Waste heat recovery device of preheating furnace

Abstract

The utility model relates to the field of waste heat recovery of preheating furnaces, and discloses a waste heat recovery device of a preheating furnace, which comprises a preheating furnace body, a smoke exhaust pipe is arranged at the top of the preheating furnace body, a cleaning mechanism is arranged at the top of the smoke exhaust pipe, a shell is arranged on one side of the preheating furnace body, one side of the shell is communicated with a connecting pipe, and the other side of the shell is communicated with the connecting pipe. The dust collector has the advantages that the cleaning mechanism is arranged, the output end of the motor drives the rotating rod to rotate, the cleaning brush at the bottom of the rotating rod is in direct contact with the filter screen, accumulated dust is removed through rotating motion, and the dust collector is convenient to clean. The workload of manual maintenance is reduced, the cleaning efficiency is improved, the automatic cleaning process ensures that the filter screen is kept clean, the situation that the heat exchange efficiency is reduced due to dust deposition is avoided, and in addition, corrosion of the filter screen can be prevented through regular cleaning.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery of preheating furnaces, and more particularly to a waste heat recovery device for preheating furnaces. Background Technology

[0002] Preheating furnaces, as an important industrial heating device, are widely used in industries such as steel, chemicals, and non-ferrous metals. Their main function is to heat raw materials or semi-finished products to a certain temperature to meet the requirements of subsequent processing. With rising energy costs and increasing environmental awareness, how to improve the energy efficiency of preheating furnaces, reduce energy consumption, and lower emissions has become a key focus both inside and outside the industry. In recent years, waste heat recovery technology has developed rapidly as one of the effective means of energy conservation and emission reduction.

[0003] A search revealed a Chinese patent disclosure: a waste heat recovery device for a trolley-type gas preheating furnace (Authorization Announcement No.: CN210638538U). This utility model discloses a waste heat recovery device for a trolley-type gas preheating furnace, including a base, a housing fixedly connected to the upper end of the base, an inlet mechanism fixedly connected to one side of the housing, an outlet mechanism fixedly connected to the side of the housing away from the inlet mechanism, and a recovery mechanism fixedly connected between the inlet mechanism and the outlet mechanism. This waste heat recovery device for a trolley-type gas preheating furnace controls the waste heat gas to enter through the first flare in the inlet mechanism, reaching the first sealing layer, and then being insulated by the first insulation material before reaching the recovery mechanism. The heat is then dissipated and reused through heat pipes and copper fins, avoiding waste. Finally, the ineffective gas is discharged from the outlet through the second sealing layer in the outlet mechanism. Multiple sealing layers prevent waste heat gas from leaking out of the device, and the multiple heat pipes further enhance the waste heat recovery effect.

[0004] However, in the actual application of this patented technology, in the traditional preheating furnace design, the high-temperature flue gas generated by combustion is usually directly discharged into the atmosphere. This not only leads to a large amount of heat loss, but also increases environmental pollution. Although a filter screen is installed in the flue during flue gas discharge, the filter screen is in a closed space, which makes cleaning inconvenient and affects the effect of waste heat recovery. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a waste heat recovery device for a preheating furnace.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery device for a preheating furnace, comprising a preheating furnace body, an exhaust pipe provided at the top of the preheating furnace body, a filter screen provided inside the exhaust pipe, a cleaning mechanism provided at the top of the exhaust pipe, a shell provided on one side of the preheating furnace body, a connecting pipe connected to one side of the shell, and a circulation mechanism provided on one side of the shell.

[0007] The cleaning mechanism includes a motor, a conveying pipe, a rotating rod, and a cleaning brush. The bottom of the conveying pipe is connected to the exhaust pipe. The motor is located at the top of the conveying pipe, and the output end of the motor is fixedly connected to the rotating rod. The cleaning brush is located at the bottom of the rotating rod, and the rotating rod is located inside the conveying pipe.

[0008] Preferably, the circulation mechanism includes a water pump, a sleeve, a water delivery pipe, a water storage tank, and a sealing ring. The water storage tank is disposed inside the housing. One side of the delivery pipe is connected to the water pump, and the other side of the delivery pipe extends through the housing into the water storage tank. The delivery sleeve is disposed on the surface of the connecting pipe, and one side of the sleeve is connected to the water pump. The sealing ring is sleeved on the surface of the connecting pipe, and the surface of the sealing ring is in contact with the sleeve.

[0009] Preferably, a fixing block is fixedly connected to the surface of the flue pipe, and a bolt is provided inside the fixing block, with the bottom of the bolt extending into the interior of the preheating furnace body.

[0010] Preferably, a drain pipe is connected to one side of the housing, and one side of the drain pipe extends into the interior of the water storage tank. A solenoid valve is fitted onto the surface of the drain pipe.

[0011] Preferably, a positioning frame is fixedly connected to the top of the conveying pipe, and the motor is fixed inside the positioning frame.

[0012] Preferably, a pad is fixedly connected to one side of the housing, and the water pump is located on top of the pad.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, by setting up a cleaning mechanism, the motor output end drives the rotating rod to rotate, and the cleaning brush at the bottom of the rotating rod directly contacts the filter screen. The dust is removed by the rotational motion, which reduces the workload of manual maintenance and improves cleaning efficiency. The automated cleaning process ensures that the filter screen is kept clean and avoids the decrease in heat exchange efficiency caused by dust accumulation. In addition, regular cleaning can also prevent the corrosion of the filter screen.

[0015] 2. In this utility model, by setting up a circulation mechanism, the water pump transfers the water inside the water storage tank to the water delivery pipe, and then to the sleeve. Since the sleeve is fitted on the connecting pipe, the heat from the flue pipe is transferred to the inside of the connecting pipe through the delivery pipe, which can heat the water inside the sleeve. The water is then transferred to the inside of the water storage tank, which can achieve the circulation function. The water storage tank, as a heat energy storage device, can store the heat recovered from the flue pipe. The sealing ring can seal the connection pipe and the sleeve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the waste heat recovery device of the preheating furnace in this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the shell in this utility model.

[0018] Figure 3 This is a schematic diagram of the circulation mechanism in this utility model.

[0019] Figure 4 This is a schematic diagram of the conveying pipe and the exhaust pipe in this utility model.

[0020] Figure 5 This is a schematic diagram of the cleaning mechanism in this utility model.

[0021] Legend:

[0022] 1. Preheating furnace body; 2. Exhaust pipe; 3. Shell; 4. Connecting pipe; 5. Cleaning mechanism; 501. Motor; 502. Conveying pipe; 503. Rotating rod; 504. Cleaning brush; 6. Circulation mechanism; 601. Water pump; 602. Sleeve; 603. Water supply pipe; 604. Water storage tank; 605. Sealing ring; 7. Filter screen; 8. Fixing block; 9. Bolt; 10. Drain pipe; 11. Solenoid valve; 12. Positioning frame; 13. Pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1-5An embodiment of this utility model is provided: a waste heat recovery device for a preheating furnace, including a preheating furnace body 1, a flue pipe 2 is provided on the top of the preheating furnace body 1, a filter screen 7 is provided inside the flue pipe 2, a cleaning mechanism 5 is provided on the top of the flue pipe 2, a shell 3 is provided on one side of the preheating furnace body 1, a connecting pipe 4 is connected to one side of the shell 3, and a circulation mechanism 6 is provided on one side of the shell 3.

[0025] The cleaning mechanism 5 includes a motor 501, a conveying pipe 502, a rotating rod 503, and a cleaning brush 504. The bottom of the conveying pipe 502 is connected to the exhaust pipe 2. The motor 501 is located at the top of the conveying pipe 502. The output end of the motor 501 is fixedly connected to the rotating rod 503. The cleaning brush 504 is located at the bottom of the rotating rod 503. The rotating rod 503 is located inside the conveying pipe 502.

[0026] Through the above technical solution, by setting up a cleaning mechanism 5, the output end of the motor 501 drives the rotating rod 503 to rotate, and the cleaning brush 504 at the bottom of the rotating rod 503 directly contacts the filter screen 7. The dust is removed by the rotational motion, which reduces the workload of manual maintenance and improves the cleaning efficiency. The automated cleaning process ensures that the filter screen 7 is kept clean and avoids the decrease in heat exchange efficiency caused by dust accumulation. In addition, regular cleaning can also prevent the corrosion of the filter screen 7.

[0027] Specifically, the circulation mechanism 6 includes a water pump 601, a sleeve 602, a water delivery pipe 603, and a water storage tank 604. The water storage tank 604 is located inside the housing 3. One side of the delivery pipe 502 is connected to the water pump 601, and the other side of the delivery pipe 502 extends through the housing 3 into the water storage tank 604. The delivery sleeve 602 is located on the surface of the connecting pipe 4, and one side of the sleeve 602 is connected to the water pump 601.

[0028] Through the above technical solution, by setting up the circulation mechanism 6, the water pump 601 transfers the water inside the water storage tank 604 to the water delivery pipe 603, and then to the sleeve 602. Since the sleeve 602 is fitted on the connecting pipe 4, the heat from the exhaust pipe 2 is transferred to the inside of the connecting pipe 4 through the delivery pipe 502, which can heat the water inside the sleeve 602. The water is then transferred to the inside of the water storage tank 604, which can achieve the circulation function. The water storage tank 604, as a heat energy storage device, can store the heat recovered from the exhaust pipe 2. The sealing ring 605 can seal the connection between the connecting pipe 4 and the sleeve 602.

[0029] Specifically, a fixing block 8 is fixedly connected to the surface of the flue pipe 2, and a bolt 9 is installed inside the fixing block 8. The bottom of the bolt 9 extends into the interior of the preheating furnace body 1.

[0030] By using the above technical solution, by setting a fixing block 8 and a bolt 9, and extending the bolt 9 through the fixing block 8 into the interior of the preheating furnace body 1, the exhaust pipe 2 can be fixed.

[0031] Specifically, a drain pipe 10 is connected to one side of the housing 3, and one side of the drain pipe 10 extends into the interior of the water storage tank 604. A solenoid valve 11 is fitted on the surface of the drain pipe 10.

[0032] The above technical solution involves setting up a drain pipe 10 and a solenoid valve 11. Opening the solenoid valve 11 allows water to be drained from the water storage tank 604.

[0033] Specifically, a positioning frame 12 is fixedly connected to the top of the conveying pipe 502, and the motor 501 is fixed inside the positioning frame 12.

[0034] Through the above technical solution, by setting up the positioning frame 12, the motor 501 is installed inside the positioning frame 12, which can play a role in fixing it.

[0035] Specifically, a pad 13 is fixedly connected to one side of the housing 3, and a water pump 601 is installed on top of the pad 13.

[0036] Through the above technical solution, by setting the pad 13, the water pump 601 is installed on the pad 13, which can provide support for the water pump 601.

[0037] Working principle: During operation, flue gas in the preheating furnace body 1 passes through the exhaust pipe 2 and filter screen 7, and is conveyed into the inside of the conveying pipe 502. The output end of the motor 501 drives the rotating rod 503 to rotate, and the cleaning brush 504 at the bottom of the rotating rod 503 directly contacts the filter screen 7, removing accumulated ash through rotation. This reduces the workload of manual maintenance and improves cleaning efficiency. The automated cleaning process ensures that the filter screen 7 remains clean, avoiding a decrease in heat exchange efficiency due to ash accumulation. The flue gas is then transferred to the connecting pipe 4 through the conveying pipe 502, due to the sleeve 6... 02 is fitted onto the connecting pipe 4. The heat from the exhaust pipe 2 is transferred to the inside of the connecting pipe 4 through the conveying pipe 502, which can heat the water inside the sleeve 602. The water is then transferred to the inside of the water storage tank 604. The water pump 601 transfers the water inside the water storage tank 604 to the water supply pipe 603, and then to the sleeve 602, which can achieve a circulation function. The water storage tank 604, as a heat energy storage device, can store the heat recovered from the exhaust pipe 2. The water pump 601 is installed on the pad 13, which can support the water pump 601.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for a preheating furnace, comprising a preheating furnace body (1), characterized in that: The top of the preheating furnace body (1) is provided with a flue pipe (2), the inside of the flue pipe (2) is provided with a filter screen (7), the top of the flue pipe (2) is provided with a cleaning mechanism (5), a shell (3) is provided on one side of the preheating furnace body (1), a connecting pipe (4) is connected to one side of the shell (3), and a circulation mechanism (6) is provided on one side of the shell (3). The cleaning mechanism (5) includes a motor (501), a conveying pipe (502), a rotating rod (503), and a cleaning brush (504). The bottom of the conveying pipe (502) is connected to the exhaust pipe (2). The motor (501) is located at the top of the conveying pipe (502). The output end of the motor (501) is fixedly connected to the rotating rod (503). The cleaning brush (504) is located at the bottom of the rotating rod (503). The rotating rod (503) is located inside the conveying pipe (502).

2. The waste heat recovery device for a preheating furnace according to claim 1, characterized in that: The circulation mechanism (6) includes a water pump (601), a sleeve (602), a water delivery pipe (603), a water storage tank (604), and a sealing ring (605). The water storage tank (604) is located inside the housing (3). One side of the delivery pipe (502) is connected to the water pump (601), and the other side of the delivery pipe (502) extends through the housing (3) to the inside of the water storage tank (604). The delivery sleeve (602) is located on the surface of the connecting pipe (4). One side of the sleeve (602) is connected to the water pump (601). The sealing ring (605) is sleeved on the surface of the connecting pipe (4), and the surface of the sealing ring (605) is in contact with the sleeve (602).

3. The waste heat recovery device for a preheating furnace according to claim 1, characterized in that: The surface of the flue pipe (2) is fixedly connected to a fixing block (8), and a bolt (9) is provided inside the fixing block (8). The bottom of the bolt (9) extends into the interior of the preheating furnace body (1).

4. The waste heat recovery device for a preheating furnace according to claim 1, characterized in that: A drain pipe (10) is connected to one side of the housing (3), and one side of the drain pipe (10) extends into the interior of the water storage tank (604). A solenoid valve (11) is fitted on the surface of the drain pipe (10).

5. The waste heat recovery device for a preheating furnace according to claim 1, characterized in that: The top of the delivery pipe (502) is fixedly connected to a positioning frame (12), and the motor (501) is fixed inside the positioning frame (12).

6. The waste heat recovery device for a preheating furnace according to claim 2, characterized in that: A pad (13) is fixedly connected to one side of the housing (3), and the water pump (601) is located on the top of the pad (13).

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