CN208066547U - A kind of wet cottrell - Google Patents

Abstract

The utility model discloses a wet-type electrostatic precipitator, which comprises a closed casing, and the casing is provided with a dust-collecting electrode composed of an anode tube bundle group, and a discharge electrode composed of a cathode wire, and the cathode wire is fixed on the cathode On the wire fixed frame, the outer periphery of the discharge electrode is surrounded by a dust collection electrode, and a passage for air flow is formed between the discharge electrode and the dust collection electrode; a spray device is arranged at the upper end of the anode tube bundle; the cathode wire For high-efficiency barbed poles; the top of the shell is equipped with multiple independent insulator boxes, each insulator box is equipped with a sealed insulation layer, and all insulator boxes are equipped with heating devices and automatic temperature control devices. The wet electrostatic precipitator of the utility model has corrosion-resistant electrodes, the electrodes are not easy to swing in the impact of high-speed flue gas, the discharge of the cathode wire is stable, no dew condensation is formed around the power supply insulation box, the insulation performance is high, and the dust collection is extremely difficult to accumulate dust. High dust and fog removal efficiency, long service life.

Description

A wet electrostatic precipitator

Technical field:

The utility model belongs to the technical field of boiler flue gas dedusting, and relates to a wet electrostatic precipitator.

Background technique:

As shown in Figure 3, the flue gas after dust removal, desulfurization and denitrification enters the wet electrostatic precipitator, and tens of thousands of volts of DC high voltage is applied between the anode and cathode wires of the wet electrostatic precipitator. Under the action of a strong electric field, the corona wire A corona layer is generated around the corona layer, and the air in the corona layer undergoes avalanche ionization, thereby producing a large number of negative ions and a small amount of positive ions. This process is called corona discharge; the dust, mist particles and These positive and negative ions collide and charge, and the charged dust and mist particles move toward the anode due to the Coulomb force of the high-voltage electrostatic field; after reaching the anode, the charged charges are released, and the dust and mist particles Collected by the anode, the collected dust is sprayed and washed and flows from the upper part to the lower part of the liquid tank to be separated from the flue gas. The purified flue gas is directly emptied through the upper chimney of the wet electrostatic precipitator.

The existing wet-type electrostatic precipitator has electrodes that are not corrosion-resistant, the cathode line is easy to swing under the impact of high-speed flue gas, the discharge of the cathode line is unstable, dew condensation is easy to condense around the power insulation box, the insulation performance is poor, and the anode tube is easy to accumulate dust. Lead to the problem of poor dust removal effect.

Utility model content:

In order to make up for the deficiencies of the prior art described in the background art, the utility model provides a tubular structure wet electrostatic precipitator for efficiently removing dust particles.

The utility model is realized through the following technical solutions: a wet electrostatic precipitator, comprising a closed casing, the lower side of the casing is provided with an air inlet, the upper part of the casing is provided with an air outlet, and the bottom of the casing is provided with There is a sewage pipe; the housing is provided with a dust collecting electrode composed of anode tube bundles, and a discharge electrode composed of a cathode wire, the cathode wire is fixed on the cathode wire fixed frame, and the periphery of the discharge electrode is surrounded by collector Dust electrode, a channel for air flow is formed between the discharge electrode and the dust collection electrode; the anode tube bundle group is made of conductive glass fiber reinforced plastic, and a spray device is installed on the upper end; It is made of stainless steel; the top of the shell is equipped with multiple independent insulator boxes, each insulator box is provided with a sealed insulation layer, and all insulator boxes are equipped with heating devices and automatic temperature control devices.

In order to prevent the flue gas from corroding the electrodes, the anode tube is made of conductive flame-resistant glass fiber reinforced plastic (CFRP), and the anode tube is arranged in a tube bundle. In order to efficiently puncture the pole line to facilitate discharge.

Furthermore, a backwashing device is installed at the bottom of the wet electrostatic precipitator to facilitate the timely cleaning of the precipitated sludge and improve the working efficiency of the dust collector. The inlet of each flushing pipe is equipped with a pipe filter.

Further, in order to prevent flue gas corrosion, the internal nozzles, flushing, spray pipes and accessories of the dust collector are made of FRPP material.

Further, a flue gas equalizing device is installed at the flue gas inlet of the wet electrostatic precipitator so that the flue gas can evenly flow through the electric field, and the material of the flue gas evenly distributing device is glass fiber reinforced plastic.

Furthermore, the air chamber of the casing is sealed, and the top of the casing is designed as a spherical structure that is not easy to accumulate water.

Further, the wet electrostatic precipitator is equipped with a manhole door. The diameter of the circular manhole door is ф600mm, and the diameter of the rectangular manhole door is 500mm×600mm.

Further, the distances between the discharge electrodes and the dust collection electrodes are equal, and the electric field intensity is relatively uniform.

Furthermore, the flue gas outlet is arranged on the top of the shell to be directly emptied, which can save the flue pipe, and is also conducive to saving energy and improving dust removal efficiency.

Furthermore, the internal anti-corrosion of the wet electrostatic precipitator adopts glass flake anti-corrosion technology, which has strong chemical stability, good thermal stability and long service life.

The working principle of the wet electrostatic precipitator of the present utility model: the basic principle of the wet electrostatic precipitator of the present utility model is basically the same as that of the dry electrostatic precipitator. The dust collector uses the method of electric dust removal to separate aerosols and suspended dust particles in the gas, mainly including the following four complex and interrelated physical processes:

1. Ionization of gas.

2. Coagulation and charging of aerosols and suspended dust particles.

3. Charged dust particles and aerosols move to the electrodes.

4. Spray to clean the plate.

Tens of thousands of volts of DC high voltage is applied between the anode and cathode wires of the wet electrostatic precipitator. Under the action of a strong electric field, a corona layer is formed around the cathode corona wire, and the air in the corona layer undergoes avalanche ionization, thus A large number of negative ions and a small amount of positive ions are produced. This process is called corona discharge; the dust and mist particles entering the wet electrostatic precipitator with the flue gas collide with these positive and negative ions to be charged, and the charged dust and mist particles Due to the action of the Coulomb force of the high-voltage electrostatic field, it moves towards the anode; after reaching the anode, the charge carried by it is released, and the dust and mist particles are collected by the anode, and the collected dust flows from the upper part to the lower part to accumulate liquid after being sprayed and washed. tank, and separated from the flue gas.

The advantages of the utility model: the wet electrostatic precipitator of the utility model, the electrodes are corrosion-resistant, the electrodes are not easy to swing in the impact of high-speed flue gas, the discharge of the cathode line is stable, no dew condensation around the power supply insulation box, high insulation performance, dust collection It is not easy to accumulate dust, has high dust and fog removal efficiency, good energy-saving effect, simple structure, reasonable layout, convenient operation, small footprint, internal anti-corrosion adopts glass flake anti-corrosion technology, strong chemical stability, good thermal stability, and long service life long.

Description of drawings:

The structural diagram of the wet electrostatic precipitator of Fig. 1 utility model embodiment;

A-A direction sectional view in Fig. 2 Fig. 1;

Figure 3 Working principle diagram of wet electrostatic precipitator;

In the figure: 1. Shell, 2. Air inlet, 3. Air outlet, 4. Lower air chamber, 5. Cathode fixing frame, 6. Cathode wire, 7. Anode tube bundle group, 8. Smoke uniform distribution device, 9 . Upper air chamber, 10. Spraying device, 11. Insulator box without leads, 12. Insulator box with leads, 13. Sealed insulation layer, 14. Heating and temperature automatic control device, 15. Liquid effusion tank, 16. Sewage pipe , 17, circulating pool, 18, mud pump, 19, backwash water pipe.

Detailed ways:

In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the implementation modes are not limitations of the utility model.

Query Figure 1 and Figure 2, a wet electrostatic precipitator, including a closed shell 1, the lower side of the shell 1 is provided with an air inlet 2, the upper part of the shell 1 is provided with an air outlet 3, the shell 1 The bottom is provided with a sewage pipe 16; the housing 1 is provided with a dust collection electrode composed of an anode tube bundle group 7, and a discharge electrode composed of a cathode wire 6, and the cathode wire 6 is fixed on the cathode wire fixed frame 5, The periphery of the discharge electrode is surrounded by a dust collector, and a passage for airflow is formed between the discharge electrode and the dust collector. The upper end of the anode tube bundle group 7 is provided with a spray device 10; the anode tube bundle group 7 adopts Made of conductive glass fiber reinforced plastic; the cathode wire 6 is a high-efficiency barbed pole wire made of stainless steel; the top of the housing 1 is equipped with a plurality of independent insulator boxes 11 and 12, and the box body of each insulator box is provided with a sealing insulation layer 13 , All insulator boxes are equipped with a heating and temperature automatic control device 14.

In order to prevent flue gas from corroding the electrodes, the anode tube in this embodiment is made of conductive flame-resistant glass fiber reinforced plastic (CFRP), the anode tube is arranged in a tube bundle, and the anode tube bundle group is made of conductive glass steel with a diameter of φ300*6000mm; the cathode line is made of 2205 stainless steel .

In this embodiment, a backwashing device is installed at the bottom of the wet electrostatic precipitator to facilitate the timely cleaning of the precipitated sludge and improve the working efficiency of the dust collector. The inlets of each flushing pipeline are provided with pipeline filters.

In this embodiment, in order to prevent flue gas corrosion, the nozzles, flushing, spraying pipes and accessories inside the dust collector are made of FRPP material.

In this embodiment, the flue gas inlet of the wet electrostatic precipitator is equipped with a flue gas equalization device 8 so that the flue gas can evenly flow through the electric field, and the flue gas uniform distribution device 8 is made of glass fiber reinforced plastic.

In this embodiment, the housing air chamber is sealed, and the top of the housing is designed as a spherical structure that is not easy to accumulate water.

The wet electrostatic precipitator of this embodiment is equipped with a manhole door. The diameter of the circular manhole door is ф600mm, and the diameter of the rectangular manhole door is 500mm×600mm.

In this embodiment, the distances between the discharge electrodes and the dust collection electrodes are equal, and the electric field strength is relatively uniform.

In this embodiment, the flue gas outlet 3 is set at the top and directly vented, which can save the flue pipe, and is also conducive to saving energy and improving the dust removal efficiency.

The internal anticorrosion of the wet electrostatic precipitator in this embodiment adopts glass flake anticorrosion technology, which has strong chemical stability, good thermal stability and long service life.

The advantages of the embodiment of the utility model: the wet electrostatic precipitator of the utility model, the electrode is corrosion-resistant, the electrode is not easy to swing in the impact of high-speed flue gas, the discharge of the cathode line is stable, no dew condensation is formed around the power supply insulation box, and the insulation performance is high. It is extremely difficult to collect dust, has high dust and fog removal efficiency, good energy-saving effect, simple structure, reasonable layout, convenient operation, and small floor space. The internal anti-corrosion adopts glass flake anti-corrosion technology, which has strong chemical stability and good thermal stability. long lasting.

The above embodiments and accompanying drawings are only used to illustrate the technical solutions of the present utility model, and are not intended to limit the present utility model. The utility model has been described in detail with reference to preferred embodiments, and those of ordinary skill in the art should understand that this technical field Changes, modifications, additions or replacements made by skilled personnel within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims (8)

1. A wet electrostatic precipitator, characterized in that: it comprises an airtight housing, the lower side of the housing is provided with an air inlet, the top of the housing is provided with an air outlet, and the bottom of the housing is provided with a blowdown pipe; The housing is provided with a dust collection electrode composed of anode tube bundles and a discharge electrode composed of cathode wires. The cathode wires are fixed on the cathode wire fixing frame, and the periphery of the discharge electrodes is surrounded by dust collection electrodes. A channel for air flow is formed between the discharge electrode and the dust collection electrode; the anode tube group is made of conductive glass fiber reinforced plastic, and a spray device is arranged on the upper end; the cathode line is a high-efficiency prickly pole line, and the material is stainless steel; The top of the shell is equipped with a plurality of independent insulator boxes, each insulator box is equipped with a sealed insulation layer, and all insulator boxes are equipped with heating devices and automatic temperature control devices. 2. The wet electrostatic precipitator according to claim 1, characterized in that: a backwashing device is installed at the bottom of the wet electrostatic precipitator, and pipeline filters are installed at the inlets of each flushing pipeline. 3. The wet electrostatic precipitator according to claim 1, characterized in that: a flue gas equalization device is installed at the flue gas inlet of the wet electrostatic precipitator, and the material of the flue gas even distribution device is glass fiber reinforced plastic. 4. The wet electrostatic precipitator according to claim 1, characterized in that the top of the shell of the wet electrostatic precipitator has a spherical structure. 5. The wet electrostatic precipitator according to claim 1, characterized in that: the wet electrostatic precipitator is equipped with a manhole door, the diameter of the circular manhole door is ф600mm, and the rectangular manhole door is 500mm×600mm. 6. The wet electrostatic precipitator according to claim 1, characterized in that the distances between the discharge electrodes and the dust collection electrodes are equal. 7. The wet electrostatic precipitator according to claim 1, characterized in that: the flue gas outlet is provided on the top of the shell to directly vent. 8. The wet electrostatic precipitator according to claim 1, characterized in that glass flakes are used for internal corrosion protection of the wet electrostatic precipitator.