Waste Heat Recovery Device for the Feeding Bin of Tower-Type Melting Furnace

Abstract

The present invention discloses a waste heat recovery device for a feeding bin of a tower-type melting furnace, which includes a feeding bin connected by left and right wall panels, a rear back panel and a connecting bottom plate, a furnace well cover, a heat collecting cover, a water supply pipe, an upper connecting horizontal pipe, a lower connecting horizontal pipe and a serpentine heat exchange coil. The left and right shunt risers are symmetrically arranged near the left and right sides of the rear part of the furnace well cover. The left and right heat exchange rows of pipes are symmetrically arranged near the left and right wall panels. The water supply pipe is respectively communicated with the water inlet ends of the right shunt riser and the lower connecting horizontal pipe. The water outlet end of the lower connecting horizontal pipe is communicated with the water inlet end of the left shunt riser. The left and right heat exchange rows of pipes are respectively communicated with the upper and lower collecting left pipes and the upper and lower collecting right pipes. The water outlet end of the right heat exchange row of pipes is communicated with the upper connecting horizontal pipe. The water outlet ends of the left heat exchange row of pipes and the upper connecting horizontal pipe are collected into the serpentine heat exchange coil, and the hot water of the serpentine heat exchange coil flows to a heat storage container. After adopting the above scheme, the waste heat of the feeding bin and the heat collecting cover is absorbed, and the hot water after collecting the waste heat is used for lithium bromide refrigeration or domestic water.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy melting equipment, and particularly to a waste heat recovery device for the charging bin of a tower melting furnace.

Background Art

[0002] The tower melting furnace is used to melt block aluminum alloy into molten aluminum, and the molten aluminum can be used for the motor rotor to cast the squirrel cage bars and end rings of the rotor. In the prior art, the hopper of the feeding vehicle enters and exits the charging bin of the tower melting furnace, which is set at a high position on the top of the tower melting furnace. A heat collecting cover is arranged above the charging bin. Due to the upward flow of hot air and the heat conduction of the charging bin, the temperature in the heat collecting cover is as high as over 350 °C. Part of the heat in the cover is dissipated into the surrounding environment, making the indoor environment unbearably hot, and part of the heat is extracted by the induced draft fan after passing through the dust collector and diffused outdoors, resulting in a large amount of waste heat being wasted without reason.

Summary of the Invention

[0003] To overcome the deficiencies of the above prior art, the purpose of the present invention is to provide a waste heat recovery device for the charging bin of a tower melting furnace.

[0004] For this purpose, the present invention provides the following technical solutions:

[0005] The waste heat recovery device for the charging bin of a tower melting furnace includes a charging bin, a furnace wellhead pry cover, and a heat collecting cover connected to the top of the charging bin. The charging bin is formed by connecting a left wall panel, a right wall panel, a rear wall panel, and a connecting bottom plate. The furnace wellhead pry cover is located above the connecting bottom plate. The improvement lies in that: it further includes a water supply pipe, an upper connecting horizontal pipe, a lower connecting horizontal pipe arranged behind and above the furnace wellhead pry cover, and a serpentine heat exchange coil arranged in the heat collecting cover. Left and right shunt risers are symmetrically arranged near the left and right sides at the rear of the furnace wellhead pry cover, and the left and right shunt risers are respectively close to the rear wall panel. Left and right heat exchange rows of pipes are symmetrically arranged near the left wall panel and the right wall panel. The water supply pipe is respectively connected to the water inlet ends of the right shunt riser and the lower connecting horizontal pipe. Among them, the water outlet end of the right shunt riser is connected to the lower right collecting pipe, and the right heat exchange rows of pipes are respectively connected to the upper right collecting pipe and the lower right collecting pipe. The water outlet end of the right heat exchange rows of pipes is connected to the upper connecting horizontal pipe; the water outlet end of the lower connecting horizontal pipe is connected to the water inlet end of the left shunt riser, the water outlet end of the left shunt riser is connected to the lower left collecting pipe, and the left heat exchange rows of pipes are respectively connected to the upper left collecting pipe and the lower left collecting pipe. The water outlet ends of the left heat exchange rows of pipes and the water outlet end of the upper connecting horizontal pipe jointly converge to the serpentine heat exchange coil, and the hot water outlet end of the serpentine heat exchange coil flows to the heat storage container.

[0006] The above charging bin is respectively provided with a front lifting movable door and a rear lifting movable door. The front and rear lifting movable doors are respectively driven by a sprocket, and the front and rear lifting movable doors move up and down along their respective guide rails.

[0007] The above heat collecting cover is provided with an exhaust port at its top end.

[0008] The present invention has the following advantages and positive effects:

[0009] By arranging heat exchange pipes in the feeding bin and a serpentine heat exchange coil in the heat collecting hood, using water as the heat exchange medium to flow through the heat exchange pipes and then through the serpentine heat exchange coil, the waste heat diffused in the feeding bin and the high-temperature waste heat filled in the heat collecting hood are absorbed in turn. Greatly reduce the waste heat in the feeding bin from being dissipated into the surrounding environment, and reduce a large amount of waste heat from being discharged through the exhaust port of the heat collecting hood. Use water absorption to exchange for the waste heat in the feeding bin and the heat collecting hood. The hot water after collecting the waste heat is transported to the heat storage container through the hot water outlet pipe, and the rich hot water resources are used for lithium bromide refrigeration or domestic hot water.

Description of the Drawings

[0010] The present invention will be further described in detail below with reference to the drawings.

[0011] Figure 1 is the front view of the present invention;

[0012] Figure 2 is the sectional view taken along Figure 1 F-F in

Specific Embodiments

[0013] Refer to Figure 1 、 2As shown in the figure, the waste heat recovery device for the feeding bin of the tower-type melting furnace includes a feeding bin, a furnace wellhead pry cover 2, and a heat collecting hood 3 connected to the top of the feeding bin. The feeding bin is formed by connecting a left wall panel 11, a right wall panel 12, a rear wall panel 13, and a connecting bottom plate 14. The furnace wellhead pry cover 2 is located above the connecting bottom plate 14. The improvement lies in: it also includes a water supply pipe 4, an upper connecting horizontal pipe 5a, a lower connecting horizontal pipe 6a arranged behind and above the furnace wellhead pry cover, and a serpentine heat exchange coil 7 arranged in the heat collecting hood. Left shunt risers 61 and right shunt risers 51 are symmetrically arranged near the left and right sides of the rear part of the furnace wellhead pry cover 2, and the left shunt riser 61 and the right shunt riser 51 are respectively close to the rear wall panel 13. Left heat exchange rows of pipes 63 and right heat exchange rows of pipes 53 are symmetrically arranged near the left wall panel 11 and the right wall panel 12. The water supply pipe 4 is respectively connected to the water inlet end (upper end) of the right shunt riser 51 and the water inlet end (right end) of the lower connecting horizontal pipe 6a. Among them, the water outlet end of the right shunt riser 51 is connected to the lower right collecting pipe 52. The right heat exchange rows of pipes 53 are respectively connected to the upper right collecting pipe 54 and the lower right collecting pipe 52. The water outlet end of the right heat exchange rows of pipes 53 is connected to the upper connecting horizontal pipe 5a. The water outlet end of the lower connecting horizontal pipe 6a is connected to the water inlet end of the left shunt riser 61. The water outlet end of the left shunt riser 61 is connected to the lower left collecting pipe 62. The left heat exchange rows of pipes 63 are respectively connected to the upper left collecting pipe 64 and the lower left collecting pipe 62. The water outlet end of the left heat exchange rows of pipes 63 and the water outlet end of the upper connecting horizontal pipe 5a jointly converge to the serpentine heat exchange coil 7. The hot water outlet end 70 of the serpentine heat exchange coil 7 flows to a heat storage container (not shown).

[0014] The water supply pipe 4, the water inlet end of the right shunt riser 51, and the water inlet end of the lower connecting horizontal pipe 6a are connected through a tee fitting (not shown); the water outlet end of the upper connecting horizontal pipe 5a and the water outlet end of the left heat exchange rows of pipes 63 are connected to the serpentine heat exchange coil 7 through a tee fitting.

[0015] The structure of the heat collecting hood 3 is a common design; the furnace wellhead pry cover 2 (well-known) can be lifted off and covered on the furnace wellhead of the tower-type melting furnace (not shown). The connecting bottom plate 14 communicates with the furnace body of the tower-type melting furnace; the transmission device for lifting the furnace wellhead pry cover 2 off and re-covering it after lifting is a conventional structure. The transmission device is arranged on the outer wall of the rear wall panel. The transmission device is a common design and only needs to achieve the required actions of the furnace wellhead pry cover 2. The transmission device partially extends into a large hole (not shown) opened on the rear wall panel 13 and is in transmission connection with the furnace wellhead pry cover 2. This large hole is the activity space of the transmission device.

[0016] Since the left shunt riser 61 and the right shunt riser 51 are respectively close to the rear wall panel 13, the setting of the left and right shunt risers can reduce the overflow of waste heat from the large hole in the rear wall panel.

[0017] The heat collecting hood 3 communicates with the feeding bin, and the temperature in the space of the heat collecting hood is higher than the temperature in the space of the feeding bin.

[0018] The serpentine heat exchange coil 7 is arranged in the internal space of the heat collection cover 3 in the depth direction.

[0019] The feeding bin is separately provided with a front lifting movable door 8 and a rear lifting movable door 9. The front lifting movable door 8 and the rear lifting movable door 9 are respectively driven by a sprocket 81 and a sprocket 91, and the front lifting movable door 8 and the rear lifting movable door 9 respectively move up and down along guide rails 82 and 92.

[0020] Specifically, the opposite side of the rear back plate 13 is an open side (doorway). The front lifting movable door 8 is arranged at this open side position, and the rear lifting movable door 9 is arranged near the rear back plate 13. When discharging materials, the lifting movable doors 8 and 9 are opened so that the hopper of the material truck can enter from this open side. The pry cover 2 of the furnace wellhead automatically lifts off the furnace wellhead, and the hopper pours the aluminum blocks towards the furnace wellhead. After the feeding is completed, the pry cover 2 of the furnace wellhead immediately automatically covers the furnace wellhead. After the hopper moves out of the open side, the lifting movable doors 8 and 9 automatically close, so as to avoid the heat in the feeding bin from overflowing and ensure the effective collection of waste heat.

[0021] The heat collection cover 3 is provided with an exhaust port 30 at its top for discharging harmful exhaust gases generated during the melting of aluminum blocks.

[0022] Description of the reference numerals in the figure:

[0023] Left wall plate 11, right wall plate 12, rear back plate 13, connecting bottom plate 14;

[0024] Pry cover 2 of the furnace wellhead;

[0025] Heat collection cover 3, exhaust port 30;

[0026] Water supply pipe 4;

[0027] Right shunt riser 51, lower right collecting pipe 52, right heat exchange row pipe 53, upper right collecting pipe 54, upper connecting horizontal pipe 5a;

[0028] Lower connecting horizontal pipe 6a, left shunt riser 61, lower left collecting pipe 62, left heat exchange row pipe 63, upper left collecting pipe 64;

[0029] Serpentine heat exchange coil 7, hot water outlet end 70;

[0030] Front lifting door 8, sprocket 81, guide rail 82;

[0031] Rear lifting door 9, sprocket 91, guide rail 92.

Claims

1. A waste heat recovery device for a feeding bin of a tower-type melting furnace, comprising a feeding bin, a furnace well cover plate, and a heat collecting cover connected to the top of the feeding bin. The feeding bin is formed by connecting a left wall panel, a right wall panel, a rear wall panel, and a connecting bottom plate. The furnace well cover plate is located above the connecting bottom plate, and the heat collecting cover is communicated with the feeding bin. The temperature in the space of the heat collecting cover is higher than the temperature in the space of the feeding bin. It is characterized in that: It also includes a water supply pipe, an upper connecting horizontal pipe located in the feeding bin, a lower connecting horizontal pipe arranged above the rear of the furnace well pry cover and located in the feeding bin, and a serpentine heat exchange coil arranged in the heat collection cover. On the left and right sides near the rear of the furnace well pry cover, a left shunt riser and a right shunt riser are symmetrically arranged, and the left shunt riser and the right shunt riser are respectively close to the rear back plate. Near the left wall panel and the right wall panel, a left heat exchange row pipe and a right heat exchange row pipe are symmetrically arranged. The heat exchange medium is water. The water supply pipe is respectively connected to the water inlet ends of the right shunt riser and the lower connecting horizontal pipe. Among them, the water outlet end of the right shunt riser is connected to the lower right collecting pipe, the right heat exchange row pipes are respectively connected to the upper right collecting pipe and the lower right collecting pipe, and the water outlet end of the right heat exchange row pipe is connected to the upper connecting horizontal pipe. The water outlet end of the lower connecting horizontal pipe is connected to the water inlet end of the left shunt riser, the water outlet end of the left shunt riser is connected to the lower left collecting pipe, and the left heat exchange row pipes are respectively connected to the upper left collecting pipe and the lower left collecting pipe. The water outlet ends of the left heat exchange row pipe and the upper connecting horizontal pipe jointly converge to the serpentine heat exchange coil, and the hot water outlet end of the serpentine heat exchange coil flows to the heat storage container. The upper left collecting pipe, the lower left collecting pipe, the upper right collecting pipe, and the lower right collecting pipe are all located in the feeding bin.

2. The waste heat recovery device for the charging bin of the tower-type melting furnace according to claim 1, characterized in that: The feeding bin is provided with a front lifting movable door and a rear lifting movable door respectively. The front and rear lifting movable doors are respectively driven by sprockets and move up and down along their respective guide rails.

3. The waste heat recovery device for the feeding bin of the tower-type melting furnace according to claim 1, wherein: The heat collection cover is provided with an exhaust port at its top end.

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