RU74314U1 - ELECTROFILTER WITH INCREASED ELECTRODE SYSTEM HEIGHT - Google Patents

Abstract

The invention relates to electrostatic precipitators - apparatus for capturing the dispersed phase from gases and can be used in the power industry, metallurgy, cement and other industries during the reconstruction and creation of new gas purification systems.

The essence of the invention lies in the development of electrostatic precipitators with a height of the electrode system of 15 ... 24 m, having a two-level system of regeneration of electrodes, thereby increasing the productivity and efficiency of electrostatic precipitators.

Description

The invention relates to electrostatic precipitators - apparatus for trapping the dispersed phase from gases and can be used in the power industry, metallurgy, cement and other industries.

It is known [1] a large number of electrostatic precipitators UG, EGA, UGT, OGP and others. These electrostatic precipitators have different sizes and are designed for different performance, but in all these devices the height of the precipitation and corona electrodes does not exceed 12 m.

An analogue of this electrostatic precipitator is the most common serial devices of the EGA type [2]. The height of the precipitation electrodes of these electrostatic precipitators is 4; 6; 7.5; 9; 12 m

The mechanisms of shaking the precipitation electrodes are located in the lower part, the direction of impact on the precipitation electrodes is horizontal. Shaking of the corona electrodes is carried out laterally by horizontal pulses.

The disadvantage of the analogue is the low performance of the electrostatic precipitator, due to the impossibility of increasing the height of the electrodes due to their unsatisfactory shaking and, as a result, a reduced degree of gas purification. To ensure the cleaning of large volumes of gases, designers are forced to install several electrostatic precipitators in parallel. Such a solution has significant drawbacks: the high cost of the gas treatment installation, the large occupied production area.

To eliminate the disadvantages of EGA electrostatic precipitators, EHD type electrostatic precipitators (prototype) were developed. In these electrostatic precipitators, precipitation electrodes having a height of 9 m are arranged in two tiers in height; shaking of the precipitation electrodes is carried out in the lower part of each tier by horizontal pulses [2]. Shaking of the corona electrodes is also carried out laterally by horizontal pulses.

As the operating experience of two-tier electrostatic precipitators has shown, their degree of purification does not exceed 98%, which is insufficient to meet current requirements for dust emissions from electrostatic precipitators.

EHD electrostatic precipitators have intermediate bins, which complicates and increases the cost of their construction.

The proposed electrostatic precipitator with an increased height of the electrode system is devoid of the disadvantages of analog and prototype.

The difference of the proposed electrostatic precipitator is that the height of the precipitation and corona electrodes is in the range of 15 ... 24 m, and the shaking of the precipitation electrodes is carried out at two levels: in the lower part - by horizontal shock pulses, and in the upper part - by vertical shock pulses, and shaking of the corona electrodes is carried out by vertical pulses from above.

In addition, in the proposed electrostatic precipitator, the shaking of the precipitation electrodes in the lower part is carried out by horizontal shock pulses, and in the upper part by vertical shock pulses.

To ensure the required efficiency of shaking off the corona electrodes, they are shaken on two

levels: in the upper part - by vertical impulses, in the lower part - by horizontal impulses.

Figure 1 shows an electrostatic precipitator with an increased height of the electrode system.

The list of positions in figure 1:

1 - electrostatic filter housing;

2 - precipitation electrode;

3 - corona electrode.

The arrows on the electrodes indicate the places of application of shock pulses when shaking the electrodes.

In the case of the electrostatic precipitator (1), precipitation electrodes (2) and corona electrodes (3) are installed. The height of the electrodes is 15 ... 24 m.

The operation of the electrostatic precipitator is as follows:

dusty gas enters the electrostatic precipitator housing, where dust is deposited on the electrodes under the influence of an electric field. For normal operation of the electrostatic precipitator, dust from the electrodes is periodically removed. Due to the fact that the shaking of the precipitation electrodes is carried out at two levels - in the lower and upper parts - the entire surface area of the precipitation electrode is subjected to increased shaking accelerations.

As shown by experimental measurements in bench conditions, the acceleration is not lower than 150 "g". This provides the required degree of cleaning the surface of the collecting electrodes from dust.

The use of combined shaking of the corona electrodes - above with vertical pulses, and below with horizontal pulses - also provides the required

acceleration, the necessary purity of the corona elements and, therefore, their normal functioning.

The proposed electrostatic precipitator having an electrode height of up to 24 m allows:

- provide the required emission standards, which are 100 and even 50 mg / m ³ ;

- carry out the reconstruction of obsolete electrostatic precipitators on the same occupied area for gas purification, which gives a significant economic effect;

- reduce the cost of servicing the gas cleaning system, as it decreases the number of serviced electrostatic precipitators;

- reduce the total hydraulic resistance of the gas cleaning system and, as a result, reduce the cost of operating costs for dust removal of gases.

The implementation of this invention is technically feasible. Separate units and shaking devices were generally implemented and tested in bench and industrial conditions and gave positive results.

Literature.

1. Aliev G.M.-A. Technique of dust removal and purification of industrial gases. Directory. M, Metallurgy, 1986, pp. 256-266.

2. Gas purification equipment. Catalog TsINTIkhimneftemash.

M., 1988, pp. 4 ... 8.

Claims (2)

1. The device of the electrostatic precipitator with an increased height of the electrode system, consisting of a housing, precipitation and corona electrodes, shaking mechanisms, characterized in that the height of the precipitation electrodes is in the range of 15 ... 24 m, and the shaking of the precipitation electrodes is carried out at two levels: in the lower parts - horizontal shock pulses, and in the upper part - vertical shock pulses, and shaking of the corona electrodes is carried out by vertical shock pulses from above. 2. The electrostatic precipitator device according to claim 1, characterized in that the shaking of the corona electrodes is carried out at two levels: in the upper part - by vertical shock pulses, and in the lower - by horizontal pulses.