Preheater for sintering ignition furnace

Abstract

The utility model discloses a preheater for a sintering ignition furnace, which comprises a preheating chamber, the upper surface of the preheating chamber is fixedly connected with a burner, the inner surface of the preheating chamber is fixedly connected with a heat exchange tube bundle, the side surface of the preheating chamber is communicated with a fuel pipeline, the upper surface of the preheating chamber is communicated with a flue inlet channel, and the other end of the flue inlet channel is communicated with a flue outlet channel. The other end of the smoke outlet flue communicates with a sintering ignition furnace body, a filter box shell is fixedly connected to the side surface of the preheating chamber, a filter screen is fixedly connected to the inner surface of the filter box shell, a connecting frame is fixedly connected to the upper surface of the filter box shell, and a motor is fixedly connected to the side surface of the connecting frame. The output end of the motor is fixedly connected with fan blades, the side surface of the preheating chamber is communicated with an exhaust pipe, through the structure, gas to be treated can be preheated, and harmful substances in smoke can be filtered out.

Description

Technical Field

[0001] The utility model relates to the technical field of preheater devices, in particular to a preheater for a sintering ignition furnace. Background Art

[0002] The existing preheater for sintering ignition furnace is composed of a heat exchange tube bundle, but the heating of the heat exchange tube bundle during its use still consumes some energy. For example, a Chinese patent discloses a "preheating device for sintering ignition furnace", and its application number is "CN202121030834.9". In this device, a valve is fixedly installed in the middle of the fresh air duct, and an equal-diameter tee is fixedly welded to the bottom of the fresh air duct. Branch pipes are welded on both sides of the equal-diameter tee, and a preheater is fixedly installed in the middle of the two branch pipes. The interior of the two branch pipes is provided with a pipe inner wall, and the surface of the pipe inner wall is fixedly sleeved with an insulation board, and the surface of the insulation board An outer protective layer is fixedly sleeved, and the inner cavities of the two branch pipes are fixedly installed with multiple guide plates. The device heats the air inside the fresh air duct, uses an equal-diameter tee to divert the air, and then preheats the air through a preheater to fully mix the combustible gas and burn it completely, thereby increasing the combustion temperature and reducing fuel consumption. The insulation layer can effectively keep warm, and the outer protective layer can effectively protect the overall structure. The structure is simple and easy to use. However, during its use, the heating of the heat exchange tube bundle still requires some energy consumption and the heating of the fuel will produce harmful gases, which not only increases energy consumption but also pollutes the environment with harmful gases. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art, and provides a preheater for a sintering ignition furnace. Through a plurality of heat exchange tube bundles connected inside the preheating chamber, the low-temperature fuel flowing through the preheating chamber is subjected to countercurrent heat exchange. The heat exchange tube bundle transfers its heat to the low-temperature fuel, so that the fuel reaches a higher preheating temperature before entering the sintering ignition furnace, thereby improving the combustion efficiency and reducing the waste of energy. The heat of the flue gas in the tail flue of the sintering ignition furnace is used to heat the heat exchange tube bundle, thereby preheating the fuel entering the sintering ignition furnace, thereby reducing the energy consumption required for heating the heat exchange tube bundle, and effectively improving the thermal energy utilization rate. This can not only reduce energy consumption, but also reduce flue gas emissions, which is beneficial to environmental protection. Subsequently, the filter screen in the filter box can filter the outflowing flue gas, remove residual harmful substances in the flue gas, and filter particulate matter and impurities in the flue gas discharged from the preheating chamber, to ensure that the discharged flue gas meets environmental protection requirements.

[0004] The utility model also provides a preheater for a sintering ignition furnace as described above, comprising: a preheating chamber, a burner fixedly connected to the upper surface of the preheating chamber, a heat exchange tube bundle fixedly connected to the inner surface of the preheating chamber, a fuel pipeline connected to the side surface of the preheating chamber, a smoke inlet connected to the upper surface of the preheating chamber, a smoke outlet connected to the other end of the smoke inlet, and a sintering ignition furnace body connected to the other end of the smoke outlet, a filter box shell fixedly connected to the side surface of the preheating chamber, a filter screen fixedly connected to the inner surface of the filter box shell, a connecting frame fixedly connected to the upper surface of the filter box shell, a motor fixedly connected to the side surface of the connecting frame, a fan blade fixedly connected to the output end of the motor, an exhaust pipe connected to the side surface of the preheating chamber, and the exhaust pipe is located inside the filter box shell. Through the above components, the smoke or air to be treated can be preheated and harmful substances in the smoke can be filtered out to ensure that the discharged smoke meets environmental protection standards.

[0005] According to the preheater for a sintering ignition furnace described in the utility model, the upper surface of the preheating chamber is fixedly connected with a base, and the upper surface of the base is fixedly connected with a lifting ring, and the above components are convenient for installation and maintenance of the preheating furnace.

[0006] According to the preheater for a sintering ignition furnace described in the utility model, a handrail is fixedly connected to the side surface of the preheating chamber, and a protective cover is fixedly connected to the outer surface of the handrail. Through the above components, it is convenient to move the preheating furnace and protect both hands.

[0007] According to the preheater for a sintering ignition furnace described in the utility model, a thermometer is fixedly connected to the side surface of the preheating chamber, and the temperature in the preheating furnace can be monitored conveniently through the above components.

[0008] According to the preheater for a sintering ignition furnace described in the utility model, a support is fixedly connected to the lower surface of the preheating chamber, and a connecting plate is fixedly connected to the lower surface of the support. The above components are convenient for supporting the preheating furnace and installing the rotating wheel.

[0009] According to the preheater for a sintering ignition furnace described in the utility model, the side surface of the connecting plate is rotatably connected to a rotating wheel, and the outer surface of the rotating wheel is fixedly connected to an anti-skid pad. The above components facilitate the movement of the preheating furnace and prevent sliding.

[0010] According to the preheater for a sintering ignition furnace described in the utility model, a lamp holder is fixedly connected to the side surface of the preheating chamber, and a fill light is fixedly connected to the side surface of the lamp holder. Through the above components, the environment around the preheating furnace can be filled with light.

[0011] Beneficial Effects

[0012] 1. Compared with the prior art, the preheater for the sintering ignition furnace performs countercurrent heat exchange on the low-temperature fuel flowing through the preheating chamber through multiple groups of heat exchange tube bundles connected inside the preheating chamber. The heat exchange tube bundles transfer their heat to the low-temperature fuel, so that the fuel reaches a higher preheating temperature before entering the sintering ignition furnace, thereby improving the combustion efficiency and reducing energy waste.

[0013] 2. Compared with the prior art, the preheater for the sintering ignition furnace utilizes the heat of the flue gas in the tail flue of the sintering ignition furnace to heat the heat exchange tube bundle, thereby preheating the fuel entering the sintering ignition furnace, thereby reducing the energy consumption required for heating the heat exchange tube bundle and effectively improving the thermal energy utilization rate. This can not only reduce energy consumption, but also reduce flue gas emissions, which is beneficial to environmental protection. Subsequently, the filter in the filter box can filter the outflowing flue gas to remove residual harmful substances in the flue gas, and filter the particulate matter and impurities in the flue gas discharged from the preheating chamber to ensure that the discharged flue gas meets environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 This is a main structural diagram of a preheater for a sintering ignition furnace of the utility model;

[0016] Figure 2 This is a left-side structural diagram of a preheater for a sintering ignition furnace of the utility model;

[0017] Figure 3 The cross-sectional structure of the preheater for the sintering ignition furnace of the utility model Figure 1 ;

[0018] Figure 4 The cross-sectional structure of the preheater for the sintering ignition furnace of the utility model Figure 2 ;

[0019] Legend:

[0020] 1. Sintering ignition furnace body; 2. Smoke outlet; 3. Smoke inlet; 4. Burner; 5. Base; 6. Lifting ring; 7. Fuel pipeline; 8. Filter box shell; 9. Preheating chamber; 10. Support; 11. Handrail; 12. Protective cover; 13. Thermometer; 14. Connecting frame; 15. Motor; 16. Fan blade; 17. Connecting plate; 18. Rotor; 19. Anti-slip mat; 20. Heat exchange tube bundle; 21. Exhaust pipe; 22. Filter; 23. Lamp holder; 24. Fill light. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0022] Reference Figure 1-4 The utility model embodiment is a preheater for a sintering ignition furnace, which includes: a preheating chamber 9 for heating the flue gas or air to be treated, a burner 4 fixedly connected to the upper surface of the preheating chamber 9 for providing heat to the preheating chamber 9, a heat exchange tube bundle 20 fixedly connected to the inner surface of the preheating chamber 9 for transferring the heat generated by the burner 4 to the medium to be preheated, a fuel pipeline 7 connected to the side surface of the preheating chamber 9 for supplying fuel to the burner 4, a flue gas inlet 3 connected to the upper surface of the preheating chamber 9 for introducing the flue gas or air to be preheated into the preheating chamber 9, the other end of the flue gas inlet 3 is connected to a flue gas outlet 2 for introducing the hot gas discharged from the sintering electric furnace body 1, the other end of the flue gas outlet 2 is connected to the sintering ignition furnace body 1, and the sintering ignition furnace is an existing It is a mature technology and will not be described in detail in this document. A filter box shell 8 is fixedly connected to the side surface of the preheating chamber 9, and a filter screen 22 is fixedly connected to the inner surface of the filter box shell 8, which is used to filter particulate matter and impurities in the flue gas discharged from the preheating chamber 9 to ensure that the discharged flue gas meets environmental protection requirements. A connecting frame 14 is fixedly connected to the upper surface of the filter box shell 8, and a motor 15 is fixedly connected to the side surface of the connecting frame 14. A fan blade 16 is fixedly connected to the output end of the motor 15. The rotation of the fan blade 16 generates airflow, which helps the flue gas to be filtered through the filter screen 22 and accelerates the discharge of the filtered flue gas. The side surface of the preheating chamber 9 is connected to an exhaust pipe 21, and the exhaust pipe 21 is located inside the filter box shell 8 to guide the exhausted flue gas to be discharged from the preheating chamber 9 and enter the filter box.

[0023] A base 5 is fixedly connected to the upper surface of the preheating chamber 9, a lifting ring 6 is fixedly connected to the upper surface of the base 5 for installing and moving the preheating chamber 9, a handrail 11 is fixedly connected to the side surface of the preheating chamber 9 for pushing the device, a protective cover 12 is fixedly connected to the outer surface of the handrail 11, a thermometer 13 is fixedly connected to the side surface of the preheating chamber 9 for detecting the internal temperature of the preheating chamber 9, a pillar 10 is fixedly connected to the lower surface of the preheating chamber 9 for supporting the device, a connecting plate 17 is fixedly connected to the lower surface of the pillar 10 for facilitating the installation of a rotating wheel 18, a rotating wheel 18 is rotatably connected to the side surface of the connecting plate 17, an anti-slip pad 19 is fixedly connected to the outer surface of the rotating wheel 18, a lamp holder 23 is fixedly connected to the side surface of the preheating chamber 9, a fill light 24 is fixedly connected to the side surface of the lamp holder 23 for facilitating lighting near the preheating chamber 9.

[0024] Working principle: A plurality of heat exchange tube bundles 20 are arranged inside the preheating chamber 9. When the high-temperature flue gas in the tail flue of the sintering ignition furnace body 1 enters through the flue inlet 3 of the preheating chamber 9, the high-temperature flue gas will be in countercurrent contact with the low-temperature fuel flowing through the preheating chamber from the fuel pipeline 7. In the countercurrent heat exchange process, the high-temperature flue gas transfers its heat to the low-temperature coal gas, so that the coal gas reaches a higher preheating temperature before entering the sintering ignition furnace, and then provides heat to the sintering ignition furnace through the burner 4. After the heat transfer is completed, the flue gas enters the filter box through the exhaust pipe 21 and is discharged after being filtered.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A preheater for a sintering ignition furnace, characterized in that: include: A preheating chamber (9), wherein a burner (4) is fixedly connected to the upper surface of the preheating chamber (9), a heat exchange tube bundle (20) is fixedly connected to the inner surface of the preheating chamber (9), a fuel pipeline (7) is connected to the side surface of the preheating chamber (9), a smoke inlet (3) is connected to the upper surface of the preheating chamber (9), the other end of the smoke inlet (3) is connected to the smoke outlet (2), the other end of the smoke outlet (2) is connected to the sintering ignition furnace body (1), and the side surface of the preheating chamber (9) is fixedly connected to the upper surface of the preheating chamber (9). A filter box housing (8) is fixedly connected thereto, a filter screen (22) is fixedly connected to the inner surface of the filter box housing (8), a connecting frame (14) is fixedly connected to the upper surface of the filter box housing (8), a motor (15) is fixedly connected to the side surface of the connecting frame (14), a fan blade (16) is fixedly connected to the output end of the motor (15), and an exhaust pipe (21) is connected to the side surface of the preheating chamber (9), and the exhaust pipe (21) is located inside the filter box housing (8).

2. A preheater for a sintering ignition furnace according to claim 1, characterized in that: The upper surface of the preheating chamber (9) is fixedly connected to a base (5), and the upper surface of the base (5) is fixedly connected to a lifting ring (6).

3. A preheater for a sintering ignition furnace according to claim 1, characterized in that: A handrail (11) is fixedly connected to the side surface of the preheating chamber (9), and a protective cover (12) is fixedly connected to the outer surface of the handrail (11).

4. A preheater for a sintering ignition furnace according to claim 1, characterized in that: A thermometer (13) is fixedly connected to the side surface of the preheating chamber (9).

5. The preheater for a sintering ignition furnace according to claim 1, characterized in that: The lower surface of the preheating chamber (9) is fixedly connected to a support (10), and the lower surface of the support (10) is fixedly connected to a connecting plate (17).

6. A preheater for a sintering ignition furnace according to claim 5, characterized in that: The side surface of the connecting plate (17) is rotatably connected to a rotating wheel (18), and the outer surface of the rotating wheel (18) is fixedly connected to an anti-slip pad (19).

7. A preheater for a sintering ignition furnace according to claim 1, characterized in that: A lamp holder (23) is fixedly connected to the side surface of the preheating chamber (9), and a fill light (24) is fixedly connected to the side surface of the lamp holder (23).

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