Waste heat recycling device for slag powder production line

Abstract

The utility model discloses a slag powder production line waste heat recycling device which comprises a vertical mill, a hot blast stove and a finished product tank, a conveying device is arranged between a discharging port of the vertical mill and a feeding port of the finished product tank, a heat exchange pipe is arranged in the finished product tank, the top end of the heat exchange pipe is communicated with an air inlet pipe, and a heat preservation shell is arranged on the outer side of the vertical mill. A heat conduction plate is arranged on the inner side of the heat preservation shell, a heating cavity is formed in the heat preservation shell, the tail end of the heat exchange pipe communicates with an air supply pipe, one end of the air supply pipe penetrates and extends out of the finished product tank to communicate with the heating cavity, a fixing support is installed below the hot blast stove, and a fixing fan is installed on the fixing support. An air guide pipe is communicated between the air inlet end of the fixed fan and the heating cavity, and an air supply pipe is communicated between the air outlet end of the fixed fan and the hot blast stove. The hot blast stove has the advantages that double heating is achieved, waste heat can be fully utilized, the air heating efficiency is improved, and the energy consumption of the hot blast stove is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of slag powder production, in particular to a waste heat recovery and utilization device for a slag powder production line. Background Art

[0002] Slag powder is a powdered product obtained by ultrafine grinding water-quenched slag discharged from ironmaking blast furnaces. In the slag powder production process, after grinding, the material is dried and conveyed through a hot air furnace into a vertical mill. The finished powder delivered to the finished product tank is relatively hot. Effectively utilizing this waste heat can reduce the operating pressure of the hot air furnace.

[0003] Utility model application number CN201920608028.1 discloses a waste heat utilization device for a slag micro-powder production line. A fan delivers outside air into a heat exchange tube, where it exchanges heat with the heated finished material in the finished product tank. The resulting hot air, after heat exchange, flows through a subsurface air supply duct and then back into the hot blast furnace, where it is heated simultaneously with the newly entering air. This effectively reduces the energy consumed by the hot blast furnace to heat the air, achieving cost savings.

[0004] The above device exchanges heat with the outside air through the heat exchange tube, and heats it simultaneously with the air newly entering the hot blast furnace. The air intake of the heat exchange tube is relatively low, and it needs to be heated simultaneously with the air newly entering the hot blast furnace, which reduces the temperature of the hot air after the heat exchange, but the energy consumption reduction is limited. The vertical mill also generates waste heat during operation, and this part of the waste heat cannot be effectively utilized.

[0005] It should be noted that the above content falls within the technical knowledge of the inventor and does not necessarily constitute prior art. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems and to design a waste heat recovery and utilization device for a slag powder production line.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The heat dissipation device of claim 1, wherein the heat dissipation device is connected to the heat dissipation device by way of example only, and the heat dissipation device is connected to the heat dissipation device by way of example only.

[0009] Furthermore, a plurality of air inlet pipes are provided on the top of the heat-insulating shell, the air inlet pipes are connected to the heating cavity, an electromagnetic valve is provided on the air inlet pipe, a fixed through hole is provided on one side of the heat-insulating shell and the heat-conducting plate, the diameter of the fixed through hole is the same as the outer diameter of the pipe, and the pipe passes through the fixed through hole and is connected to the vertical mill.

[0010] Furthermore, the heat-insulating outer shell is connected by snapping together two semicircular outer shells, and the heat-conducting plate is composed of two semicircular heat-conducting plates.

[0011] Furthermore, the heat exchange tube is spirally arranged in the finished product tank, and an air filter is installed at one end of the air inlet pipe extending out of the finished product tank.

[0012] Furthermore, thermal insulation cotton is provided on the outer walls of the air supply pipe, the air guide pipe and the air supply pipe.

[0013] Compared with the existing technology, this technical solution has the following beneficial effects:

[0014] The heat exchange tube exchanges heat with the air entering from the outside, and the hot air enters the heating cavity through the air supply pipe, heats the heat-insulating shell through the heat conduction plate, and is heated again after entering the heating cavity. The hot air enters the hot air furnace through the air guide pipe and the air supply pipe, and is double-heated by the heat exchange tube and the heat conduction plate, which can make full use of the waste heat, improve the air heating efficiency, and reduce the energy consumption of the hot air furnace;

[0015] By opening the electromagnetic valve, the outside air enters the heating cavity directly through the air intake pipe, and the air is heated in the heating cavity, which increases the air intake and improves the working efficiency;

[0016] The heat exchange tube is in the shape of a spiral disk, which can fully contact the material in the finished product tank, thereby improving the heat exchange efficiency. The air is purified through the air filter to prevent impurities from entering the pipe, clogging the pipe, and affecting the air intake efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a waste heat recovery and utilization device for a slag powder production line described in the utility model.

[0018] Figure 2 This is an enlarged cross-sectional view of the finished can.

[0019] Figure 3 An enlarged cross-sectional view of the insulation shell.

[0020] Figure 4 This is an enlarged top view of the insulation shell and heat conducting plate.

[0021] In the figure: 1. Vertical mill; 2. Hot air furnace; 3. Finished product tank; 4. Pipeline; 5. Conveying device; 6. Heat exchange tube; 7. Air inlet pipe; 8. Insulation shell; 9. Heat conduction plate; 10. Heating cavity; 11. Air supply pipe; 12. Fixed bracket; 13. Fixed fan; 14. Air guide pipe; 15. Air supply pipe; 16. Inlet pipe; 17. Solenoid valve; 18. Fixed through hole; 19. Air filter; 20. Insulation cotton. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0024] The utility model provides Figure 1-4The waste heat recovery and utilization device of a slag powder production line shown in the figure includes a vertical mill 1, a hot blast furnace 2 and a finished product tank 3. A pipe 4 is connected between the vertical mill 1 and the hot blast furnace 2. A conveying device 5 is provided between the discharge port of the vertical mill 1 and the feed port of the finished product tank 3. A heat exchange tube 6 is provided in the finished product tank 3. The top of the heat exchange tube 6 is connected to an air inlet pipe 7. The end of the air inlet pipe 7 away from the heat exchange tube 6 extends through the finished product tank 3. An insulating shell 8 is provided on the outside of the vertical mill 1, and a heat conducting plate 9 is provided on the inside of the insulating shell 8. The heat conducting plate 9 is fitted with the outer side of the vertical mill 1, a heating cavity 10 is provided in the heat-insulating outer shell 8, the end of the heat exchange tube 6 is connected with an air supply pipe 11, one end of the air supply pipe 11 extends through the finished product tank 3 and is connected with the heating cavity 10, a fixed bracket 12 is installed under the hot blast furnace 2, a fixed fan 13 is installed on the fixed bracket 12, an air guide pipe 14 is connected between the air inlet end of the fixed fan 13 and the heating cavity 10, and an air supply pipe 15 is connected between the air outlet end of the fixed fan 13 and the hot blast furnace 2.

[0025] After the slag is ground by the vertical mill 1, the finished material produced is transported to the finished product tank 3 through the conveying device 5, and the hot air generated by the hot blast furnace 2 is transported to the vertical mill 1 through the pipe 4. This technology is existing technology and will not be described in detail. After the material enters the finished product tank 3, the heat exchange pipe 6 is buried, and the fixed fan 13 starts working. The air enters the heat exchange pipe 6 through the air inlet pipe 7 and exchanges heat with the heated material in the finished product tank 3. After the heat exchange is completed, the hot air generated enters the heating cavity 10 through the air supply pipe 11. The excess heat of the vertical mill 1 is absorbed by the heat conduction plate 9, and the insulation shell 8 is heated by the heat conduction plate 9. After the hot air enters the heating cavity 10, it is heated again and enters the hot blast furnace 2 through the air guide pipe 14 and the air supply pipe 15. It is doubly heated by the heat exchange pipe 6 and the heat conduction plate 9, which can make full use of the waste heat, improve the air heating efficiency, and reduce the energy consumption of the hot blast furnace 2.

[0026] Refer to the instruction manual Figure 1 , Instruction Manual Figure 3 and instructions attached Figure 4 A plurality of air inlet pipes 16 are provided on the top of the heat-insulating shell 8, and the air inlet pipes 16 are connected to the heating cavity 10. An electromagnetic valve 17 is provided on the air inlet pipe 16. A fixed through hole 18 is provided on one side of the heat-insulating shell 8 and the heat-conducting plate 9. The diameter of the fixed through hole 18 is the same as the outer diameter of the pipe 4. The pipe 4 passes through the fixed through hole 18 and is connected to the vertical mill 1.

[0027] When the air intake of the air inlet pipe 7 is insufficient, the electromagnetic valve 17 opens, and the outside air directly enters the heating cavity 10 through the air inlet pipe 16. The air is heated in the heating cavity 10, which increases the air intake and improves work efficiency.

[0028] Refer to the instruction manual Figure 4The heat-insulating shell 8 is connected by two semicircular shells, and the heat-conducting plate 9 is composed of two semicircular heat-conducting plates 9.

[0029] The heat-insulating outer shell 8 is connected by two semicircular outer shells, and the heat-conducting plate 9 is composed of two semicircular heat-conducting plates 9, which is convenient for assembly and disassembly and improves work efficiency.

[0030] Refer to the instruction manual Figure 1 and instructions attached Figure 2 The heat exchange tube 6 is spirally arranged in the finished product tank 3, and the air inlet pipe 7 extends out of the finished product tank 3 and is equipped with an air filter 19 at one end.

[0031] The heat exchange tube 6 is a spiral disk, which can fully contact the material in the finished product tank 3, thereby improving the heat exchange efficiency. The air is purified by the air filter 19 to prevent impurities from entering the pipeline, clogging the pipeline, and affecting the air intake efficiency.

[0032] Refer to the instruction manual Figure 1 , Instruction Manual Figure 2 and instructions attached Figure 3 Thermal insulation cotton 20 is provided on the outer walls of the air supply pipe 11, the air guide pipe 14 and the air supply pipe 15.

[0033] The heat-insulating cotton 20 insulates the air supply pipe 11 , the air guide pipe 14 and the air supply pipe 15 to prevent heat loss during hot air transportation.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A waste heat recovery and utilization device for a slag powder production line, comprising a vertical mill (1), a hot blast furnace (2) and a finished product tank (3), wherein a pipeline (4) is connected between the vertical mill (1) and the hot blast furnace (2), and a conveying device (5) is provided between the discharge port of the vertical mill (1) and the feed port of the finished product tank (3), characterized in that: The finished product tank (3) is provided with a heat exchange tube (6), the top end of the heat exchange tube (6) is connected to an air inlet tube (7), and the air inlet tube (7) extends through the finished product tank (3) at one end away from the heat exchange tube (6). The vertical mill (1) is provided with a heat insulation shell (8) on the outside, and a heat conduction plate (9) is provided on the inside of the heat insulation shell (8). The heat conduction plate (9) is attached to the outside of the vertical mill (1). A heating cavity (10) is provided in the heat insulation shell (8). The end of the heat exchange tube (6) is provided with a heat insulation shell (8). An air supply pipe (11) is connected, one end of the air supply pipe (11) extends through the finished product tank (3) and is connected to the heating cavity (10), a fixed bracket (12) is installed below the hot air furnace (2), a fixed fan (13) is installed on the fixed bracket (12), an air guide pipe (14) is connected between the air inlet end of the fixed fan (13) and the heating cavity (10), and an air supply pipe (15) is connected between the air outlet end of the fixed fan (13) and the hot air furnace (2).

2. The waste heat recovery device for a slag powder production line according to claim 1, characterized in that: A plurality of air inlet pipes (16) are provided on the top of the heat-insulating shell (8), the air inlet pipes (16) are communicated with the heating cavity (10), and an electromagnetic valve (17) is provided on the air inlet pipe (16). A fixed through hole (18) is provided on one side of the heat-insulating shell (8) and the heat-conducting plate (9), the diameter of the fixed through hole (18) being the same as the outer diameter of the pipe (4), and the pipe (4) passes through the fixed through hole (18) and is communicated with the vertical mill (1).

3. The waste heat recovery device for a slag powder production line according to claim 1, characterized in that: The heat-insulating outer shell (8) is connected by snapping two semicircular outer shells, and the heat-conducting plate (9) is composed of two semicircular heat-conducting plates (9).

4. The waste heat recovery device for a slag powder production line according to claim 1, characterized in that: The heat exchange tube (6) is spirally arranged in the finished product tank (3), and an air filter (19) is installed at one end of the air inlet pipe (7) extending out of the finished product tank (3).

5. The waste heat recovery device for a slag powder production line according to claim 1, characterized in that: Thermal insulation cotton (20) is provided on the outer walls of the air supply pipe (11), the air guide pipe (14) and the air supply pipe (15).

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