A cooling device for the bottom of a submerged arc furnace

Abstract

The present invention provides a furnace bottom cooling device for an electric arc furnace, including a furnace body, characterized in that the furnace bottom is formed by splicing a plurality of conductive copper tiles with cavities therein in sequence to form a conductive furnace bottom, each conductive copper tile is provided with a water inlet and a water outlet, the water inlet is connected to a tower-type equalizing water distributor through a water supply branch pipe, and the water outlet is connected to a cooler water inlet main pipe through a return water branch pipe. The arc furnace bottom of the electric arc furnace formed by a plurality of conductive copper tiles with cavities therein is connected to the conductive copper tile cavities through a water supply pipe, and the conductive copper tiles of the furnace bottom are efficiently water-cooled, and then the cooling water with a uniform flow rate and pressure is evenly delivered to the cavities of each conductive copper tile through the tower-type equalizing water distributor, thereby greatly improving the cooling effect and saving water resources, and the heated cooling water can be used for other purposes, making full use of the heat energy, and the cooled water can be returned for recycling, thereby greatly reducing the cooling cost and being green and environmentally friendly.

Description

Technical Field

[0001] The invention relates to a cooling device, in particular to a cooling device for the bottom of an electric arc furnace, and belongs to the technical field of design and manufacture of cooling systems. Background Art

[0002] At present, the bottom electrodes of DC furnaces mainly include conductive furnace bottom type, multi-contact pin type and steel column type. These electrodes are not only complex in structure, but also mostly cooled by air cooling. Although the air cooling method has a relatively simple structure, the cooling effect is poor. At the same time, air cooling has a high space requirement, and sufficient space is required to install large air cooling equipment, which is difficult to meet in ordinary small factories. In addition, the air cooling method cannot recycle waste heat, resulting in energy waste. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0003] In order to solve the problems that the bottom electrode of the existing DC electric furnace adopts air cooling, resulting in poor cooling effect and inability to recover waste heat, the present invention provides a cooling device for the bottom of the electric arc furnace.

[0004] The present invention is completed through the following technical scheme: a cooling device for the bottom of an electric arc furnace, including a furnace body, characterized in that the bottom of the furnace body is composed of a plurality of conductive copper tiles with cavities therein, which are sequentially spliced ​​into a conductive furnace bottom, each conductive copper tile is provided with a water inlet and a water outlet, the water inlet is connected to a tower-type equal flow water distributor through a water supply branch pipe, and the water outlet is connected to a water outlet branch pipe, so that a conductive furnace bottom is formed by conductive copper tiles, and cooling water is directly used in the copper tiles for cooling, thereby improving the cooling effect and facilitating the recovery of waste heat brought out by the water.

[0005] The water outlet pipe is connected to a cooler or to a device that needs hot water.

[0006] The conductive copper tiles are arranged in three circles from the center to the periphery. The first circle is a circular conductive copper tile arranged in the center of the furnace bottom. The second circle is arranged around the first circle to form a circle surrounded by multiple fan-shaped conductive copper tiles. The third circle is arranged around the second circle to form a circle surrounded by multiple fan-shaped conductive copper tiles, so that a downward concave circular conductive furnace bottom is formed by three circles of conductive copper tiles.

[0007] The second circle of sector-shaped conductive copper tiles is provided with four pieces connected to each other, and the third circle of sector-shaped conductive copper tiles is provided with sixteen pieces connected to each other.

[0008] The bottom of the circular conductive copper tile of the first circle is provided with two water inlets and two water outlets connected with its cavity; the bottom of each fan-shaped conductive copper tile of the second circle and the third circle is provided with a water inlet and a water outlet connected with its cavity, so as to directly cool the conductive copper tile by conveying cooling water into the cavity.

[0009] The tower-type uniform flow water distributor comprises a water supply main composed of a vertical upper thin tube and a lower thick tube. The upper thin tube and the lower thick tube are respectively connected to the inner sides of the upper and lower annular tubes through corresponding upper and lower horizontal connecting tubes. The outer sides of the upper and lower annular tubes are respectively connected to a plurality of corresponding upper water supply branches and a plurality of lower water supply branches which are arranged at intervals. The plurality of upper water supply branches are connected to the corresponding second circle of fan-shaped conductive copper tiles, and the lower water supply branches are connected to the corresponding third circle of fan-shaped conductive copper tiles. Two top water supply branches are arranged on the top of the upper thin tube. The top water supply branches are connected to the central circular conductive copper tiles of the first circle, so that when cooling water enters the upper thin tube from the lower thick tube to supply water, the water flow is evenly distributed to the upper and lower water supply branches, and the cooling water flow is adjusted by a throttling orifice.

[0010] The bottom end of the lower thick tube of the water supply main pipe is the water inlet end, and the top end of the upper thin tube is the closed end. The lower thick tube and the upper thin tube are connected through a tapered tube with a small top and a large bottom to evenly distribute cooling water.

[0011] The diameters of the upper horizontal connecting pipe and the upper annular pipe are smaller than the diameters of the lower horizontal connecting pipe and the lower annular pipe, so as to evenly distribute the cooling water while ensuring the consistency of the cooling water pressure and flow.

[0012] The upper and lower water supply branch pipes have the same diameter, and the number of elbows and the bending angle of each water supply branch pipe are the same, so that the flow rate and pressure of cooling water entering the conductive copper tile cavity remain consistent.

[0013] The upper and lower water supply branches are provided with throttling orifice plates, which include two flanges provided on the water supply branch pipes, and an orifice plate provided between the two flanges and having a plurality of through holes thereon. The number, shape and size of through holes in each throttling orifice plate are the same, so that the flow rate and flow velocity of the cooling water flowing through can be controlled through the through holes, so that the flow rate and flow velocity of the cooling water flowing through each water supply branch pipe are consistent.

[0014] The upper annular tube and the lower annular tube are provided with pressure gauges for detecting water pressure.

[0015] The present invention has the following advantages and effects: by adopting the above scheme, the arc furnace bottom of the ore-heating furnace formed by several conductive copper tiles with cavities therein can be conveniently connected with the conductive copper tile cavities through the water supply pipe, that is, water is used as the cooling medium to effectively water-cool the conductive copper tiles of the furnace bottom, and then the tower-type flow-equalizing water distributor is used to evenly deliver cooling water with a consistent flow rate and pressure to the cavities of each conductive copper tile, which greatly improves the cooling effect while saving water resources to the maximum extent, and the heated cooling water can be used for other purposes to make full use of the heat energy, and the cooled water can be returned for recycling, which greatly reduces the cooling cost and is more environmentally friendly. It is indeed an ideal furnace bottom cooling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present invention;

[0017] Figure 2 for Figure 1 Enlarged view of part A in . DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] The invention provides a furnace bottom cooling device for an ore-fired furnace, comprising a furnace body 1, wherein the bottom of the furnace body 1 is formed by a plurality of conductive copper tiles with cavities therein, which are sequentially spliced ​​into an arc-shaped bottom 11, and each conductive copper tile is provided with a water inlet and a water outlet, wherein the water inlet is connected to a tower-type equalizing water distributor 2 through a water supply branch pipe, and the water outlet is connected to a water outlet branch pipe 4, and the water outlet branch pipe 4 is connected to a cooler water inlet main pipe (not shown in the figure) to cool the cooling water after absorbing heat and then return it for use, or to connect it to equipment that needs to use hot water, so as to make full use of the thermal energy of the hot water, and then return the water for use, thereby realizing water circulation; a conductive furnace bottom is formed by conductive copper tiles, and cooling water is directly transported into the copper tile cavity for cooling. Cooling to improve the cooling effect; the conductive copper tile is arranged in three circles from the center to the periphery, the first circle is a circular conductive copper tile 14 arranged in the center of the furnace bottom, the second circle is arranged around the first circle and is surrounded by four interconnected fan-shaped conductive copper tiles 13, and the third circle is arranged around the second circle and is surrounded by sixteen interconnected fan-shaped conductive copper tiles 12; the bottom of the circular conductive copper tile 14 of the first circle is provided with two water inlets and two water outlets connected to its cavity; the bottom of each fan-shaped conductive copper tile 13, 12 of the second and third circles is provided with a water inlet and a water outlet connected to its cavity, so as to directly cool the conductive copper tile by conveying cooling water into the cavity.

[0020] The tower-type equal flow water distributor 2 comprises a water supply main composed of a vertical upper thin tube 23 and a lower thick tube 21. The upper thin tube 23 and the lower thick tube 21 are respectively connected to the inner sides of the upper and lower annular tubes 25 and 28 through corresponding upper and lower horizontal connecting tubes 24 and 29. The outer sides of the upper and lower annular tubes 25 and 28 are respectively connected to four upper water supply branches 26 and sixteen lower water supply branches 27 which are arranged at intervals. The four upper water supply branches 26 are connected to the four fan-shaped conductive copper tiles 13 of the corresponding second circle. The lower water supply branches 27 are connected to the corresponding fan-shaped conductive copper tiles 13 of the second circle. 27 is connected with the corresponding sixteen fan-shaped conductive copper tiles 12 of the third circle, and two top water supply branches 231 are provided on the top of the upper capillary tube 23, and the top water supply branch 231 is connected with the central circular conductive copper tile 14 of the first circle, and the upper and lower water supply branches 26 and 27 are provided with throttling orifice plates 3, so that when the cooling water enters from the lower thick tube 21 and flows to the upper capillary tube 23 for water supply, the water flow is evenly distributed to the upper and lower water supply branches 26 and 27, and then the cooling water flow is adjusted by the throttling orifice plates 3; the lower thick tube of the water supply main pipe The bottom end of the upper thin tube 21 is the water inlet end, and the top end of the upper thin tube 23 is the closed end. The lower thick tube 21 and the upper thin tube 23 are connected by a tapered tube 22 with a small top and a large bottom, so as to evenly distribute the cooling water; the diameters of the upper horizontal connecting tube 24 and the upper annular tube 25 are smaller than the diameters of the lower horizontal connecting tube 29 and the lower annular tube 28, so as to evenly distribute the cooling water while ensuring the consistency of the cooling water pressure and flow; the diameters of the upper and lower water supply branches 26 and 27 are the same, and the number of elbows and the bending angles of each water supply branch are the same, so as to The cooling water flow and pressure entering the conductive copper tile cavity are kept consistent; the throttling orifice plate 3 includes two flanges arranged on the water supply branch pipe, and an orifice plate with a plurality of through holes arranged between the two flanges, and the number, shape and size of the through holes of each throttling orifice plate are the same, so as to control the cooling water flow and flow rate through the through holes, so that the cooling water flow and flow rate flowing through each water supply branch pipe are consistent; the upper annular tube 25 and the lower annular tube 28 are provided with pressure gauges (not shown in the figure) for detecting water pressure.

Claims

1. A submerged arc furnace bottom cooling device, comprising a furnace body, characterized in that The bottom of the furnace body is composed of a plurality of conductive copper tiles with cavities therein, which are sequentially spliced ​​into a conductive furnace bottom. Each conductive copper tile is provided with a water inlet and an outlet. The water inlet is connected to the tower-type equal flow water distributor through a water supply branch pipe, and the water outlet is connected to the water outlet branch pipe. The conductive copper tiles are arranged in three circles from the center to the periphery, the first circle is a circular conductive copper tile arranged in the center of the furnace bottom, the second circle is arranged around the first circle and is formed by a plurality of fan-shaped conductive copper tiles, and the third circle is arranged around the second circle and is formed by a plurality of fan-shaped conductive copper tiles, forming a circular conductive furnace bottom; The tower-type equal flow water distributor comprises a water supply main composed of a vertical upper thin tube and a lower thick tube, the upper thin tube and the lower thick tube are respectively connected to the inner sides of the upper and lower annular tubes through corresponding upper and lower horizontal connecting tubes, the outer sides of the upper and lower annular tubes are respectively connected to a plurality of corresponding upper water supply branches and a plurality of lower water supply branches which are arranged at intervals, the plurality of upper water supply branches are connected to the corresponding second circle of fan-shaped conductive copper tiles, the lower water supply branches are connected to the corresponding third circle of fan-shaped conductive copper tiles, and a top water supply branch is provided on the top of the upper thin tube, which is connected to the central circular conductive copper tile of the first circle; The bottom end of the lower thick tube of the water supply main pipe is the water inlet end, the top end of the upper thin tube is the closed end, and the lower thick tube and the upper thin tube are connected through a tapered tube with a small top and a large bottom.

2. The submerged arc furnace bottom cooling device according to claim 1 is characterized in that The second circle of fan-shaped conductive copper tiles is provided with four pieces connected to each other, and the third circle of fan-shaped conductive copper tiles is provided with sixteen pieces connected to each other.

3. The submerged arc furnace bottom cooling device according to claim 1 is characterized in that The bottom of the circular conductive copper tile of the first circle is provided with two water inlets and two water outlets connected with its cavity; the bottom of each fan-shaped conductive copper tile of the second circle and the third circle is provided with a water inlet and a water outlet connected with its cavity.

4. The submerged arc furnace bottom cooling device according to claim 1, characterized in that The diameters of the upper horizontal connecting pipe and the upper annular pipe are smaller than those of the lower horizontal connecting pipe and the lower annular pipe; the diameters of the upper and lower water supply branch pipes are the same, and the number of elbows and the bending angles of each water supply branch pipe are the same.

5. The submerged arc furnace bottom cooling device according to claim 1, characterized in that The upper and lower water supply branches are provided with throttling orifice plates, which include two flanges arranged on the water supply branch pipe and an orifice plate with a plurality of through holes arranged between the two flanges, and the through holes of each throttling orifice plate are the same in number, shape and size.

6. The submerged arc furnace bottom cooling device according to claim 1, characterized in that The upper annular tube and the lower annular tube are provided with pressure gauges.

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