Waste heat recovery structure for electric furnace smelting

Abstract

The utility model discloses a waste heat recovery structure for electric furnace smelting, belongs to the field of waste heat recovery structures for electric furnace smelting, and aims to solve the problems that in the flue gas flowing process, flue gas is directly discharged into the environment, so that the retention time of the flue gas in a flue gas discharge pipe is too short, a part of heat is taken away when the flue gas is discharged, the flue gas waste heat recovery is incomplete, and the energy consumption is low. And waste is easily caused. Smoke can enter the smoke exhaust pipe, impurities in the smoke can be filtered through arranged filter cotton and a filter screen B, so that the impurities in the smoke can be reduced, the smoke can be resisted during flowing through multiple sets of partition plates, the flowing speed of the smoke is slowed down, and the smoke is prevented from entering the smoke exhaust pipe. According to the waste heat recovery device, the smoke exhaust pipe is arranged, so that the staying time of the smoke in the smoke exhaust pipe is prolonged, heat in the smoke can be better recovered, water in the waste heat recovery water tank can be heated through the heat conduction layer, heat in the smoke is recovered, and the waste heat recovery effect is better.

Description

Technical Field

[0001] The utility model relates to the field of waste heat recovery structures for electric furnace smelting, and more particularly to a waste heat recovery structure for electric furnace smelting. Background Art

[0002] Electric furnace smelting is a process that uses electricity to heat metal or other materials to a molten state. This process typically uses an electric arc as the heat source. Electric current creates an arc discharge between electrodes, generating high temperatures that melt the material within the furnace. A smoke pipe is located at the rear of the furnace to discharge the fumes generated during the smelting process.

[0003] The document with authorization announcement number CN212274025U proposes a low-temperature flue gas waste heat deep recovery furnace, including a furnace body, a smoke inlet pipe, and a waste heat recovery structure. The smoke inlet pipe is arranged through the furnace body, the waste heat recovery structure is arranged in the furnace body, the waste heat recovery structure is in contact with the outer wall of the smoke inlet pipe, and the waste heat recovery structure is used to recover the waste heat of the flue gas in the smoke inlet pipe; due to the use of the micro water pump, the volume of the flue gas waste heat recovery furnace is greatly reduced, and the micro water pump repeatedly pumps the water in the furnace body into the annular water storage tank, so that the water in the furnace body can be repeatedly heated and heated evenly, thereby improving the waste heat recovery efficiency of the waste heat recovery structure. However, in the above-mentioned document, although the waste heat in the flue gas can be recovered, during the flow of the flue gas, the flue gas is directly discharged into the environment, so that the flue gas stays in the exhaust pipe for too short a time, resulting in a part of the heat being taken away when discharged, thereby causing incomplete recovery of the flue gas waste heat, which is easy to cause waste. Utility Model Content

[0004] The purpose of the present utility model is to overcome the problem in the prior art that during the flow of flue gas, flue gas is directly discharged into the environment, so that the flue gas stays in the exhaust pipe for too short a time, resulting in a part of the heat being taken away when discharged, thereby causing incomplete recovery of the flue gas waste heat and easy waste. A waste heat recovery structure for electric furnace smelting is provided to make up for the above shortcomings and facilitate use.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0006] The utility model discloses a waste heat recovery structure for electric furnace smelting, comprising a smoke exhaust structure and a waste heat recovery mechanism arranged outside the smoke exhaust structure, the waste heat recovery mechanism comprising a waste heat recovery water tank and a water inlet pipe arranged at the upper end of the waste heat recovery water tank, the water inlet pipe is used to inject water, a blocking block is provided at the opening of the water inlet pipe, a heat conductive layer is provided on the inner wall of the waste heat recovery water tank, a drain pipe is further provided on the outside of the waste heat recovery water tank, a valve is provided on the outside of the drain pipe, and the drain pipe is used for draining water;

[0007] The smoke exhaust structure includes a smoke exhaust pipe and a guide structure arranged inside the smoke exhaust pipe. The guide structure includes a partition and a mounting block arranged at the edge of the partition. The mounting block is an arc-shaped structure. The mounting block contacts the inner wall of the smoke exhaust pipe and is fixed with bolts. A connecting rod is connected to the bottom wall of the partition. A ring is provided on the surface of the partition, and the ring is adapted to the connecting rod. The connecting rod is inserted into the ring and fixed with bolts. Multiple groups of partitions can be connected, and smoke enters the smoke exhaust pipe. The partitions arranged in conjunction can slow down the flow of smoke and increase the time the smoke stays inside the smoke exhaust pipe.

[0008] Preferably, the partition is in a hollow platform-shaped structure, and multiple groups of partitions are provided, which can slow down the flow speed of the smoke.

[0009] Preferably, the electric furnace body is provided at the lower end of the smoke exhaust pipe, and the smoke exhaust pipe is communicated with the interior of the electric furnace body for discharging smoke.

[0010] Preferably, filter cotton and filter mesh B are provided inside the smoke exhaust pipe, and the filter cotton and filter mesh B are located below the partition. The filter cotton and filter mesh B are used to filter impurities in the smoke.

[0011] Preferably, an anti-rust layer for preventing rust is evenly provided on the inner wall of the waste heat recovery water tank, and an insulation layer for heat preservation is provided on the outer wall of the waste heat recovery water tank to reduce heat loss.

[0012] Preferably, a mounting cover is threadedly connected to the upper opening of the smoke exhaust pipe, and a filter A is provided on the surface of the mounting cover, through which impurities in the environment can be blocked.

[0013] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0014] (1) The utility model provides a waste heat recovery structure for electric furnace smelting. The flue gas can enter the exhaust pipe, pass through multiple groups of partitions, and flow through the hollow space in the center of the partition. At this time, the use of multiple groups of partitions can make the flue gas encounter resistance when flowing, thereby slowing down the speed of the flue gas flow, making the flue gas stay in the exhaust pipe for a longer time, and can better recover the heat in the flue gas. The heat conductive layer can heat the water in the waste heat recovery water tank to achieve heat recovery in the flue gas, and the waste heat recovery effect is better. At the same time, the thermal insulation layer provided in conjunction with the waste heat recovery water tank can keep the water in the waste heat recovery water tank warm to prevent heat loss.

[0015] (2)The utility model discloses a kind of waste heat recovery structures for electric furnace smelting, operating personnel opens bung, cold water can be injected into waste heat recovery water tank, then bung is inserted into water pipe and closed, at this time, flue gas can be entered into exhaust pipe, and the impurities in flue gas can be filtered using the set filter cotton and filter screen B, so as to reduce the impurities in flue gas, to avoid pollution environment, while the impurities in flue gas can be avoided and attached on baffle, and the upper end opening of exhaust pipe is also threadedly installed with mounting cover and filter screen A, air in environment can be avoided and entered into exhaust pipe. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is overall structural diagram of the utility model;

[0017] Figure 2 It is exhaust structure schematic diagram of the utility model;

[0018] Figure 3 It is internal structure schematic diagram of the utility model's exhaust pipe;

[0019] Figure 4 It is guide structure schematic diagram of the utility model;

[0020] Figure 5 It is waste heat recovery water tank plane schematic diagram of the utility model.

[0021] In the drawing: 1, electric furnace body;2, exhaust structure;21, exhaust pipe;22, mounting cover;23, filter screen A;24, filter cotton;25, guide structure;251, baffle;252, mounting block;253, connecting rod;254, collar;26, filter screen B;3, waste heat recovery mechanism;31, waste heat recovery water tank;311, heat preservation layer;312, rust prevention layer;32, water inlet pipe;33, bung;34, heat conduction layer;35, drain pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings.

[0024] In combination with Figure 1The utility model provides a waste heat recovery structure for electric furnace smelting, including a smoke exhaust structure 2 and a waste heat recovery mechanism 3 arranged outside the smoke exhaust structure 2. The waste heat recovery mechanism 3 includes a waste heat recovery water tank 31 and a water inlet pipe 32 arranged at the upper end of the waste heat recovery water tank 31. The water inlet pipe 32 is used to inject water. A blocking block 33 is provided at the opening of the water inlet pipe 32. A heat conductive layer 34 is provided on the inner wall of the waste heat recovery water tank 31. A drain pipe 35 is also provided on the outside of the waste heat recovery water tank 31. A valve is provided on the outside of the drain pipe 35. The drain pipe 35 is used for drainage.

[0025] The present invention will be further described below with reference to the embodiments.

[0026] Combine Figure 2-5 The smoke exhaust structure 2 includes a smoke exhaust pipe 21 and a guide structure 25 arranged inside the smoke exhaust pipe 21. The guide structure 25 includes a partition 251 and a mounting block 252 arranged at the edge of the partition 251. The mounting block 252 is an arc-shaped structure. The mounting block 252 contacts the inner wall of the smoke exhaust pipe 21 and is fixed with bolts. A connecting rod 253 is connected to the bottom wall of the partition 251. A collar 254 is provided on the surface of the partition 251, and the collar 254 is adapted to the connecting rod 253. The connecting rod 253 is inserted into the collar 254 and fixed with bolts. Multiple groups of partitions 251 can be connected, and the smoke enters the smoke exhaust pipe 21. The partition 251 provided in conjunction can slow down the speed of the smoke flow and increase the time the smoke stays inside the smoke exhaust pipe 21. The water in the waste heat recovery tank 31 can be heated through the heat conductive layer 34, which is beneficial to recovering the heat in the smoke, and the waste heat recovery effect is better. The partition 251 is a hollow platform-shaped structure, and there are multiple groups of partitions 251, which can slow down the flow rate of flue gas. The lower end of the exhaust pipe 21 is provided with the electric furnace body 1. The exhaust pipe 21 is connected to the interior of the electric furnace body 1 for discharging flue gas. The interior of the exhaust pipe 21 is provided with filter cotton 24 and filter screen B26. The filter cotton 24 and filter screen B26 are located below the partition 251. The filter cotton 24 and filter screen B26 are both used to filter impurities in the flue gas. The inner wall of the waste heat recovery water tank 31 is evenly provided with an anti-rust layer 312 for preventing rust, and the outer wall of the waste heat recovery water tank 31 is provided with an insulation layer 311 for heat preservation to reduce heat loss. The upper end opening of the exhaust pipe 21 is threadedly connected to a mounting cover 22, and the surface of the mounting cover 22 is provided with a filter screen A23. The filter screen A23 can block impurities in the environment to prevent impurities in the environment from entering the exhaust pipe 21.

[0027] In this embodiment, the operator opens the block 33 and can inject cold water into the waste heat recovery water tank 31, and then inserts the block 33 into the water inlet pipe 32 to seal it. At this time, the smoke can enter the exhaust pipe 21, and the filter cotton 24 and the filter screen B26 provided can be used to filter the impurities in the smoke, thereby reducing the impurities in the smoke to avoid polluting the environment. At the same time, it can prevent the impurities in the smoke from adhering to the partition 251, and the upper end opening of the exhaust pipe 21 is also threadedly installed with a mounting cover 22 and a filter screen A23, which can prevent the air in the environment from entering the exhaust pipe 21. At this time The flue gas continues to flow and can pass through multiple groups of partitions 251 and flow through the hollow space in the center of the partition 251. At this time, the use of multiple groups of partitions 251 can make the flue gas encounter resistance during flow, thereby slowing down the flow of the flue gas and making the flue gas stay longer in the exhaust pipe 21, so that the heat in the flue gas can be better recovered, and the water in the waste heat recovery tank 31 can be heated through the heat conductive layer 34 to achieve heat recovery in the flue gas, and the waste heat recovery effect is better. At the same time, the thermal insulation layer 311 provided in conjunction with the flue gas can keep the water in the waste heat recovery tank 31 warm to prevent heat loss.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery structure for electric furnace smelting, comprising a smoke exhaust structure (2) and a waste heat recovery mechanism (3) arranged outside the smoke exhaust structure (2), characterized in that: The waste heat recovery mechanism (3) comprises a waste heat recovery water tank (31) and a water inlet pipe (32) arranged at the upper end of the waste heat recovery water tank (31); the water inlet pipe (32) is used for injecting water; a blocking block (33) is provided at the opening of the water inlet pipe (32); a heat conducting layer (34) is provided on the inner wall of the waste heat recovery water tank (31); and a drain pipe (35) is further provided on the outer side of the waste heat recovery water tank (31); The smoke exhaust structure (2) comprises a smoke exhaust pipe (21) and a guide structure (25) arranged inside the smoke exhaust pipe (21); the guide structure (25) comprises a partition (251) and a mounting block (252) arranged at the edge of the partition (251); the mounting block (252) is an arc-shaped structure; the mounting block (252) contacts the inner wall of the smoke exhaust pipe (21) and is fixed by bolts; a connecting rod (253) is connected to the bottom wall of the partition (251); a collar (254) is arranged on the surface of the partition (251), and the collar (254) is adapted to the connecting rod (253); the connecting rod (253) is inserted into the collar (254) and fixed with bolts; multiple groups of partitions (251) can be connected, and smoke enters the smoke exhaust pipe (21); the partition (251) arranged in conjunction with the arrangement can slow down the speed of smoke flow.

2. The waste heat recovery structure for electric furnace smelting according to claim 1, characterized in that: The partition (251) is in a hollow platform-shaped structure, and multiple groups of partitions (251) are provided, which can slow down the flow speed of the smoke.

3. The waste heat recovery structure for electric furnace smelting according to claim 1, characterized in that: The electric furnace body (1) is provided at the lower end of the smoke exhaust pipe (21), and the smoke exhaust pipe (21) is communicated with the interior of the electric furnace body (1).

4. The waste heat recovery structure for electric furnace smelting according to claim 3, characterized in that: The smoke exhaust pipe (21) is provided with filter cotton (24) and filter screen B (26). The filter cotton (24) and filter screen B (26) are located below the partition (251). The filter cotton (24) and filter screen B (26) are used to filter impurities in the smoke.

5. The waste heat recovery structure for electric furnace smelting according to claim 1, characterized in that: An anti-rust layer (312) for preventing rust is evenly provided on the inner wall of the waste heat recovery water tank (31), and an insulation layer (311) for heat preservation is provided on the outer wall of the waste heat recovery water tank (31).

6. The waste heat recovery structure for electric furnace smelting according to claim 4, characterized in that: The upper opening of the smoke exhaust pipe (21) is threadedly connected to a mounting cover (22), and a filter screen A (23) is provided on the surface of the mounting cover (22), which can block impurities in the environment.

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