Open-circuit industrial water cooling system

Abstract

The invention provides an open-circuit industrial water cooling system, and relates to the technical field of ferrous metallurgy. The inner wall of a blast furnace body is covered with a cooling wall, a plurality of cooling water channels are arranged in the cooling wall and are arranged at intervals in the circumferential direction of the furnace body, each cooling water channel extends upwards from the bottom of the cooling wall to a furnace throat of the furnace body, the bottom end of each cooling water channel is provided with a cooling water inlet, and the top end of each cooling water channel is provided with a cooling water outlet. The open-circuit industrial water cooling system provided by the invention can achieve the purposes of uniform cooling, low operation cost and benefit for prolonging the service life of a blast furnace.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to an open circuit industrial water cooling system. Background technique [0002] During the blast furnace smelting process, complex physical and chemical reactions will take place in the furnace, resulting in high temperature; for this reason, the blast furnace needs cooling water to cool the furnace body to ensure the normal production of the blast furnace. At present, most domestic small and medium-sized blast furnaces are cooled by open-circuit industrial water. Cooling staves through cooling water are installed in the furnace body to cool the furnace body. The staves are in the form of serpentine tubes. The wall return water is discharged into the drainage tank, and then joins the return water main to flow into the pump room. [0003] This traditional structure has the following disadvantages: First, the stave adopts the form of a serpentine tube. Since the c...

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Problems solved by technology

[0003] This traditional structure has the following disadvantages: First, the stave adopts the form of a serpentine tube. Since the cooling water pipe has many turns, there is a cooling blind area in the stave, and the different spacing of the bent water pipes will cause the cooling of the stave itself to be uneven.

Secondly, the staves adopt the form of horizontal series connection. Due to the different vertical heat flow intensity of the blast furnace, the temperature rise of cooling water in each part is also different; the heat flow intensity in the hearth area of ​​the furnace bottom is relatively low, and the water temperature rise is low. However, The latent heat of the cooling water is discharged back to the pump room without being fully utilized, which consumes a lot of energy; moreover, the inlet water temperature of each stave in horizontal series is different, which causes the cooling intensity of each stave to be different, thus making the circumferential cooling of the blast furnace uneven

Thirdly, the cooling stave is in the form of serpentine tubes, and each stave has only one water pipe. Once the cooling stave water pipe leaks, the entire cooling stave will fail, which will become a hidden danger in production safety.

In addition, the staves adopt the form of horizontal series, the total cooling water volume of the furnace body is large, and the operating cost is high

Moreover, the paths and resistance losses of each water supply and return branch are different, resulting in different cooling water volumes in each branch, and uneven cooling in the circumferential direction of the furnace body, thus affecting the operation of the blast furnace

Finally, the cooling wall is in the form of a serpentine tube, and the cooling water flow is up and down. Once the temperature of the hot surface of the cooling wall reaches the condition of film boiling during production, air bubbles will be generated in the water system, and the air bubbles will easily gather at the elbow of the serpentine tube. It cannot be discharged, which will affect the cooling effect of the furnace body

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