Metallurgical equipment heat energy recovery device

Abstract

The utility model discloses a metallurgical equipment heat energy recovery device which comprises a heat energy recovery box, a coiled pipe for guiding flue gas to flow is installed inside the heat energy recovery box, a spraying head for spraying water to the coiled pipe is arranged on the heat energy recovery box, and the heat energy recovery box is connected with a hot water collecting device. According to the heat energy recovery device of the metallurgical equipment, the flowing duration of flue gas in the heat energy recovery box is prolonged, the loss of the flue gas doped with heat energy is reduced, and the heat energy recovery efficiency is improved; the phenomenon that heat of the coiled pipe is not recycled due to the fact that the water temperature in the heat energy recycling box is too high is avoided; the cold and hot water replacement speed of the heat energy recovery device is increased, and the heat energy loss of the heat energy recovery device in the cold and hot water replacement process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment, and particularly relates to a heat energy recovery device for metallurgical equipment. Background Art

[0002] The existing heat recovery device for metallurgical equipment has a relatively large loss when recovering the heat energy mixed with the flue gas generated by the metallurgical equipment, and it is easy to fail to recover the heat of the serpentine tube due to the high water temperature during heat recovery.

[0003] Chinese patent application number 202220977642.7 discloses an exhaust gas heat energy recovery device for metallurgical equipment, including a recovery boiler body, a drum tank, a steam riser pipe, and a recycled water descending pipe. The recovery boiler has a flue inlet for exhaust gas entry on the lower side and a flue gas outlet at the upper end. There are multiple steam riser pipes connected between the tank body on one side of the drum tank and the heat exchange pipe of the recovery boiler body. There are multiple recycled water descending pipes connected between the tank body on the other side of the drum tank and the recycled water pipe of the recovery boiler body.

[0004] It is hoped to provide an improved heat recovery device for metallurgical equipment, in particular to improve the problem of low heat recovery efficiency. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a heat recovery device for metallurgical equipment, the purpose of which is to improve the heat recovery efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a heat recovery device for metallurgical equipment, including a heat recovery box, a serpentine pipe for guiding the flow of flue gas is installed inside the heat recovery box, a sprinkler head for spraying water to the serpentine pipe is provided on the heat recovery box, and the heat recovery box is connected to a hot water collection device.

[0007] The top of the heat recovery box is connected to the sprinkler head and the water pipe through connecting pipes, the water pipe is connected to the water supply pipe through a first solenoid valve, the top of the water pipe is connected to a water pump through a delivery pipe, and the water pump is connected to a second solenoid valve through a water pipe.

[0008] The installation end of the sprinkler head is sealed and connected to one end of the connecting pipe, and the bottom end of the water guide pipe is sealed and connected to the other end of the connecting pipe.

[0009] One end of the first solenoid valve is sealedly connected to one side of the water pipe, one end of the water supply pipe is sealedly connected to the other end of the first solenoid valve, one end of the delivery pipe is sealedly connected to the top of the water pipe, the other end of the delivery pipe is sealedly connected to one end of the water pump, the other end of the water pump is sealedly connected to one end of the water pipe, the other end of the water pipe is sealedly connected to one end of the second solenoid valve, and the other end of the second solenoid valve is sealedly connected to one side of the heat recovery box and communicates with its interior.

[0010] The hot water collection device includes a hot water storage tank and a water suction pump. The bottom end of the heat recovery tank is connected to the water suction pump through a third solenoid valve, and the other end of the water suction pump is connected to the hot water storage tank through a drain pipe.

[0011] One end of the third solenoid valve is sealed connected to the bottom end of the heat energy recovery tank, the other end of the third solenoid valve is sealed connected to one end of the water suction pump, the other end of the water suction pump is sealed connected to one end of the drain pipe, and the other end of the drain pipe is sealed connected to one side of the hot water storage tank.

[0012] One end of the serpentine tube is sealed and connected to a smoke outlet pipe, and the other end of the serpentine tube is sealed and connected to a smoke extractor.

[0013] The first solenoid valve, the second solenoid valve and the third solenoid valve are electrically connected to a controller via wires.

[0014] The controller is electrically connected to a temperature sensor and a time relay through a wire. The mounting end of the temperature sensor is fixedly connected to the outer surface of the heat recovery box, and the detection end of the temperature sensor is located inside the heat recovery box.

[0015] The heat recovery device for metallurgical equipment of the present invention has the following beneficial effects:

[0016] 1. It increases the time that the flue gas flows in the heat recovery box, reduces the loss of heat energy mixed with the flue gas, and improves the heat recovery efficiency;

[0017] 2. Avoid the phenomenon that the water temperature inside the heat recovery box is too high, resulting in the failure to recover heat from the serpentine tube;

[0018] 3. It speeds up the heat recovery device in replacing hot and cold water, and reduces the heat energy loss of the heat recovery device in the process of replacing hot and cold water. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] This manual includes the following drawings, which show the following contents:

[0020] Figure 1 This is a schematic structural diagram of a heat recovery device for metallurgical equipment according to the present utility model;

[0021] Figure 2 This is a side view of the utility model of the heat recovery device for metallurgical equipment;

[0022] Figure 3 This is a cross-sectional view of the utility model of the heat energy recovery device for metallurgical equipment;

[0023] Figure 4 This is a control flow chart of the heat energy recovery device for metallurgical equipment of the utility model;

[0024] The following are marked in the figure:

[0025] 1. Heat recovery tank; 11. Connecting pipe; 12. Sprinkler head; 13. Water pipe; 14. First solenoid valve; 15. Water supply pipe; 16. Delivery pipe; 17. Water pump; 18. Water pipe; 19. Second solenoid valve; 20. Coil pipe; 21. Smoke exhaust pipe; 22. Range hood; 23. Third solenoid valve; 24. Water pump; 25. Drain pipe; 26. Hot water storage tank; 27. Controller; 28. Temperature sensor; 29. ​​Time relay. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation methods of the present invention by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0027] It should be noted that in the following embodiments, the "first", "second" and "third" do not represent an absolute distinction in structure and / or function, nor do they represent a sequence of execution, but are merely for the convenience of description.

[0028] See also Figures 1 to 4The present embodiment provides a heat recovery device for metallurgical equipment, comprising a heat recovery box 1, the top of the heat recovery box 1 is respectively connected to a spray head 12 and a water pipe 13 through a connecting pipe 11, the installation end of the spray head 12 is sealedly connected to one end of the connecting pipe 11, the bottom end of the water pipe 13 is sealedly connected to the other end of the connecting pipe 11, one side of the water pipe 13 is connected to a water supply pipe 15 through a first solenoid valve 14, the top of the water pipe 13 is connected to a water pump 17 through a delivery pipe 16, the other end of the water pump 17 is connected to a second solenoid valve 19 through a water pipe 18, one end of the first solenoid valve 14 is sealedly connected to one side of the water pipe 13, one end of the water supply pipe 15 is sealedly connected to the other end of the first solenoid valve 14, one end of the delivery pipe 16 is sealedly connected to the top of the water pipe 13, the other end of the delivery pipe 16 is sealedly connected to one end of the water pump 17, and the other end of the water pump 17 is sealedly connected to the water pump One end of the pipe 18 and the other end of the water pumping pipe 18 are sealed and connected to one end of the second solenoid valve 19. The other end of the second solenoid valve 19 is sealed and connected to one side of the heat recovery box 1 and is communicated with its interior. A serpentine pipe 20 is installed inside the heat recovery box 1. One end of the serpentine pipe 20 is sealed and connected to the smoke outlet pipe 21. The other end of the serpentine pipe 20 is sealed and connected to the smoke exhaust fan 22. When the flue gas generated by the metallurgical equipment is discharged from the smoke outlet pipe 21, the flue gas will enter the interior of the serpentine pipe 20. In this process, the water pump 17 extracts the water inside the heat recovery box 1 through the water pumping pipe 18 and transports it to the interior of the delivery pipe 16. The delivery pipe 16 then transports the water to the connecting pipe 11 through the water guide pipe 13, and finally sprays it out from the sprinkler head 12, so as to absorb the heat on the surface of the serpentine pipe 20, thereby increasing the time the flue gas flows in the heat recovery box 1 and reducing the loss of heat energy mixed with the flue gas.

[0029] The bottom end of the heat recovery tank 1 is connected to a water suction pump 24 through a third solenoid valve 23, and the other end of the water suction pump 24 is connected to a hot water storage tank 26 through a drain pipe 25. One end of the third solenoid valve 23 is sealed and connected to the bottom end of the heat recovery tank 1, and the other end of the third solenoid valve 23 is sealed and connected to one end of the water suction pump 24, and the other end of the water suction pump 24 is sealed and connected to one end of the drain pipe 25, and the other end of the drain pipe 25 is sealed and connected to one side of the hot water storage tank 26. When the water temperature in the heat recovery tank 1 reaches the detection range of the temperature sensor 28, the controller 27 will control the second solenoid valve 19 to close and control the third solenoid valve 23 to open, and then control the water suction pump 24 to operate, and the pumping pump 17 stops operating. At this time, the water suction pump 24 will pump out the water in the heat recovery tank 1 and transport it to the inside of the hot water storage tank 26 through the drain pipe 25, thereby avoiding the phenomenon that the water temperature inside the heat recovery tank 1 is too high and the heat of the serpentine tube 20 is not recovered.

[0030] For details, see Figure 1 and Figure 4The first, second, and third solenoid valves 14, 19, and 23 are each electrically connected to a controller 27 via wires. The controller 27 is also electrically connected to a temperature sensor 28 and a time relay 29. The mounting end of the temperature sensor 28 is fixedly attached to the exterior of the heat recovery tank 1, while the detection end of the temperature sensor 28 is located within the heat recovery tank 1. When the operating time of the water suction pump 24 reaches the set range of the time relay 29, the controller 27 stops the water suction pump 24, closes the third solenoid valve 23, and opens the first solenoid valve 14, allowing the water supply pipe 15 to automatically add cold water to the heat recovery tank 1. During this addition process, the water supply pipe 15 transports the water into the water conduit 13, which is then transported by the connecting pipe 11 to the sprinkler head 12 for spraying. This spray absorbs heat from the serpentine pipe 20, speeding up the heat recovery device's hot and cold water switching process and reducing heat loss during the hot and cold water switching process.

[0031] When the time for adding water to the water supply pipe 15 reaches the detection range of the time relay 29, the controller 27 will control the first solenoid valve 14 to close, and at the same time control the water pump 17 to operate, and control the second solenoid valve 19 to open. At this time, the heat recovery box 1 will circulate normally.

[0032] The above description of the present invention is provided as an example, in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any application of the above-described concepts and technical solutions of the present invention to other situations without modification, are all within the scope of protection of the present invention.

Claims

1. A heat recovery device for metallurgical equipment, comprising a heat recovery box (1), characterized in that: The heat recovery box (1) is internally provided with a serpentine tube (20) for guiding the flow of flue gas, the heat recovery box (1) is provided with a spray head (12) for spraying water toward the serpentine tube (20), and the heat recovery box (1) is connected to a hot water collection device; The top end of the heat recovery box (1) is connected to the sprinkler head (12) and the water pipe (13) via a connecting pipe (11), the water pipe (13) is connected to a water supply pipe (15) via a first electromagnetic valve (14), the top end of the water pipe (13) is connected to a water pump (17) via a delivery pipe (16), and the water pump (17) is connected to a second electromagnetic valve (19) via a water pump pipe (18); One end of the first solenoid valve (14) is sealed and connected to one side of the water pipe (13), one end of the water supply pipe (15) is sealed and connected to the other end of the first solenoid valve (14), one end of the delivery pipe (16) is sealed and connected to the top end of the water pipe (13), the other end of the delivery pipe (16) is sealed and connected to one end of the water pump (17), the other end of the water pump (17) is sealed and connected to one end of the water pump pipe (18), the other end of the water pump pipe (18) is sealed and connected to one end of the second solenoid valve (19), and the other end of the second solenoid valve (19) is sealed and connected to one side of the heat recovery box (1) and communicates with the interior thereof; The hot water collection device comprises a hot water storage tank (26) and a water suction pump (24); the bottom end of the heat recovery tank (1) is connected to the water suction pump (24) via a third solenoid valve (23); the other end of the water suction pump (24) is connected to the hot water storage tank (26) via a drain pipe (25); One end of the third solenoid valve (23) is sealed and connected to the bottom end of the heat recovery tank (1), the other end of the third solenoid valve (23) is sealed and connected to one end of the water suction pump (24), the other end of the water suction pump (24) is sealed and connected to one end of the drain pipe (25), and the other end of the drain pipe (25) is sealed and connected to one side of the hot water storage tank (26); The first solenoid valve (14), the second solenoid valve (19), and the third solenoid valve (23) are electrically connected to a controller (27) via wires. The controller (27) is electrically connected to a temperature sensor (28) and a time relay (29) via a wire; a mounting end of the temperature sensor (28) is fixedly connected to the outer surface of the heat recovery box (1); and a detection end of the temperature sensor (28) is located inside the heat recovery box (1).

2. The heat recovery device for metallurgical equipment according to claim 1, characterized in that: The installation end of the sprinkler head (12) is sealed and connected to one end of the connecting pipe (11), and the bottom end of the water guide pipe (13) is sealed and connected to the other end of the connecting pipe (11).

3. The heat recovery device for metallurgical equipment according to claim 1, characterized in that: One end of the serpentine tube (20) is sealedly connected to a smoke outlet pipe (21), and the other end of the serpentine tube (20) is sealedly connected to a smoke extractor (22).

Images