Heat storage fire barrier for soot furnace

Abstract

A heat storage fire barrier for a soot furnace belongs to the technical field of blast furnace coal injection and comprises a wall body built by refractory materials, and a flue is reserved between the upper portion of the wall body and the inner wall of the top of the soot furnace. The counter-fire surface of the wall body is an uneven wall surface built by refractory materials, a plurality of reflecting columns made of the refractory materials are mounted on the counter-fire surface, and the reflecting columns are uniformly distributed on the counter-fire surface; and the fire blocking eave extends towards the air inlet on the counter-fire side of the upper part of the wall body to enable the flue gas to form reverse backflow. According to the heat storage fire barrier for the combustion effect of the soot furnace, the combustion effect, the combustion efficiency, the energy utilization efficiency and the environmental protection performance of the soot furnace are remarkably improved by implementing a specific building method and structural improvement.

Description

Technical Field

[0001] The utility model belongs to the technical field of blast furnace coal injection, in particular to a heat storage fire blocking wall for a coal smoke furnace. Background Art

[0002] Blast furnace coal injection technology is an important part of the modern metallurgical industry. It uses the heat of the coal smoke furnace to dry the coal powder, and transports the coal powder to the tuyere of the blast furnace through a special pipeline system, and then sprays it into the blast furnace through a special spray gun. In this process, the coal powder burns rapidly under high temperature, releasing a large amount of heat energy, which plays a key role in the combustion of the blast furnace smelting process.

[0003] In the design of traditional coal smoke stoves, the fire retaining wall is mainly built of refractory materials, and its surface is relatively flat. With such a design, when the flame of the coal gas flow hits the wall, the flame often directly passes over the fire retaining wall and enters the flue, resulting in the combustion process being completed in a short time, and the combustion effect is not ideal. Since the residence time of coal powder in the combustion chamber is too short, its combustion efficiency, heat energy release efficiency and the treatment effect of combustion products are all affected to a certain extent. In addition, the fire retaining wall itself needs to resist the impact and scouring of coal gas flow. The service life of the refractory layer on the surface of the existing flat fire retaining wall is relatively low, and the general maintenance cycle is about 1 year.

[0004] In order to improve the combustion effect of coal smoke stove, the key is how to prolong the residence time of coal gas flame in the combustion chamber so that it can burn more fully and completely. This can not only improve the thermal energy utilization rate of coal powder and reduce energy waste, but also reduce the harmful substances produced during the combustion process and reduce environmental pollution.

[0005] Based on the above considerations, it is necessary to design a new type of coal smoke furnace combustion structure, especially a fire baffle with heat storage function, which can reflect the coal gas flow flame, so that the flame forms multiple reflections and swirls in the combustion chamber, thereby significantly extending the residence time of the coal gas flow flame in the combustion chamber. This design can not only improve the combustion efficiency of the coal smoke furnace, but also improve its environmental performance, which is of great significance to the sustainable development of the modern metallurgical industry.

[0006] In summary, developing a heat storage fire barrier wall that can reflect smoke and achieve the combustion effect of a soot furnace is one of the important directions of current metallurgical industry technology development. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a heat storage fire blocking wall for a coal soot stove which can reflect smoke and thus achieve a full combustion effect of the coal soot stove.

[0008] The utility model is implemented as follows: a heat storage fire barrier wall for a coal smoke stove comprises a wall body built of refractory materials, a flue is reserved between the upper part of the wall body and the inner wall of the top of the coal smoke stove; the characteristic is that: the fire-facing surface of the wall body is an uneven wall surface built of refractory materials, a plurality of reflection columns made of refractory materials are installed on the fire-facing surface, and the plurality of reflection columns are evenly distributed on the fire-facing surface; a fire barrier eaves is extended on the side of the upper fire-facing surface of the wall body toward the air inlet to form a reverse reflux of smoke.

[0009] Preferably, the wall is arranged at 1 / 3 of the blast furnace gas inlet of the soot furnace, and its height is 2 / 3 of the inner chamber height of the soot furnace.

[0010] Preferably, the vertical wall length of the reflective column is 12-17 cm.

[0011] Preferably, a supporting device is provided between the bottom of the back-fire side wall and the bottom of the soot stove.

[0012] Preferably, a pre-embedded component connected to the wall is pre-embedded in the fire-blocking eaves.

[0013] The utility model has the advantages and technical effects: the heat storage fire retaining wall designed for the combustion effect of the coal soot stove by the utility model significantly improves the combustion effect, combustion efficiency, energy utilization efficiency and environmental protection performance of the coal soot stove by implementing a specific masonry method and structural improvement, and at the same time prolongs the life of the fire retaining wall, and the maintenance cycle can be extended to 2-3 years, providing strong technical support for the sustainable development of the modern metallurgical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] In the figure, 1. Wall; 1-1. Fire-facing surface; 2. Reserved flue; 3. Reflection column; 4. Fire-blocking eaves; 4-1. Embedded components; 5. Support device. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0017] See also Figure 1A heat storage fire barrier wall for a coal smoke stove comprises a wall body 1 built of refractory materials, a flue 2 is reserved between the upper part of the wall body and the inner wall of the top of the coal smoke stove; a fire-facing surface 1-1 of the wall body is an uneven wall surface built of refractory materials, and a plurality of reflection columns 3 made of refractory materials are installed on the fire-facing surface, and the plurality of reflection columns are evenly distributed on the fire-facing surface; a fire barrier eave 4 is extended on the side of the upper fire-facing surface of the wall body toward the air inlet to form a reverse reflux of smoke.

[0018] Preferably, the wall is arranged at 1 / 3 of the blast furnace gas inlet of the soot furnace, and its height is 2 / 3 of the inner chamber height of the soot furnace.

[0019] Preferably, the vertical wall length of the reflective column is 12-17 cm, and is 15 cm in this embodiment.

[0020] Preferably, a supporting device 5 is provided between the bottom of the back-to-fire side wall and the bottom of the soot stove. The supporting device is made of refractory bricks to improve the stability of the wall.

[0021] Preferably, the fire-proof eaves are pre-buried with embedded components connected to the wall, and the embedded components are fire-resistant steel bars to improve the strength of the fire-proof eaves.

[0022] The heat storage fireproof wall designed by the utility model for the combustion effect of coal smoke stoves has achieved significant technical effect improvement through the implementation of specific masonry methods and structural improvements. Specifically, the technical effects mainly include the following aspects:

[0023] Enhanced combustion effect: By setting a rough surface on one side of the fire retaining wall and applying refractory cement, the contact area and contact time between the gas flow flame and the wall are effectively increased. This design allows the gas flow flame to reflect and swirl on the rough surface, thereby significantly extending the flame's residence time in the combustion chamber, allowing the coal powder to burn more fully and completely, and the temperature at the flue outlet side is significantly increased by 3~5℃ compared to the existing wall.

[0024] Improve combustion efficiency: Through the fire-blocking eaves set on the top, the smoke forms an inward reflection shape when it is discharged, similar to the shape of a tidal wave, which is conducive to more thorough combustion in the upper layer. At the same time, the distributed airflow flow pattern design of the reflector column makes the coal flow flame impact the reflector column to form a distributed airflow, which increases the contact opportunity between coal powder and oxygen and makes the combustion more complete.

[0025] Optimize energy utilization: The high temperature of the reflective column allows the impurities in the gas to be melted and adsorbed at high temperature, which not only helps to reduce the emission of harmful substances, but also improves the efficiency of energy utilization. The reflective column also plays the role of storing energy and guiding airflow, so that the fire wall itself forms more abundant heat radiation, further improving the combustion effect.

[0026] Enhanced environmental performance: Due to the impact of the gas flow flame on the reflector column and the formation of distributed multi-configuration, micro-particle impurities are adsorbed and blocked by moisture, making the combustion more thorough. This helps reduce the harmful substances generated during the combustion process and reduces pollution to the environment.

[0027] Enhance the wall's energy storage and heat storage capacity: The integrated design of the reflective column and the fire-blocking wall not only enhances the structural stability of the wall, but also facilitates the wall's energy storage and heat storage. This design enables the wall to better absorb and store heat energy under the impact of the gas flow and flame, thereby improving the wall's thermal utilization efficiency.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat storage fireproof wall for a coal smoke stove, comprising a wall body built of refractory materials, wherein a flue is reserved between the upper part of the wall body and the inner wall of the top of the coal smoke stove; the characteristics are: The fire-facing surface of the wall is an uneven wall built with refractory materials, on which are installed several reflection columns made of refractory materials, which are evenly distributed on the fire-facing surface; a fire-blocking eaves extends on the upper side of the wall toward the air inlet to form a reverse reflux of smoke.

2. The heat storage fire barrier for a coal smoke stove according to claim 1, characterized in that: The wall is arranged at 1 / 3 of the coal soot furnace blast furnace gas inlet, and its height is 2 / 3 of the inner chamber height of the coal soot furnace.

3. The heat storage fire barrier for a coal smoke stove according to claim 1, characterized in that: The length of the reflective column is 12-17 cm.

4. The heat storage fire barrier for a coal smoke stove according to claim 1, characterized in that: A supporting device is arranged between the bottom of the back-fire side wall and the bottom of the coal smoke stove.

5. The heat storage fire barrier for a coal smoke stove according to claim 1, characterized in that: The fire-blocking eaves are pre-buried with pre-buried components connected to the wall.

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