CN220636301U

CN220636301U - Ladle drying device

Info

Publication number: CN220636301U
Application number: CN202322300545.1U
Authority: CN
Inventors: 赵伟华; 朱振国; 何纪豪; 李伟华
Original assignee: Zhengzhou Jingwei Technology Industrial Co ltd
Current assignee: Zhengzhou Jingwei Technology Industrial Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-03-22
Anticipated expiration: 2033-08-25

Abstract

The utility model provides a ladle drying device, which comprises a power premixing burner and an air supply device; the air supply device is connected to the power premix burner and is used for providing fuel gas and oxygen or providing fuel gas and oxygen mixed gas for the power premix burner; the power premix burner is arranged in the open ladle and is used for baking an inner cavity of the open ladle in a mode that the flame height is 0-20 CM; the power premix burner is a premix type flameless combustion gas or an injection type flameless burner. The ladle drying device adopts a flameless burner with a burning speed faster than that of a diffusion burner, has more complete burning and shorter flame, belongs to power burning, has high burning temperature and greatly improves the heat efficiency, and the infrared rays radiated by the burner are about half of the total heat transfer quantity, and the wavelength of the infrared rays is mostly less than 10 microns, so the device can save fuel gas, shorten the ladle drying time and improve the drying efficiency.

Description

Ladle drying device

Technical Field

The utility model relates to the field of equipment for metal smelting, in particular to a ladle drying device.

Background

The ladle is an important device in the metal smelting industry and is used for storing high-temperature liquid metal liquid, the heat insulation layer on the inner wall of the ladle can be continuously adhered with the metal liquid and eroded in the use process, the heat insulation layer needs to be repaired after the ladle is used for a certain period, and the bottom and the inner wall of the ladle need to be dried after the ladle is repaired. At present, the ladle baking mode adopts modes such as electric energy, carbon blocks and the like for heating, and the problems of long baking time, high cost, uneven baking and the like exist.

The utility model patent with the authorized bulletin number of CN218532788U specifically discloses a fuel gas ladle heating device, which comprises a cover body and a combustion control device; the combustion control device comprises a combustion controller, an igniter in signal connection with the combustion controller, a burner support fixedly connected with the cover body and a burner fixedly connected with the burner support. The device takes fuel gas as a heat source and controls the combustion process through the arranged combustion control device, thereby reducing the drying cost and increasing the baking uniformity. However, the device still adopts a common gas burner, and has the problems of low baking heat transfer efficiency and uniformity to be further improved.

Disclosure of Invention

In order to accelerate the heat transfer efficiency and the heat transfer uniformity in the ladle baking process, the utility model adopts the following technical scheme: a ladle drying device comprises a power premixing burner and an air supply device;

the air supply device is connected to the power premix burner and is used for providing gas-oxygen mixture for the power premix burner or separately providing gas and oxygen; the power premix burner is arranged in the open ladle and is used for baking an inner cavity of the open ladle in a mode that the flame height is 0-20 CM;

the power premix burner is a premix type flameless burner or an injection type flameless burner.

Based on the above, the flame height of the power premix burner is 0 to 10CM.

Based on the above, the power premix burner is a premix type flameless burner, the air supply device comprises a gas supply pipeline, an oxygen supply pipeline, a mixed gas supply pipeline and a premixer, and the premixer is used for mixing the gas provided by the gas supply pipeline and the oxygen provided by the oxygen supply pipeline and then conveying the mixed gas to the premix type flameless burner through the mixed gas supply pipeline.

Specifically, the gas supply pipeline and the oxygen supply pipeline are respectively connected with the gas inlet of the premixer, and the gas outlet of the premixer is connected with the premixed flameless burner through the mixed gas transmission pipeline.

Based on the above, the power premixing burner is an injection type flameless burner, the air supply device comprises a fuel gas supply pipeline and an oxygen supply pipeline, and the injection type flameless burner is used for mixing fuel gas provided by the fuel gas supply pipeline as an injection medium and oxygen provided by the oxygen supply pipeline as an injected medium and igniting.

Based on the above, a plurality of power premix burners are arranged in the open ladle, and the power premix burners are communicated with the air supply device through the equalizing ring.

Based on the above, the sizes of the plurality of power premix burners are the same or different.

Based on the above, a plurality of the power premix burners are regularly arranged or irregularly arranged in an open ladle.

Based on the above, the equalizing ring is in an irregular pattern or a regular pattern such as a circle, a rectangle, a triangle, a diamond, etc.

Based on the above, a plurality of power premix burners form a virtual cylinder which is in fit with the shape of the inner wall of the open ladle.

Based on the above, the power premix burner is provided with a burner bracket, and the burner bracket is arranged at the top or bottom of the power premix burner.

Based on the above, the top of the power premix burner is further provided with a cover body, and the cover body is used for covering the top of the open ladle to form a relatively closed baking space.

The flameless burner has higher burning speed and more complete burning than the diffusion burner, and has high burning temperature and greatly raised heat efficiency. The burner radiates infrared rays about half of the total heat transfer, and most of the infrared rays have a wavelength of 10 μm or less, so that the burner has good heating characteristics. Flameless combustion because the gas and air are pre-mixed prior to entering the fuel burner, no mixing time is required during combustion, so the overall time of the combustion process is virtually dependent on the chemical reaction time; the air factor required for combustion of the fuel gas is very small, generally 1.05 to 1.15, even as low as 1.03 to 1.05, but the burnout degree is very high, and the chemical incomplete combustion loss is close to zero. The combustion mode has high combustion temperature, is close to the theoretical combustion temperature, has short and transparent combustion flame and no obvious outline, and can not even see flame under the background of a hot combustion tunnel, so the flameless combustion is called as flameless combustion, and belongs to power combustion.

There are two ways of achieving premixing for flameless combustion: one is to make the gas and air enter the mixer or the premixing device according to the combustion ratio, and then the gas and the air are conveyed to the burner through a pipeline after being evenly mixed. For premixed flameless combustion, the gas and air are premixed, so that the excess air coefficient can be smaller, generally 1.02 to 1.05, the volume heat intensity of the burner is much higher than that of flame Rao Gao due to the fast combustion speed, and the high temperature area is concentrated. Another industrial burner manufacturer uses an injector with fuel gas as the injection medium and air as the injected medium to achieve uniform mixing of the two through the injector. Such devices are known as jet flameless burners, or simply jet burners.

The gas infrared heating and drying principle is as follows: flameless burners are capable of radiating intense infrared radiation, corresponding to wavelengths of 2 μm to 4 μm. And infrared is invisible light and has certain penetrability. After being absorbed by the object, the infrared ray can be quickly converted into heat energy, so that the infrared ray has strong heating effect. After the heated object absorbs infrared rays, the molecules and atoms in the object are subjected to strong vibration and rotation, and the temperature of the object is increased by the vibration and rotation, so that the aim of rapid heating is fulfilled.

Compared with the prior art, the ladle drying device provided by the utility model has the substantial characteristics and improvements, in particular, the ladle drying device adopts the flameless burner, the combustion speed is faster than that of the diffusion burner, the combustion is more complete, the combustion speed is only dependent on the firing and combustion reaction rates, the combustion speed is faster than that of flame combustion, the flame is short, no obvious flame profile exists, the ladle drying device belongs to power combustion, the combustion temperature is high, the heat efficiency is greatly improved, the infrared rays radiated by the burner are about half of the total heat transmission quantity, and the wavelength is mostly less than 10 microns, so that the ladle drying device has good heating characteristics, thereby shortening the ladle drying time, improving the drying efficiency, reducing the fuel gas consumption and lowering the baking cost.

Drawings

Fig. 1 is a schematic structural view of a ladle drying device in a working state.

Fig. 2 is a schematic structural diagram of a ladle drying device provided in embodiment 1 of the present utility model.

Fig. 3 is a schematic structural diagram of a ladle drying device provided in embodiment 2 of the present utility model.

Fig. 4 is a schematic structural diagram of a ladle drying device provided in embodiment 3 of the present utility model.

Fig. 5 is a schematic structural diagram of a ladle drying device provided in embodiment 4 of the present utility model.

Fig. 6 is a schematic structural diagram of a ladle drying device provided in embodiment 5 of the present utility model.

In the figure: 1. ladle; 2. a mixed gas transmission pipeline; 3. a power premix burner; 4. a circular equalizing ring; 5. a premix flameless burner; 6. a burner support; 7. rectangular equalizing rings; 8. a cover body; 9. and an air supply device.

Detailed Description

The technical scheme of the utility model is further described in detail through the following specific embodiments.

Example 1

The embodiment provides a ladle drying device, as shown in fig. 1 and 2, comprising a power premix burner 3 and an air supply device 9.

The air supply device 9 is connected to the power premix burner 3 and is used for providing gas-oxygen mixture for the power premix burner. The power premix burner 3 is arranged in the open ladle 1 and is used for baking the inner cavity of the open ladle in a mode that the flame height is 0 to 20 CM.

In this embodiment, the power premix burner 3 is a premix flameless burner 5. The gas supply device comprises a gas supply pipeline, an oxygen supply pipeline, a mixed gas supply pipeline 2 and a premixer, wherein the premixer is used for mixing the gas supplied by the gas supply pipeline and the oxygen supplied by the oxygen supply pipeline and then conveying the mixed gas to the premixed flameless burner through the mixed gas supply pipeline.

In this embodiment, the combustion device comprises a plurality of premixed flameless burners 5. And a plurality of premixed flameless combustors 5 are communicated with the gas mixture inlet pipe through equalizing rings. For uniform heat transfer, a plurality of the premixed flameless burners 5 are arranged on the equalizing ring at equal intervals. A plurality of the premixed flameless burners 5 are vertically arranged on the equalizing ring.

In this embodiment, the equalizing ring is circular in shape, so as to form a circular equalizing ring 4. A plurality of premixed flameless combustors 5 form a virtual cylinder which is matched with the shape of the inner wall of the ladle.

Example 2

The present embodiment provides a ladle drying device, as shown in fig. 3, the specific structure differs from that of embodiment 1 in that: in this embodiment, the power premix burner 3 is provided with a burner support 6, and the burner support 6 is installed on two sides of the circular equalizing ring 4. In use, the two-piece ladle is lapped on the edge of the side wall at the top of the ladle 1.

Example 3

The present embodiment provides a ladle drying device, as shown in fig. 4, and the specific structure is different from that of embodiment 1 in that: in this embodiment, the equalizing ring is rectangular in shape, and a rectangular equalizing ring 7 is formed.

Example 4

The present embodiment provides a ladle drying device, as shown in fig. 5, and the specific structure is different from that of embodiment 3 in that: in this embodiment, for convenience of placement, the power premix burner is provided with a burner support 6. The burner support 6 is arranged on two sides of the rectangular equalizing ring 7. When in use, the two-way ladle is lapped on the edge of the side wall at the top of the ladle.

Example 5

The present embodiment provides a ladle drying device, as shown in fig. 6, and the specific structure is different from that of embodiment 1 in that: in this embodiment, in order to reduce heat loss, the power premix burner is further provided with a cover body 8, and the cover body 8 is used for covering the top of the ladle to form a relatively closed baking space.

Example 6

The embodiment provides a ladle drying device, and the specific structure is different from embodiment 1 in that: in this embodiment, the power premix burner is an injection type flameless burner, the air supply device includes a gas supply pipe and an oxygen supply pipe, and the injection type flameless burner is configured to mix gas provided by the gas supply pipe as an injection medium and oxygen provided by the oxygen supply pipe as an injected medium.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.

Claims

1. Ladle drying device, its characterized in that: comprises a power premixing burner and an air supply device;

the air supply device is connected to the power premix burner and is used for providing fuel gas and oxygen or providing fuel gas and oxygen mixed gas for the power premix burner; the power premix burner is arranged in the open ladle and is used for baking an inner cavity of the open ladle in a mode that the flame height is 0-20 CM;

2. The ladle drying apparatus as recited in claim 1 wherein: the flame height of the power premix burner is 0 to 10CM.

3. The ladle drying apparatus as recited in claim 1 wherein: the power premixing burner is a premixing flameless burner, the air supply device comprises a gas supply pipeline, an oxygen supply pipeline, a mixed gas supply pipeline and a premixing device, the gas supply pipeline and the oxygen supply pipeline are respectively connected with an air inlet of the premixing device, and an air outlet of the premixing device is connected with the premixing flameless burner through the mixed gas supply pipeline.

4. The ladle drying apparatus as recited in claim 1 wherein: the power premixing burner is an injection type flameless burner, the air supply device comprises a fuel gas supply pipeline and an oxygen supply pipeline, and the injection type flameless burner is used for mixing fuel gas serving as an injection medium and oxygen serving as an injected medium.

5. The ladle drying apparatus as claimed in claim 1 or 2 or 3 or 4, wherein: the air supply device is connected with a plurality of power premix burners through equalizing rings.

6. The ladle drying apparatus as recited in claim 5 wherein: the sizes of the power premix burners are the same or different.

7. The ladle drying apparatus as recited in claim 5 wherein: a plurality of the power premix burners are arranged regularly or irregularly.

8. The ladle drying apparatus as recited in claim 5 wherein: the equalizing ring is in an irregular pattern or a circular, rectangular, triangular or rhombic regular pattern.

9. The ladle drying apparatus as recited in claim 5 wherein: the power premix burners form a virtual cylinder which is matched with the shape of the inner wall of the open ladle.

10. The ladle drying apparatus as claimed in claim 1 or 2 or 3 or 4, wherein: the power premix burner is provided with a burner bracket, and the burner bracket is arranged at the top or bottom of the power premix burner.

11. The ladle drying apparatus as recited in claim 10 wherein: the top of the power premixing burner is also provided with a cover body which is used for covering the top of the open ladle to form a relatively closed baking space.