Smoke dust purification device of fuel gas heating furnace

Abstract

The utility model relates to the technical field of machining equipment, in particular to a gas heating furnace smoke purification device which comprises a gas furnace, a first exhaust pipe used for exhausting smoke is arranged on the gas furnace, a preheating box is arranged on one side of the gas furnace, and a heat preservation inner container is arranged in the preheating box. A static pressure cavity for gas circulation is formed between the inner wall of the preheating box and the outer wall of the heat preservation inner container, a plurality of ventilation gaps are formed in the heat preservation inner container, and the inner space of the heat preservation inner container communicates with the static pressure cavity through the ventilation gaps. According to the embodiment of the invention, the flue gas flowing path is prolonged by changing the mode of the flue gas flow channel, so that the dynamic pressure of the flue gas is continuously lost in the flowing process, the working temperature of the adsorption assembly is relatively low, the born dynamic pressure is relatively low, and the overall service life of the device is remarkably prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of machining equipment, and in particular to a smoke purification device for a gas heating furnace. Background Art

[0002] In the field of machining, gas heating furnace is a common heat treatment process equipment. Its flue gas and smoke have large heat and kinetic energy. The flue gas with high heat and dynamic pressure carries smoke with large kinetic energy and frequently impacts the purification device, which will cause the purification device to be in a harsh working environment for a long time, reducing the service life of the purification actuator components of the purification device. Summary of the invention

[0003] In response to the shortcomings of the prior art, the present application provides a gas heating furnace smoke purification device. The embodiment of the present application extends the distance of smoke flow by changing the smoke and smoke flow paths, so that the dynamic pressure of the smoke is continuously lost during the flow, and the kinetic energy of the smoke entrained in the smoke is continuously reduced, thereby making the working temperature of the adsorption component lower and the dynamic pressure it withstands lower, thereby significantly improving the overall service life of the device.

[0004] The above application objectives of this application are achieved through the following technical solutions:

[0005] A gas heating furnace smoke purification device comprises a gas furnace, a first exhaust pipe for exhausting smoke is arranged on the gas furnace, a preheating box is arranged on one side of the gas furnace, a heat preservation inner tank is arranged in the preheating box, a static pressure cavity for gas circulation is provided between the inner wall of the preheating box and the outer wall of the heat preservation inner tank, a plurality of ventilation gaps are provided on the heat preservation inner tank, and the internal space of the heat preservation inner tank is connected with the static pressure cavity through the ventilation gaps;

[0006] One end of the first exhaust pipe away from the gas furnace is inserted into the heat-insulating inner tank, an openable closed door and a second exhaust pipe are provided on the preheating box, an air inlet of the second exhaust pipe is located in the static pressure chamber, an air outlet of the second exhaust pipe is located outside the preheating box, an adsorption component for purifying smoke in the flue gas is provided in the middle of the second exhaust pipe, and the inner diameter of the second exhaust pipe is larger than the inner diameter of the first exhaust pipe.

[0007] Optionally, the closed door on the preheating box is located at an end of the preheating box away from the first exhaust pipe, and the second exhaust pipe is close to the closed door.

[0008] Optionally, a plurality of linearly arranged wind shields are provided on the inner wall of the preheating box, and an ash removal trough is formed between two adjacent wind shields.

[0009] Optionally, when the flow direction of the gas in the static pressure chamber is taken as the positive direction, the normal vectors of the sides of two adjacent windshields installed on the same inner wall of the preheating box that are close to each other are perpendicular to the positive direction.

[0010] Optionally, a baffle is arranged between two adjacent windshields. A plurality of protrusions are arranged on the baffle, and the plurality of protrusions on the baffle are linearly arranged.

[0011] Optionally, the side of the protrusion on the baffle close to the ventilation gap is an arc surface.

[0012] In summary, the present application has the following beneficial technical effects:

[0013] In the embodiment of the present application, by changing the flue gas flow path, the flow path of the flue gas is extended, so that the dynamic pressure of the flue gas is continuously lost during the flow process, and the kinetic energy of the soot entrained in the flue gas is continuously reduced. As a result, the working temperature of the adsorption assembly is relatively low and the dynamic pressure it bears is relatively low, significantly improving the overall service life of the device. Description of the Drawings

[0014] Figure 1 is a schematic cross-sectional view of an embodiment of the present application;

[0015] Figure 2 is a schematic cross-sectional view of a preheating box in an embodiment of the present application;

[0016] Figure 3 is a schematic cross-sectional view of a preheating box in an embodiment of the present application;

[0017] Figure 4 is a schematic view of a baffle in an embodiment of the present application.

[0018] Reference numerals: 10, gas furnace; 11, first exhaust pipe;

[0019] 20, preheating box; 21, heat preservation inner liner; 22, static pressure chamber; 23, ventilation gap; 24, windshield; 25, ash removal trough; 26, baffle; 27, protrusion;

[0020] 30, second exhaust pipe; 31, adsorption assembly. Detailed Embodiments

[0021] The following further describes the present application in detail with reference to the drawings.

[0022] The embodiment of the present application provides a gas heating furnace soot purification device. Referring to Figure 1 and Figure 2 , it includes a gas furnace 10 that uses gas as a heat source and is used to heat workpieces. A preheating box 20 is arranged on one side of the gas furnace 10. A heat preservation inner liner 21 is arranged in the preheating box 20, and workpieces to be preheated can be placed in the heat preservation inner liner 21;

[0023] There is a static pressure chamber 22 for gas circulation between the inner wall of the preheating chamber 20 and the outer wall of the heat preservation inner liner 21. There are several ventilation gaps 23 on the heat preservation inner liner 21. When the air pressure inside the heat preservation inner liner 21 exceeds the air pressure in the static pressure chamber 22, the gas inside the heat preservation inner liner 21 can enter the static pressure chamber 22 through the ventilation gaps 23, that is, the internal space of the heat preservation inner liner 21 is connected to the static pressure chamber 22 through the ventilation gaps 23;

[0024] A first exhaust pipe 11 is provided on the gas furnace 10. One end of the first exhaust pipe 11 away from the gas furnace 10 is inserted into the heat preservation inner liner 21. The flue gas tail gas of the gas furnace 10 directly enters the inside of the heat preservation inner liner 21 through the first exhaust pipe 11. An openable closing door and a second exhaust pipe 30 are provided on the preheating chamber 20. The closing door is arranged on one side of the preheating chamber 20, and the position of the closing door relative to the preheating chamber 20 is adjustable. The closing door is used for the operator to place the workpiece and then close the preheating chamber 20 and the heat preservation inner liner 21;

[0025] The inlet of the second exhaust pipe 30 is located in the static pressure chamber 22. The inner diameter of the second exhaust pipe 30 is larger than the inner diameter of the first exhaust pipe 11. The outlet of the second exhaust pipe 30 is located outside the preheating chamber 20. An adsorption component 31 for purifying the flue gas is arranged in the middle of the second exhaust pipe 30. The high-temperature flue gas tail gas inside the gas furnace 10 enters the heat preservation inner liner 21 through the first exhaust pipe 11, then enters the static pressure chamber 22 through the ventilation gaps 23, and finally is discharged through the second exhaust pipe 30.

[0026] The following is a further introduction in combination with specific usage scenarios.

[0027] During use, the operator puts the workpiece that needs to be heated before heat treatment into the gas furnace 10, and then oxygen and gas are introduced to ignite and heat the workpiece. As the gas and oxygen are continuously introduced, the high-temperature flue gas tail gas generated by the combustion of the gas needs to be discharged from the first exhaust pipe 11 to maintain the stable air pressure and heating operation in the gas furnace 10;

[0028] The way the gas in the gas furnace 10 is discharged is relatively single, only discharged from the first exhaust pipe 11. The flow direction of the flue gas is relatively consistent, the dynamic pressure of the flue gas is relatively high, and the kinetic energy and temperature of the entrained soot are also relatively high. After the high-temperature flue gas in the first exhaust pipe 11 enters the heat preservation inner liner 21, the heat in the high-temperature flue gas and soot makes the workpiece in the heat preservation inner liner 21 heat up rapidly until the temperature of the workpiece tends to be the same as the temperature of the high-temperature flue gas and soot. This enables the workpiece to have a certain temperature before entering the gas furnace 10, saving energy and reducing the temperature of the flue gas and soot.

[0029] During the process of discharging high-temperature flue gas and soot into the heat-insulating inner container 21, the air pressure inside the heat-insulating inner container 21 continuously rises. There is a tendency for the high-temperature flue gas to carry soot into the static pressure chamber 22 through the ventilation gaps 23. The high-temperature flue gas inside the heat-insulating inner container 21 passes through a number of ventilation gaps 23, and the number of ventilation gaps 23 is distributed around the heat-insulating inner container 21. This causes the direction of escape of the high-temperature gas leaving the heat-insulating inner container 21 not to remain consistent, reducing the dynamic pressure of a part of the high-temperature gas. During this process, the soot carried by the flue gas will also impact the physical body, thereby attenuating the kinetic energy of the soot.

[0030] Looking again at the process of high-temperature and soot gas passing through the ventilation gaps 23 and leaving the heat-insulating inner container 21, the ventilation gaps 23, as the channels for the high-temperature gas inside the heat-insulating inner container 21 to leave the heat-insulating inner container 21, not only provide channels for the high-temperature gas but also restrict the flow velocity direction of the high-temperature gas and soot leaving the heat-insulating inner container 21. This causes the gas and soot leaving the high-temperature inner container to impact the inner wall of the preheating box 20 during the process of movement. Impacting the inner wall of the preheating box 20 further disrupts the direction of escape of the gas, thereby reducing the dynamic pressure of a part of the high-temperature gas and the kinetic energy of the soot.

[0031] The cross-sectional area of the static pressure chamber 22 is larger than the cross-sectional area of the first exhaust pipe 11. The flow rate of the combined branch airflows discharged from a number of ventilation gaps 23 and gathered in the static pressure chamber 22 will also be less than the flow rate of the airflows discharged from the first exhaust pipe 11, causing the flow rate of the high-temperature gas to slow down and reducing the dynamic pressure of a part of the high-temperature gas.

[0032] In this way, after the gas with reduced dynamic pressure enters the second exhaust pipe 30 whose inner diameter is larger than the inner diameter of the first exhaust pipe 11, the adsorption assembly 31 bears less gas dynamic pressure, less heat, and less kinetic energy from the impact of the soot, improving the working environment of the adsorption assembly 31 and extending the overall service life of the device.

[0033] Generally speaking, the embodiment of the present application extends the flow path of the flue gas and soot by changing the flue gas flow path, causing the dynamic pressure of the flue gas to continuously decrease and the kinetic energy of the soot to continuously attenuate during the flow process. As a result, the working temperature of the adsorption assembly 31 is relatively low and the dynamic pressure it bears is relatively low, significantly improving the overall service life of the device.

[0034] As a feasible specific implementation manner of the embodiment of the present application, the closing door on the preheating box 20 is located at one end of the preheating box 20 away from the first exhaust pipe 11, and the second exhaust pipe 30 is close to the closing door. In this way, the overall movement path of the flue gas inside the preheating box 20 is extended, effectively reducing the dynamic pressure of the high-temperature gas and the kinetic energy of the soot, improving the working environment of the adsorption assembly 31, and extending the overall service life of the device.

[0035] As a feasible specific implementation manner of the embodiment of the present application, refer to Figure 3 , a plurality of windshields 24 arranged linearly are provided on the inner wall of the preheating chamber 20. An ash removal groove 25 is formed between two adjacent windshields 24. The high-temperature gas entering the static pressure chamber 22 from the ventilation gap 23 will enter between the two windshields 24, causing the gas to continuously move turbulently in the ash removal groove 25. As a result, the dust carried in the flue gas gradually separates from the air flow and adheres to the windshield 24 or between the windshields 24, reducing the amount of dust impurities in the flue gas entering the adsorption assembly 31, improving the working environment of the adsorption assembly 31, and extending the overall service life of the device.

[0036] In a possible implementation manner of the embodiment of the present application, when the gas flow direction in the static pressure chamber 22 is taken as the positive direction, the normal vectors of the adjacent sides of two adjacent windshields 24 installed on the same inner wall of the preheating chamber 20 are perpendicular to the positive direction. In this way, when the gas entering the ash removal groove 25 from the ventilation gap 23 leaves the ash removal groove 25 and enters the second exhaust pipe 30, it will be blocked by the two windshields of the windshield 24, further increasing the degree of gas turbulence, effectively reducing the dynamic pressure of the high-temperature gas, improving the working environment of the adsorption assembly 31, and extending the overall service life of the device.

[0037] In a possible implementation manner of the embodiment of the present application, refer to Figure 4 , a baffle 26 is provided between two adjacent windshields 24. A plurality of protrusions 27 are provided on the baffle 26. The plurality of protrusions 27 on the baffle 26 are arranged linearly. By providing the protrusions 27, when the gas enters the ash removal groove 25 and impacts the baffle 26, the dynamic pressure of the high-temperature gas is reduced, and a groove capable of storing dust is formed between two adjacent protrusions 27, enabling the dust in the gas to enter the groove during the impact process to achieve the separation of the gas and the dust, and extending the overall service life of the device. In this embodiment, the side of the protrusion 27 on the baffle 26 close to the ventilation gap 23 is an arc surface, so that the gas can more easily enter the aforementioned groove, further increasing the degree of gas turbulence and effectively reducing the dynamic pressure of the high-temperature gas.

[0038] The embodiments of this specific implementation manner are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A gas heating furnace smoke purification device, comprising a gas furnace (10), wherein a first exhaust pipe (11) for exhausting smoke is arranged on the gas furnace (10), wherein the ... A preheating box (20) is arranged on one side of the gas furnace (10), a heat-insulating inner container (21) is arranged in the preheating box (20), a static pressure cavity (22) for gas circulation is provided between the inner wall of the preheating box (20) and the outer wall of the heat-insulating inner container (21), a plurality of ventilation slits (23) are provided on the heat-insulating inner container (21), and the internal space of the heat-insulating inner container (21) is connected to the static pressure cavity (22) via the ventilation slits (23); An end of the first exhaust pipe (11) away from the gas furnace (10) is inserted into the heat-insulating inner container (21); an openable closed door and a second exhaust pipe (30) are provided on the preheating box (20); an air inlet of the second exhaust pipe (30) is located in the static pressure chamber (22); an air outlet of the second exhaust pipe (30) is located outside the preheating box (20); an adsorption component (31) for purifying smoke dust in the smoke is provided in the middle of the second exhaust pipe (30); and the inner diameter of the second exhaust pipe (30) is larger than the inner diameter of the first exhaust pipe (11).

2. A gas heating furnace smoke purification device according to claim 1, characterized in that: The closed door on the preheating box (20) is located at an end of the preheating box (20) away from the first exhaust pipe (11), and the second exhaust pipe (30) is close to the closed door.

3. A gas heating furnace smoke purification device according to claim 1, characterized in that: A plurality of linearly arranged wind shields (24) are provided on the inner wall of the preheating box (20), and an ash removal trough (25) is formed between two adjacent wind shields (24).

4. A gas heating furnace smoke purification device according to claim 3, characterized in that: When the flow direction of the gas in the static pressure chamber (22) is taken as the positive direction, the normal vectors of the mutually adjacent sides of two adjacent wind shields (24) installed on the same inner wall of the preheating box (20) are perpendicular to the positive direction.

5. A gas heating furnace smoke purification device according to claim 3, characterized in that: A baffle plate (26) is provided between two adjacent wind shield plates (24), a plurality of protrusions (27) are provided on the baffle plate (26), and the plurality of protrusions (27) on the baffle plate (26) are arranged linearly.

6. A gas heating furnace smoke purification device according to claim 5, characterized in that: The side of the protrusion (27) on the blocking plate (26) close to the ventilation gap (23) is an arc-shaped surface.

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