CN204502682U - Electro static filtering deduster - Google Patents

Abstract

The utility model discloses an electrostatic filter dust remover, which comprises a casing, an air inlet is arranged on the front side of the casing, an air outlet is arranged on the rear side, one or more electric fields are arranged inside the casing, an ash hopper is arranged at the bottom of the electric field, and an ash bucket is arranged inside the electric field. The discharge electrode and the dust collecting plate are equipped with an electrostatic soot filter at the gas outlet of the electric field. The electrostatic soot filter includes a support frame covered with a conductive filter. The front side of the conductive filter has a filter air inlet. Towards the gas outlet of the electric field; the conductive filter includes a left side and a right side, a rear side is connected between the left side and the rear end of the right side, and a rear side is connected between the left side and the front end of the right side The opening forms the filter air inlet, and the distance between the left side and the right side decreases gradually from the front end to the rear end. The electrostatic dust filter, the dust collecting plate of the electric field and the discharge electrode are trinity to realize the efficient separation of dust and airflow, which can effectively capture the dust not collected by the dust collecting plate and the fine dust whose particle size is less than pm2.5, greatly improving the dust removal efficiency .

Description

Electrostatic filter dust collector

technical field

The utility model relates to dust removal equipment, in particular to an electrostatic filter dust remover.

Background technique

Electrostatic precipitator is a widely used dust removal equipment, which is equipped with discharge electrodes and dust collection electrodes. The working principle of the electrostatic precipitator is: when the flue gas enters the electrostatic precipitator, under the action of the high-voltage electric field, the discharge electrode releases a large number of negative electrons, which will quickly attach to the dust surface in the flue gas, making the negatively charged dust quickly flow toward the dust collector. The electrodes approach and are adsorbed on the surface of the dust collection electrodes, thereby separating the dust from the flue gas flow.

The existing electrostatic precipitators have the following disadvantages: 1) The existing electrostatic precipitators are difficult to capture fine dust less than pm2.5, and the concentration of smoke and dust emissions is difficult to meet the national emission standards, and it is even more difficult to meet the current gradually increasing environmental protection requirements; 2) Due to the insufficient charge of some dust, it is difficult to quickly approach the dust collection plate, and some dust with high specific resistance cannot release negative charges quickly after being absorbed by the anode dust collection plate, so that the surface of the dust collection plate still has a negative charge The dust repulses the negatively charged dust approaching the dust collecting plate, which causes some dust to be unable to be effectively absorbed by the dust collecting plate and free in the electric field space, and then escapes from the electric field along the surface of the dust collecting plate with the air flow, resulting in electrostatic precipitator The dust removal efficiency is low. In order to improve the dust removal efficiency, the existing electrostatic precipitator usually adopts multiple electric fields in series to improve the dust removal efficiency, which also causes the problems of bulky electrostatic precipitator, equipment occupation area and excessive investment.

Contents of the invention

The purpose of the utility model is to provide an electrostatic filter dust remover, which greatly improves the dust removal efficiency.

In order to achieve the above purpose, the technical solution adopted by the utility model is: an electrostatic filter dust collector, including a housing, the front side of the housing is provided with an air inlet, the rear side is provided with an air outlet, and the housing is provided with a or a plurality of electric fields, the bottom of the electric field is provided with an ash hopper, the electric field is provided with a discharge electrode and a dust collecting plate, the gas outlet end of the electric field is provided with an electrostatic soot filter, and the electrostatic soot filter includes a supporting frame, The support frame is covered with a conductive filter, and the front side of the conductive filter is provided with a filter air inlet, and the filter air inlet faces the gas outlet of the electric field; the conductive filter includes a left side and a right side. side, the rear side is connected between the rear ends of the left side and the right side, and the opening between the front ends of the left side and the right side forms the filter air inlet, the The distance between the left side and the right side decreases gradually from the front end to the rear end.

The utility model adds an electrostatic soot filter to each electric field of the electrostatic precipitator or some electric field outlets, and the electrostatic soot filter is integrated with the dust collecting plate and the discharge electrode of the electric field to realize efficient separation of dust and air flow together. , where the discharge electrode is the negative pole, the electrostatic dust filter and the dust collection plate are both positive poles, and are well grounded with the shell, the strong electric field near the discharge electrode pushes the negatively charged dust into the dust collection plate and the dust filter, and the dust The separated clean airflow still keeps flowing near the discharge electrodes, and flows out of the electric field from the gap channel between the soot filters, while the charged dust dissociated in the electric field space is driven into the electrostatic soot filter by the force of the electric field. The negatively charged dust in the filter and the forward speed of the airflow slow down, and it is easier to be captured by the electrostatic dust filter, and the negatively charged dust dissociated in the electrostatic dust filter will be absorbed and intercepted by the positively charged conductive filter, and The dust layer adsorbed on the surface of the conductive filter can enhance the effect of intercepting and filtering dust. Due to the multiple functions of electrostatic adsorption and intercepting and filtering dust, it can effectively capture the dust that is not captured by the dust collecting plate and the particle size is less than pm2.5 Therefore, the dust removal efficiency is greatly improved, so that the dust discharge of the electrostatic filter dust collector can well meet the gradually increasing national environmental protection requirements; moreover, the conductive filter adopts a structure with a large front and a small rear, which guides the airflow , so that more dusty gas enters the conductive filter in time for adsorption and filtration, further improving the dust removal efficiency of the dust collector; in addition, this electrostatic filter dust remover eliminates the need for the resistance greater than 50pa in the outlet horn of the conventional electrostatic precipitator. The double-layer airflow baffle is beneficial to improve the dust removal efficiency, improve the local air permeability and significantly reduce the resistance; this electrostatic filter dust collector can reduce the number of series electric fields of the dust collector, greatly reduce the volume of the dust collector, and has the advantages of low investment and small footprint. The advantages of long service life and low operation and maintenance costs have broad application prospects.

Further, an anode support plate is arranged inside the conductive filter, and the anode support plate is perpendicular to the rear side and arranged equidistantly from the left side and the right side. When the electrostatic soot filter, the dust collecting plate of the electric field and the discharge electrode are trinity to separate the dust and the airflow, the strong electric field near the discharge electrode pushes the negatively charged dust to the anode support plate between the dust collecting plate and the soot filter, and the dust is separated The clean airflow still keeps flowing near the discharge electrodes, and flows out of the electric field from the gap channel between the soot filters, while the charged dust dissociated in the electric field space is driven into the electrostatic soot filter by the force of the electric field. The negatively charged dust and the airflow slow down, and most of them are captured by the anode support plate in the middle of the electrostatic dust filter. Therefore, the anode support plate increases the dust collection area and improves the electrostatic adsorption dust collection of the electrostatic dust filter. In addition, the anode support plate also supports and reinforces the conductive filter, improving the strength and operation stability of the electrostatic dust filter.

Further, the anode support plate is fixedly connected with the support frame, and the anode support plate is arranged on the same straight line or parallel line of the dust collecting plate.

Further, the gas outlet end of the electric field is provided with a plurality of electrostatic soot filters, and the plurality of electrostatic soot filters are arranged side by side in a row, and there is a gap between adjacent electrostatic soot filters, and the The filter air inlet of the electrostatic dust filter faces the air outlet of the electric field.

Further, the air outlet of the electric field is provided with a plurality of electrostatic soot filters, and the plurality of electrostatic soot filters are arranged side by side in multiple rows, with gaps between front and rear adjacent rows and staggered arrangements. Adjacent rows of electrostatic dust filters are arranged in dislocation, which is beneficial to the uniform distribution of airflow and the improvement of filtration efficiency; because of the uniform distribution of airflow, the double-layer airflow uniform distribution with large resistance in front of the outlet horn of conventional electrostatic precipitators can be omitted. The baffle, while improving the dust removal efficiency, greatly reduces the resistance of the electrostatic filter dust collector.

Further, the electric field is provided with a plurality of the dust collecting plates arranged in parallel, and the discharge electrodes are arranged between the adjacent dust collecting plates; The tuyeres are respectively facing the gas outlet of the electric field, the anode support plates of the electrostatic dust filter are respectively close to and installed on the same vertical plane of the dust collecting plates of each row, and the remaining any row of the electrostatic dust filter The filter air inlets respectively face the gap channels between the adjacent electrostatic soot filters in the preceding row of electrostatic soot filters.

Further, a vibrating dust cleaning device is connected to the electrostatic dust filter.

Further, the conductive filter screen extends longitudinally from the upper part to the lower part of the dust collecting plate.

Further, a load-bearing suspender is provided on the top of the supporting frame, and the load-bearing suspender is hung on the top of the housing.

Furthermore, the conductive filter net is made of alloy fiber. The alloy fiber has good electrical conductivity, wear resistance, corrosion resistance and temperature resistance.

Description of drawings

Fig. 1 is a front structural schematic diagram of an electrostatic filter dust collector.

Fig. 2 is a top structural schematic diagram of the electrostatic filter dust collector in Fig. 1 .

Fig. 3 is a schematic cross-sectional structure diagram of the electrostatic soot filter in Fig. 1 .

Fig. 4 is an enlarged structural schematic diagram of the rapping and dust-cleaning device in Fig. 1 .

Fig. 5 is a schematic diagram of the working state of the electrostatic filter dust collector in Fig. 1 .

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings to facilitate a clearer understanding of the utility model, but they do not limit the utility model.

As shown in Fig. 1 and Fig. 2, an electrostatic filter dust collector includes a housing 1, an air inlet 1-1 is provided on the front side of the housing 1, an air inlet horn 7 is arranged on the air inlet 1-1, and the rear The air outlet 1-2 is provided on the side, and the air outlet 1-2 is provided with an air outlet horn 8. Two electric fields 2 are connected in series in the housing 1, and a cone-shaped ash hopper 3 is respectively provided at the bottom of the two electric fields 2, each The electric field 2 is provided with a plurality of dust collection plates 2-2 arranged in parallel with each other, and the discharge electrodes 2-1 are provided between adjacent dust collection plates 2-2, and a plurality of electrostatic dust filters 4 are provided at the gas outlet of each electric field 2 , the electrostatic dust filter 4 includes a support frame 4-1, the support frame 4-1 is coated with a conductive filter screen 4-2, and the longitudinal span of the conductive filter screen 4-2 is from the dust collection plate 2-2 The upper part extends to the lower part of the dust collecting plate 2-2, the conductive filter screen 4-2 is provided with an anode support plate 4-3, and the front side of the conductive filter screen 4-2 is provided with a filter air inlet 4-4, The filter air inlet 4-4 faces the air outlet of the electric field 2; the top of each supporting frame 4-1 is provided with a load-bearing suspender 6, and the load-bearing suspender 6 is hung on the top of the housing 1; each electric field 2 is air-out A plurality of electrostatic soot filters 4 at the end are arranged side by side in two rows. There is a gap between the electrostatic soot filters 4 in the rear row and the electrostatic soot filters 4 in the front row. The filter air inlets 4-4 of the filter air inlets 4-4 are respectively facing the air outlet of the electric field 2, and the filter air inlets 4-4 of the electrostatic dust filters 4 in the rear row are respectively facing the gap between the adjacent electrostatic smoke filters 4 in the front row electrostatic dust filters 4. In the gap channel, multiple rows of electrostatic dust filters 4 are arranged and arranged in a dislocation, which is conducive to improving the filtering and intercepting effect of dust. One row or more than two rows of electrostatic dust filters 4 can also be arranged at the gas outlet of each electric field 2 as required, and the above-mentioned dislocation arrangement method is also adopted when there are more than two rows.

In the above solution, as shown in FIG. 3, the conductive filter 4-2 includes a left side 4-21 and a right side 4-22, and the left side 4-21 and the right side 4-22 There is a rear side 4-23 connected between the rear ends, and the opening between the left side 4-21 and the front end of the right side 4-22 forms the filter air inlet 4-4, and the left side The distance between the surface 4-21 and the right side 4-22 decreases from the front end to the rear end; the anode support plate 4-3 is arranged perpendicular to the rear side 4-23 on the conductive filter screen 4-2 On the axis of symmetry, that is: the distance from the anode support plate 4-3 to the left side 4-21 and the right side 4-22 is equal, and the front and rear ends of the anode support plate 4-3 are respectively fixed on the support On the skeleton 4-1, and the anode support plates 4-3 of each electrostatic dust filter 4 are respectively arranged on the same straight line of the dust collection plate 2-2 or on the parallel line of the dust collection plate 2-2; the conductive filter screen 4- 2. Use metal filter material that can filter dust, preferably alloy fiber material with high temperature resistance, wear resistance, corrosion resistance and good conductivity. Its air permeability and external dimensions can be adjusted according to the requirements of dust removal efficiency and airflow resistance.

In the above scheme, as shown in Fig. 4, the electrostatic soot filter 4 is connected with a rapping soot cleaning device 5, and the rapping soot cleaning device 5 includes a rapping rotating shaft 5-1 and a rapping anvil 5-2. The rapping rotating shaft 5-1 is fixedly connected with a rapping arm 5-3, the rapping hammer 5-4 is hinged on the rapping arm 5-3, and the rapping anvil 5-2 bears the rapping hammer 5-4, and the rapping anvil 5-2 is fixedly connected with the support frame 4-1 through a connecting rod, and the rapping anvil 5-2 can also be connected with the dust collecting plate 2-2 through a connecting rod at the same time , to realize the simultaneous vibrating and dust removal of the electrostatic dust filter 4 and the dust collecting plate 2-2.

The working process of the above-mentioned electrostatic filter dust collector is as follows: As shown in Figure 5, after the dusty flue gas 9 enters the electric field 2, the strong electric field near the discharge electrode 2-1 pushes the negatively charged dust to the dust collecting plate 2-2 and the static electricity. The anode support plate 4-3 of the soot filter 4, the clean air flow 10 separated from the dust still keeps flowing through the vicinity of the discharge electrode 2-1, and flows out of the electric field 2 from the passage between the soot filter 4, and is free in the electric field space The charged dust is driven into the electrostatic soot filter 4 by the electric field force, and most of the negatively charged dust entering the electrostatic soot filter 4 and the forward speed of the airflow are slowed down, and most of them are more easily absorbed by the anode support plate 4 of the electrostatic soot filter 4 -3 capture, the negatively charged dust that is still free in the electrostatic dust filter 4 will be adsorbed and intercepted by the positive conductive filter screen 4-2, and the dust layer adsorbed on the surface of the conductive filter screen 4-2 can enhance interception The function of filtering dust, due to the electrostatic adsorption and multiple interception and filtering functions of the electrostatic dust filter 4, the dust not collected by the dust collecting plate 2-2 and some fine dust less than pm2. The airflow flowing out of the filter screen 4-2 is the ultra-clean gas 11 that is almost free of dust, thereby greatly improving the dust removal efficiency.

Claims (9)

1. An electrostatic filter dust collector, comprising a housing (1), the front side of the housing (1) is provided with an air inlet (1-1), and the rear side is provided with an air outlet (1-2), and the housing (1) is provided with an air outlet (1-2). The body (1) is provided with one or more electric fields (2), the bottom of the electric field (2) is provided with an ash hopper (3), and the electric field (2) is provided with a discharge electrode (2-1) and dust collecting The plate (2-2), is characterized in that: the air outlet end of the electric field (2) is provided with an electrostatic soot filter (4), and the electrostatic soot filter (4) includes a supporting frame (4-1), the The support frame (4-1) is coated with a conductive filter screen (4-2), and the front side of the conductive filter screen (4-2) is provided with a filter air inlet (4-4), and the filter air inlet ( 4-4) toward the gas outlet of the electric field (2); the conductive filter screen (4-2) includes a left side (4-21) and a right side (4-22), and the left side ( 4-21) and the rear end of the right side (4-22) are connected with a rear side (4-23), and the left side (4-21) and the right side (4-22 ) opening between the front ends forms the filter air inlet (4-4), and the spacing between the left side (4-21) and the right side (4-22) decreases from the front end to the rear end . 2. The electrostatic filter dust collector according to claim 1, characterized in that: the conductive filter screen (4-2) is provided with an anode support plate (4-3), and the anode support plate (4-3) It is perpendicular to the rear side (4-23) and arranged equidistantly from the left side (4-21) and the right side (4-22). 3. The electrostatic filter dust collector according to claim 2, characterized in that: the anode support plate (4-3) is fixedly connected to the support frame (4-1), and the anode support plate (4- 3) Arranged on the same straight line or parallel line of the rows of dust collecting plates (2-2). 4. The electrostatic filter dust collector according to claim 1, characterized in that: the gas outlet of the electric field (2) is provided with a plurality of electrostatic soot filters (4), and the plurality of electrostatic soot filters ( 4) Left and right side by side in a row, there is a gap between the adjacent electrostatic soot filters (4), and the filter air inlet (4-4) of the electrostatic soot filter (4) faces the electric field ( 2) The gas outlet. 5. The electrostatic filter dust remover according to claim 1, characterized in that: the outlet end of the electric field (2) is provided with a plurality of electrostatic soot filters (4), and the plurality of electrostatic soot filters ( 4) They are arranged side by side in multiple rows, and there is a space between the front and back adjacent rows and the arrangement is misplaced. 6. The electrostatic filter dust collector according to claim 1, 4 or 5, characterized in that: the electrostatic soot filter (4) is connected with a vibrating dust removal device (5). 7. The electrostatic filter dust collector according to claim 1 or 2, characterized in that: the conductive filter (4-2) extends longitudinally from the upper part to the lower part of the dust collecting plate (2-2). 8. The electrostatic filter dust collector according to claim 1 or 3, characterized in that: the top of the supporting frame (4-1) is provided with a load-bearing suspender (6), and the load-bearing suspender (6) hangs on top of the housing (1). 9. The electrostatic filter dust collector according to claim 1 or 2, characterized in that: the conductive filter (4-2) is made of conductive alloy.