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Background

Blast furnace is an ironmaking equipment and the first step in steelmaking. Iron ore is smelted in a blast furnace to produce pig iron for various purposes or molten iron for steelmaking.

The blast furnace production process is the process of smelting iron ore into pig iron at high temperatures. Iron ore, coke, and slag-making flux (limestone) are loaded from the top of the furnace, and preheated air is blown in from the tuyere located at the bottom of the furnace along the furnace periphery. Under high temperature, the carbon in the coke (some blast furnaces also spray auxiliary fuels such as coal powder, heavy oil, and natural gas) and the oxygen in the blown air undergo combustion reactions, producing high temperature and reducing gases. These reducing gases heat the slowly descending charge during the rising process and reduce the iron oxides in the iron ore into metallic iron.

Blast furnace ironmaking is a relatively complex process. It is necessary for blast furnace operators to easily understand the temperature distribution in the entire furnace before and after charging, the direction of airflow, and the distribution of pipe leakage, material collapse, and material surface inclination, so as to operate charging scientifically and reasonably. At the same time, they can also observe the operating conditions of other equipment in the furnace, such as: chute, cross temperature measurement, probe, etc.

Therefore, timely acquisition of information inside the blast furnace during the smelting process helps blast furnace operators to better control the blast furnace, change from passive to active operation, avoid accidents, and enable the blast furnace to achieve the goals of safety, stable production, high output, low consumption and long life, thereby achieving good social benefits and huge economic benefits.

Product Description

HIRDA-BF blast furnace surface infrared thermal imaging online temperature detection and analysis system is a special equipment used to detect the temperature distribution of the surface in the blast furnace. The system consists of infrared thermal imaging core, high temperature resistant infrared thermal imaging lens, automatic retraction protection device, furnace installation kit, air filtration system and field equipment box, algorithm server and intelligent temperature measurement software.

The high-temperature resistant infrared thermal imaging lens is installed in a retractable metal protective cover. The high-temperature resistant infrared thermal imaging lens is directly extended into the furnace through the retractable device. The infrared thermal imaging core stays outside the furnace to realize continuous real-time monitoring of the working status of the furnace.

The protective cover is cooled by compressed cooling air to make the infrared lens work at a more suitable temperature; at the same time, the lens is purged to prevent the dust in the furnace from adhering to the lens protection window; the system has a built-in high-temperature protection circuit. Once the cooling gas or cooling water circulation is abnormal, the lens will be retracted to prevent damage by the high temperature in the furnace.

It has the characteristics of high temperature resistance, corrosion resistance and maintenance-free. It can display various complex working conditions inside the blast furnace in real time. When the camera probe purges compressed air normally, it is suitable for various positive pressure kilns.

Advantages

◆With all-weather passive infrared temperature measurement function, real-time display of the temperature distribution of the material surface in the furnace

◆Adopt self-developed temperature measurement and correction algorithm to achieve accurate temperature measurement

◆Fully sealed to ensure that blast furnace gas does not leak

◆Ultra-large viewing angle, diagonal viewing angle can reach 120°

◆Spiral air curtain design, no dust accumulation on the lens

◆Overall stainless steel material, corrosion and temperature resistance

◆Automatic exit protection device, exit fault indication

◆Pneumatic/electric transmission mechanism

◆High temperature resistant optical pinhole lens, with dust-proof high temperature lens

◆Automatic exit from the furnace in case of over-temperature, under-voltage, and power failure

◆Support onvif protocol, can be connected to mainstream NVR

◆Not dependent on the system platform, can directly log in to the ip on the web page to access images and configurations, can directly output alarm signals to PLC or alarm

Product technical indicators

Benefits brought