Hot air ignition structure of sintering machine

Abstract

The utility model belongs to the technical field of combustion-supporting equipment, and particularly discloses a hot air ignition structure of a sintering machine, which comprises a hot air return pipeline, an air inducing pipeline is connected onto the hot air return pipeline, an inlet gate valve is mounted at the other end of the air inducing pipeline, and an induced draft fan is mounted on one side of the inlet gate valve. An air outlet of the induced draft fan is connected with an igniter; the upper air inducing pipeline is installed in the hot air returning pipeline, hot air is filtered and dedusted through the multi-pipe dust remover by the air inducing pipeline, the hot air is introduced into the igniter for combustion supporting through the inlet electric brake by utilizing power provided by the induced draft fan, and the device is simple in structure, low in manufacturing cost and high in practicability. A hot air return pipeline of waste heat of the circular cooler is connected with a hot air inducing pipeline and induced air, and hot air on the circular cooler is directly provided for combustion-supporting gas of an igniter, so that waste heat generated after sinter is cooled is effectively utilized, and fuel consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to combustion-supporting equipment technical field, concretely relates to a sintering machine hot air ignition structure. BACKGROUND

[0002] The sintering machine ignition furnace is the key equipment in the sintering process, its main function is to provide the necessary heat for the sintering mixture, make the fuel in it burn, and thus start the sintering process, the sintering machine ignition furnace is usually located at the front end of the sintering belt, the solid fuel in the sintering mixture is ignited by burning gas, the high-temperature flame generated by the ignition furnace directly or indirectly heats the sintering mixture, so that the fuel reaches the ignition point, in order to improve the combustion efficiency and reduce the emission, with the development of technology, the operation of the ignition furnace is more and more automated, the combustion parameters are monitored and adjusted in real time through the computer control system, so as to ensure the best combustion efficiency and product quality, the design and operation of the sintering machine ignition furnace need to consider multiple factors such as combustion efficiency, heat transfer, environmental impact and economic benefit, so as to realize efficient and environmentally-friendly sintering production.

[0003] The development trend of the sintering machine ignition furnace mainly focuses on the low hearth design and the improvement of the ignition burner type. The low hearth is beneficial to the direct injection of the flame to the ignition layer material surface, improves the ignition efficiency and reduces the fuel consumption, the improvement of the ignition burner type, such as the curtain type flame burner, makes the ignition flame more uniform, and the material ignition is also more uniform, some ignition furnaces adopt oxygen-enriched combustion technology, that is, the proportion of oxygen in the combustion process is increased, so as to improve the combustion efficiency and reduce the generation of carbon monoxide, some ignition furnace systems also include a hot air combustion-supporting system, which improves the combustion efficiency by preheating air or oxygen. The research on the sintering ignition quality and the reduction of sintering carbon monoxide emission based on oxygen-enriched process strengthens the low-calorific-value coal gas sintering, realizes the reduction of the coal gas consumption of the ignition furnace, the reduction of the sintering solid fuel consumption, the improvement of the sinter output and the reduction of carbon monoxide emission, and simultaneously reduces the labor intensity through automatic control. The sintering machine ignition furnace technology field is developing towards low energy consumption, high efficiency, automation and environmental protection, especially in the oxygen-enriched combustion technology and low-calorific-value coal gas ignition technology, remarkable progress has been made.

[0004] The preheating furnace preheating coal gas and air technology has the disadvantages of high risk in application, high maintenance cost, etc. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a sintering machine hot air ignition structure, which is based on the principle of hot air combustion-supporting system, utilizes the waste heat of the ring cooler, selects the dust-free section of the heat recovery air pipe, and connects the hot air pipe and the induced draft fan, so as to directly provide the hot air on the ring cooler to the ignition device to support the combustion of the gas, effectively utilize the waste heat of the cooled sinter, and reduce the fuel consumption.

[0006] In order to achieve the above object, the technical scheme adopted by the utility model is:

[0007] A sintering machine hot air ignition structure, including the return air duct, the return air duct is connected with the air duct, the other end of the air duct is installed with the inlet gate valve, one side of the inlet gate valve is installed with the air duct fan, and the air outlet of the air duct fan is connected with the igniter.

[0008] Preferably, the air duct is provided with a multi-tube dust collector, and the inlet and outlet of the multi-tube dust collector are connected with the air duct through a 90° elbow and a spherical place reducer.

[0009] Preferably, the air duct is provided with a butterfly valve near the inlet gate valve.

[0010] The utility model has the advantages of:

[0011] The utility model discloses a return air duct is installed with the air duct, and the air duct filters and removes dust to the hot air through the multi-tube dust collector, and the hot air is passed into the igniter for combustion-supporting through the inlet electric brake and the power provided by the air duct fan, which is simple in structure and low in manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] In the drawing: 1. air duct, 2. 90 elbow, 3. spherical place reducer, 4. multi-tube dust collector, 5. butterfly valve, 6. inlet gate valve, 7. air duct fan, 8. return air duct. DETAILED DESCRIPTION

[0014] The utility model will be further described in connection with the drawings and specific embodiments:

[0015] Figure 1The sintering machine hot air ignition structure shown, including the regenerative air duct 8, the regenerative air duct 8 is connected with the air duct 1, the other end of the air duct 1 is installed with the inlet gate valve 6, the inlet gate valve 6 is the louver butterfly valve, the core function is the fan starting, before the fan starting, the inlet gate valve 6 must be closed, the main function is to reduce the fan starting check, otherwise the fan cannot start, after starting, according to the production for hot air volume and air pressure requirements, adjust the opening of the inlet gate valve 6. The side of the inlet gate valve 6 is installed with the induced draft fan 7, the air outlet of the induced draft fan 7 is connected with the igniter. The air duct 1 is provided with the multi-tube dust collector 4, which functions to filter dust and protect equipment, the inlet and outlet of the multi-tube dust collector 4 are connected with the air duct 1 through the 90° elbow 2 and the spherical place reducing diameter 3. The air duct 1 is provided with the butterfly valve 5 near the inlet gate valve 6, the butterfly valve 5 is used for standby fan switching, and when the other set of equipment is running, the butterfly valve 5 is completely closed to prevent hot air backflow, and the butterfly valve 5 is a flap valve.

[0016] In use, first, the air duct 1 is welded on the regenerative air duct 8, then the multi-tube dust collector 4 is installed on the air duct 1, the air inlet of the multi-tube dust collector 4 is arranged at the bottom, the air outlet is arranged at the upper end, the air inlet and the air outlet of the multi-tube dust collector 4 are connected with the air duct 1 through the 90° elbow 2 and the spherical place reducing diameter 3, the inlet gate valve 6 is closed before the fan starts, after starting normally, the inlet gate valve 6 is gradually opened, the gate valve opening is adjusted according to the fan current to prevent the motor running current of the induced draft fan 7 from exceeding the rated value. After the sintering is in normal production, according to the flue gas temperature entering the air duct 1, the inlet gate valve 6 is continuously adjusted to the air volume and pressure of the combustion air required by the igniter.

Claims

1. A sintering machine hot air ignition structure comprising a return hot air duct, characterized by: The regenerative air pipe (8) is connected with an air duct (1), one end of the air duct (1) is provided with an inlet gate valve (6), one side of the inlet gate valve (6) is provided with an air duct fan (7), and the air outlet of the air duct fan (7) is connected with an igniter.

2. The hot air ignition structure of a sintering machine according to claim 1, characterized by: A multi-tube dust collector (4) is arranged on the air duct (1), and the inlet and the outlet of the multi-tube dust collector (4) are connected with the air duct (1) through a 90° elbow (2) and a spherical place reducing (3).

3. The hot air ignition structure of a sintering machine according to claim 1, characterized in that: A butterfly valve (5) is arranged on the air duct (1) close to the inlet gate valve (6).

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