JPH07328479A - Device for preventing damage of porcelain tube - Google Patents

Abstract

PURPOSE:To provide a device for preventing damage of an insulating tube capable of preventing sticking of dust and dew condensation on a supporting glass with out requiring a heating device by supplying a heating gas to an insulating tube room. CONSTITUTION:The inside of the space between a casing 12a of an electric dust collector and a heat insulating armor plate 22 is heated at the time of operating the electric dust collector. The heating gas is sucked into the insulator tube room 10 via a nozzle 24 to heat the supporting glass 16 and is introduced into the inside of the electric dust collector from the inside of the supporting glass 16 via a stool 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porcelain tube damage preventing device, and more particularly to a device for preventing porcelain tube damage due to adhesion of dust or dew condensation on supporting glass in a porcelain tube chamber installed in an electrostatic precipitator.

[0002]

2. Description of the Related Art FIG. 2 is a schematic configuration diagram of an electrostatic precipitator, and FIGS. 3 and 4 are enlarged views of a main portion of the electrostatic precipitator shown in FIG. In the electrostatic precipitator, the porcelain tube chamber 10 insulates a discharge frame 23 having a discharge line 21 to which a high voltage is applied by a supporting glass 16 suspended by a supporting glass 16 through a supporting frame 26.

Further, in order to prevent the dust collected inside the electrostatic precipitator in the supporting glass 16 from being attached, a stool 18 is provided below the supporting glass 16 and sealing air is provided in the porcelain tube chamber 10 via a nozzle 28. It is configured so that dust and corrosive gas from the inside of the electrostatic precipitator do not flow back. Further, in order to prevent dew condensation due to corrosive gas from the inside of the electrostatic precipitator, a heater 30 is installed on the outer peripheral portion of the supporting glass 16, and the supporting glass 16 is heated by the heater 30.

[0004]

As described above, in the porcelain tube chamber of the conventional electrostatic precipitator, a heating device for heating the supporting glass 16 is required in order to prevent dew condensation. Not only does it require energy, but the structure inside the insulator tube is complicated. The object of the present invention is to solve the conventional problems described above, without requiring special energy for heating, to warm the supporting glass with a simple structure of the porcelain tube interior, and to attach dust to the supporting glass. An object of the present invention is to provide a porcelain tube damage prevention device capable of preventing dew condensation on the inner wall surface of a supporting glass.

[0005]

In order to achieve the above-mentioned object, the present invention introduces outside air into a gap between a casing of an electrostatic precipitator and a heat-insulating outer plate covering the outside of the electrostatic precipitator. The heated outside air is introduced into the porcelain tube chamber.

[0006]

The gas in the gap between the casing of the electrostatic precipitator and the heat-insulating outer plate covering the casing of the electrostatic precipitator is heated by the heat energy during operation of the electrostatic precipitator. Therefore, no special heating device for heating is required. Moreover, since the heating device is not required in the porcelain tube chamber, the structure in the porcelain tube chamber is simplified.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the porcelain tube damage prevention device of the present invention in a perspective view of the main parts. A porcelain bushing chamber 10 is installed in the upper part of the main body of the electrostatic precipitator (not shown in FIG. 1). The porcelain bushing chamber 10 is covered with an I-shaped steel material and casings (header plates) 12a, 12b and 12c, respectively. There is.

A discharge electrode suspension rod 14 is arranged at the center of the porcelain tube chamber 10, and the periphery thereof has a frustoconical support glass 1.
A stool 18 which is surrounded by 6 and communicates with the inside of the main body of the electrostatic precipitator is installed below the casing 12c. The outside of the casing 12a is covered with a heat insulating exterior plate (deck plate) 22 that covers the heat insulating material 20, and a nozzle 24 is arranged in a gap between the casing 12a and the heat insulating exterior plate 22. The nozzle 24 has an opening at one end located in the gap between the casing 12a and the heat insulating exterior plate 22, and an opening at the other end communicating with the inside of the porcelain tube chamber 10.

Next, the operation of the porcelain tube damage prevention device constructed as described above will be described. The gas temperature processed by the electrostatic precipitator is usually 100 ° C. to 300 ° C., and the electrostatic precipitator itself is heated to a temperature close to this temperature range, so that the temperature between the casing 12 a and the heat insulating exterior plate 22 is increased. The gap is also heated. Further, since the inside of the electrostatic precipitator device has a negative pressure of about −100 to −200 mmHg due to the outlet fan (not shown), the heating gas in the gap between the casing 12 a and the heat insulating exterior plate 22 is heated. Are sucked into the porcelain tube chamber 10 without the need for a pushing fan. The supporting glass 16 and the like are heated by the suctioned warming gas, and dust adhesion and corrosive gas (for example, in the porcelain tube chamber 10) (for example,
Insulation tube damage and insulation deterioration due to dew condensation of sulfur compounds etc. are prevented.

The heated gas sucked into the porcelain tube chamber 10 moves through the glass or the support glass 16 through the intake hole provided in the bar, and is sent into the main body of the electrostatic precipitator through the stool 18. . There is also a model of the electrostatic precipitator that is operated at a pressure of about +100 to +200 mmHg inside the device. In this case, it is necessary to install a pushing fan for feeding the heated gas into the porcelain tube chamber 10.

In FIG. 1, particularly, in the drawing, the insulator tube chamber 1 on the left side
Although the above-mentioned configuration and operation have been described for No. 0, the same applies to the case of the porcelain tube chamber on the right side of the drawing. Further, in the above-described embodiment, the casing 12a and the heat insulating exterior plate 2 on the ceiling surface are provided.
Although the example in which the heating gas in the gap between the two is supplied to the porcelain tube chamber 10, the heating gas in the gap between the casing 12b on the side surface and the heat insulating exterior plate 22 covering the outside thereof is supplied to the porcelain tube chamber. 10
May be supplied to.

[0012]

As described above, according to the present invention, the heating gas is supplied to the porcelain tube chamber to prevent the supporting glass from being damaged, without the need for a heating device for heating the gas supplied to the porcelain tube chamber,
Insulation deterioration can be prevented. Further, since no special heating device is required, the structure inside the porcelain tube interior can be simplified and power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a porcelain tube damage prevention device of the present invention in a see-through manner.

FIG. 2 is a schematic configuration diagram of an electrostatic precipitator.

FIG. 3 is an enlarged view of an essential part near the porcelain tube of the electrostatic precipitator of FIG.

FIG. 4 is an enlarged view of a main part near the porcelain tube of the electrostatic precipitator of FIG.

FIG. 5 is an explanatory view showing the intake of seal air into the porcelain tube chamber of the conventional electrostatic precipitator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Insulator chamber 12a-12c ... Casing 14 ... Electrode suspension rod 16 ... Support glass 18 ... Stool 20 ... Heat insulation material 22 ... Heat insulation exterior plate 24 ... Nozzle

Claims (1)

[Claims] 1. An outside air is introduced into a gap between a casing of the electrostatic precipitator and a heat insulating exterior plate covering the outside thereof, and heated by heat from the electrostatic precipitator, and the heated external air is transferred to a porcelain tube chamber. A device for preventing damage to porcelain tube characterized by being introduced.