JP3019526U - Coaxial cylindrical white smoke removal device - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to remove white smoke and mist-like trace contaminants from factory flue gas. [Structure] An air inlet (3) is provided on the lower surface of a prismatic or cylindrical casing (8) in which a cylindrical electrode (2) is formed.
Provide an air outlet on the top surface. The inner diameter of the cylindrical electrode (2) is 80 mm or less, and the high voltage discharge wire (1) is stretched at the center by the high voltage connector (7) and the insulator (6) and is installed by the tapered tube (5).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrostatic precipitator that allows air to flow between electrodes to which a high voltage is applied to electrostatically remove white smoke and mist in factory exhaust.

[0002]

[Prior art]

 The electrostatic precipitator uses a linear or needle-shaped charging electrode to charge fine particles in the air, such as dust in the air and factory flue gas, and then passes the dust collecting electrode plates with different polarities to generate Coulomb force. It cleans the atmosphere by electrostatically adsorbing fine particles. Conventionally, in the structure of an industrial electrostatic precipitator, a discharge electrode for corona discharge is provided at the center of a cylindrical dust collecting electrode, and the distance between the dust collecting electrode and the discharge electrode is 12.5 cm. In recent years, the adoption of a large gap value of 20 to 30 cm has become popular. There is also a method of locally eliminating white smoke by using an afterburner as a device for eliminating white smoke to reduce it to saturated steam or less, but the equipment becomes bulky, the running cost is high, and heavy oil is burned to further reduce the environment. There is also the fatal flaw of pollution.

[0003]

[Problems to be solved by the device]

 However, the dust collecting electrode with such a conventional structure clears the standard value for harmful substances such as dust in factory smoke, but is not effective for mist-like substances such as white smoke. No electric dust collector has ever been invented to eliminate white smoke from a factory chimney.

The present invention has been made to solve the above problems, and its purpose is to remove white smoke and mist-like trace pollutants in factory exhaust gas.

[0005]

[Means for Solving the Problems]

 The white smoke removing device of the present invention is a cylindrical electrostatic precipitator that electrostatically adsorbs and removes suspended particles such as factory smoke by applying a high voltage to a thin metal wire stretched in a metal cylindrical tube. The distance between (1) and the cylindrical electrode (2) is as narrow as 40 mm or less, and a sufficiently strong Coulomb force acts on charged particles, and the cylindrical electrode (2) is sucked and liquefied to remove white smoke and mist-like substances. And the structure.

[0006]

[Action]

 According to the white smoke removing device having the above structure, the white smoke that has entered the cylindrical electrode (2) from the air intake (3) is charged by the high-voltage discharge wire (1) stretched at the center of the cylindrical electrode (2). After that, it is electrostatically adsorbed on the cylindrical electrode (2) and becomes clean air, which is discharged from the air outlet (4).

[0007]

【Example】

 Embodiments of the present invention will be described below. FIG. 1 is a side sectional view showing the internal structure of an embodiment of the present invention, and FIG. 2 is a perspective view showing its appearance. In the figure, (8) is a casing of the white smoke removing device of the present invention, which is formed of a rigid material such as a thin metal plate into a columnar shape or a prismatic shape, and the inside thereof has a cylindrical electrode (2) and a high voltage. A discharge line (1) is formed. (3) is an air inlet provided on the lower surface of the casing (8) for removing white smoke and mist-like substances by introducing them into the cylindrical electrode (2) through the tapered tube (5). (4) is an air outlet for discharging the air purified by the cylindrical electrode (2).

Next, the internal structure of this embodiment will be described. (2) is a cylindrical electrode formed by forming a thin metal plate into a cylindrical shape, and is erected at the center of the device by a tapered tube (5). (1) is a high-voltage discharge wire using a stainless wire, which is stretched at the center of the cylindrical electrode (2) by a high-voltage connector (7) installed on the upper surface of the device and an insulator (6) installed on the lower surface. ing.

The dust collecting function of the white smoke removing device having the above configuration will be described. When a high-voltage power supply (not shown) is turned on, the positive voltage generated by the high-voltage power supply is applied to the high-voltage discharge line (1), and similarly, the negative voltage is applied to the cylindrical electrode (2) inside the cylindrical electrode (2). Then the corona discharge starts. At this time, relatively large dust in the factory flue gas is collected by the conventional industrial electrostatic precipitator, and suspended particulates such as white smoke and mist which cannot be collected in the cylindrical electrode (2) are sucked. The white smoke sucked into the cylindrical electrode (2) positively charges fine particles such as dust and white smoke by corona discharge of the high-voltage discharge line (1), and the cylindrical electrode (2) to which a negative voltage is applied. It is electrostatically adsorbed, but in the present invention, fine particles such as white smoke and mist can be adsorbed and removed by making the distance between the high-voltage discharge line (1) and the cylindrical electrode (2) extremely narrow, from 20 mm to 40 mm. According to the mist adsorption test conducted by the applicant, when the size of the cylindrical electrode (2) is 40 mm in inner diameter, 500 mm in length, and 2 m / s in wind speed, the mist can be completely removed at the applied voltage of 7 kV, and a considerable effect can be obtained. Was given.

In addition, in this embodiment, an experiment is conducted by itself, but in order to install the device in an actual chimney, a plurality of devices are connected in parallel according to the inner diameter of the chimney, and the cost and required dust collection efficiency are set. It may be arbitrarily set in consideration of the above.

[0011]

[Effect of device]

 According to the white smoke removing device of the present invention, it is possible to adsorb and remove suspended particulates such as white smoke and mist in factory exhaust. Also, by connecting multiple devices in parallel according to the inner diameter of the chimney of the factory, the charging rate of fine particles such as white smoke and mist can be increased. Can be up. Moreover, the present invention has a simple structure, and as a result, it is possible to provide an inexpensive white smoke removing device with excellent dust collection efficiency.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an internal structure of an embodiment of the present invention.

FIG. 2 is a perspective view showing the external appearance of an embodiment of the present invention.

[Explanation of symbols]

 1 ... High-voltage discharge wire 2 ... Cylindrical electrode 3 ... Air inlet 4 ... Air outlet 5 ... Taper tube 6 ... Insulator 7 ... High-voltage connector 8 ... Casing

Claims (2)

[Scope of utility model registration request] 1. A high-voltage thin wire (discharge wire) in a cylindrical electrostatic precipitator for electrostatically adsorbing and removing suspended fine particles such as factory smoke by applying a high voltage to a thin metal wire stretched in a metal cylindrical tube.
The distance between (1) and the cylindrical electrode (2) is narrowed to 40 mm or less, and a sufficiently strong Coulomb force acts on the charged particles, and the cylindrical electrode (2) is sucked and liquefied to remove white smoke and mist-like substances. White smoke removal device. 2.