JPS60126580A - Dwight & lloyd type sintering machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention provides an exhaust fan that adjusts the air volume of a wind box that takes in air from the underside of a pallet conveyor for each wind box or for every several wind boxes; The present invention relates to a Dwight Lloyd type sintering machine that uses a regulator to control the rotational speed of the exhaust fan.

(0) Conventional technology Dwight Lloyd type sintering machine (hereinafter simply referred to as sintering machine)
Usually, as shown in FIG. 1, a bedding ore hopper h, a raw material hopper 01, an ignition furnace d, and an insulating furnace e are provided in order from the upper starting end side of a pallet conveyor α that circulates along a predetermined route. At the bottom of a is the predetermined ffi
+[[A wind box f is provided, and bedding ore is first charged from the bedding ore hopper h onto the moving pallet conveyor, then sintering raw material is charged to a constant layer thickness from the raw material hopper C, and then the point The upper part of the sintering raw material is ignited by the furnace d, and air is taken in from the lower part by the wind box j, thereby sintering the material on the pallet conveyor. The lower end of the pipe is connected to a branch pipe via a damper g, and each branch pipe k is connected to a main exhaust fan k via a main exhaust gas duct l-i and a dust collector], and suction is performed by the main exhaust fan A'. .B indicates the chimney.

By the way, when sintering is performed using the sintering machine described above, in order to perform proper sintering, there must be an appropriate air flow pattern between the ignition part of the raw material and the ore discharge part by the main exhaust fan, and the sintering process It is necessary to adjust the intake air volume by the damper to match this air volume pattern.

The conventional method for adjusting the air volume pattern is to provide a damper 9 for adjusting the air volume for each wind box, and sequentially adjust the opening degree of the damper in accordance with the appropriate air volume pattern. It was done by method.

However, with this adjustment method, the power consumption of the main exhaust fan does not depend on the air volume due to pressure loss due to the damper.・Not only did it not change much even after it was completed, but it was extremely difficult to match the optimal air volume pattern because it only required suction with one or two main exhaust fans and adjustment with a damper.

(c) Purpose of the Invention The present invention was made in view of the problems of the conventional sintering machine, and its purpose is to install an exhaust fan for each wind box or several wind boxes instead of a damper. To provide a sintering machine in which an optimum airflow pattern can be adjusted by controlling the rotational speed of an exhaust fan in a manner that does not increase pressure loss.

B) Structure of the Invention The present invention charges sintering raw materials in layers onto a pallet conveyor that moves around, ignites the upper layer of the sintered raw materials, and sucks air from below the pallet conveyor via a wind box to sinter the raw materials. In a Dwight Lloyd type sintering machine, an exhaust fan is provided in place of a damper on the exit side of the wind box for each wind box or every several wind boxes, and a regulator is provided to control the rotation speed of the exhaust fan. It is set up and configured.

(E) Embodiment An embodiment of the twitroid sintering machine according to the present invention will be described below with reference to the drawings.

FIG. 2 shows a sintering machine according to this embodiment.

In the same figure, the same components as those of the sintering machine shown in FIG. 1 are given the same reference numbers as in FIG. 1, and their explanations will be omitted.

As is clear from the schematic configuration diagram in FIG. 2, the sintering machine of this embodiment is equipped with a small blower or exhaust fan 1 in place of the damper I provided for each wind box f, and the conventional main exhaust The wind machine is omitted. The number of revolutions of the drive motor 2 of each exhaust fan 1 is controlled by a control signal from a controller 4 via a regulator 3. The controller 4 can set the suction air volume corresponding to each wind box, and automatically adjusts the rotation speed of the motor 2 of the corresponding exhaust fan 1 based on the set value. In other words, the controller 4 compares the actual suction air volume measured by the air flow meter 7nK installed in the branch pipe downstream of the exhaust fan J with the set value, and automatically adjusts the output frequency of the regulator 3 so that these values are equal. .

In the operation of the sintering machine with the above configuration, the bullet conveyor a
The charging of bedding ore and sintering raw materials to the sintered ore and the ignition of the sintered ore are carried out in the same manner as in conventional equipment.

On the other hand, the suction air volume is set in the controller 4 for each wind box to match the determined optimal air volume pattern. Then, each exhaust fan is rotated by the motor 2 at a speed according to the set value, and sucks in a desired amount of air.

The sintered exhaust gas sucked by each exhaust fan 2 is sent to a dust collector through a branch pipe h and a main exhaust duct t, and is exhausted from the dust collector through a chimney l.

In the above embodiment, the exhaust fan 1 was provided for each wind box f, but as shown in FIG.
For example, each wind box on the raw material supply side and the sintered ore discharge side is connected to a different exhaust fan 2, and there are several wind boxes with the same set suction air volume (for example, a middle wind box). They may be connected together to a common exhaust fan 1α. Further, the wind boxes on the raw material supply side and the sintered ore discharge side may be connected as a set of two adjacent to each other to a common exhaust fan.

Furthermore, in the above explanation, the number of revolutions of the motor that drives the exhaust fan is set and controlled by a controller, but
It is not necessarily necessary to adopt such a structure, and any structure may be used as long as it is provided with an exhaust fan in place of the damper on the wind box exit side. Further, although the embodiment shows a case where a main exhaust fan is not required, a smaller main exhaust fan may be installed after the dust collector.

(F) Effect As is clear from the above explanation, in sintering according to the present invention, the suction air volume of the exhaust fan is adjusted for each wind box or several wind boxes.
Not only can the suction air volume of the wind box be matched to the optimal air volume pattern, but power consumption can also be minimized.

Note that since the exhaust fans 1 and 1 (ZK are used to suck in exhaust gas containing a large amount of dust), it is preferable to use a wear-resistant one. Also, as the regulator 3, an inverter can be used.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a part of a conventional Dwight Lloyd type sintering machine, Figure 2 is a schematic diagram of a part of a Dwight Lloyd type sintering machine according to the present invention, and Figure 3 shows the arrangement of an exhaust fan. It is a figure showing a modification. α: Pallet conveyor f: Wind box 1, C: Exhaust fan 2,2σ: Motor Patent applicant Sumitomo Metal Industries, Ltd. (4 others)

Claims (1)

[Claims] Dwight Lloyd type sintering, in which sintering raw materials are charged in layers on a pallet conveyor that moves around, and the upper layer of the sintered raw materials is ignited, and air is sucked in from below the Niharenoto conveyor via a wind box for sintering. The Dwight machine is characterized in that an exhaust fan is provided in place of a damper on the exit side of the wind box for each wind box or for every several wind boxes, and a regulator is provided to control the rotation speed of the exhaust fan. Lloyd type sintering machine.