CN201154326Y - A dual-zone dipole corona electrostatic precipitator - Google Patents

Abstract

The utility model relates to a double-zone dipole corona electrostatic dust removal device. The device is composed of a dust collector shell 1, a linear corona electrode 2, a dust collection electrode plate 3, a corona electrode plate 4, an anti-corona electrode plate 5, a DC high voltage power supply 6, and a DC negative high voltage power supply 7. The linear corona pole 2 and the dust collection pole plate 3 form a pre-dust collection area, the linear corona pole 2 is connected with the high voltage end of the DC negative high voltage power supply 7, the dust collection pole plate 3 is grounded; the corona pole plate 4 and the counter corona pole The plate 5 forms a secondary dust collection area, the corona plate 4 is connected with the high-voltage end of the DC high-voltage power supply 6, and the anti-corona plate 5 is grounded. Wherein: the corona pole plate 4 and the anti-corona pole plate 5 are both plate-shaped, and both are equipped with thorns, and the burrs on the corona pole plate 4 and the thorns on the anti-corona pole plate 5 are arranged in a staggered manner; The pre-dust collection area and the secondary dust collection area are arranged in sequence along the airflow direction. The utility model has the characteristics of high collection efficiency for fine dust, simple structure and reliable operation.

Description

A dual-zone dipole corona electrostatic precipitator

technical field

The utility model relates to a dual-area dipole corona electrostatic dust removal device, in particular to a dual-area dipole corona electrostatic dust removal device for purifying fine particle pollutants.

Background technique

Electrostatic precipitator is one of the important dust collectors for collecting dust in flue gas, among which wire-plate electrostatic precipitator is the most widely used. Compared with other types of dust collectors, electrostatic precipitators have the advantages of small resistance, low energy consumption, and high collection efficiency, but their collection efficiency is not high for fine dust (Xiang Xiaodong. Research on the theory and application technology of electrocoagulation dust removal. Northeastern University, 2003), in addition, the traditional line plate electrostatic precipitator is difficult to meet the increasingly stringent environmental protection standards (Zhao Yi et al. Application and prospect of bag filter in coal-fired power plants. Journal of North China Electric Power University, 2003, 30 (6) :90-93). Therefore, it is of great significance to study and develop an electrostatic precipitator that can efficiently collect fine dust.

Contents of the invention

The task of the utility model is to provide a dual-zone dipole corona electrostatic precipitator with high collection efficiency for fine dust, simple structure and reliable operation.

In order to achieve the above tasks, the technical solution adopted by the utility model is: the device is composed of a dust collector shell, a linear corona electrode, a dust collection electrode plate, a corona electrode plate, an anti-corona electrode plate, a DC high-voltage power supply, and a DC negative high-voltage power supply. Composition, the linear corona electrode and the dust collecting electrode form the pre-dust collecting area, and the corona electrode and the anti-corona electrode form the secondary dust collecting area. The linear corona electrode is connected with the high-voltage end of the DC negative high-voltage power supply, and the dust collecting plate is grounded; the corona plate is connected with the high-voltage end of the DC high-voltage power supply, and the anti-corona plate is grounded.

Among them: the corona pole plate and the anti-corona pole plate are both plate-shaped, and are equipped with thorns, and the burrs on the corona pole plate and the thorns on the reverse corona pole plate are arranged in a staggered manner; the pre-dust collection area, The secondary dust collection areas are arranged in sequence along the airflow direction.

Due to the adoption of the above technical scheme, the linear corona pole and the corona pole plate of the utility model are all applied with DC high voltage, and the dust collecting pole plate and the counter corona pole plate are both grounded. The high-concentration dust-laden flue gas first enters the pre-dust collection area, and most of the dust is collected in this area, especially the larger particle dust, while the fine dust that has not been captured enters the secondary dust collection area. In this dust collection area, the thorns on the corona plate and the thorns on the counter-corona plate generate corona discharge and back-corona discharge, forming a large number of positive and negative ions and ion wind. The dust collides to charge the dust. Under the action of the ion wind and the electric field force, the fine dust frequently collides and condenses, and moves to the corona plate and the counter corona plate to reach the corona plate and the counter corona plate. After the halo plate is captured.

The advantages of the pole matching form of the utility model are: 1) In the secondary dust collection area, positive corona and negative corona discharges can be generated simultaneously by using a DC high-voltage power supply, thereby enabling the dust in the electric field to realize dipole charging and generate Positive and negative ion wind; 2) Due to the frequent collision of dipole-charged fine dust under the action of ion wind and electric field force, the coagulation effect on fine dust is greatly improved; 3) The utility model adopts dual-zone type, along the The front area of the airflow direction is the pre-dust collection area, and the rear area along the airflow direction is the secondary dust collection area. The large particles of dust are basically captured in the pre-dust collection area, while the fine dust enters the secondary dust collection area, resulting in condensation. And, it is captured under the action of ion wind and electric field force; 4) Since most of the dust is captured in the pre-dust collection area, the corona plate and counter corona electrode in the secondary dust collection area are reduced. The sticky ash on the plate can prolong the cycle of dust removal in the secondary dust collection area; 5) The utility model has simple structure, convenient maintenance, and is easy to be modified on the existing electrostatic precipitator, which is beneficial to popularization and industrialization . Therefore, the utility model has the characteristics of high collection efficiency for fine dust, simple structure and reliable operation.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

A dual-zone dipole corona electrostatic precipitator. As shown in Figure 1, the device consists of a dust collector housing 1, a linear corona electrode 2, a dust collecting electrode plate 3, a corona electrode plate 4, an anti-corona electrode plate 5, a DC high voltage power supply 6, and a DC negative high voltage power supply 7 . The linear corona pole 2 and the dust collection pole plate 3 form a pre-dust collection area, the linear corona pole 2 is connected with the high voltage end of the DC negative high voltage power supply 7, the dust collection pole plate 3 is grounded; the corona pole plate 4 and the counter corona pole The plate 5 forms a secondary dust collection area, the corona plate 4 is connected with the high-voltage end of the DC high-voltage power supply 6, and the anti-corona plate 5 is grounded.

Wherein: the corona pole plate 4 and the anti-corona pole plate 5 are both plate-shaped, and both are equipped with burrs, and the burrs on the corona pole plate 4 and the thorns on the counter-corona pole plate 5 are arranged in a staggered manner; The pre-dust collection area and the secondary dust collection area are arranged in sequence along the airflow direction.

Both the linear corona pole 2 and the corona pole plate 4 of this embodiment are applied with DC high voltage, and the dust collection pole plate 3 and the counter corona pole plate 5 are both grounded. In the pre-dust collection area, the linear corona electrode 2 applies a negative high voltage to generate a corona discharge, which charges the dust entering the pre-dust collection area and moves to the dust collection plate 3 under the action of the electric field force to reach the dust collection plate 3 are collected thereafter. When the high-concentration dust-laden flue gas passes through the pre-dust collection area, most of the dust is captured, while the fine dust that has not been collected enters the secondary dust collection area. In the secondary dust collection area, when a negative (or positive) high voltage is applied to the corona plate 4, the burrs on it form a negative (or positive) corona discharge, which generates a large number of negative (or positive) ions and forms a strong Negative (or positive) ion wind of negative (or positive) ion wind, and the burr on the anti-corona plate 5 of grounding is positive (or negative) corona discharge at this moment, produces a large amount of positive (or negative) ions, produces stronger positive (or negative) ion wind. When the fine dust passes through the electric field composed of the corona plate 4 and the counter corona plate 5, it collides with a large number of positive and negative ions in the electric field, so that part of the dust is positively charged symmetrically, while the other part of the dust is positively charged. Negative electricity. Under the action of ion wind and electric field force, the negatively charged dust moves to the anti-corona plate 5, and the positively charged dust moves to the corona plate 4. Due to frequent collisions, fine dust with opposite charges is easy to generate The particle size becomes larger due to coagulation and is collected in this area.

The advantages of this device are: 1) The front area of the device is the pre-dust collection area, and the back area is the secondary dust collection area. The dust with larger particles is captured in the pre-dust collection area, while the fine dust enters the secondary dust collection area. 2) In the secondary dust collection area, the DC high-voltage power supply 6 can simultaneously generate positive and negative corona discharges, so that the dust in the electric field can achieve dipole discharge. 3) The degree of ash sticking on the thorns in the secondary dust collection area is effectively alleviated, thus prolonging the cleaning cycle; 4) The structure is simple, easy to maintain, and easy to install in the existing electrostatic precipitator Transformation on the Internet is conducive to promotion and industrialization.

This specific embodiment can effectively improve the collection efficiency of fine dust, and has the characteristics of simple structure and reliable operation.

Claims (3)

1, a kind of dual zone type dipole corona electrostatic dust-proof device is characterized in that this device is made up of deduster shell (1), linear corona discharge electrode (2), dust collecting pole plate (3), corona pole plate (4), anti-corona pole plate (5), DC high-voltage power supply (6), negative direct current high voltage power supply (7); Linear corona discharge electrode (2) and dust collecting pole plate (3) are formed pre-dust collection section, and linear corona discharge electrode (2) links dust collecting pole plate (3) ground connection with the high-pressure side of negative direct current high voltage power supply (7); Corona pole plate (4) is formed the secondary dust collection section with anti-corona pole plate (5), and corona pole plate (4) links anti-corona pole plate (5) ground connection with the high-pressure side of DC high-voltage power supply (6).

2, dual zone type dipole corona electrostatic dust-proof device according to claim 1, it is characterized in that corona pole plate (4) and anti-corona pole plate (5) are tabular, and prickle all is installed, the prickle on prickle on the corona pole plate (4) and the anti-corona pole plate (5) is staggeredly arranged.

3, dual zone type dipole corona electrostatic dust-proof device according to claim 1 is characterized in that pre-dust collection section, secondary dust collection section arrange successively along airflow direction.