Device for reducing start-up oxygen content of sintering machine

Abstract

The utility model relates to the technical field of sintering, and particularly discloses a device for reducing oxygen content in starting of a sintering machine, which comprises the sintering machine, an air bellow, a flue, an igniter, a fire-resistant tarpaulin, a tarpaulin retracting and releasing device and an air bellow turning plate, the sintering machine is connected with the flue through the air bellow, and an inlet end of the sintering machine is connected with the igniter. The last three bellows, connected with the flue, of the tail end of the sintering machine are provided with bellows turning plates, a tarpaulin folding and unfolding device is arranged at the position of the last one bellows, the tarpaulin folding and unfolding device is connected with the tarpaulin, and the tarpaulin is put down to cover the inlet end of the sintering machine. When the sintering machine is started, ineffective wind can be effectively prevented from entering the system by covering the fire-resistant tarpaulin, so that the oxygen content of a desulfurization inlet is reduced, the oxygen content standard folding coefficient is reduced, rapid heating is realized, and the bed building time of a circulating fluidized bed is shortened; and the fan operation loads of the main exhaust fan and the booster fan are reduced, the sintering stability is ensured while the power consumption is reduced, secondary shutdown temperature rise is avoided, and rapid production recovery is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sintering technical field, concretely relates to a device that sintering machine reduces oxygen content of starting. BACKGROUND

[0002] At present, the sintering machine wind box flap is damaged, material is blocked and other non-stop maintenance reasons in the production process, most of the sintering machine original design except the machine head and tail wind box flap can be retained, the rest of the wind box is not provided with wind box flap, which leads to the sintering machine in long time stoppage of work after the material starting, the trolley after the igniter is in idle state, there is no mixed material covering or wind box flap effective blocking, leading to the main exhaust air volume short circuit, the effective air volume through the mixed material is less, therefore, the frequency of main exhaust fan and booster fan needs to be increased to increase the air volume and then improve the effective air volume through the mixed material, and the measure leads to the increase of fan power consumption.

[0003] On the other hand, due to the air volume short circuit, the mixed material cannot be completely burned through from the ignition to the sintering machine tail, and needs to be stopped for secondary heating, which not only leads to the further increase of power consumption, but also leads to the fluctuation of mixed material moisture after the secondary heating is finished, resulting in the increase of return ore quantity.

[0004] The main exhaust inhales a large amount of air in the sintering starting process, on the one hand, causes the increase of desulfurization inlet oxygen content, and the high ring folding mark data, and at the same time, for the semi-dry desulfurization, the inhaling of cold air prolongs the establishment time of circulating fluidized bed, affects the desulfurization efficiency, greatly increases the risk of environmental protection exceeding the standard, therefore, improving the starting status has important significance for reducing power consumption, return ore quantity and environmental protection emission. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a device that sintering machine reduces oxygen content of starting, to solve the problems in the above background technology.

[0006] In order to realize the above object, the utility model provides the following technical scheme:

[0007] A device that sintering machine reduces oxygen content of starting, including sintering machine, wind box, flue, igniter, the sintering machine is connected with the flue through the wind box, and is connected with the igniter at the inlet end, still includes fireproof tarpaulin, tarpaulin retraction device, wind box flap, the tail end of the sintering machine is connected with the flue, and the last three wind boxes are provided with the wind box flap, and the tarpaulin retraction device is arranged at the position of the third wind box from the end, the tarpaulin retraction device is connected with the tarpaulin, and the lower tarpaulin covers the inlet end of the sintering machine.

[0008] Preferably, the tarpaulin winding and unwinding device comprises a base, a reel motor, a speed reducer, a reel, the reel motor is fixed on the base, the reel motor is connected with the speed reducer, and the speed reducer is connected with the reel, and the refractory tarpaulin is wound on the reel and fixed at one end of the reel.

[0009] Preferably, the PLC control system is further connected with the motor of the sintering machine and the reel motor.

[0010] Preferably, the ignition heater heat preservation cover is arranged at the inlet end of the sintering machine and covers the outside of the ignition heater.

[0011] Compared with the prior art, the tarpaulin winding and unwinding device has the beneficial effects that: the refractory tarpaulin covers the sintering machine from the ignition heater to the third-to-last wind box, a tarpaulin winding and unwinding device is arranged above the third-to-last wind box flap of the trolley, the tarpaulin winding and unwinding device is composed of a reel, a reel motor and a speed reducer, the reel motor is connected with the speed reducer and fixed on the base, the reel motor and the motor of the sintering machine are connected through the PLC control system to realize synchronous operation, the system can effectively block invalid air from entering when the sintering machine is started through the refractory tarpaulin, thereby reducing the oxygen content at the desulfurization inlet, reducing the oxygen content conversion coefficient, realizing rapid heating and providing conditions for the establishment of the fluidized bed, and the rapid increase of the temperature at the desulfurization inlet can reduce the bed building time of the circulating fluidized bed; in addition, the coverage of the refractory tarpaulin increases the effective air volume ratio of the mixed and uniform material on the trolley, reduces the operating load of the main exhaust fan and the booster fan, reduces the power consumption while ensuring the stability of sintering, avoids secondary shutdown and heating to realize rapid production, and the measure has important significance for energy saving and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the overall structure principle diagram of the device of the utility model;

[0013] Figure 2 It is the plan view of the device of the utility model;

[0014] Figure 3 It is the structure principle diagram of the tarpaulin winding and unwinding device of the utility model.

[0015] In the drawing: sintering machine 1, wind box 2, flue 3, ignition heater 4, refractory tarpaulin 5, tarpaulin winding and unwinding device 6, base 61, reel motor 62, speed reducer 63, reel 64, wind box flap 7, PLC control system 8, motor 9, ignition heater heat preservation cover 10, mixed and uniform material 11, cloth material system 12. DETAILED DESCRIPTION

[0016] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Embodiments

[0017] Please refer to Figure 1 - Figure 3 As shown in FIG. 1, a device for reducing oxygen content during start-up of a sintering machine, comprising a sintering machine 1, a wind box 2, a flue 3, an igniter 4, the sintering machine 1 is connected to the flue 3 through the wind box 2, and the igniter 4 is connected to the inlet end of the sintering machine 1, further comprising a fireproof tarpaulin 5, a tarpaulin winding and unwinding device 6, and a wind box flap 7, the third wind box 2 from the end of the sintering machine 1 connected to the flue 3 is provided with the wind box flap 7, and the tarpaulin winding and unwinding device 6 is arranged at the position of the third wind box 2 from the end, the tarpaulin winding and unwinding device 6 is connected to the fireproof tarpaulin 5, and the fireproof tarpaulin 5 is lowered to cover the inlet end of the sintering machine 1.

[0018] The tarpaulin winding and unwinding device 6 comprises a base 61, a reel motor 62, a speed reducer 63, and a reel 64, the reel motor 62 is fixed on the base 61, the reel motor 62 is connected to the speed reducer 63, the speed reducer 63 is connected to the reel 64, and the fireproof tarpaulin 5 is wound on the reel 64 and fixed at one end of the reel 64.

[0019] Further comprising a PLC control system 8, the PLC control system 8 is connected to the motor 9 of the sintering machine 1 and the reel motor 62, and through the control of the PLC control system 8, the sintering machine 1 and the reel 64 can run at the same speed.

[0020] Further comprising an igniter heat preservation cover 10, the igniter heat preservation cover 10 is arranged at the inlet end of the sintering machine 1 and covers the outside of the igniter 4.

[0021] As Figure 1As shown, the material distribution system 12 sends the mixed material 11 into the inlet end of the sintering machine 1, the igniter 4 on the igniter heat preservation cover 10 above the mixed material can ignite the sintering material 11, the refractory tarpaulin 5 is lowered from the igniter 4 to the third-to-last air bellow 2 before starting, and the air bellow flap 7 needs to be closed during the starting process and before the end of the mixed material 11 reaches the first air bellow flap 7; a tarpaulin folding device 6 is arranged above the third-to-last air bellow flap 7, and the reel motor 62 and the motor 9 of the sintering machine 1 are controlled by the PLC control system 8 to run at the same speed. When the sintering machine 1 starts, the refractory tarpaulin 5 can effectively block the invalid wind from entering, thereby reducing the oxygen content at the desulfurization inlet, reducing the oxygen content coefficient, and realizing rapid heating to provide conditions for the establishment of the fluidized bed. At the same time, the rapid increase of the desulfurization inlet temperature can reduce the bed building time of the circulating fluidized bed. In addition, because of the coverage of the refractory tarpaulin 5, the effective air volume ratio of the mixed material on the trolley is increased, the fan operation load of the main exhaust fan and the booster fan is reduced, the power consumption is reduced, the stability of sintering is ensured, secondary shutdown and heating are avoided, and rapid production is realized.

[0022] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A device for reducing oxygen content at start-up of a sintering machine, comprising a sintering machine, a wind box, a flue, an igniter, the sintering machine being connected to the flue through the wind box, and the sintering machine being connected to the igniter at an inlet end of the sintering machine, characterized in that: The tarpaulin is also fireproof, and the tarpaulin winding and unwinding device, the wind box flap are also included. The third wind box from the end of the sintering machine connected with the flue is provided with a wind box flap, and the tarpaulin winding and unwinding device is arranged at the position of the third wind box from the end. The tarpaulin winding and unwinding device is connected with the tarpaulin, and the lower tarpaulin covers the inlet end of the sintering machine. ​ 2. The apparatus for reducing the oxygen content at the start of the firing process of a firing machine according to claim 1, characterized in that: The tarpaulin winding and unwinding device comprises a base, a reel motor, a speed reducer and a reel. The reel motor is fixed on the base, the reel motor is connected with the speed reducer, and the speed reducer is connected with the reel. The fireproof tarpaulin is wound on the reel and fixed at one end of the reel.

3. The apparatus for reducing the oxygen content at the start of the firing process of a firing machine according to claim 2, characterized in that: The PLC control system is also included, which is connected with the motor of the sintering machine and the reel motor.

4. The apparatus for reducing the oxygen content at start-up of a sintering machine according to claim 1, characterized in that: The igniter heat preservation cover is also included, which is arranged at the inlet end of the sintering machine and covers the outside of the igniter.

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