JPS61118159A - Vertical wet electrical dust precipitator - Google Patents

Abstract

PURPOSE:To prolong the disconnection life of discharge wires, to increase the reliability and the maintenance and to stabilize the performance by making the hanging frames of discharge wires usable as a deck and making them movable up and down. CONSTITUTION:The hanging frames 7 of discharge wires are set in the positions so that the abnormal discharge is not caused between these and the top parts of dust collecting poles. In the left side from the center line, the decks 7 combined with the hanging frames of discharge wires are drawn up for the maintenance by means of a chain block 17 provided to the outside of apparatus and the washing nozzles 13 are taken off. By this method, the inspection and the setup can be safely performed for a short time and the length of discharge wires can be made to the necessary shortest length and the life is prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a vertical wet electrostatic precipitator. - (Prior Art) Conventionally, for example, gas generated from a blast furnace is purified and used as fuel gas, and a vertical wet electrostatic precipitator is known for gas purification. FIG. 3 is an example of a vertical wet type electric precipitator having a conventional segment-type dust collecting electrode, and FIG. 4 is a partial plan view.

In the figure, gas introduced from an inlet gas pipe 1 passes through a gas rectifier 2, a rectifier cleaning device 3, a dust collection box, and is recovered outside the system from an outlet gas pipe 14 as clean gas. In the dust collecting box, dust collecting electrodes 4 are arranged in the form of segments, and a discharge wire 5 is installed in the center of the dust collecting box. Further, the discharge wire 5 is provided on a discharge wire hanging frame 7 and has a discharge wire weight 6. The discharge wire hanging frame 7 is supported by a support insulator 9 provided in an insulator chamber 10 by a discharge wire frame hanging rod 8. 13 is a cleaning device, 15 is an inspection port, 16 is a casing, and 19 is a gas inflow prevention plate.

This type of precipitator has low equipment costs because the ratio of the cross-sectional area of the collecting electrode to the cross-sectional area of the box is close to 100%, and the electrode cleaning device is placed above the collecting electrode and discharge electrode. If you build internal and scaffolding.

There are advantages such as relatively good nozzle maintenance.

However, as mentioned above, a structure with a decking function was not provided, so temporary scaffolding boards were temporarily installed on top of the dust collection pole or on the discharge wire hanging frame during internal inspections.

On the other hand, a vertical wet type electrostatic precipitator equipped with a cylindrical dust collecting electrode is known. This dust collector is equipped with a dust collection electrode support plate, so
It is possible to walk on the support plate, which has the advantage of eliminating the need for temporary installation of a one-inspection deck. However, the ratio of the cross-sectional area of the dust collecting electrode to the cross-sectional area of the box is small, and the equipment cost is high. In addition, the charge voltage in a conventional vertical electrostatic precipitator is 40 to 60K.
V, the vertical distance between the dust collection electrode and the discharge wire hanging frame is 2.
Although 50~3001m1 is sufficient, when using the upper part of the dust collection as an inspection deck, 1500~3001m1 is sufficient.
It was necessary to separate the cables from each other on a 1,800m hanging frame, which increased the length of the discharge wires and increased the string vibrations caused by the discharge excitation force, resulting in discharge wire breakage accidents.

(Problems to be solved by the invention) The present invention solves the above-mentioned problems.
The present invention provides a vertical wet type electrostatic precipitator with a long service life.

(Means and effects for solving the problem) The gist of the present invention is that a dust collection box consisting of a discharge wire and a dust collection electrode is installed in a casing, and an insulator chamber whose top can be opened and closed is provided at the upper end of the casing. The discharge wire is connected to the casing, the discharge wire is suspended on a hanging frame, and a seat is placed on the suspension frame to form a discharge wire hanging frame and inspection deck, and one end of the discharge wire frame hanging rod is fixed to the inspection deck. and the other end is formed to be removably attached to a lifting device inserted into the insulator chamber,
This vertical wet type electrostatic precipitator is characterized in that the discharge wire hanging frame/inspection deck can be raised and lowered.

The present invention will be explained below with reference to the drawings.

FIG. 1 is an explanatory diagram of the present invention. Components having the same explanatory numerals as those of the conventional device will not be described.

In the present invention, the discharge wire hanging frame is covered with a sheet to form the discharge wire hanging frame and inspection deck 7. The discharge wire hanging frame 7 has a discharge wire hanging frame 8, and the other end of the hanging frame 8 is connected to a lifting device, for example, a chain block 17, and is supplied with driving force from a driving device (not shown). Further, the above-mentioned hanging rod 8 passes through a support insulator 9 provided in the insulator chamber 10, and is connected to a chain block 17 at an I pole 12.
It is removable. Since a sealable lid 11 is provided on the top of the insulator chamber IO, it is convenient to introduce the chain block 17. The lid 11 may be a valve, for example.

The discharge wire suspension frame of the present invention also serves as an inspection deck as described above, and the discharge wire 5 suspends a discharge wire weight 6 in accordance with a known example. Further, the discharge wire 5 is given a wire length that compensates for the lifting and lowering of the discharge wire hanging frame 7. Therefore, in the present invention, the discharge wire hanging frame 7 can be raised and lowered by raising and lowering the chain block 17.

In the wet type electrostatic precipitator of the present invention, since the discharge wire hanging frame 7 can be moved up and down as described above, the cleaning device 13-2 is installed in contact with the dust collection box. Therefore, continuous spray cleaning of the dust collection electrode is possible.

An embodiment of the invention is shown in FIG. The right side of the center line shows the state in which the electrostatic precipitator is in operation, and the discharge wire hanging frame 7 is at a position that prevents abnormal discharge from the top of the dust collecting pole. The left side of the center line shows a state in which the discharge wire hanging frame/deck is pulled up with a chain block provided outside the machine and the cleaning nozzle 13 is removed for maintenance. In addition, maintenance of the cleaning nozzle 13-2 attached to the top of the dust collecting pole can be performed by lowering the discharge wire hanging frame.

As explained above, by making the discharge wire hanging frame 7 movable up and down from outside the machine, and by making the frame also usable as a deck, inspection and maintenance can be carried out safely and in a short time, and the discharge wire Since the length can be reduced to the minimum required length, it has the advantage of long life.

In the present invention, the distance between the dust collecting electrode plates is increased to, for example, 600 ml. That is, as the distance between the dust collecting electrode plates increases, it is necessary to increase the distance between the top of the dust collecting electrode and the discharge wire hanging frame.However, according to the present invention, since the discharge wire hanging frame can be moved up and down, the above requirement can be met. I can do it.

Although the present invention has been mainly described above with reference to an example in which the inlet gas pipe is provided at the center of the cylindrical casing and the outlet gas pipe is provided at the upper end of the casing, it is of course not limited to this.

(Effects of the Invention) The present invention enables the discharge wire hanging frame to be used as a deck, and by making it movable upward and downward, the vertical distance between the upper part of the dust collection and the discharge wire hanging frame is maintained during normal use. The length of the discharge wire can be shortened to such an extent that abnormal discharge does not occur, and the length of the discharge wire can be shortened accordingly, making it difficult for breakage to occur.

Furthermore, when maintaining the a-pole cleaning nozzle installed above the dust collector, the deck can be raised or lowered to improve maintainability. Therefore, the discharge wire disconnection life is extended, and equipment reliability is improved. In addition, internal inspection and maintenance are improved, the string vibration width of the discharge wire is reduced, charging is stabilized, and dust collection performance is stabilized.

[Brief explanation of the drawing]

1 is a sectional explanatory view of the present invention, FIG. 2 is a partial plan view of FIG. 1, FIG. 3 is a sectional explanatory view of the conventional example, and FIG. 4 is a partial plan view of FIG. 3. 1... Inlet gas pipe 2... Gas rectifier 3.
...Cleaning device for gas rectifier 4...Dust collecting electrode 5...Discharge wire 6...Discharge wire weight 7...Discharge wire hanging frame and deck 8...
Discharge wire frame hanging rod 9...Support insulator! '□ IO
...Insulator room old...Maintenance lid 12...
I bolt 13...Cleaning device 14...Outlet gas pipe
15... Manhole or inspection opening 16... Casing 17... Chain block for driving discharge wire hanging frame 18...
・Washing nozzle

Claims (1)

[Claims] A dust collection box consisting of a discharge wire and a dust collection electrode is installed inside the casing, an insulator chamber whose top can be opened and closed is provided at the upper end of the casing and is electrically connected to the casing, and the discharge wire is suspended on a hanging frame,
The suspension frame is covered with a seat to form a discharge wire suspension frame and inspection deck, one end of the discharge wire frame suspension rod is fixed to the inspection deck, and the other end is configured to be detachable from the lifting device inserted into the insulator chamber. A vertical wet type electrostatic precipitator characterized in that the discharge wire hanging frame/inspection deck is movable up and down.