CN105195324A - Efficient wet type electric precipitator - Google Patents

Abstract

The invention discloses an efficient wet type electric precipitator, belongs to the technical field of environmental protection equipment and solves the technical problems that the continuous water consumption of a precipitator is high, a water quality regulating facility is required to be added, the corrosion resistance of an anode tube material is poor and the like in the prior art. The efficient wet type electric precipitator comprises a dust chamber, wherein an exhaust gas outlet is formed in the top of the dust chamber; an exhaust gas inlet and a drain pipe are arranged on the lower side wall of the dust chamber; an anode tube bundle and cathode wires are arranged in the dust chamber; the anode tube bundle is formed by hollow anode tubes side by side, an axis of each anode tube extends in the vertical direction, and the cathode wires penetrate through the anode tubes and coincide with the axes of the anode tubes; a washing system is arranged above the anode tube bundle.

Description

Efficient wet electrostatic precipitator

technical field

The invention belongs to the technical field of environmental protection equipment, and in particular relates to a high-efficiency wet electrostatic precipitator.

Background technique

At present, there are technical problems such as large continuous water consumption, need to install water quality adjustment facilities, poor corrosion resistance of anode plate materials, and low dust removal efficiency for the same flue gas runoff area. At the same time, domestic tubular wet electrostatic precipitators also have There are technical problems such as large continuous water consumption, the need to install water quality adjustment facilities, and poor corrosion resistance of anode tube materials. How to reduce water consumption, improve the corrosion resistance of anode tube materials, reduce energy consumption, and achieve near-zero emissions has become an urgent technical issue to be solved.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-efficiency wet electrostatic precipitator, which can effectively reduce water consumption, reduce energy consumption, and realize near-zero emission.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: a high-efficiency wet electrostatic precipitator, including a dust removal chamber, the top of the dust removal chamber is provided with a flue gas outlet, and the lower side wall of the dust removal chamber is provided with a flue gas inlet and a drain pipe, The dust removal chamber is provided with anode tube bundles and cathode wires, the anode tube bundles are formed by hollow anode tubes side by side, the axis of the anode tubes extends vertically, the cathode wires pass through the inside of the anode tubes, and the The cathode line coincides with the axis of the anode tube, and a flushing system is arranged above the anode tube bundle.

In the dust collector of the present invention, the saturated wet flue gas of the desulfurization system enters from the flue gas inlet, passes upward through the anode tube bundle and is discharged through the flue gas outlet. The dust collector uses the water in the flue gas to form a uniform conductive water film on the inner wall of the anode tube, When the cathode line discharges, the aerosols, liquid droplets, dust, etc. in the flue gas are corona charged, move to the anode tube at different speeds and adsorb on the inner wall of the anode tube. The inner wall of the anode tube slides downward and is discharged through the drain pipe at the lower part of the dust removal chamber. In this way, the flue gas discharged from the flue gas outlet is the clean flue gas after removing impurities such as aerosols, liquid droplets, and dust. Among them, the aerosol is mostly in the form of ions, and the particle size of the dust can be <1 μm. The dust collector does not require continuous flushing, and the water consumption is low; the flushing water of the flushing system does not require water quality adjustment, less auxiliary equipment, and low energy consumption; the dust removal efficiency is high, and it can achieve near-zero emissions.

Preferably, the dust removal chamber is installed with a cathode positioning frame and a cathode positioning frame from top to bottom, the upper end of the cathode line is installed on the cathode positioning frame, and the lower end of the cathode line is connected with the cathode positioning frame. The cathode line is positioned by the cathode positioning frame and the cathode limit positioning frame to ensure that the axis of the cathode line coincides with the axis of the anode tube.

Preferably, a limit ring is installed on the cathode limit frame, a ceramic weight is suspended from the lower end of the cathode wire, and the ceramic weight is connected to the limit ring. By setting the ceramic weight at the lower end of the cathode wire to connect with the limit ring, the precise positioning of the cathode wire and the uniform strength of the power plant are ensured.

Preferably, between the cathode positioning frame and the inner wall of the dust removal chamber, and between the cathode positioning frame and the inner wall of the dust removal chamber are connected through an insulating support device, and the dust removal chamber is connected to a power access system, and the insulating support device A hot air device is connected to the power access system. The hot air device can maintain a positive pressure inside the insulation support device and the power supply access system pipeline, which is always higher than the dew point temperature, effectively ensuring insulation and safety.

Preferably, both sides of the anode tube bundle are connected to the inner wall of the dedusting chamber through a grounding device. The anode tube bundle leads out the enriched electrons through the grounding device and the safety lead-out device of the grounding wire passing through the shell of the dust collector, effectively ensuring insulation and safety.

Preferably, a deflector is provided below the anode tube bundle, and the level of the deflector is higher than that of the drain pipe.

Preferably, an inspection manhole is also provided on the lower side wall of the dust removal chamber. It is convenient for maintenance personnel to enter the interior of the equipment through the maintenance manhole for inspection and maintenance when the equipment is out of operation.

Preferably, the outer diameter of the anode tube is 250-400mm, the length is 4-8m, and the surface of the inner wall is roughened. After the surface of the inner wall is roughened, the water film on the inner wall can be made uniform, and the strength of the power plant can be uniform.

Preferably, the material of the anode tube is flame-retardant polypropylene. The anode tube material has strong corrosion resistance, low maintenance rate and long service life.

Preferably, the material of the cathode wire is Hastelloy. Hastelloy has strong corrosion resistance and strong mechanical properties, which avoids the problems of cathodic wire falling off, breaking and corrosion, and greatly prolongs the service life of the dust collector.

The high-efficiency wet electrostatic precipitator of the present invention has long service life and low maintenance rate; the intermittent flushing water does not need to be tempered, and the energy consumption is low; the same dust collecting area is smaller than the plate type wet electrostatic precipitator, and the installation is quick; no continuous flushing is required The water forms a water film, and the voltage and current are monitored by the control system, and the water is washed intermittently. And modular production, fast installation speed, high installation accuracy, high dust removal efficiency, when the inlet dust concentration is 20-200㎎/nm ³ , when the reference oxygen content is 6%, the dust removal efficiency can reach 80-99%, which is the best way to achieve near-zero flue gas key equipment for emissions.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is the structural representation of embodiment 1 of efficient wet electrostatic precipitator of the present invention;

Fig. 2 is a schematic diagram of the connection relationship between the cathode wire and the cathode limit frame in the present invention.

Detailed ways

As shown in Figures 1 and 2, it is a preferred embodiment 1 of the high-efficiency wet electrostatic precipitator of the present invention, including a dust removal chamber, the top of the dust removal chamber is provided with a flue gas outlet 1, and the lower side wall of the dust removal chamber is provided with a flue gas inlet 6 and drain pipe 7, the anode tube bundle 4 and cathode wire 3 are arranged in the dedusting chamber, the anode tube bundle 4 is formed by hollow anode tubes 41 side by side, the axis of the anode tube 41 extends along the vertical direction, the The cathode line 3 passes through the inside of the anode tube 41, and the axis of the cathode line 3 coincides with the axis of the anode tube 41. The upper end of the cathode line 3 is connected to a high voltage and insulation device 2, and a flushing system 8 is provided above the anode tube bundle 4. A deflector 5 is arranged below the anode tube bundle 4 , and the level of the deflector 5 is higher than that of the drain pipe 7 . An inspection manhole 12 is also provided on the lower side wall of the dust removal chamber. It is convenient for maintenance personnel to enter the interior of the equipment through the maintenance manhole 12 for inspection and maintenance when the equipment is out of service.

A cathode positioning frame 9 and a cathode positioning frame 10 are installed in the dedusting chamber from top to bottom. The cathode wire 3 is positioned by the cathode positioning frame 9 and the cathode positioning frame 10 to ensure that the axis of the cathode wire 3 coincides with the axis of the anode tube 41 .

A limit ring 101 is installed on the cathode limit frame 10 , a ceramic weight 31 is suspended from the lower end of the cathode wire 3 , and the ceramic weight 31 is connected to the limit ring 101 . The ceramic weight 31 is cylindrical. By setting the ceramic weight 31 at the lower end of the cathode wire 3, the limit ring 101 on the cathode limit frame 10 is set on the outside of the ceramic weight 31. Specifically, the cathode wire 3 is positioned with the upper cathode. The frame 9 is bolted, the cathode wire 3 is suspended and vertically passes through the center of each anode tube 41 in the anode tube bundle 4, the cathode positioning frame 9 is installed in the dust removal room through the insulating support device 11, and the lower end of the cathode wire 3 is hung with a ceramic weight 31. The limit ring 101 on the cathode limit frame 10 is used to fix the ceramic weight 31 to ensure the precise positioning of the cathode wire 3, so that the anode tube 41 and the cathode wire 3 are always accurately centered from top to bottom, and the cathode limit The bit frame 10 is also installed in the dust removal chamber through an insulating support device 11 .

The cathode positioning frame 9 is connected to the inner wall of the dust removal chamber, and the cathode positioning frame 10 is connected to the inner wall of the dust removal chamber through an insulating support device 11. The dust removal chamber is connected to a power supply access system, and the insulating support device 11 and the power access system are connected with a hot air device, and both sides of the anode tube bundle 4 are connected to the inner wall of the dust removal chamber through the grounding device 2 . The hot air device can maintain positive pressure inside the insulating support device 11 and the power supply access system pipeline, and the anode tube bundle 4 can lead out the enriched electrons through the grounding device 2 and the safety lead-out device of the grounding wire passing through the shell of the dust collector, and it is always higher than the dew point temperature, are effectively guaranteed insulation, safety.

The outer diameter of the anode tube 41 is 250-400mm, the length is 4-8m, and the surface of the inner wall is roughened. After the surface of the inner wall of the anode tube 41 is roughened, the water film on the inner wall can be uniform, and the strength of the power plant can be uniform. The material of the anode tube 41 is flame retardant polypropylene. The anode tube material has strong corrosion resistance, low maintenance rate and long service life. The material of the cathode wire 3 is Hastelloy. Hastelloy has strong corrosion resistance and strong mechanical properties, which avoids the problems of cathodic wire falling off, breaking and corrosion, and greatly prolongs the service life of the dust collector.

During operation, the saturated wet flue gas passing through the desulfurization system enters the dust removal chamber through the flue gas inlet 6, and after passing through the deflector 5, enters the anode tube bundle 4, forming a uniform conductive water film on the inner wall of the anode tube bundle 4. When the flue gas passes through the inside of the anode tube bundle 4, the high-voltage and insulating device 2 controls the discharge of the cathode wire 3, so that the main components of the flue gas pollutants such as aerosol, liquid droplets, and dust in the flue gas are corona charged, and the anode tube 41 conducts the water film. Move and adsorb on the surface of the water film, and finally slide down by gravity, enter the bottom of the dust removal chamber, and discharge into the desulfurization absorption tower (when the tower top is arranged) or enter the desulfurization absorption tower slurry pool (when the tower side is arranged) ), the final ultra-clean flue gas enters the chimney from flue gas outlet 1 and is discharged to the atmosphere. According to the voltage and current monitoring system, the flushing system 8 is controlled intermittently and partitioned for flushing. In addition, the flue gas can also be dust-removed in the way of top-up and bottom-out.

After testing, the high-efficiency wet electrostatic precipitator of this embodiment has an applicable temperature between 50-80°C, a body resistance between 250-300Pa, a flue gas flow rate as high as 3-4.5m/s, and an operating voltage of 40kV-80kV. , Rinse once every 48-72 hours on average.

The above is only a specific embodiment of the present invention, but the technical characteristics of the present invention are not limited thereto, any changes or modifications made by those skilled in the art within the field of the present invention are covered by the patent scope of the present invention among.

Claims (10)

1. high-efficient wet-type electric cleaner, comprise dirt pocket, described dirt pocket top is provided with exhanst gas outlet (1), described dirt pocket lower sides is provided with gas approach (6) and drainpipe (7), it is characterized in that: in described dirt pocket, be provided with anode tube bank (4) and cathode line (3), described anode tube bank (4) is formed side by side by the anode tube (41) of hollow, the axis of described anode tube (41) vertically extends, described cathode line (3) is inner through anode tube (41), and the dead in line of described cathode line (3) and anode tube (41), described anode tube bank (4) top is provided with rinse-system (8).

2. high-efficient wet-type electric cleaner according to claim 1, it is characterized in that: negative electrode positioning framework (9) and the spacing framework of negative electrode (10) are from top to bottom installed in described dirt pocket, described cathode line (3) upper end is arranged on negative electrode positioning framework (9), and described cathode line (3) lower end is connected with the spacing framework of negative electrode (10).

3. high-efficient wet-type electric cleaner according to claim 2, it is characterized in that: the spacing framework of described negative electrode (10) is provided with spacing ring (101), described cathode line (3) lower end is hung with ceramic weight (31), and described ceramic weight (31) is connected with spacing ring (101).

4. high-efficient wet-type electric cleaner according to claim 2, it is characterized in that: described negative electrode positioning framework (9) with between dirt pocket inwall, the spacing framework of described negative electrode (10) is all connected by insulation support device (11) with between dirt pocket inwall, described dirt pocket is connected with plant-grid connection system, and described insulation support device (11) and plant-grid connection system are all connected with hot air apparatus.

5. high-efficient wet-type electric cleaner according to claim 1, is characterized in that: described anode tube bank (4) both sides are connected with dirt pocket inwall by earthing or grounding means.

6. high-efficient wet-type electric cleaner according to claim 1, is characterized in that: described anode tube bank (4) below is provided with deflector (5), and the level height of described deflector (5) is higher than drainpipe (7).

7. high-efficient wet-type electric cleaner according to claim 1, is characterized in that: described dirt pocket lower sides is also provided with inspection manhole (12).

8. the high-efficient wet-type electric cleaner according to claim 1 to 7 any one, is characterized in that: the external diameter of described anode tube (41) is 250 ~ 400mm, and length is 4 ~ 8m, and its inner wall surface is through roughening treatment.

9. the high-efficient wet-type electric cleaner according to claim 1 to 7 any one, is characterized in that: the material of described anode tube (41) is polypropylene flame redardant.

10. the high-efficient wet-type electric cleaner according to claim 1 to 7 any one, is characterized in that: the material of described cathode line (3) is Hastelloy.