Powder type efficient hot blast stove

Abstract

The utility model relates to the technical field of hot blast stoves, in particular to a powder type efficient hot blast stove. The utility model provides a powder type efficient hot blast stove which comprises an outer wall which is formed by building bricks and plays a foundation supporting role, a fire-resistant layer which plays a fire-resistant role is additionally arranged in the outer wall, a heat preservation layer which has a heat preservation and heat insulation role is additionally arranged between the fire-resistant layer and the outer wall, and a material opening is formed in one end of the fire-resistant layer. The material opening is used for blowing in solid-gas mixed type fuel which can improve the combustion rate and can be fully combusted; due to the fact that the hot blast stove is provided with the fuel feed port, the combustion rate can be increased through the arrangement of the feed port, solid-gas mixed type fuel can be fully combusted, and the problems that in a coal-fired hot blast stove in the prior art, due to the fact that the ignition point of coal is high, the coal is difficult to ignite after entering the hot blast stove, and the combustion efficiency is low are solved. And toxic gas is easily generated due to insufficient combustion.

Description

Technical Field

[0001] The present application relates to the technical field of hot blast furnaces, and in particular to a powder-type high-efficiency hot blast furnace. Background Art

[0002] In the prior art, hot blast furnaces are used as heating equipment for smelting, and the most commonly used ones are coal-fired hot blast furnaces. However, since coal is a solid fuel, its ignition point is relatively high. After entering the hot blast furnace, it is not only difficult to ignite, but also easily produces toxic gases due to incomplete combustion. For this reason, the coal is usually preheated before combustion. However, the preheating operation not only increases energy consumption, but also slows down the fuel addition speed, making it difficult to ensure the heat supply of the hot blast furnace. Utility Model Content

[0003] The problem to be solved by the present application is that the existing coal-fired hot blast furnace is not only difficult to ignite after entering the hot blast furnace due to the high ignition point of coal, but also easily produces toxic gases due to incomplete combustion.

[0004] In order to solve the above technical problems, the present application provides a powder-type high-efficiency hot air furnace, including an outer wall built of bricks and serving as a foundation support, a refractory layer is added inside the outer wall for fire resistance, and an insulation layer with thermal insulation function is added between the refractory layer and the outer wall. A fuel port is provided at one end of the refractory layer, and the fuel port is used to inject a solid-gas mixed fuel that can both increase the combustion rate and enable full combustion.

[0005] Since the hot blast furnace of the present application is designed with a fuel port for fuel, the arrangement of the fuel port can not only increase the combustion rate, but also fully burn the solid-gas mixed fuel, thereby solving the problem of the coal-fired hot blast furnace in the prior art, in which the coal has a high ignition point, making it difficult to ignite after entering the hot blast furnace and easily producing toxic gases due to incomplete combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the embodiment.

[0007] Figure 2 for Figure 1 Schematic diagram of the structure at AA in the middle.

[0008] Figure 3 for Figure 1 Schematic diagram of the structure at BB in the middle.

[0009] In the figure: 1. Fuel port; 2. Channel steel; 3. Insulation layer; 4. Refractory layer; 5. External wall; 6. Air outlet; 7. Feed port; 8. Slag port. DETAILED DESCRIPTION

[0010] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Example

[0011] The present application relates to a powder-type high-efficiency hot air furnace, such as Figure 1-3 As shown, the hot blast furnace includes an outer wall 5 which is built of bricks and serves as a basic support. Since the hot blast furnace will generate a relatively high temperature during operation, in order to avoid high temperature damage to the outer wall 5, a refractory layer 4 is added inside the outer wall 5 for fire resistance. Since the temperature inside the hot blast furnace is relatively high, heat exchange will occur between the refractory layer 4 and the outer wall 5 and the external environment. In order to prevent the heat energy of the hot blast furnace from being lost due to heat exchange, an insulation layer 3 with heat insulation effect is added between the refractory layer 4 and the outer wall 5.

[0012] In order to achieve full combustion of the fuel, a solid-gas mixed fuel is selected as the fuel, in which the solid fuel is lignite powder and the gas fuel is natural gas, and the addition ratio between the two is 7:3.

[0013] A fuel port 1 for blowing in fuel is provided at one end of the refractory layer 4, and a feed port 7 for blowing in raw materials is provided at the other end of the refractory layer 4. Therefore, a slag port 8 for discharging waste slag is provided at the other end of the refractory layer 4.

[0014] An air inlet 6 for blowing air is provided on the upper part of the fireproof layer 4. In order to adjust the air volume, a butterfly valve is provided at the position of the air inlet 6.

[0015] In order to improve the bearing strength of the outer wall 5 , a channel steel 2 is additionally provided on the outside of the outer wall 5 for improving the connection strength.

[0016] In order to ensure the thermal insulation performance of the thermal insulation layer 3, the thickness of the thermal insulation layer 3 is not less than 100 mm.

[0017] When in use, the solid mixture is blown into the refractory layer 4 along the fuel port 1 as fuel and ignited. With the help of sufficient mixing between the lignite powder and the natural gas, the natural gas is ignited first, and then the lignite powder is ignited, which greatly improves the ignition speed of the fuel. The refractory layer 4 can effectively reduce the high-temperature erosion after the fuel is burned, and the insulation layer 3 effectively reduces the heat loss of the hot blast stove. The outer wall 5, with the assistance of the channel steel 2, greatly improves the overall strength of the hot blast stove.

[0018] It is to be understood that the present application is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope protected by the present application.

Claims

1. A powder type high efficiency hot air furnace, characterized in that: It includes an outer wall built of bricks that serves as a foundation support, a fire-resistant layer is added inside the outer wall for fire-resistant function, a thermal insulation layer with heat insulation function is added between the fire-resistant layer and the outer wall, and a feed port is provided at one end of the fire-resistant layer for blowing in a solid-gas mixed fuel that can both increase the combustion rate and enable full combustion.

2. A powder type high efficiency hot air furnace according to claim 1, characterized in that: A slag outlet for discharging waste slag is provided at the other end of the refractory layer.

3. A powder type high efficiency hot blast furnace according to claim 1, characterized in that: A tuyere for blowing in air is provided on the upper part of the refractory layer.

4. A powder type high efficiency hot blast furnace according to claim 1, characterized in that: A butterfly valve is added at the air outlet.

5. The powder type high efficiency hot air furnace according to claim 1, characterized in that: Channel steel is added to the outside of the exterior wall to increase the connection strength.

6. The powder type high efficiency hot blast furnace according to claim 1, characterized in that: The fuel is a solid-gas mixture, the solid fuel is lignite powder, and the gas fuel is natural gas.

7. The powder-type high-efficiency hot blast furnace according to claim 1, characterized in that: The addition ratio of lignite powder to natural gas is 7:

3.

8. The powder type high efficiency hot blast furnace according to claim 1, characterized in that: The thickness of the insulation layer shall not be less than 100mm.

Images