JP2001246287A - Moving electrode type electric dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply build and disassemble temporary scaffoldings for the mounting work and the maintenance work for discharge frames and moving dust collecting grids. SOLUTION: This moving electrode type electric dust collector is provided with a number of discharge frames 14 suspended at given intervals in a casing 12, a number of moving dust collecting grids 15 wound around every other discharge frames and a hopper 13 provided below the casing 12 and storing temporarily collected dust, and a grating 40 for scaffoldings is laid on the upper horizontal face of the hopper 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable electrode type dust collector, and more particularly, to a plurality of discharge frames suspended at a predetermined interval in a casing, and the discharge frames are circulated every other one. The present invention relates to a moving-electrode-type electric precipitator provided with a number of moving precipitating electrodes and a hopper provided below the casing for temporarily storing collected dust.

[0002]

2. Description of the Related Art A moving electrode type dust collector of this type is known as a dust collector for removing dust in boiler exhaust gas from a thermal power plant and exhaust gas from various furnaces for steelmaking. The schematic structure will be described with reference to FIGS.

[0003] In FIG. 4, a moving electrode type electric precipitator 1 is shown.
Reference numeral 0 denotes a casing 12, a hopper 13 below the casing 12, a number of discharge frames 14 and a number of moving dust collection electrodes 15 disposed in the casing 12, and a casing 11 extending from the inlet flue 16 to the casing. Exhaust gas 17 introduced into 12 is removed by the principle of electric dust collection and discharged from an outlet flue 18. The collected dust falls into the hopper 13 and is taken out from the discharge port 19 by a mechanism (not shown).

FIG. 5 is a view taken in the direction of arrows AA in FIG. 4, and a large number of discharge frames 14 are suspended in the casing 12 at predetermined intervals. In addition, a large number of movable dust collecting electrodes 15 are arranged to circulate every other discharge frame 14. FIG. 6 is a side view showing a mounting structure of the discharge frame 14, and FIG. 7 is a view taken along the line BB of FIG. The discharge frame 14 is formed by extending a large number of discharge wires 21 on a lattice-shaped frame body 20. The upper beam 25 and the lower beam 26 of a frame 24 suspended from a porcelain tube 22 via suspension rods 23.
The upper bracket 27 and the lower bracket 28 that protrude from the discharge frames 14 are respectively locked and suspended. The reference numerals 29 and 30 denote the moving dust collection electrode 1.
5 shows the drive wheel and the lower roller of FIG.

FIG. 8 is a perspective view showing a detailed structure of the movable dust collecting electrode 15, wherein an upper driving wheel 29 and a lower roller 3 are provided.
A pair of endless chains 31, 31 are stretched between the endless chains 31, and a plurality of dust collecting electrode plates 32 are engaged with the pair of endless chains 31, 31 at the position of the intermediate portion 33 in the width direction. It is suspended by being stopped, and forms a loop as a whole. The shaft 34 of the drive wheel 29 is rotated by a drive mechanism (not shown), and the rotation of the shaft 34 causes the pair of endless chains 31, 3 meshing with the drive wheel 29.
1 and the plurality of dust collecting plates 32 forming the loop move around every other discharge frame 14.

[0006] Since the height of the movable electrode type electrostatic precipitator 10 usually reaches 20 to 30 meters, it is difficult to integrally produce the entire structure in a factory. For this reason, in assembling the casing, first, the casing 12 is first constructed at the installation location on the site, and then the discharge frame 14 and the movable dust collecting electrode 15 are attached inside the casing 12.

[0007]

However, the interval between the plurality of discharge frames 14 is usually 300 to 400 m.
m, an endless chain 31 of the movable dust collecting electrode 15 and a dust collecting electrode plate 32 must be further arranged in the middle of the narrow space between the discharge frames 14 and 14 incorporated in the casing 12 to fill the space. In order to efficiently mount the discharge frame 14 and the movable dust collecting electrode 15 in the casing 12, it is necessary to construct a temporary work scaffold in the casing 12. For this reason, there is a problem that the labor required for constructing the temporary scaffolding increases, and when the work is completed, the dismantling of the temporary scaffolding also requires labor, and a large number of scaffolding materials have to be carried out of the apparatus. .

Further, the moving-electrode type dust collector 10
It is necessary to inspect and repair the interior regularly or temporarily even after operation, and at each of these maintenances, a temporary scaffold for maintenance must be constructed and dismantled when maintenance is completed. There was a problem that it required a lot of trouble.

An object of the present invention is to solve the above-mentioned problems of the prior art and to simply construct a temporary scaffold for mounting and maintaining the discharge frame 14 and the movable dust collecting electrode 15 in the casing 12. Another object of the present invention is to provide a movable electrode type electrostatic precipitator which can be disassembled.

[0010]

In order to achieve the above object, a moving electrode type dust collector according to the present invention comprises: a plurality of discharge frames suspended at predetermined intervals in a casing; In a movable electrode type electrostatic precipitator including a plurality of moving dust collecting electrodes that circulate every other discharge frame, and a hopper provided below the casing and temporarily storing collected dust, A scaffolding grid is laid on the upper horizontal surface of the hopper.

Further, in the moving electrode type electrostatic precipitator according to the present invention, the grid has a mesh size of 50 to 90 cm,
A ladder leading to the manhole is attached to the upper part of the lattice.

[0012]

FIG. 1 is a sectional view showing an embodiment of the present invention. In FIG. 1, components denoted by the same reference numerals as those described in the related art indicate the same members. In the present embodiment, a scaffold lattice 40 is laid on a horizontal plane above the hopper 13.

FIG. 2 is a perspective view showing details of the hopper 13, and FIG. 3 is a perspective view showing details of the lattice 40. As shown in FIG. 3, the grid 40 is formed by forming a flat steel plate into a vertical shape and setting the pitch P in the XY directions to be 50 to 90 cm. ９０90 cm. This grid 40 is the hopper 13
It is laid on the entire upper horizontal plane. Since the lattice 40 is made of flat steel plates in a vertical shape, the lattice 40 has high strength against a vertical load. Also, even if dust falls while the device is running,
Dust does not accumulate on the upper surface of the lattice 40, and the dust passes directly downward.

The casing 12 extending above the hopper 13
At the selected position, a manhole 42 is provided.
You can get down on zero.

In the above construction, to construct a temporary scaffold in the casing 12 for attaching and maintaining the discharge frame 14 and the movable dust collecting electrode 15 in the casing 12, the manhole 42 is used.
A temporary scaffold is easily completed by carrying in a scaffold board from, laying the scaffold board on the grid 40 and fixing it.
When dismantling a temporary scaffold, it can be easily dismantled in the reverse order of construction.

Since the size of the openings of the grid 40 is 50 to 90 cm, the work can be performed safely and efficiently when the scaffolds are laid on the grid 40 and fixed. If the opening size of the grid 40 is less than 50 cm, when the present apparatus is operated, dust dropped from the upper part accumulates on the grid 40, and the possibility of troubles that block the openings by the bridging phenomenon increases. On the other hand, if the opening size of the lattice 40 exceeds 90 cm, the gap becomes excessively large, and construction and dismantling work of the temporary scaffold become insecure and inefficient.

[0017]

According to the present invention, in a moving electrode type electrostatic precipitator having a large number of discharge frames and a large number of movable dust collecting electrodes in a casing, a grid for scaffolding is provided on an upper horizontal plane of a hopper below the casing. The laying makes it possible to easily construct and disassemble a temporary scaffold for attaching and maintaining the discharge frame and the movable dust collecting electrode in the casing.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing details of a hopper according to the embodiment of the present invention.

FIG. 3 is a perspective view showing details of a grating according to the embodiment of the present invention.

FIG. 4 is a side sectional view showing a general configuration of a moving electrode type electrostatic precipitator.

FIG. 5 is a view taken in the direction of arrows AA in FIG. 4;

FIG. 6 is a side view showing a mounting structure of the discharge frame.

FIG. 7 is a view taken in the direction of arrows BB in FIG. 6;

FIG. 8 is a perspective view showing a detailed structure of a moving electrode.

[Explanation of symbols]

 12 Casing 13 Hopper 14 Discharge frame 15 Moving electrode 40 Lattice 42 Manhole

Claims (2)

[Claims] 1. A large number of discharge frames suspended at predetermined intervals in a casing, a large number of movable dust collecting electrodes circling every other discharge frame, and a plurality of collecting dust poles provided below the casing. A movable electrode type electrostatic precipitator comprising a hopper for temporarily storing collected dust, wherein a grid for scaffolding is laid on a horizontal plane above the hopper. 2. A movable electrode type electrostatic precipitator according to claim 1, wherein said grid has a mesh size of 50 to 90 cm, and a ladder leading to a manhole is provided on an upper portion of the grid. .