21 is deposited on the V-shaped net sheet under the action of gravity by utilizing the action of inertia force of large particles under the action of air flow, so that dust and heavy flue gas are separated, and the effect of pre-dedusting is achieved.

Furthermore, a rapping dust-cleaning device is arranged on the waveform pre-dust-collecting mechanism 2, and mechanical rapping or electromagnetic rapping is adopted.

Further, referring to fig. 2, the pre-dedusting flow equalizing device 100 includes a first guide plate 1, a waveform pre-dust collecting mechanism 2, and a second guide plate 3, which are sequentially arranged along a flue gas treatment direction, where the first guide plate 1 and the second guide plate 3 are both flat plates with a plurality of openings.

Further, referring to fig. 6, the cathode assembly 43 of the mesh-type auxiliary electrode includes a middle frame 431, a metal mesh 432 mounted on the middle frame 431, and auxiliary barbed wires 433 mounted on both sides of the middle frame 431. The middle framework 431, the metal net 432 and the auxiliary prickle wire 433 are all integrally formed by pressing.

Further, referring to fig. 5, the cathode system 4 further includes a cathode frame 41 and a plurality of groups of barbed wires 42 installed on the cathode frame 41, wherein the cathode frame 41 is respectively provided with 1-2 mesh auxiliary electrode cathode assemblies 43 at the front end and the tail end of the electric field, and the middle of the electric field is provided with the plurality of groups of barbed wires 42.

Further, the inner surface of the ash hopper 40 and/or the inner surface of the lower ash discharge surface of the inlet end 10 are/is provided with a coating, and the coating is an organic silicon compound and has the characteristics of low surface tension, small viscosity-temperature coefficient, high and low temperature resistance, electrical insulation, oxidation resistance stability, flame retardancy, hydrophobicity, corrosion resistance, no toxicity, no odor and the like. Is not easy to stick ash, and can ensure smooth ash discharge under the condition of the ash temperature of 80-120 ℃. The ash bucket coating adopts the modes of electrostatic spraying and high-temperature melting and drying to ensure the smoothness of the surface. The anti-corrosion performance of the coating improves the service life of the ash bucket, the electric insulation of the coating prevents the charged dust charges falling to the ash bucket from being guided into the ground by the ash bucket, so that the dust in the ash bucket still keeps a certain electric quantity, the dust respectively carries negative electricity and the like poles repel each other, and the ash bucket keeps a certain looseness under the action of the charge repulsion, so that the compactness of the ash is reduced, the flowability is increased, and the ash unloading performance is better.

Further, referring to fig. 1, the inlet end 10 adopts a multi-stage structure, and includes a first-stage slope section 11 and a second-stage slope section 12 which are sequentially arranged along the flue gas treatment direction, the ash discharge angle between the lower ash discharge surface of the first-stage slope section 11 and the horizontal plane is 36 to 42 °, because the flue gas flow velocity at this stage is high, the ash discharge can be ensured under the air flow flushing, the ash discharge angle between the lower ash discharge surface of the second-stage slope section 12 and the horizontal plane is 45 to 48 °, the flue gas flow velocity at this stage is low, and more ash appears under the action of the waveform pre-dust collection mechanism 2 and needs to be discharged, so that the stage needs a sufficient ash discharge angle. In this embodiment, the inlet end 10 further includes a lower horizontal section 13 disposed at the inlet end, the lower side surface of the lower horizontal section 13 is a horizontal surface, the horizontal section is disposed under the condition that the length of the inlet end 10 along the flue gas direction is shorter, so that the ash discharging angles of the first-stage slope section 11 and the second-stage slope section 12 can be ensured, and the lower horizontal section 13 is not disposed when the length of the inlet end 10 along the flue gas direction is sufficiently long. The inlet end 10 adopts a three-section type horn, and the ash discharging performance under different air flow speeds is fully used, so that the whole size of the inlet end is reduced, the occupied space is reduced, the weight is reduced, the flow guide effect is improved, and the cost is reduced.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims

1. The utility model provides an ultralow emission electrostatic precipitator, includes entrance point (10), a plurality of dust removal electric field (20), exit end (30) that set gradually along the flue gas treatment direction, sets up negative pole system (4) and the positive pole system in each dust removal electric field (20) to and set up in ash bucket (40) of each dust removal electric field (20) bottom, its characterized in that: entrance point (10) inside dust removal flow straightener (100) in advance that is equipped with, it gathers dust mechanism (2) in advance to be equipped with the wave form on flow straightener (100) in advance, wave form gathers dust mechanism (2) in advance and includes wave form piece (200) that a plurality of groups arranged along electric field width direction interval, has airflow channel between adjacent wave form piece (200), and each wave form piece includes V type net piece (21) to and set up in the air current that V type net piece (21) rear end outside bending type extends and disperse net piece (22), cathode system (4) are provided with at least one netted auxiliary electrode negative pole subassembly (43) respectively at the front end and the tail end of each electric field.

2. The ultra-low emission electric precipitator of claim 1, wherein: wave form piece (200) of wave form pre-dust-collection mechanism (2) including set up respectively in a plurality of left side wave form piece (201), right side wave form piece (202) on entrance point (10) width direction left side, right side, the air current of left side wave form piece (201) rear end is dispersed net piece (22) and is set up towards a left side, makes the air current through airflow channel disperse towards a left side, the air current of right side wave form piece (202) rear end is dispersed net piece (22) and is set up towards a right side, makes the air current through airflow channel disperse towards a right side.

3. The ultra-low emission electric precipitator of claim 1, wherein: the V-shaped mesh (21) and the airflow dispersion mesh (22) are both prismatic mesh plates with the aperture ratio of 45% -50%.

4. The ultra-low emission electric precipitator of claim 1, wherein: and a rapping dust cleaning device is arranged on the waveform pre-dust collection mechanism (2).

5. An ultra-low emission electric precipitator according to any of claims 1 to 4, wherein: dust removal flow straightener (100) in advance includes first guide plate (1), wave form dust collection mechanism (2), second guide plate (3) in advance that set gradually along the flue gas treatment direction, first guide plate (1), second guide plate (3) are the flat board that has a plurality of trompils.

6. The ultra-low emission electric precipitator of claim 1, wherein: the mesh-shaped auxiliary electrode cathode assembly (43) comprises a middle framework (431), a metal mesh (432) arranged on the middle framework (431), and auxiliary barbed wires (433) arranged on two sides of the middle framework (431).

7. An ultra-low emission electrostatic precipitator as claimed in claim 1 or 6, wherein: the cathode system (4) further comprises a cathode frame (41) and a plurality of groups of barbed wires (42) arranged on the cathode frame (41), wherein 1-2 mesh auxiliary electrode cathode assemblies (43) are respectively arranged at the front end and the tail end of the cathode frame (41) of the electric field, and the plurality of groups of barbed wires (42) are arranged in the middle of the electric field.

8. The ultra-low emission electric precipitator of claim 1, wherein: the inner surface of the ash bucket (40) and/or the inner surface of the ash discharging surface at the lower side of the inlet end (10) are/is provided with coatings, and the coatings adopt organic silicon compounds.

9. The ultra-low emission electric precipitator of claim 1, wherein: the inlet end (10) adopts a multi-section structure and comprises a first-stage slope section (11) and a second-stage slope section (12) which are sequentially arranged along the flue gas treatment direction, wherein the ash discharging angle between the lower side ash discharging surface of the first-stage slope section (11) and the horizontal plane is 36-42 degrees, and the ash discharging angle between the lower side ash discharging surface of the second-stage slope section (12) and the horizontal plane is 45-48 degrees.

10. An ultra-low emission electric precipitator as defined in claim 9, wherein: the inlet end (10) further comprises a lower horizontal section (13) arranged at the inlet end, and the lower side surface of the lower horizontal section (13) is a horizontal plane.