Steel ladle baking combustion-supporting device

Abstract

The utility model relates to the technical field of steel-making auxiliary equipment, in particular to a steel ladle baking combustion-supporting device, which not only can reduce the use of oxygen and save the production cost, but also can reuse heat for many times and improve the energy utilization rate. Comprising a ladle; the device further comprises a heat exchange mechanism, a gas conveying mechanism and a combustion-supporting mechanism, the heat exchange mechanism is installed on the steel ladle and preheats the steel ladle, the gas conveying mechanism is installed on the heat exchange mechanism and reduces use of oxygen, and the combustion-supporting mechanism is installed on the gas conveying mechanism and conveys the oxygen and air into the steel ladle after the oxygen and the air are mixed.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking auxiliary equipment, in particular to a ladle baking combustion-supporting device. Background Art

[0002] The steel ladle of a steel mill must be fully baked before use to ensure that the refractory material in the ladle reaches the specified high-temperature strength and that the air bricks at the bottom of the ladle reach a sufficient temperature to avoid failure of the air bricks due to cold steel during use.

[0003] The existing ladle baking combustion-supporting device, for example, the ladle bottom baking combustion-supporting device disclosed in the utility model patent with application number 201020236888.6, has a main structure including a top plate, an oxygen blowing pipe, a header, an oxygen pipe and a base. At least two oxygen blowing pipes are connected to the upper end of the hollow header. The upper ends of the oxygen blowing pipes are provided with a top plate, and the top plate is connected to the steel outlet at the bottom of the ladle. An oxygen pipe with a stop valve is installed on one side of the header, and an adjustable base is provided at the bottom. When in use, the device is connected to the steel outlet, and the oxygen pipe is connected to the outside, and the stop valve on the oxygen pipe can be opened to the specified flow rate, and then the baking cover on the top of the ladle is ignited to bake the ladle. After the baking is completed, the oxygen is turned off and the combustion-supporting device is removed.

[0004] However, most of the existing ladle baking combustion-supporting devices use oxygen to support combustion. The price of pure oxygen is relatively high, which increases the production cost. In addition, a large amount of flue gas is generated after the ladle is baked, and the flue gas is not fully utilized, wasting a lot of heat. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a ladle baking combustion-supporting device which can not only reduce the use of oxygen and save production costs, but also reuse heat for multiple times and improve energy utilization.

[0006] The utility model discloses a ladle baking combustion-supporting device, comprising a ladle; further comprising a heat exchange mechanism, a gas transmission mechanism and a combustion-supporting mechanism, wherein the heat exchange mechanism is installed on the ladle and preheats the ladle, the gas transmission mechanism is installed on the heat exchange mechanism and reduces the use of oxygen, and the combustion-supporting mechanism is installed on the gas transmission mechanism and mixes oxygen and air and then transmits them into the ladle; the ladle heats and bakes the inside of the ladle, and the smoke generated by the baking enters the heat exchange mechanism to preheat the outside of the ladle, thereby reducing heat loss and improving energy utilization, and the gas transmission mechanism is started, and the air transmitted by the gas transmission mechanism is preheated by the heat exchange mechanism, and the preheated air then enters the ladle and the combustion-supporting mechanism, and the combustion-supporting mechanism mixes pure oxygen and air, thereby reducing the consumption of pure oxygen while supporting combustion and reducing production costs, and the preheated air in the gas transmission mechanism is transmitted to the ladle to blow the gas disturbance in the ladle, thereby enhancing the heating effect in the ladle.

[0007] Preferably, the ladle comprises a ladle body, four groups of pillars, a drain pipe, a hinge, a ladle cover, a gas transmission pipeline, an ignition device and a nozzle, a cavity is arranged inside the ladle body, and an inlet is opened at the top of the ladle body, the top of the four groups of pillars are connected to the bottom end of the ladle body, the top of the drain pipe is connected to the bottom end of the ladle body, the hinge is installed at the inlet of the ladle body, the ladle cover is installed on the hinge, the gas transmission pipeline is connected to the inside of the gas pipeline, the ignition device is installed on the ladle cover and connected to the inside of the gas transmission pipeline, and the nozzle is installed on the ladle cover; before the ladle is used, the gas transmission pipeline transports the gas to the ignition device, the gas and the combustion-supporting gas are mixed in the ignition device and ignited, and then the flame is sprayed through the nozzle to heat and bake the cavity of the ladle body, to ensure that the air-permeable brick part at the bottom of the ladle reaches a sufficient temperature, so as to avoid the air-permeable brick failing due to cold steel during use, and the feeding and discharging of molten steel are facilitated by arranging the hinge, the ladle cover and the drain pipe.

[0008] Preferably, the heat exchange mechanism includes an exhaust pipe, a gas supply hose, a heat exchange coil and an insulation layer. The exhaust pipe is installed on the ladle cover and is connected to the interior of the cavity of the ladle body. The gas supply hose is connected to the interior of the exhaust pipe. The heat exchange coil is sleeved on the outside of the ladle body and is connected to the interior of the gas supply hose. An inner cavity is provided inside the insulation layer, and the bottom end of the inner cavity of the insulation layer is connected to the bottom ends of four groups of pillars. The flue gas generated after the nozzle burns enters the heat exchange coil through the exhaust pipe and the gas supply hose. The heat exchange coil heats the outer wall of the ladle body to accelerate the heating of the ladle body and make it heated more evenly. The heat loss of the heat exchange coil is prevented by providing an insulation layer, thereby improving energy utilization.

[0009] Preferably, the gas delivery mechanism includes an air pump, an air inlet pipe, an air delivery pipe 1, a connecting hose, an air delivery pipe 2, a check valve and an air delivery pipe 3. The air pump is installed on the insulation layer, the air inlet pipe is installed on the air pump, the air delivery pipe 1 is installed on the air pump and is located in the interlayer between the insulation layer and the ladle body, the connecting hose is connected to the inside of the air delivery pipe 1, the air delivery pipe 2 is connected to the inside of the connecting hose, the check valve is installed on the air delivery pipe 2, the air delivery pipe 3 is connected to the inside of the connecting hose, and the nozzle is installed on the ladle cover and connected to the inside of the air delivery pipe 3. Start the air pump, the air pump draws in outside air through the air inlet pipe, and then passes through the air delivery pipe 1 And the connecting hose is transported to the gas pipe two and the gas pipe three, the heat exchange coil heats the gas pipe one to increase the air temperature in the gas pipe one. When the temperature of the combustion air increases, the air density will decrease, which means that the amount of oxygen contained in the unit volume of air will increase. The combustion air is transported to the combustion-supporting mechanism through the gas pipe two as needed and mixed with oxygen to reduce the oxygen usage. At the same time, the combustion air is transported to the nozzle through the gas pipe three, and the nozzle sprays air into the cavity of the ladle body, so that the airflow in the cavity of the ladle body is disturbed, the cavity inside the ladle body is heated more evenly, and the heating rate is improved.

[0010] Preferably, the nozzle is a self-rotating high-pressure refractory nozzle; the gas is transported to the nozzle through a gas pipe, the airflow drives the nozzle to rotate, and the nozzle sprays the airflow into the cavity of the ladle body, disrupting the airflow inside the ladle body, so that the inner wall of the cavity of the ladle body is heated evenly, and the nozzle is refractory, which can extend the service life of the device.

[0011] Preferably, the combustion-supporting mechanism includes a gas storage box, an oxygen delivery pipe, a metering valve, a motor, a rotating shaft and three groups of baffles. The gas storage box is installed on the ladle cover, a chamber is arranged inside the gas storage box and is connected to the inside of the ignition device, the oxygen delivery pipe is installed on the gas storage box and is connected to the inside of the chamber of the gas storage box, the metering valve is installed on the oxygen delivery pipe, the bottom end of the motor is connected to the top end of the gas storage box, the rotating shaft is rotatably installed in the chamber of the gas storage box, and the three groups of baffles are all installed on the rotating shaft; the opening degree of the metering valve is adjusted according to the flow rate of combustion-supporting air delivered to the chamber of the gas storage box by the gas delivery pipe 2, the oxygen delivery pipe delivers a certain amount of pure oxygen to the chamber of the gas storage box, the motor is started, the motor drives the rotating shaft to rotate, and the rotating shaft drives the three groups of baffles to rotate to mix the combustion-supporting air and pure oxygen, and then deliver them to the high ignition device, thereby reducing the oxygen consumption.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the ladle heats and bakes the inside of the ladle, and the smoke generated by the baking enters the heat exchange mechanism to preheat the outside of the ladle, thereby reducing heat loss and improving energy utilization. The gas supply mechanism is started, and the air supplied by the gas supply mechanism is preheated by the heat exchange mechanism, and the preheated air then enters the ladle and the combustion-supporting mechanism, and the combustion-supporting mechanism mixes pure oxygen and air, thereby reducing the consumption of pure oxygen while supporting combustion and reducing production costs. The preheated air in the gas supply mechanism is supplied to the ladle to blow the gas disturbance in the ladle, thereby enhancing the heating effect in the ladle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0014] Figure 2 It is a left-side cross-sectional structural schematic diagram of the ladle, heat exchange mechanism and gas transmission mechanism of the utility model;

[0015] Figure 3 It is a schematic diagram of the structure of the ladle viewed from above of the utility model;

[0016] Figure 4 It is a cross-sectional axonometric structural diagram of the gas transmission mechanism of the utility model;

[0017] Figure 5 It is a partially enlarged cross-sectional axonometric structural schematic diagram of the combustion-supporting mechanism of the utility model;

[0018] Figure 6It is a partially enlarged axonometric structural schematic diagram of the heat exchange mechanism and gas transmission mechanism of the utility model.

[0019] Markings in the attached drawings: 01, ladle; 11, ladle body; 12, support; 13, drain pipe; 14, hinge; 15, ladle cover; 16, gas transmission pipeline; 17, ignition device; 18, nozzle; 02, heat exchange mechanism; 21, exhaust pipe; 22, gas transmission hose; 23, heat exchange coil; 24, insulation layer; 03, gas transmission mechanism; 31, air pump; 32, air inlet pipe; 33, gas transmission pipe one; 34, connecting hose; 35, gas transmission pipe two; 36, check valve; 37, gas transmission pipe three; 38, nozzle; 04, combustion-supporting mechanism; 41, gas storage box; 42, oxygen transmission pipe; 43, metering valve; 44, motor; 45, rotating shaft; 46, baffle. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive. Example 1

[0021] The utility model discloses a ladle baking combustion-supporting device, comprising a ladle 01; a heat exchange mechanism 02, a gas transmission mechanism 03 and a combustion-supporting mechanism 04, wherein the heat exchange mechanism 02 is installed on the ladle 01 and preheats the ladle 01, the gas transmission mechanism 03 is installed on the heat exchange mechanism 02 and reduces the use of oxygen, and the combustion-supporting mechanism 04 is installed on the gas transmission mechanism 03 and mixes oxygen and air and transmits them into the ladle 01; the ladle 01 comprises a ladle body 11, four groups of pillars 12, a drain pipe 13, a hinge 14, a ladle cover 15, a gas transmission pipeline 16, an ignition device 17 and The ladle body 11 has a cavity inside, and an inlet is opened at the top of the ladle body 11. The top of the four groups of pillars 12 are connected to the bottom of the ladle body 11. The top of the drain pipe 13 is connected to the bottom of the ladle body 11. The hinge 14 is installed at the inlet of the ladle body 11. The ladle cover 15 is installed on the hinge 14. The gas pipeline 16 is connected to the inside of the gas pipeline. The ignition device 17 is installed on the ladle cover 15 and is connected to the inside of the gas pipeline 16. The nozzle 18 is installed on the ladle cover 15; the heat exchange mechanism 02 includes an exhaust pipe 2 1. A gas hose 22, a heat exchange coil 23 and an insulation layer 24. The exhaust pipe 21 is installed on the ladle cover 15 and communicated with the cavity of the ladle body 11. The gas hose 22 is communicated with the inside of the exhaust pipe 21. The heat exchange coil 23 is sleeved on the outside of the ladle body 11 and communicated with the inside of the gas hose 22. The insulation layer 24 is provided with an inner cavity. The bottom end of the inner cavity of the insulation layer 24 is connected to the bottom ends of the four groups of pillars 12. The gas delivery mechanism 03 includes an air pump 31, an air inlet pipe 32, a gas delivery pipe 1 33, a connecting hose 34, a gas delivery pipe 2 35, a check valve 36 and an air delivery pipe 37. The air pipe 37, the air pump 31 is installed on the insulation layer 24, the air inlet pipe 32 is installed on the air pump 31, the air pipe 1 33 is installed on the air pump 31 and is located in the interlayer between the insulation layer 24 and the ladle body 11, the connecting hose 34 is connected to the inside of the air pipe 1 33, the air pipe 2 35 is connected to the inside of the connecting hose 34, the check valve 36 is installed on the air pipe 2 35, the air pipe 3 37 is connected to the inside of the connecting hose 34, the nozzle 38 is installed on the ladle cover 15 and is connected to the inside of the air pipe 3 37; the nozzle 38 also includes a self-rotating high-pressure refractory nozzle;When it is working, first, before the ladle is used, the gas pipeline 16 conveys the gas to the ignition device 17, the gas and the combustion-supporting gas are mixed in the ignition device 17 and ignited, and then the flame is sprayed through the nozzle 18 to heat and bake the cavity of the ladle body 11, to ensure that the air-permeable bricks at the bottom of the ladle reach a sufficient temperature, so as to avoid the air-permeable bricks from failing due to the freezing of cold steel during use. The hinge 14, the ladle cover 15 and the drain pipe 13 are provided to facilitate the feeding and discharging of molten steel. The smoke generated by the combustion of the nozzle 18 enters the heat exchange coil 23 through the exhaust pipe 21 and the gas hose 22. The heat exchange coil 23 heats the outer wall of the ladle body 11, accelerates the heating of the ladle body 11, makes it more evenly heated, and prevents the heat loss of the heat exchange coil 23 by providing the insulation layer 24, thereby improving the energy utilization rate and starting the air. Pump 31, air pump 31 draws in outside air through air inlet pipe 32, and then delivers it to air pipe 2 35 and air pipe 3 37 through air pipe 1 33 and connecting hose 34. Heat exchange coil 23 heats air pipe 1 33 to increase the air temperature in air pipe 1 33. When the temperature of combustion air increases, the air density will decrease, which means that the amount of oxygen contained in a unit volume of air will increase. Combustion air is delivered to combustion support mechanism 04 through air pipe 2 35 as needed, mixed with oxygen, and the amount of oxygen used is reduced. At the same time, combustion air is delivered to nozzle 38 through air pipe 3 37. The airflow drives nozzle 38 to rotate. Nozzle 38 sprays the airflow into the cavity of ladle body 11, disrupting the airflow inside ladle body 11, so that the inner wall of the cavity of ladle body 11 is heated evenly. In addition, nozzle 38 is fire-resistant, which can extend the service life of the device. ; Example 2

[0022] like Figures 1 to 5As shown, a ladle baking combustion-supporting device of the utility model is based on Example 1; the combustion-supporting mechanism 04 includes a gas storage box 41, an oxygen delivery pipe 42, a metering valve 43, a motor 44, a rotating shaft 45 and three groups of baffles 46, the gas storage box 41 is installed on the ladle cover 15, the gas storage box 41 is provided with a chamber inside and is connected to the inside of the ignition device 17, the oxygen delivery pipe 42 is installed on the gas storage box 41 and is connected to the inside of the chamber of the gas storage box 41, the metering valve 43 is installed on the oxygen delivery pipe 42, the bottom end of the motor 44 is connected to the top end of the gas storage box 41, the rotating shaft 45 is rotatably installed in the chamber of the gas storage box 41, and the three groups of baffles 46 are all installed on the rotating shaft 45; when it is working, first Before the ladle is used, the gas transmission pipeline 16 transmits the gas to the ignition device 17, the gas and the combustion-supporting gas are mixed in the ignition device 17 and ignited, and then the flame is ejected through the nozzle 18 to heat and bake the cavity of the ladle body 11, ensuring that the air-permeable bricks at the bottom of the ladle reach a sufficient temperature to avoid the air-permeable bricks from failing due to the freezing of cold steel during use. The hinge 14, the ladle cover 15 and the drain pipe 13 are provided to facilitate the feeding and discharging of molten steel. The smoke generated by the combustion of the nozzle 18 enters the heat exchange coil 23 through the exhaust pipe 21 and the gas hose 22. The heat exchange coil 23 heats the outer wall of the ladle body 11, accelerates the heating of the ladle body 11, and makes it heat more The heat exchanger 23 is heated evenly, and the heat loss of the heat exchange coil 23 is prevented by setting a heat preservation layer 24, so as to improve the energy utilization rate. The air pump 31 is started, and the air pump 31 draws in the outside air through the air inlet pipe 32, and then transmits it to the air pipe 2 35 and the air pipe 3 37 through the air pipe 1 33 and the connecting hose 34. The heat exchanger coil 23 heats the air pipe 1 33 to increase the air temperature in the air pipe 1 33. When the temperature of the combustion-supporting air increases, the air density will decrease, which means that the amount of oxygen contained in the unit volume of air will increase. The combustion-supporting air is transmitted to the combustion-supporting mechanism 04 through the air pipe 2 35 as needed, mixed with oxygen, and the oxygen usage is reduced. At the same time, the combustion-supporting air is transmitted through the air pipe 3 37 The air is transported to the nozzle 38, and the airflow drives the nozzle 38 to rotate. The nozzle 38 sprays the airflow into the cavity of the ladle body 11, disrupting the airflow inside the ladle body 11, so that the inner wall of the cavity of the ladle body 11 is heated evenly, and the nozzle 38 is fire-resistant, which can extend the service life of the device. The opening degree of the metering valve 43 is adjusted according to the flow rate of the combustion air transported to the chamber of the gas storage box 41 by the gas supply pipe 2 35, and the oxygen delivery pipe 42 transports a certain amount of pure oxygen into the chamber of the gas storage box 41, and the motor 44 is started. The motor 44 drives the rotating shaft 45 to rotate, and the rotating shaft 45 drives the three groups of baffles 46 to rotate to mix the combustion air and pure oxygen, and then transport them to the high ignition device 17 to reduce the oxygen consumption.

[0023] The ignition device 17, air pump 31 and motor 44 of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manuals, without the need for technicians in the field to make creative efforts.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A ladle baking combustion-supporting device, comprising a ladle (01); characterized in that: The invention also comprises a heat exchange mechanism (02), a gas transmission mechanism (03) and a combustion-supporting mechanism (04). The heat exchange mechanism (02) is installed on the ladle (01) and preheats the ladle (01). The gas transmission mechanism (03) is installed on the heat exchange mechanism (02) and reduces the use of oxygen. The combustion-supporting mechanism (04) is installed on the gas transmission mechanism (03) and mixes oxygen and air and then transmits them into the ladle (01).

2. A ladle baking combustion-supporting device as claimed in claim 1, characterized in that: The ladle (01) comprises a ladle body (11), four groups of pillars (12), a drain pipe (13), a hinge (14), a ladle cover (15), a gas transmission pipeline (16), an ignition device (17) and a nozzle (18). A cavity is arranged inside the ladle body (11), and an inlet is opened at the top of the ladle body (11). The tops of the four groups of pillars (12) are connected to the bottom of the ladle body (11), the top of the drain pipe (13) is connected to the bottom of the ladle body (11), the hinge (14) is installed at the inlet of the ladle body (11), the ladle cover (15) is installed on the hinge (14), the gas transmission pipeline (16) is connected to the inside of the gas pipeline, the ignition device (17) is installed on the ladle cover (15) and is connected to the inside of the gas transmission pipeline (16), and the nozzle (18) is installed on the ladle cover (15).

3. A ladle baking combustion-supporting device as claimed in claim 2, characterized in that: The heat exchange mechanism (02) comprises an exhaust pipe (21), a gas supply hose (22), a heat exchange coil (23) and a thermal insulation layer (24); the exhaust pipe (21) is mounted on the ladle cover (15) and is connected to the interior of the cavity of the ladle body (11); the gas supply hose (22) is connected to the interior of the exhaust pipe (21); the heat exchange coil (23) is sleeved on the outside of the ladle body (11) and is connected to the interior of the gas supply hose (22); an inner cavity is arranged inside the thermal insulation layer (24); the bottom end of the inner cavity of the thermal insulation layer (24) is connected to the bottom ends of the four groups of pillars (12).

4. A ladle baking combustion-supporting device as claimed in claim 3, characterized in that: The gas delivery mechanism (03) comprises an air pump (31), an air inlet pipe (32), an air delivery pipe 1 (33), a connecting hose (34), an air delivery pipe 2 (35), a check valve (36) and an air delivery pipe 3 (37). The air pump (31) is mounted on the thermal insulation layer (24), the air inlet pipe (32) is mounted on the air pump (31), the air delivery pipe 1 (33) is mounted on the air pump (31) and is located in the interlayer between the thermal insulation layer (24) and the ladle body (11), the connecting hose (34) is connected to the interior of the air delivery pipe 1 (33), the air delivery pipe 2 (35) is connected to the interior of the connecting hose (34), the check valve (36) is mounted on the air delivery pipe 2 (35), the air delivery pipe 3 (37) is connected to the interior of the connecting hose (34), and the nozzle (38) is mounted on the ladle cover (15) and is connected to the interior of the air delivery pipe 3 (37).

5. A ladle baking combustion-supporting device as claimed in claim 4, characterized in that: The nozzle (38) is also a self-rotating high-pressure refractory nozzle.

6. A ladle baking combustion-supporting device as claimed in claim 2, characterized in that: The combustion-supporting mechanism (04) comprises a gas storage box (41), an oxygen delivery pipe (42), a metering valve (43), a motor (44), a rotating shaft (45) and three groups of baffles (46). The gas storage box (41) is mounted on the ladle cover (15). A chamber is arranged inside the gas storage box (41) and is communicated with the inside of the ignition device (17). The oxygen delivery pipe (42) is mounted on the gas storage box (41) and is communicated with the inside of the chamber of the gas storage box (41). The metering valve (43) is mounted on the oxygen delivery pipe (42). The bottom end of the motor (44) is connected to the top end of the gas storage box (41). The rotating shaft (45) is rotatably mounted in the chamber of the gas storage box (41). The three groups of baffles (46) are all mounted on the rotating shaft (45).

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