Fuel gas blowing device and fuel gas blowing method thereof

Abstract

The invention discloses a fuel gas blowing device. The device comprises a sintering machine trolley, a blowing cover and a fuel gas blowing device body. The fuel gas blowing device body comprises a fuel gas blowing main pipe, a fuel gas blowing branch pipe and a fuel gas blowing pipe bank. The sintering machine trolley is located in the blowing cover. The fuel gas blowing main pipe is arranged atthe outer side of the blowing cover. The fuel gas blowing pipe bank is arranged above the sintering machine trolley, and located in the blowing cover. One end of the fuel gas blowing branch pipe is connected with the fuel gas blowing main pipe and the other end of the fuel gas blowing branch pipe is connected with the fuel gas blowing pipe bank. The device further comprises a nitrogen pipeline arranged at one side of the fuel gas blowing main pipe, wherein the nitrogen pipeline is connected with the fuel gas blowing main pipe through a connection pipe. The fuel gas blowing device disclosed bythe invention is capable of accurately judging whether fire is caught in the blowing cover or not, and timely and rapidly eliminating the fire condition.

Description

technical field [0001] The invention relates to a gas injection device for a sintering machine and a gas injection method thereof, in particular to a gas injection device and a method for rapid detection and self-adaptive processing of fire in a blowing hood, and belongs to the field of sintering. Background technique [0002] The sintering process is a key link in the ironmaking process. Its principle is to mix various powdery iron-containing raw materials with an appropriate amount of fuel and flux, add an appropriate amount of water, mix and pelletize the material on the sintering equipment to make the material A series of physical and chemical changes, sintered into blocks, which are sent to the blast furnace for the next step. [0003] In order to reduce the coke ratio and smelting cost of blast furnace ironmaking, blast furnaces often require high strength and high reducibility for sinter. In the sintering process, the sintered ore is generally required to have high s...

AI Technical Summary

Problems solved by technology

[0006] In gas injection production, the gas sprayed above the material surface may catch fire due to poor air permeability of the material layer, high temperature of the material surface, and large cracks on the material surface. It is impossible to quickly detect the gas fire that may occur at any time during production, and it is also impossible to make adaptive control of the fire, so there will be the following problems:

[0007] 1. Serious waste of energy: When the gas burns on the material surface, once it cannot be quickly detected and controlled, the flame will consume a large amount of gas, and at the same time, the gas cannot normally enter the material layer to participate in the auxiliary sintering process, which will cause fuel resources in production. A lot of waste, under the general trend of the country's "energy saving and emission reduction" has become a strategic direction, such energy waste is not allowed;

[0008] 2. The life of the equipment is shortened: when the combustion of gas on the material surface is not detected and controlled and burns for a long time, the injection pipe row is easy to deform and bend under the long-term baking of the flame, thus losing the production and operation ability, which leads to the shortening of the life of the injection device , the operating rate becomes lower, so that the operating cost of the device is greatly increased, and the economy is reduced;

[0009] 3. There are potential safety hazards: under the existing technology, when the operator finds that the gas in the hood is on fire, he needs to remotely close the gas main pipe valve in the central control room, and then go to the site to manually open the nitrogen valve to purge the gas in the gas main pipe; There is a certain time difference between the closing of the gas valve and the opening of the nitrogen valve, and this time difference can even be as long as 20 to 30 minutes when the on-site personnel are in short supply; this will cause the flame to burn along the gas flow to the gas pipe to form a backfire after the gas is cut off , resulting in the existence of safety hazards such as explosions

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