JPS63178815A - Method for operating dust collector - Google Patents

Abstract

PURPOSE:To reduce the consumption of electric power by providing a suction duct to a generation part and controlling the opening of a damper of a suction end part with a signal sent from a micromanometer provided to the suction end part and controlling the number of yevolutions of a dust collection blower with the divergence signal of the damper. CONSTITUTION:Molten iron poured into a ladle r from a furnace body 1 and fumes or the like generated as this time are sucked through two ducts 12, 13 and treated with a dust collector 11. At this time, strength of suction is sensed with the micromanometers 17, 18 provided at the suction end parts of respective ducts and the signals are sent to a controller 21 to control the opening of dampers 15, 16 and then the opening signals are inputted to a controller 23 and the number of revolutions of a blower 10 is controlled.

Description

[Detailed description of the invention] [Industrial application fields] This invention relates to a method of operating a dust collector.

[Conventional technology] Conventionally, in facilities with many dust generating points, such as blast furnaces, for example, it was not necessary to install dust collectors at each dust generating point, but to extend ducts from one dust collector to each dust generating point. Dust collection is carried out by

An electric damper is installed at the suction end of each of the extended ducts, and the opening degree of the damper is adjusted according to the state of dust generation to efficiently collect dust.

[Problems to be solved by the invention] However, the opening degree of the electric damper must be adjusted by the operator each time depending on the state of dust generation, and the operation is troublesome, so it is not used very effectively. Not yet. In reality, in order to prevent dust generation, the damper is fully opened to suck the dust, so the suction blower of the dust collector is always under a heavy load, resulting in high power consumption. Recently, improvements have been made in order to save power by making it possible to change the rotation speed of the suction blower depending on the periods when blast furnace dust is high, such as the beginning and end of tapping, but this also makes it difficult for workers to operate. Because it is a manual operation, there are problems such as it being not utilized.

The object of the present invention is to provide a method of operating a dust collector that can solve the above-mentioned problems.

[Means and effects for solving the problem] The method of operating the dust collector of the present invention is to extend a suction duct from the dust collector to a plurality of dust generation locations, and provide a damper at each suction end to collect dust. In doing so, a micro-pressure gauge is provided at each of the suction ends, and the opening degree of each damper is controlled by the signals from these micro-pressure gauges, and the I! This is characterized by controlling the rotation speed of the tube blower.

In this way, the opening degree of each damper is controlled by the signal from each micropressure gauge to collect dust appropriately, and the dust collection blower is operated at a rotation speed according to the opening degree of each damper, thereby reducing power consumption. We aim to

[Embodiment] A case in which an embodiment of the present invention is applied to dust collection around a blast furnace vestibule will be described with reference to the drawings. Tapping port 2 of furnace body 1
The hot metal from the hot metal flows through a hot metal gutter 3 and is poured into a pot 4. A cover 6 is provided on top of the hot metal trough 3, and a cover 7 with a pot monitoring hole 7a is provided on the 14.

A duct 12 from a dust collector 11 to which a suction blower 10 is connected extends above the taphole 2 where dust is generated, and a duct 13 extends above the ladle 4. The suction end of each duct is provided with an electric damper 15, 16 for controlling the suction state. Further, a low pressure type 17 for monitoring the suction situation around the tap hole is provided at the end of the duct 12, and a low pressure gauge 18 for monitoring the suction situation above the tap hole 14 is provided near the monitoring hole 7a. ing.

The signals from these low pressure types 17 and 18 are input to the regulator 21 and compared with a set value to automatically control the opening degrees of the dampers 15 and 16. That is, if the pressure of the micropressure gauge becomes negative with respect to the reference, the suction is too strong, so the damper opening degree is reduced. Specifically, the pressure of the micromanometer is -201 MIAQ for the standard 1 atm.
If it becomes smaller, reduce the damper opening and reduce the suction force. On the other hand, if the pressure on the micropressure gauge exceeds +10 mAQ relative to the standard 1 atmosphere, the suction is weak and more fume leaks, so the damper opening degree is increased to reduce fume generation.

Further, the opening degree signals of each damper 15 and 160 are input to the regulator 23, the sum of the opening degrees of each damper is calculated, and the rotation speed of the blower 10 is controlled according to the sum of the opening degrees. That is, the sum of the opening degrees of the dampers is divided into several stages, and the optimum rotation speed of the dust collection blower 10 is set in advance according to the division. Then, according to this classification, dust collection blower 1
0 rotation speed is automatically controlled.

In this way, power consumption can be reduced by controlling the opening degree of each damper to an appropriate value and operating the dust collection blower at a rotation speed corresponding to the sum of the opening degrees of each damper.

[Effects of the Invention] This invention is as described above, and can reduce the power consumption of dust collection equipment that collects dust from a large number of dust generation locations.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of equipment to which the method of the present invention is applied and its control flow.

Claims (1)

[Claims] When a suction duct is extended from the dust collector to multiple dust generating locations and a damper is installed at each suction end to collect dust, a micro-pressure gauge is installed at each of the suction ends, and the signals from these micro-pressure gauges are used to In addition to controlling the opening degree of the damper,
A method of operating a dust collector, characterized in that the rotation speed of a dust collector blower is controlled by the opening signals of these dampers.