CN201121195Y - Wind gap dynamic pressure tester for blast furnace process - Google Patents

Abstract

The utility model relates to an auxiliary measuring device for iron-making blast furnaces, in particular to a dynamic pressure measuring device for tuyeres used in blast furnace smelting, which can solve the problem that the existing blast furnace cannot timely detect the pressure of each tuyeres around the circumference and discover the The air inlet duct is blocked and other problems. It includes a pressure guiding pipe threadedly connected with a short pipe of the blast furnace tuyere peephole mirror, a pressure measuring tube is arranged on the pressure guiding pipe, a control valve is arranged on the pressure measuring tube, and a pressure gauge is installed on the upper end of the pressure measuring tube. The utility model installs a pressure measuring device at the peephole mirror of the tuyere of the blast furnace to measure the pressure of the tuyere regularly, detect and deal with the blockage of the air inlet pipes of each tuyere in time, and ensure the uniformity and stability of the air inlet pressure of each tuyere around the blast furnace circumference, thereby It ensures the stability and uniformity of the initial gas flow in the tuyere swirl area, and promotes the long-term stable and smooth progress of the furnace condition. The utility model has certain popularization value and use value.

Description

Dynamic pressure measuring device for tuyeres used in blast furnace smelting

technical field

The utility model relates to an auxiliary measuring device for ironmaking blast furnaces, in particular to a dynamic pressure measuring device for tuyeres for blast furnace smelting.

Background technique

During the blast furnace smelting process, the uniform and stable air pressure of each tuyere around the blast furnace is the premise and guarantee of a reasonable blast furnace air supply system. The air supply system directly affects the shape and size of the tuyere swirl area, and then affects the distribution of gas flow and temperature gradient in the furnace, as well as the uniform activity of the hearth. During the smelting process of the blast furnace, blockage of goosenecks and air inlet elbows in the air inlet device occurs from time to time due to reasons such as brick lining in the air supply pipe, slag filling in the tuyere, and backflow shutdown, etc., which will affect The uniformity and stability of the air intake to the circumference of the blast furnace will affect the smooth flow of the furnace condition, resulting in the reduction of production technical indicators. Therefore, timely detection and treatment of the blockage of the air inlet pipes of each tuyere, and ensuring the uniform and stable air inlet pressure of each tuyere around the blast furnace circle are important prerequisites for ensuring a stable and uniform initial gas flow in the tuyere swirl area, promoting uniform and active hearth work, and stable furnace conditions. However, no wind pressure measuring device has been installed in the blast furnace smelting process at present, so the pressure of each tuyere around the blast furnace circumference cannot be detected.

Contents of the invention

The utility model provides a tuyere for blast furnace smelting in order to solve the problem that no air pressure measuring device is installed in the existing blast furnace smelting, so that the air inlet pressure of each tuyere around the blast furnace circle cannot be detected in time, and to deal with the problem of blockage of the air inlet pipe of the tuyere in time. Dynamic pressure measuring device.

The utility model is realized by adopting the following technical scheme: a dynamic pressure measuring device for tuyeres used in blast furnace smelting, including a pressure guiding tube which is threadedly connected with a short pipe of the blast furnace tuyere peephole mirror, and a pressure measuring tube connected with it is arranged on the pressure guiding tube. A control valve is set on the pressure tube, and a pressure gauge is installed on the upper end of the pressure tube. The utility model learns from the principle of pressure transmission of the hydraulic pipe network system, and selects the peephole mirror at the tuyere before the blast enters the blast furnace for pressure measurement. The pressure guiding pipe is connected with the short pipe of the tuyere peephole mirror through threads, and then the blast pressure at this place is detected by the pressure gauge on the pressure measuring pipe. By repeating the above operations, the blast pressure of each tuyere around the blast furnace is detected, and the detected wind pressure value is compared with the value monitored at the hot blast main pipe, and it is judged whether there is blockage or blast in the pipeline according to the difference. In the case of obstruction, the blast furnace will be shut down in a planned manner, so that the blast furnace condition will soon return to stability and run smoothly, and avoid the impact of large fluctuations in the furnace condition on production.

In order to facilitate operation, a rotating handle is provided at one end of the pressure guiding tube, which can quickly realize the installation and disassembly of the pressure measuring device and the tuyere of the blast furnace.

Compared with the prior art, the utility model installs a pressure measuring device at the peephole mirror of the tuyere of the blast furnace to measure the pressure of the tuyere regularly, and can accurately calculate the blowing kinetic energy of each tuyere, and detect and deal with the air inlet ducts of each tuyere in time To ensure the uniform and stable air inlet pressure of each tuyere around the blast furnace, make the formulation and adjustment of the blast furnace air supply system more reasonable and accurate, and combine the adjustment of the charging system to make the blast furnace obtain a more reasonable gas flow, and Higher smelting economic and technical indicators. In a word, the utility model is simple in structure, low in cost, easy to manufacture, and has certain promotion value and use value.

Description of drawings

Fig. 1 is the structural representation of the utility model

In the figure: 1-pressure guiding tube 2-pressure measuring tube 3-control valve 4-pressure gauge 5-rotary handle

Detailed ways

The dynamic pressure measuring device for tuyeres used in blast furnace smelting includes a pressure guiding tube 1 which is threadedly connected with a short pipe of the blast furnace tuyere peephole mirror. One end of the pressure guiding tube 1 is provided with a rotating handle 5, and the pressure guiding tube 1 is provided with a pressure measuring tube communicating with it. 2. A control valve 3 is set on the pressure measuring tube 2, and a pressure gauge 4 is installed on the upper end of the pressure measuring tube 2. During installation, each installation connection port is required to be able to withstand the highest air pressure during normal production of the blast furnace without air leakage.

During specific implementation, the tuyere peephole mirror device is pulled to the blind plate position, the tuyere peephole mirror nut is unloaded, and one end of the pressure guiding tube of the present utility model is connected with the bolt of the tuyere peephole mirror short tube; then the tuyere peephole Push the mirror device to the normal working position, open the control valve on the pressure measuring tube, record the value measured by the pressure gauge, and then close the control valve; pull the tuyere peephole mirror to the position of the blind plate again, and remove the guide by rotating the handle. Press the tube, install the tuyere peephole mirror nut, and restore the tuyere peephole mirror to the normal working position, where the tuyere pressure measurement is completed. Follow the above steps to measure the pressure of the next tuyere until all the pressures of all the tuyere around the blast furnace are measured.

Finally, sort out, analyze and judge the data: compare and analyze all the measured data, and compare them with the wind pressure values continuously measured by the hot air main pipe, and re-measure the air outlets with abnormally low pressure (re-measure the pressure) The air supply pressure during the first pressure measurement should be the same as the air supply pressure during the first pressure measurement), if the measured pressure is still abnormally low, it means that there is a blockage at the short air inlet pipe or gooseneck of the tuyere, and finally There is a plan to stop wind treatment.

Claims (2)

1, a kind of blast-furnace smelting air port dynamic pressure measurement device, it is characterized in that comprising the connecting pipe (1) that is threaded with blast-furnace tuyere peephole mirror short tube, connecting pipe (1) is provided with the piezometric tube (2) that communicates with it, by-pass valve control (3) is set on the piezometric tube (2), and tensimeter (4) is equipped with in piezometric tube (2) upper end.

2, blast-furnace smelting according to claim 1 is characterized in that with air port dynamic pressure measurement device described connecting pipe (1) one end is provided with rotary handle (5).

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