Industrial furnace waste heat recovery device

Abstract

The utility model discloses an industrial furnace waste heat recovery device, which relates to the technical field of industrial furnace flue gas utilization and comprises a butt joint pipe, the top of the butt joint pipe is communicated with a treatment tank, a water outlet pipe and a water inlet pipe fixedly penetrate through the side wall of the treatment tank, and heat conduction pipes are connected to the ends, close to the treatment tank, of the water outlet pipe and the water inlet pipe. An exhaust mechanism is arranged on the treatment tank on the side, away from the water outlet pipe and the water inlet pipe, of the heat conduction pipe, is used for exhausting gas in the treatment tank and comprises a partition plate arranged in the treatment tank, and an exhaust pipe is arranged at the bottom of the treatment tank on one side of the partition plate; a valve used for controlling the second opening of the exhaust pipe to be opened and closed is arranged on the second opening of the exhaust pipe, the third opening of the exhaust pipe is connected with a fan used for leading out gas in the exhaust pipe, and the output end of the fan is connected with a filtering mechanism. And the length of the heat conduction pipe in contact with the smoke is increased, the smoke waste heat utilization rate is increased, the used smoke can be filtered, and the emission requirement is better met.

Description

An industrial furnace waste heat recovery device Technical Field

[0001] This utility model relates to the field of industrial furnace flue gas utilization technology, specifically an industrial furnace waste heat recovery device. Background Technology

[0002] An industrial furnace is a thermal device used in industrial production to heat materials or workpieces using heat from fuel combustion or electrical energy conversion. Broadly speaking, a boiler is also a type of industrial furnace. The flue gas emitted by industrial furnaces during operation often carries a large amount of heat. Directly releasing this heat would not only cause high-temperature air pollution but also waste it. Therefore, in recent years, people have gradually begun to utilize the heat contained in the flue gas, most commonly for heating cold water.

[0003] In the prior art, utility model patent with announcement number CN220230113U provides an industrial furnace flue gas waste heat recovery mechanism, including a heat insulation cover, a connecting pipe at the bottom of the heat insulation cover, a waste heat recovery component fixedly connected to the connecting pipe inside the heat insulation cover, and guide pipes fixedly installed at the bottom of the heat insulation cover and on both sides of the connecting pipe; the waste heat recovery component includes an outer heat conduction cylinder, sealing ring plates fixedly installed at the top and bottom of the outer heat conduction cylinder, an inner heat conduction cylinder fixedly installed between the two sealing ring plates and on the inner side of the outer heat conduction cylinder, and a water inlet pipe and a drain pipe extending into the interior of the outer heat conduction cylinder are provided on the surface of the outer heat conduction cylinder.

[0004] The waste heat recovery mechanism for industrial furnace flue gas has a short contact length between the straight-through external heat pipe and the flue gas, which affects the utilization of waste heat and fails to filter the flue gas after use. Therefore, we propose an industrial furnace waste heat recovery device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an industrial furnace waste heat recovery device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an industrial furnace waste heat recovery device, comprising a connecting pipe, the top of which is connected to a treatment tank. An outlet pipe and an inlet pipe are fixedly inserted through the side wall of the treatment tank. A heat-conducting pipe is connected to one end of the outlet pipe and the inlet pipe near the treatment tank. An exhaust mechanism is provided on the side of the treatment tank away from the heat-conducting pipe and the outlet pipe. The exhaust mechanism is used to discharge gas from the treatment tank. The exhaust mechanism includes a partition installed inside the treatment tank. An exhaust pipe is provided at the bottom of the treatment tank on one side of the partition. A valve is provided on the second opening of the exhaust pipe for controlling the opening and closing of the second opening. A fan is connected to the third opening of the exhaust pipe for discharging gas from the exhaust pipe. The output end of the fan is connected to a filter mechanism.

[0007] Preferably, the filtration mechanism is used to filter the gas output by the fan.

[0008] Preferably, the filtration mechanism includes a pipe with one end connected to the output end of a ventilator, the free end of the pipe moving through the water storage tank, and an exhaust fan fixedly passing through the top of the water storage tank for discharging gas from the water storage tank.

[0009] Preferably, the top end of the heat-conducting pipe is connected to a water inlet pipe, the bottom end of the heat-conducting pipe is connected to a water outlet pipe, and the heat-conducting pipe is a spiral flat tube.

[0010] Preferably, the height of the partition is less than the height of the treatment tank, the bottom end of the partition is connected to the bottom of the treatment tank, the exhaust pipe is a three-way pipe, and the first opening of the exhaust pipe is connected to the treatment tank.

[0011] Preferably, both the valve and the blower are located outside the treatment tank, the blower is a duct blower, and the valve is located on the exhaust pipe between the treatment tank and the blower.

[0012] Preferably, the pipe has an L-shaped structure, the distance between the bottom end of the pipe and the bottom of the water storage tank is less than one-third of the pipe length, and the water level line of the water storage tank is below the exhaust fan.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Flue gas enters the treatment tank through the connecting pipe. The heat pipe absorbs the heat in the flue gas and transfers the heat to the cold water, thereby improving the utilization rate of the waste heat of the flue gas. Finally, the flue gas enters the space between the baffle and the treatment tank, and then enters the first opening of the exhaust pipe and is discharged through the second opening of the exhaust pipe. At the same time, the fan can be started to exhaust the flue gas in the exhaust pipe. The water inlet pipe introduces liquid into the heat pipe, and the water outlet pipe discharges the liquid in the heat pipe, which increases the contact length of the heat pipe with the flue gas and improves the utilization rate of the waste heat of the flue gas.

[0015] 2. The fan guides the flue gas from the exhaust pipe into the pipeline, and then into the liquid in the water storage tank. The liquid filters the flue gas and rises, then is discharged from the water storage tank by the exhaust fan. This process filters the flue gas after use, making it more compliant with emission requirements. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of this utility model;

[0017] Figure 2 is a schematic diagram of the exhaust mechanism in this utility model;

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

[0019] In the diagram: 1. Connecting pipe; 2. Treatment tank; 3. Outlet pipe; 4. Heat pipe; 5. Inlet pipe; 6. Exhaust mechanism; 61. Baffle plate; 62. Exhaust pipe; 63. Valve; 64. Fan; 7. Filter mechanism; 71. Pipeline; 72. Water storage tank; 73. Exhaust fan. Detailed Implementation

[0020] 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.

[0021] Please refer to Figures 1-3. An industrial furnace waste heat recovery device includes a connecting pipe 1, the bottom of which is connected to a flue, and the top of which is connected to a treatment tank 2. A water outlet pipe 3 and a water inlet pipe 5 are fixedly inserted through the side wall of the treatment tank 2. A heat conduction pipe 4 is connected to the end of the water outlet pipe 3 and the water inlet pipe 5 near the treatment tank 2. An exhaust mechanism 6 is provided on the side of the heat conduction pipe 4 away from the water outlet pipe 3 and the water inlet pipe 5 of the treatment tank 2. The exhaust mechanism 6 is used to discharge the gas inside the treatment tank 2. The exhaust mechanism 6 includes a baffle 61 provided inside the treatment tank 2. An exhaust pipe 62 is provided at the bottom of the treatment tank 2 on one side of the baffle 61. A second opening of the exhaust pipe 62 is provided with... There is a valve 63 for controlling the opening and closing of the second opening of the exhaust pipe 62. The third opening of the exhaust pipe 62 is connected to a fan 64 for discharging the gas inside the exhaust pipe 62. The top end of the heat conduction pipe 4 is connected to the water inlet pipe 5, and the bottom end of the heat conduction pipe 4 is connected to the water outlet pipe 3. The heat conduction pipe 4 is a spiral flat pipe. The height of the partition 61 is less than the height of the treatment tank 2. The bottom end of the partition 61 is connected to the bottom of the treatment tank 2. The exhaust pipe 62 is a three-way pipe. The first opening of the exhaust pipe 62 is connected to the treatment tank 2. The valve 63 and the fan 64 are both located outside the treatment tank 2. The fan 64 is a pipe fan. The valve 63 is on the exhaust pipe 62 between the treatment tank 2 and the fan 64.

[0022] Flue gas enters the treatment tank 2 through the connecting pipe 1. The heat pipe 4 absorbs the heat in the flue gas and transfers the heat to the cold water, thereby improving the utilization rate of the waste heat of the flue gas. Finally, the flue gas enters the space between the baffle 61 and the treatment tank 2, and then enters the first opening of the exhaust pipe 62 and is discharged through the second opening of the exhaust pipe 62. At the same time, the fan 64 can be started to discharge the flue gas in the exhaust pipe 62. The water inlet pipe 5 introduces liquid into the heat pipe 4, and the water outlet pipe 3 discharges the liquid from the heat pipe 4, which increases the contact length of the heat pipe 4 with the flue gas and improves the utilization rate of the waste heat of the flue gas.

[0023] The output end of the fan 64 is connected to the filter mechanism 7. The filter mechanism 7 is used to filter the gas output by the fan 64. The filter mechanism 7 includes a pipe 71 with one end connected to the output end of the fan 64. The free end of the pipe 71 moves through the water storage tank 72. An exhaust fan 73 for discharging the gas in the water storage tank 72 is fixedly inserted through the top of the water storage tank 72. The pipe 71 has an L-shaped structure. The distance between the bottom end of the pipe 71 and the bottom of the water storage tank 72 is less than one-third of the length of the pipe 71. The water level line of the water storage tank 72 is below the exhaust fan 73.

[0024] The fan 64 guides the flue gas in the exhaust pipe 62 into the pipe 71, and then into the liquid in the water storage tank 72 through the pipe 71. After the liquid filters the flue gas, the flue gas rises above the liquid and is discharged from the water storage tank 72 by the exhaust fan 73, so that the flue gas after use can be filtered to better meet the emission requirements.

[0025] Working Principle: In this invention, flue gas enters the treatment tank 2 through the connecting pipe 1. The heat-conducting pipe 4 absorbs the heat in the flue gas and transfers it to cold water, thereby improving the utilization rate of the waste heat of the flue gas. The flue gas finally enters the space between the baffle 61 and the treatment tank 2, and then enters the first opening of the exhaust pipe 62 and is discharged through the second opening of the exhaust pipe 62. At the same time, the fan 64 can be started to discharge the flue gas in the exhaust pipe 62. The water inlet pipe 5 introduces liquid into the heat-conducting pipe 4, and the water outlet pipe 3 discharges the liquid in the heat-conducting pipe 4, which increases the contact length of the heat-conducting pipe 4 with the flue gas and improves the utilization rate of the waste heat of the flue gas. The fan 64 guides the flue gas in the exhaust pipe 62 into the pipe 71, and then into the liquid in the water storage tank 72. After the liquid filters the flue gas, the flue gas rises to the top of the liquid and is discharged from the water storage tank 72 by the exhaust fan 73, so that the used flue gas can be filtered to better meet the emission requirements.

[0026] Heat pipes and fans are existing technologies and will not be described in detail here.

[0027] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An industrial furnace waste heat recovery device, comprising a connecting pipe (1), the top of which is connected to a treatment tank (2), characterized in that: The treatment tank (2) has an outlet pipe (3) and an inlet pipe (5) fixedly passing through its side wall. The outlet pipe (3) and the inlet pipe (5) are connected to a heat-conducting pipe (4) at the end near the treatment tank (2). The side of the treatment tank (2) away from the outlet pipe (3) and the inlet pipe (5) is provided with an exhaust mechanism (6). The exhaust mechanism (6) is used to exhaust the gas in the treatment tank (2). The exhaust mechanism (6) includes a partition (61) provided in the treatment tank (2). An exhaust pipe (62) is provided at the bottom of the treatment tank (2) on the side of the partition (61). A valve (63) is provided on the second opening of the exhaust pipe (62) for controlling the opening and closing of the second opening of the exhaust pipe (62). The third opening of the exhaust pipe (62) is connected to a fan (64) for exhausting the gas in the exhaust pipe (62). The output end of the fan (64) is connected to a filter mechanism (7).

2. The industrial furnace waste heat recovery device according to claim 1, characterized in that: The filtration mechanism (7) is used to filter the gas output by the fan (64).

3. The industrial furnace waste heat recovery device according to claim 2, characterized in that: The filtration mechanism (7) includes a pipe (71) with one end connected to the output end of a ventilator (64). The free end of the pipe (71) moves through the water storage tank (72). An exhaust fan (73) for discharging gas from the water storage tank (72) is fixedly inserted through the top of the water storage tank (72).

4. The industrial furnace waste heat recovery device according to claim 1, characterized in that: The top end of the heat pipe (4) is connected to the water inlet pipe (5), and the bottom end of the heat pipe (4) is connected to the water outlet pipe (3). The heat pipe (4) is a spiral flat pipe.

5. The industrial furnace waste heat recovery device according to claim 1, characterized in that: The height of the partition (61) is less than the height of the treatment tank (2). The bottom end of the partition (61) is connected to the bottom of the treatment tank (2). The exhaust pipe (62) is a three-way pipe. The first opening of the exhaust pipe (62) is connected to the treatment tank (2).

6. The industrial waste heat recovery device according to claim 1, characterized by: The valve (63) and the blower (64) are both located outside the treatment tank (2). The blower (64) is a duct blower. The valve (63) is located on the exhaust pipe (62) between the treatment tank (2) and the blower (64).

7. The industrial furnace waste heat recovery device according to claim 3, characterized in that: The pipe (71) has an L-shaped structure. The distance between the bottom of the pipe (71) and the bottom of the water tank (72) is less than one-third of the length of the pipe (71). The water level line of the water tank (72) is below the exhaust fan (73).

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