Igniter for sintering machine

Abstract

The utility model relates to an igniter for a sintering machine, which is applied to the technical field of sintering production, solves the problems that the edge effect is easy to generate on the edge of the existing sintering pallet, and the productivity of the sintering machine and the quality of sintered ore are restricted. An ignition assembly I and an ignition assembly II are sequentially arranged on the upper end face of the furnace body in the running direction of the sintering pallet, the ignition assembly I comprises at least two edge ignition nozzles, and the two edge ignition nozzles are oppositely arranged on the two sides of the furnace body in the transverse direction. The two edge ignition nozzles are used for igniting sintering materials laid on the edges of the two transverse sides of the sintering pallet, the ignition assembly II comprises a plurality of first ignition nozzles, the first ignition nozzles are distributed on the furnace body in at least one row, and the ignition assembly further comprises a gas source assembly for supplying gas to the edge ignition nozzles and the first ignition nozzles; the method has the effects of increasing the thickness of a combustion layer, inhibiting the edge effect, improving the ignition strength of a mixture at the edge of the sintering pallet and effectively reducing the return rate of sintered ore.

Description

Technical Field

[0001] This utility model is applied in the field of sintering production technology, and in particular relates to an igniter for sintering machines. Background Technology

[0002] Sintering is the first and most important process before blast furnace smelting, and its main purpose is to provide high-quality sinter that meets the quality standards required by the blast furnace. The sintering process mainly includes batching, mixing, sintering, cooling, and screening. Among these processes, there is a piece of equipment called an igniter, which is mainly used to ignite the pulverized coal evenly distributed in the mixture in the sintering machine trolley, and then sinter the ore under the action of the main exhaust fan.

[0003] Traditional igniters feature a 2- or 3-row burner design, resulting in uniform ignition of the mixture surface and a combustion layer of approximately 30-50mm. During sintering, the edges of the sintering machine trolley are prone to edge effects due to the greater air permeability on the sides compared to the center, which restricts the sintering machine's capacity and the quality of the sintered ore. Utility Model Content

[0004] The purpose of this invention is to provide an igniter for sintering machines, which solves the problem that existing sintering trolleys are prone to edge effects, restricting the production capacity and quality of sintered ore.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides an igniter for a sintering machine, including a furnace body. Ignition component I and ignition component II are sequentially arranged on the upper surface of the furnace body along the direction of travel of the sintering trolley. Ignition component I includes at least two edge ignition nozzles, which are arranged opposite each other on both sides of the furnace body in the transverse direction. The two edge ignition nozzles are used to ignite the sintering material laid on the transverse edges of the sintering trolley. Ignition component II includes a plurality of first ignition nozzles, which are arranged in at least one row on the furnace body. It also includes a gas source component that supplies gas to the edge ignition nozzles and the first ignition nozzles respectively.

[0007] Furthermore, the gas source assembly includes a mixed gas inlet pipe and a gas pipe and a combustion-supporting pipe connected to the mixed gas inlet pipe. Both the gas pipe and the combustion-supporting pipe are equipped with flow regulating valves. The outlet end of the mixed gas inlet pipe is connected to the inlet of the edge igniter / first igniter.

[0008] Furthermore, the nozzles of the two edge ignition nozzles are arranged in a trumpet shape.

[0009] Furthermore, both edge igniters are inclined towards the centerline between them, and the inclination angle of the edge igniters is consistent with the inclination angle of the sintering trolley sidewall.

[0010] Furthermore, the furnace body includes a top plate and a support plate vertically arranged on both sides of the top plate, and the inner surfaces of both the top plate and the support plate are provided with a heat insulation layer.

[0011] Furthermore, a flow sensor is installed on the mixing intake pipe.

[0012] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0013] This utility model provides an igniter for a sintering machine. During operation, the sintering trolley is ignited by sequentially arranged edge igniters and a first igniter. During the ignition process, the edge of the sintering trolley has a longer ignition time than the middle area. The longer the ignition time, the thicker the ignition thickness, thus increasing the thickness of the combustion layer on both sides of the sintering trolley. The thicker the combustion layer, the worse the air permeability, reducing the edge ventilation rate. This diverts some of the main exhaust volume to the middle of the trolley, promoting a consistent thickness of the red layer across the cross-section and ensuring complete combustion. This helps to suppress the edge effect, improves the ignition intensity of the mixture at the edge of the sintering trolley, and effectively reduces the return rate of sintered ore. Attached Figure Description

[0014] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure in a preferred embodiment of the present invention;

[0016] Figure 2 This is a cross-sectional view of the overall mechanism in a preferred embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the weight detection component in a preferred embodiment of the present invention.

[0018] The reference numerals in the attached figures are explained as follows:

[0019] 1. Furnace body; 11. Top plate; 12. Support plate;

[0020] 2. Insulation layer;

[0021] 3. Edge igniter;

[0022] 4. First ignition nozzle;

[0023] 5. Gas source components; 51. Mixed gas intake; 52. Gas pipe; 53. Combustion-supporting pipe;

[0024] 6. Sintering trolley;

[0025] 7. Flow regulating valve;

[0026] 8. Flow sensor. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] refer to Figure 1 , Figure 2 and Figure 3 The igniter for a sintering machine provided in this embodiment includes a furnace body 1. The furnace body 1 includes a top plate 11 and a support plate 12 vertically arranged on both sides of the top plate 11. The inner surfaces of the top plate 11 and the support plate 12 are provided with a heat insulation layer 2. With this structure of the furnace body 1 and the heat insulation layer 2 on the inner surface of the furnace body 1, the igniter can play a heat preservation role when it is working, ensuring that the temperature change inside the furnace body 1 is small when multiple sintering trolleys 6 enter the furnace body 1 respectively, thereby improving the subsequent sintering quality.

[0031] Ignition assembly I and ignition assembly II are sequentially arranged on the upper surface of furnace body 1 along the direction of travel of sintering trolley 6 (indicated by arrows in the figure). Ignition assembly I 3 includes at least two edge ignition nozzles 3, which are arranged opposite each other on both sides of the furnace body 1 in the transverse direction. The two edge ignition nozzles 3 are used to ignite the sintering material laid on the transverse edges of the sintering trolley 6. Ignition assembly II includes multiple first ignition nozzles 4, which are arranged in at least one row on the furnace body 1. In this invention, the multiple first ignition nozzles 4 are arranged in two rows on the top plate 11 of the furnace body 1. It also includes a gas source assembly 5 that supplies gas to the edge ignition nozzles 3 and the first ignition nozzles 4 respectively.

[0032] refer to Figure 1 , Figure 2 and Figure 3 When the sintering trolley 6, filled with materials, enters the furnace body 1, the edges of the sintering trolley 6 are ignited first by two edge igniters 3. Then, the sintering trolley 6 is ignited sequentially by two rows of first igniters 4. During the ignition process, the edges of the sintering trolley 6 have a longer ignition time compared to the central area. The longer the ignition time, the thicker the ignition layer, thus increasing the thickness of the combustion layer on both sides of the sintering trolley 6. The thicker the combustion layer, the worse the permeability, reducing the edge ventilation rate and diverting some of the main exhaust air to the center of the trolley, promoting a consistent thickness of the red layer across the cross-section and ensuring complete combustion. The principle behind the poor permeability is that the mixed materials inside the sintering trolley 6 form a liquid phase during combustion. The liquid state has the worst permeability; the thicker the combustion layer and the higher the temperature, the more liquid phase is generated, which acts as a windbreak.

[0033] refer to Figure 1 , Figure 2 and Figure 3 The gas source assembly 5 includes a mixed gas inlet pipe 51 and a gas pipe 52 and a combustion-supporting pipe 53 connected to the mixed gas inlet pipe 51. Both the gas pipe 52 and the combustion-supporting pipe 53 are equipped with flow regulating valves 7. The outlet of the mixed gas inlet pipe 51 is connected to the inlet of the edge igniter 3 / first igniter 4. The flow rate of the gas and the flow rate of the combustion-supporting air can be controlled by the flow regulating valves 7 according to the actual working conditions, thereby controlling the flame size of the edge igniter 3 or the first igniter 4. A flow sensor 8 is installed on the mixed gas inlet pipe 51 to detect the flow rate within the mixed gas inlet pipe 51, thereby detecting any abnormalities within the mixed gas inlet pipe 51, such as a sudden increase or decrease in the mixed gas flow rate. This facilitates timely inspection and maintenance by on-site personnel, preventing production accidents.

[0034] refer to Figure 1 , Figure 2 and Figure 3The two edge ignition nozzles 3 have flared nozzles arranged in a funnel shape. Both edge ignition nozzles 3 are inclined towards the centerline between them, and the inclination angle of the edge ignition nozzles 3 is consistent with the inclination angle of the side wall of the sintering trolley 6. The funnel shape increases the contact area between the fire source and the sintering material, and the inclination of the edge ignition nozzles 3 allows ignition and combustion to be directed towards the inclination direction of the sintering material at the edge of the sintering trolley 6, resulting in better ignition effect.

[0035] In summary, the igniter with this structure not only meets the basic ignition requirements of the sintering mixture, but also increases the thickness of the sintering material combustion layer at the edge of the sintering trolley 6 and suppresses the edge effect by adding the edge igniter nozzle 3. It also improves the ignition intensity of the mixture at the edge of the sintering trolley 6, which can effectively reduce the return rate of sintered ore.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. An igniter for a sintering machine, comprising a furnace body (1), characterized in that, Ignition assembly I and ignition assembly II are sequentially arranged on the upper surface of the furnace body (1) along the direction of the sintering trolley. Ignition assembly I includes at least two edge ignition nozzles (3). The two edge ignition nozzles (3) are arranged opposite each other on both sides of the furnace body (1) in the lateral direction. The two edge ignition nozzles (3) are used to ignite the sintering material laid on the lateral edges of the sintering trolley. Ignition assembly II includes a plurality of first ignition nozzles (4). The plurality of first ignition nozzles (4) are distributed in at least one row on the furnace body (1). It also includes a gas source assembly (5) that supplies gas to the edge ignition nozzles (3) and the first ignition nozzles (4) respectively.

2. The igniter for a sintering machine according to claim 1, characterized in that, The gas source assembly (5) includes a mixed gas inlet pipe (51) and a gas pipe (52) and a combustion-supporting pipe (53) connected to the mixed gas inlet pipe (51). Both the gas pipe (52) and the combustion-supporting pipe (53) are equipped with flow regulating valves (7). The outlet end of the mixed gas inlet pipe (51) is connected to the inlet of the edge igniter (3) / the first igniter (4).

3. The igniter for a sintering machine according to claim 1 or 2, characterized in that, The nozzles of the two edge ignition nozzles (3) are arranged in a trumpet shape.

4. The igniter for a sintering machine according to claim 3, characterized in that, Both edge ignition nozzles (3) are inclined toward the centerline between them, and the inclination angle of the edge ignition nozzles (3) is consistent with the inclination angle of the side wall of the sintering trolley.

5. The igniter for a sintering machine according to claim 1 or 4, characterized in that, The furnace body (1) includes a top plate (11) and a support plate (12) vertically arranged on both sides of the top plate (11). The inner surfaces of the top plate (11) and the support plate (12) are provided with a heat insulation layer (2).

6. The igniter for a sintering machine according to claim 2, characterized in that, A flow sensor (8) is installed on the gas mixture inlet pipe (51).

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