JPH0446187B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an electrostatic precipitator, and more specifically to an electrostatic precipitator comprising a receiving electrode formed of an inverted U-shaped forked rod and a spray device. It concerns dust equipment.

<Prior art> Conventionally, as an electrostatic precipitator, a Kottorel type consisting of a linear discharge electrode 1 and a plate-shaped receiving electrode (collecting electrode) 2 as shown in Fig. 2 was first developed in a foreign country. , and a wide variety of discharge electrodes 1 and receiving electrodes 2 used in these devices, as shown in FIGS. 3 and 4, respectively, have been developed and used each time. Furthermore, in Japan, a plate-shaped discharge electrode 1 with discharge meters 3 protruding from the left and right edges parallel to the receiving electrode 2 as shown in Fig. 5 is used, and a shock is applied to the receiving electrode 2. A NAFCO-type electrostatic precipitator equipped with a hammer mechanism that allows for 30-minute operation, and a Hurler-type electrostatic precipitator in which the discharge electrode 1 and the receiving electrode 2 are each made of round pipes as shown in Figure 6 have been developed and used. It was coming. Also, devices such as those shown in FIGS. 7 and 8 have been used, which are partially improved versions of the Hurler type, or arranged in combination with the Kottrel type. Furthermore, recently, a device as shown in FIG. 9 has been developed in which the discharge electrode 1 is made of a saw blade and the receiving electrode 2 is made of double wire mesh.

On the other hand, methods in which the electrodes are moved, as shown in Japanese Patent Publication No. 59-19743, Japanese Patent Publication No. 59-48670, and Japanese Patent Publication No. 59-50383, and systems equipped with a re-scattering prevention device have also been developed.

In addition, an apparatus has also been developed in which the receiving electrode 2 is constructed of a double wire mesh as shown in FIG. 9, a predetermined gap is provided between the front and back wire meshes, and spraying can be performed without causing sparks during charging between the two. ing.

<Problems to be solved by the invention> However, all of the electrostatic precipitators according to the conventional techniques as described above consume a lot of power (Kw), therefore, require a very high voltage, and the discharge capacity of the discharge electrode is limited. Further, there were disadvantages such as that it was difficult to efficiently clean dust and the like that had adhered around the receiving electrode by spraying a chemical solution or the like using a spray device or the like.

The device according to the present invention is a completely new technology developed in view of these drawbacks of the conventional technology, and in particular, it can easily and reliably spray a chemical solution, and the spray can be used to clean the receiving electrode. The purpose of the present invention is to provide an apparatus that can reduce the resistance value of dust by creating a moist state or the like around it, and can solve the reverse ionization phenomenon caused by high-resistance substances.

<Means for Solving the Problems> The apparatus according to the present invention, for example, as shown in FIG.
The receiving electrode 4 is an inverted U made of pipe steel, square steel, round steel, etc.
A shock transmitting weight 6 is provided at the lower end of a two-pronged rod 10, and a large number of receiving electrodes 4 are mounted in parallel on a horizontal frame 7 at a predetermined interval. Electrodes 8 are arranged in parallel at positions corresponding to the receiving electrodes 4, and a large number of discharge needles 9 are provided protruding from both sides of the discharge electrodes 8 at right angles to the receiving electrodes 4. Further, a spray device 11 is provided at a side position of the rod 10, and a tip nozzle 1 is attached to the tip of the device 11.
2 is arranged in the gap between the prongs of the forked rod 10.

<Function> As described above, the position according to the present invention is such that the receiving electrode 4 is composed of a forked rod 10, and a spray device 11 is provided at a side position of the receiving electrode 4. As shown in FIGS. 1 and 10, the structure is such that liquid particles 13 and the like can be sprayed into the gap even during charging, so that the receiving electrode 4 can be cleaned or moistened by this spray. By creating this, it is possible to completely solve the reverse ionization phenomenon caused by high-resistance materials.

In particular, in the device of the present invention, as is clear from FIG. 10, the liquid particles 13 sprayed from the tip nozzle 12 enter the inside of the receiving electrode 4 for collecting dust,
Some of the extremely fine particles 13a of the liquid particles 13 flow out between the electrodes, but are immediately charged and adsorbed to the receiving electrode 4.

<Example> An example of the apparatus according to the present invention will be explained in detail using simplified diagrams. In FIGS. It is constructed by installing impact transmitting weights 6 at both lower ends of a forked rod 10 of the mold and suspending them in parallel from a horizontal frame 7, and a spray device 11 is installed at a side position of the receiving electrode 4. is provided, and liquid particles 1 are injected from the tip nozzle 12 into the gap between the prongs of the forked rod 10.
It is constructed so that it can spray 3.

Also, when this receiving electrode 4 is subjected to an impact via a hammer mechanism or the like, this impact is transmitted to the weight 6, a force is transmitted from the outer weight 6 to the inner weight 6, and a force is generated in the opposite direction due to the reaction. The vibration is transmitted back like a pendulum, and the principle of a tuning fork is also added to constantly give a slight vibration to the receiving electrode 4, thereby making it possible to make the dust attached to the receiving electrode 4 fall.

In the figure, reference numeral 8 denotes a discharge electrode, which is constructed by protruding a large number of discharge needles 9 from above and below both sides of a square pipe so as to be perpendicular to the receiving electrode 4.

<Effects of the Invention> Since the device according to the present invention has the above-described structure and operation, it is possible to spray a chemical solution or the like into the gap between the forked rod-shaped receiving electrodes and clean dust, etc. attached to the receiving electrodes very efficiently. By creating a moist state around the receiving electrode, it is possible to solve the reverse ionization phenomenon caused by high resistance substances. This device has features such as being able to carry out the above action by spraying a chemical solution or the like from the device.

[Brief explanation of drawings]

FIG. 1 is a simplified explanatory diagram of the device of the present invention, FIGS. 2 to 9 are explanatory diagrams showing conventional examples, and FIG.
FIG. 3 is an explanatory diagram showing a spray state of a chemical liquid in the device shown in the figure. 1 and 8 are discharge electrodes, 2 and 4 are receiving electrodes, 3 and 9 are discharge needles, 5 and 10 are rods, 6 is a weight, 7 is a horizontal frame, 11 is a spray device, 12 is a nozzle, and 13 is a liquid particle. be.

Claims (1)

[Claims] 1. A large number of receiving electrodes each having impact transmitting weights provided at both lower ends of an inverted U-shaped forked rod are arranged in parallel on a horizontal frame,
An electrostatic precipitator characterized in that a spray device is disposed on the side of the forked rod of the receiving electrode.