Drying oven with exhaust device

Abstract

The drying oven with the exhaust device comprises a drying oven body and an exhaust fan, one side of the drying oven body is communicated with an exhaust pipe, the exhaust fan is arranged on the exhaust pipe, the side, away from the drying oven body, of the exhaust pipe is communicated with a waste gas treatment box, and the exhaust fan is used for sucking gas in the drying oven body into the exhaust pipe. The end, away from the exhaust fan, of the waste gas treatment box is communicated with a gas return pipe, the other end of the gas return pipe is communicated with the oven body, a gas buffer area, a chemical reaction area and a gas pressure relief area are sequentially arranged in the waste gas treatment box in the length direction of the waste gas treatment box, and the gas buffer area is communicated with the gas outlet end of the exhaust fan. The mica paper drying device has the advantage that environmental pollution caused by harmful gas generated when mica paper is dried can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of material manufacturing equipment, and in particular to an oven with an exhaust device. Background Art

[0002] The contents in this section merely provide background information related to the present invention and may not constitute prior art.

[0003] The mica paper coating machine usually needs to be dipped in glue and then put into the oven for drying after the mica paper is covered with double-sided glass fiber. During the drying process, a large amount of toxic gases such as toluene are usually produced. These gases are discharged into the workshop air when the substrate leaves the oven and is rolled up, causing serious pollution to the air environment in the workshop.

[0004] A Chinese patent with authorization announcement number CN202792890U discloses an oven with an exhaust device, including a box body, on which are arranged a plurality of exhaust branch pipes, the plurality of exhaust branch pipes are connected to an exhaust main pipe, and the exhaust main pipe is connected to a fan; in the actual production process, the fan is turned on, and harmful gases such as toluene generated during drying enter the exhaust main pipe through the exhaust branch pipes and are discharged through the fan.

[0005] However, the above-mentioned related technologies have the following defects: although harmful gases such as toluene generated during the drying process are extracted by the fan, the harmful substances present in the extracted gases will still cause serious pollution to the environment. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide an oven with an exhaust device, which can effectively reduce the pollution to the environment caused by harmful gases generated when drying mica paper.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] An oven with an exhaust device comprises an oven body and an exhaust fan, wherein an exhaust pipe is connected to one side of the oven body, the exhaust fan is arranged on the exhaust pipe, and an exhaust gas treatment box is connected to the side of the exhaust pipe away from the oven body. The exhaust fan is used to suck the gas in the oven body into the exhaust pipe, and an end of the exhaust gas treatment box away from the exhaust fan is connected to a return pipe, and the other end of the return pipe is connected to the oven body. A gas buffer zone, a chemical reaction zone and a gas pressure relief zone are sequentially arranged in the waste gas treatment box along the length direction of the waste gas treatment box, the gas buffer zone is connected to the gas outlet end of the exhaust fan, and the gas pressure relief zone is connected to the return pipe.

[0009] In some possible embodiments, a one-way pressurizing valve is connected between the gas buffer zone and the chemical reaction zone, a first partition is arranged in the gas buffer zone, and second partitions are slidably arranged on both sides of the first partition along the length direction of the exhaust gas treatment box, a plurality of ventilation holes are opened on the first partition and the second partition, and the ventilation holes on the first partition and the second partition are staggered, and a driving assembly is arranged on the exhaust gas treatment box, and the driving assembly is used to drive the two second partitions to move toward or away from each other.

[0010] In some possible embodiments, the driving assembly includes a driving motor and a screw. A slide groove is opened at the bottom of the gas buffer zone along the length direction of the exhaust gas treatment box. Two sliders are slidably arranged in the slide groove. The two sliders are arranged on both sides of the first partition. The sliders correspond to the second partition one by one and are fixedly connected. The screw is rotatably arranged in the slide groove along the length direction of the slide groove. The sliders are threadedly sleeved on both ends of the screw. The driving motor is fixedly arranged on the exhaust gas treatment box, and the output shaft of the driving motor is transmission-connected to the screw.

[0011] In some possible embodiments, an adsorption plate is provided on one side of the gas buffer zone close to the one-way pressurizing valve, and the area of ​​the adsorption plate is adapted to the inner cross-sectional area of ​​the gas buffer zone. A strip hole for the adsorption plate to pass through is opened on the top of the exhaust gas treatment box, and a sealing assembly is provided on the exhaust gas treatment box, and the sealing assembly is used to close the gap between the adsorption plate and the inner wall of the strip hole.

[0012] In some possible embodiments, the sealing assembly includes a sealing block and a sealing strip. A sealing groove is opened on the top of the exhaust gas treatment box, the strip hole is opened on the bottom wall of the sealing groove, the sealing block is slidably inserted in the sealing groove, the sealing strip is fixedly set at the bottom of the sealing block, and the bottom of the sealing strip is used to abut against the bottom wall of the sealing groove. A limiting member is set on the exhaust gas treatment box, and the limiting member is used to limit the position of the sealing block in the sealing groove.

[0013] In some possible embodiments, the limiting member is configured as a latch, a mounting hole is horizontally provided on the side wall of the sealing groove, the latch is slidably inserted into the mounting hole, a plug hole for inserting the latch is provided on the side wall of the sealing block, an elastic member is provided in the mounting hole, the elastic member is used to drive the latch to move in a direction away from the mounting hole, and a driving member is provided on the exhaust gas treatment box, the driving member is used to drive the latch to move in the mounting hole.

[0014] In some possible embodiments, a mounting portion is slidably provided on the top of the exhaust gas treatment box, a rocker is rotatably provided on the mounting portion, and a slot for one end of the rocker to be inserted into is provided on one side of the sealing block. When one end of the rocker is inserted into the slot, the other end of the rocker is lifted off the mounting portion.

[0015] In some possible embodiments, an oxygen inlet is provided in the chemical reaction zone, a mixed gas fan is rotatably provided at the bottom of the chemical reaction zone, a driving member for driving the mixed gas fan to rotate is provided on the exhaust gas treatment box, and a one-way pressure relief valve is connected between the chemical reaction zone and the gas pressure relief zone.

[0016] In some possible embodiments, a gas pressure monitor is provided in the gas pressure relief zone, a through hole is provided on the side wall of the gas pressure relief zone, a detection block is provided in the through hole, a detection test paper is provided on the side of the detection block close to the gas pressure relief zone, an observation hole is provided on the detection block, the observation hole is covered with transparent glass, and a fixing is provided on the exhaust gas treatment box, and the fixing is used to limit the position of the detection block on the exhaust gas treatment box.

[0017] In summary, the technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0018] 1. In actual use, after the exhaust gas in the oven is sucked out by the exhaust fan, the exhaust gas enters the gas buffer zone of the exhaust gas treatment box, and the exhaust gas flow rate entering is buffered and slowed down by the first baffle and the second baffle, and then the exhaust gas passes through the adsorption plate to adsorb the large particle pollutants contained in the exhaust gas. After the adsorption is completed, it enters the chemical reaction zone through the one-way pressure valve, and reacts with the high-temperature and high-pressure exhaust gas under the action of the catalyst by introducing high-concentration oxygen, which can effectively remove the harmful substances in the exhaust gas. Then the gas enters the gas pressure relief zone, and after pressure detection and chemical detection, the gas flows back to the oven, thereby realizing the treatment of harmful exhaust gas, effectively reducing the pollution to the environment, and also improving the protection of the health of on-site workers;

[0019] 2. By adjusting the distance between the two second partitions, the flow rate of the waste gas in the gas buffer zone can be adjusted. The pollutant particles contained in the waste gas generated by mica paper production with different processes also have certain differences. By adjusting the flow rate, the adsorption effect of the subsequent adsorption plate on the pollutant particles in the waste gas can be effectively improved, further reducing the pollution of the waste gas to the environment;

[0020] 3. As the usage time increases, the adsorption plate can be replaced. By releasing the limit of the position of the sealing block in the sealing groove by the limiter, the adsorption plate can be taken out from the exhaust gas treatment box, so as to replace the adsorption plate, which can ensure that the pollutant particles in the exhaust gas always have a good adsorption effect;

[0021] 4. The gas in the gas pressure relief area is tested by the test paper. During the testing process, the test paper is observed in real time through the observation hole, so that the staff can test the gas in the gas pressure relief area conveniently, and ensure that the gas in the gas pressure relief area is pollution-free gas after treatment, which further improves the treatment effect of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the internal structure of an exhaust gas treatment box according to an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the exploded structure of the limiting member according to an embodiment of the present invention;

[0026] Figure 5 for Figure 4 A magnified view of part A in FIG.

[0027] Figure 6 A schematic diagram of the internal structure of a chemical reaction zone according to an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the internal structure of the gas pressure relief zone according to an embodiment of the present invention.

[0029] Icons: 1. Oven body; 11. Exhaust fan; 12. Exhaust pipe; 13. Return air pipe; 2. Exhaust gas treatment box; 21. Gas buffer zone; 22. Chemical reaction zone; 23. Gas pressure relief zone; 3. One-way pressurizing valve; 31. First baffle; 32. Second baffle; 33. Vent; 4. Drive assembly; 41. Drive motor; 42. Lead screw; 43. Slide; 44. Slider; 5. Adsorption plate; 51. Strip hole; 6. Sealing assembly; 61. Sealing block; 62. Sealing Rubber strip; 63, limit piece; 64, mounting hole; 65, jack; 66, elastic piece; 67, driving piece; 68, connecting hole; 69, connecting block; 7, guide groove; 71, guide block; 72, mounting part; 73, rocker; 74, slot; 8, oxygen inlet; 81, oxygen intake pipe; 82, mixed air fan; 83, rotating motor; 9, air pressure monitor; 91, perforation; 92, detection block; 93, detection test paper; 94, fixing piece; 95, through hole; 96, fixing hole. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] The following reference Figures 1 to 7The present invention is described in further detail.

[0032] Reference Figure 1 , 2 An oven with an exhaust device comprises an oven body 1 and an exhaust fan 11, an exhaust pipe 12 is connected to one side of the oven body 1, the exhaust fan 11 is arranged on the exhaust pipe 12, a side of the exhaust pipe 12 away from the oven body 1 is connected to an exhaust gas treatment box 2, the exhaust fan 11 is used to suck the gas in the oven body 1 into the exhaust pipe 12, one end of the exhaust gas treatment box 2 away from the exhaust fan 11 is connected to a return air pipe 13, the other end of the return air pipe 13 is connected to the oven body 1, a gas buffer zone 21, a chemical reaction zone 22 and a gas pressure relief zone 23 are sequentially arranged in the exhaust gas treatment box 2 along the length direction of the exhaust gas treatment box 2, the gas buffer zone 21 is connected to the gas outlet end of the exhaust fan 11, and the gas pressure relief zone 23 is connected to the return air pipe 13.

[0033] Among them, refer to Figure 2 , 3 A one-way pressurizing valve 3 is connected between the gas buffer zone 21 and the chemical reaction zone 22. A first partition 31 is arranged in the gas buffer zone 21. Second partitions 32 are slidably arranged on both sides of the first partition 31 along the length direction of the exhaust gas treatment box 2. A plurality of ventilation holes 33 are opened on the first partition 31 and the second partition 32. The ventilation holes 33 on the first partition 31 and the second partition 32 are staggered. A driving component 4 is arranged on the exhaust gas treatment box 2. The driving component 4 is used to drive the two second partitions 32 to move toward or away from each other.

[0034] When the distance between the first partition plate 31 and the second partition plate 32 is smaller, the time for the airflow to pass through the first partition plate 31 and the second partition plate 32 in sequence is shorter, and the flow rate of the airflow is faster. Conversely, when the distance between the first partition plate 31 and the second partition plate 32 is larger, the flow rate of the airflow is slower. Since there are certain differences in the pollutant particles contained in the waste gas generated by the mica paper production process with different processes, the flow rate can be adjusted to effectively improve the adsorption effect of the subsequent adsorption plate 5 on the pollutant particles in the waste gas, thereby further reducing the pollution of the waste gas to the environment.

[0035] Reference Figure 3As an embodiment of the present invention, the driving component 4 includes a driving motor 41 and a screw 42. A slide groove 43 is opened at the bottom of the gas buffer zone 21 along the length direction of the exhaust gas treatment box 2. Two sliders 44 are slidably arranged in the slide groove 43. The two sliders 44 are arranged on both sides of the first partition plate 31. The sliders 44 correspond to the second partition plate 32 one by one and are fixedly connected. The screw 42 is rotatably arranged in the slide groove 43 along the length direction of the slide groove 43. The sliders 44 are threadedly sleeved on both ends of the screw 42. The driving motor 41 is fixedly arranged on the exhaust gas treatment box 2, and the output shaft of the driving motor 41 is transmission-connected to the screw 42.

[0036] As an embodiment of the present invention, refer to Figure 3 The slide groove 43 is provided as a T-shaped groove, and the slider 44 is provided as a T-shaped block adapted to the slide groove 43 . As another possible embodiment of the present invention, the slide groove 43 can also be provided as a dovetail groove, and the slider 44 is provided as a dovetail block adapted to the slide groove 43 .

[0037] Reference Figure 2 , 4 An adsorption plate 5 is arranged on one side of the gas buffer zone 21 close to the one-way pressurizing valve 3, and the area of ​​the adsorption plate 5 is adapted to the inner cross-sectional area of ​​the gas buffer zone 21. A strip hole 51 for the adsorption plate 5 to pass through is opened on the top of the exhaust gas treatment box 2. A sealing component 6 is arranged on the exhaust gas treatment box 2, and the sealing component 6 is used to close the gap between the adsorption plate 5 and the inner wall of the strip hole 51.

[0038] Reference Figure 4 , 5 As an embodiment of the present invention, the sealing assembly 6 includes a sealing block 61 and a sealing strip 62. A sealing groove is provided at the top of the exhaust gas treatment box 2. The strip hole 51 is provided at the bottom wall of the sealing groove. The sealing block 61 is slidably inserted in the sealing groove. The sealing strip 62 is fixedly provided at the bottom of the sealing block 61, and the bottom of the sealing strip 62 is used to abut against the bottom wall of the sealing groove. A limiting member 63 is provided on the exhaust gas treatment box 2, and the limiting member 63 is used to limit the position of the sealing block 61 in the sealing groove.

[0039] Among them, refer to Figure 5 As an embodiment of the present invention, the limiting member 63 is configured as a latch, a mounting hole 64 is horizontally provided on the side wall of the sealing groove, the latch is slidably inserted into the mounting hole 64, a plug hole 65 for inserting the latch is provided on the side wall of the sealing block 61, an elastic member 66 is provided in the mounting hole 64, the elastic member 66 is used to drive the latch to move in a direction away from the mounting hole 64, and a driving member 67 is provided on the exhaust gas treatment box 2, the driving member 67 is used to drive the latch to move in the mounting hole 64.

[0040] As an embodiment of the present invention, refer to Figure 5The driving member 67 is configured as a driving plate, and a connecting hole 68 is opened at the top of the exhaust gas treatment box 2. The connecting hole 68 is connected to the mounting hole 64. A connecting block 69 is slidably arranged in the connecting hole 68. The driving plate is slidably arranged on the top of the exhaust gas treatment box 2. The top of the connecting block 69 is fixedly connected to the bottom of the driving plate, and the bottom of the connecting block 69 is fixedly connected to the pin through the connecting hole 68.

[0041] As the usage time increases, the adsorption plate 5 can be replaced. By releasing the limit of the position of the sealing block 61 in the sealing groove by the limiter 63, the adsorption plate 5 can be taken out from the exhaust gas treatment box 2, thereby replacing the adsorption plate 5, which can ensure that the pollutant particles in the exhaust gas always have a good adsorption effect.

[0042] Reference Figure 5 As an embodiment of the present invention, the elastic member 66 is configured as a compression spring, which is disposed in the mounting hole 64, one end of which is fixedly connected to the inner wall of the mounting hole 64, and the other end of which is fixedly connected to the tail of the latch.

[0043] Reference Figure 4 , 5 A guide groove 7 is horizontally provided at the top of the exhaust gas treatment box 2, a guide block 71 is slidably provided in the guide groove 7, a mounting portion 72 is slidably provided at the top of the exhaust gas treatment box 2, the bottom of the mounting portion 72 is fixedly connected to the top of the guide block 71, a rocker 73 is rotatably provided on the mounting portion 72, and a slot 74 is provided on one side of the sealing block 61 for one end of the rocker 73 to be inserted into. When one end of the rocker 73 is inserted into the slot 74, the other end of the rocker 73 is lifted off the mounting portion 72.

[0044] As one embodiment of the present invention, the guide groove 7 is provided as a T-shaped groove, and the guide block 71 is correspondingly provided as a T-shaped block; as another embodiment of the present invention, the guide groove 7 can also be provided as a dovetail groove, and in this case, the guide block 71 is correspondingly provided as a dovetail block.

[0045] During actual use, as the use time increases, adhesion will inevitably occur between the sealing strip 62 and the bottom wall of the sealing groove. At this time, it is difficult for the staff to remove the adsorption plate 5 from the exhaust gas treatment box 2 by simply pulling the sealing block 61. At this time, the mounting part 72 is driven to move on the top of the exhaust gas treatment box 2, so that one end of the rocker 73 is inserted into the slot 74, and then the staff presses the other end of the rocker 73 to easily drive the sealing block 61 out of the sealing groove through the lever principle.

[0046] Reference Figure 2 , 6An oxygen inlet 8 is provided in the chemical reaction zone 22, and an oxygen inlet pipe 81 is connected to the oxygen inlet 8; a mixed gas fan 82 is rotatably provided at the bottom of the chemical reaction zone 22, a driving member 67 for driving the mixed gas fan 82 to rotate is provided on the exhaust gas treatment box 2, and a one-way pressure relief valve is connected between the chemical reaction zone 22 and the gas pressure relief zone 23. As an embodiment of the present invention, the driving member 67 is configured as a rotating motor 83, and the output shaft of the rotating motor 83 is connected to the rotating shaft of the mixed gas fan 82 through a coupling.

[0047] When drying mica paper, the temperature in the oven body 1 can usually reach between 150°C and 220°C, so the temperature of the gas entering the chemical reaction zone 22 will also be maintained at 200°C. At the same time, as an embodiment of the present application, the air pressure in the chemical reaction zone 22 is pressurized by oxygen introduction and pressure-boosting valve, and a high-pressure environment is formed in the chemical reaction zone 22. In actual use, catalysts such as copper-chromium oxide and manganese-iron oxide can be placed in the chemical reaction zone 22, which can further accelerate the reaction of oxygen and toluene waste gas in the chemical reaction zone 22, thereby effectively removing harmful substances such as toluene in the waste gas.

[0048] Reference Figure 7 A gas pressure monitor 9 is arranged in the gas pressure relief zone 23. As an embodiment of the present invention, three gas pressure monitors 9 are arranged in sequence along the height direction, which can monitor the gas pressure at different heights in the gas pressure relief zone 23, so as to ensure the gas pressure balance in the gas pressure relief zone 23. A through hole 91 is opened on the side wall of the gas pressure relief zone 23, and a detection block 92 is arranged in the through hole 91. A detection test paper 93 is arranged on the side of the detection block 92 close to the gas pressure relief zone 23, an observation hole is opened on the detection block 92, and a transparent glass is covered on the observation hole. A fixing part 94 is arranged on the exhaust gas treatment box 2, and the fixing part 94 is used to limit the position of the detection block 92 on the exhaust gas treatment box 2.

[0049] Among them, refer to Figure 7 As an embodiment of the present invention, the fixing member 94 is set as a fixing bolt, through holes 95 are opened at the four corners of the detection block 92, the fixing bolts are slidably penetrated in the through holes 95, and fixing holes 96 for threaded connection of the fixing bolts are opened on the side wall of the exhaust gas treatment box 2. The gas in the gas pressure relief area 23 is detected by the detection test paper 93, and the detection test paper 93 is observed in real time through the observation hole during the detection process, so that it is convenient for the staff to detect the gas in the gas pressure relief area 23, and ensure that the gas in the gas pressure relief area 23 is non-polluting gas after treatment, which further improves the treatment effect of the exhaust gas.

[0050] In actual use, the processed gas returns to the oven body 1 through the return air pipe, which can maintain the gas temperature in the oven body 1. Therefore, during a long drying process, the oven body 1 only needs to use lower power to maintain a higher temperature in the oven body 1, thereby ensuring the drying efficiency of the material.

[0051] As an implementation mode of the present application, an exhaust valve (not shown in the figure) is provided on the return air pipe 13. After the material is dried, and after the pressure test and chemical test of the gas in the gas pressure relief area 23 are up to standard, the exhaust valve is opened to discharge the gas that has completed the waste gas treatment. During the drying process, the gas continuously circulates between the oven body 1 and the waste gas treatment box 2. On the one hand, the power of the oven body 1 is reduced, and on the other hand, the discharge of waste gas that does not meet the standard can be avoided, which improves the environmental protection effect while ensuring the health of the staff.

[0052] The implementation principle of an oven with an exhaust device proposed in an embodiment of the present invention is:

[0053] In actual use, after the exhaust gas in the oven body 1 is sucked out by the exhaust fan 11, the exhaust gas enters the gas buffer zone 21 of the exhaust gas treatment box 2, and the first partition plate 31 and the second partition plate 32 buffer and reduce the flow rate of the incoming exhaust gas, and then the exhaust gas passes through the adsorption plate 5 to adsorb the large particle pollutants contained in the exhaust gas. After the adsorption is completed, the exhaust gas enters the chemical reaction zone 22 through the one-way pressure valve 3, and reacts with the high-temperature and high-pressure exhaust gas under the action of the catalyst by introducing high-concentration oxygen, which can effectively remove harmful substances in the exhaust gas. Then the gas enters the gas pressure relief zone 23, and the gas is pressure- and chemically tested in the gas pressure relief zone 23. If the pressure is higher than the preset pressure value, the one-way pressure relief valve and the one-way pressure valve 3 are closed. After the gas pressure in the gas pressure relief zone 23 drops to the preset pressure value, the gas pressure relief valve is opened to allow the gas in the chemical reaction zone 22 to enter the gas pressure relief zone 23 through the one-way pressure relief valve; if the chemical detection fails to reach the preset standard, the adsorption plate 5 needs to be replaced in time to ensure that the adsorption plate 5 has a good filtering effect on the exhaust gas, and at the same time adjust the gas pressure in the chemical reaction zone 22, increase the gas pressure to ensure that the exhaust gas and the high-pressure oxygen have a sufficient reaction, and improve the treatment effect of the exhaust gas. When the gas in the gas pressure relief zone 23 passes the pressure detection and chemical detection, the content of harmful exhaust gas in the gas flowing back into the oven body 1 is greatly reduced, which effectively reduces the pollution to the environment and improves the protection of the health of the on-site staff.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oven with an exhaust device, characterized in that: The invention comprises an oven body (1) and an exhaust fan (11), wherein an exhaust pipe (12) is connected to one side of the oven body (1), the exhaust fan (11) is arranged on the exhaust pipe (12), the exhaust pipe (12) is connected to a waste gas treatment box (2) at a side away from the oven body (1), the exhaust fan (11) is used to suck gas in the oven body (1) into the exhaust pipe (12), the end of the waste gas treatment box (2) away from the exhaust fan (11) is connected to a return pipe (13), the other end of the return pipe (13) is connected to the oven body (1), a gas buffer zone (21), a chemical reaction zone (22) and a gas pressure relief zone (23) are arranged in sequence in the waste gas treatment box (2) along the length direction of the waste gas treatment box (2), the gas buffer zone (21) is connected to the gas outlet end of the exhaust fan (11), and the gas pressure relief zone (23) is connected to the return pipe (13).

2. The oven with exhaust device according to claim 1, characterized in that: A one-way pressurizing valve (3) is connected between the gas buffer zone (21) and the chemical reaction zone (22); a first partition plate (31) is arranged in the gas buffer zone (21); second partition plates (32) are slidably arranged on both sides of the first partition plate (31) along the length direction of the waste gas treatment box (2); a plurality of ventilation holes (33) are provided on the first partition plate (31) and the second partition plate (32); the ventilation holes (33) on the first partition plate (31) and the second partition plate (32) are arranged in an alternating manner; a driving component (4) is arranged on the waste gas treatment box (2); the driving component (4) is used to drive the two second partition plates (32) to move in a direction of approaching or moving away from each other.

3. The oven with exhaust device according to claim 2, characterized in that: The driving assembly (4) comprises a driving motor (41) and a lead screw (42). A slide groove (43) is provided at the bottom of the gas buffer zone (21) along the length direction of the exhaust gas treatment box (2). Two sliders (44) are slidably provided in the slide groove (43). The two sliders (44) are provided on both sides of the first partition plate (31). The sliders (44) correspond to the second partition plate (32) one by one and are fixedly connected. The lead screw (42) is rotatably provided in the slide groove (43) along the length direction of the slide groove (43). The sliders (44) are threadedly sleeved on both ends of the lead screw (42). The driving motor (41) is fixedly provided on the exhaust gas treatment box (2). The output shaft of the driving motor (41) is drivingly connected to the lead screw (42).

4. The oven with exhaust device according to claim 3, characterized in that: An adsorption plate (5) is arranged on one side of the gas buffer zone (21) close to the one-way pressurizing valve (3), and the area of ​​the adsorption plate (5) is adapted to the inner cross-sectional area of ​​the gas buffer zone (21). A strip hole (51) for the adsorption plate (5) to pass through is opened on the top of the exhaust gas treatment box (2), and a sealing component (6) is arranged on the exhaust gas treatment box (2), and the sealing component (6) is used to close the gap between the adsorption plate (5) and the inner wall of the strip hole (51).

5. The oven with exhaust device according to claim 4, characterized in that: The sealing assembly (6) comprises a sealing block (61) and a sealing strip (62); a sealing groove is provided at the top of the exhaust gas treatment box (2); the strip-shaped hole (51) is provided at the bottom wall of the sealing groove; the sealing block (61) is slidably inserted into the sealing groove; the sealing strip (62) is fixedly arranged at the bottom of the sealing block (61); and the bottom of the sealing strip (62) is used to abut against the bottom wall of the sealing groove; a limiting member (63) is provided on the exhaust gas treatment box (2); and the limiting member (63) is used to limit the position of the sealing block (61) in the sealing groove.

6. The oven with exhaust device according to claim 5, characterized in that: The limiting member (63) is configured as a latch, a mounting hole (64) is provided on the side wall of the sealing groove in a horizontal direction, the latch is slidably inserted into the mounting hole (64), a plug hole (65) for inserting the latch is provided on the side wall of the sealing block (61), an elastic member (66) is provided in the mounting hole (64), the elastic member (66) is used to drive the latch to move in a direction away from the mounting hole (64), and a driving member (67) is provided on the exhaust gas treatment box (2), the driving member (67) is used to drive the latch to move in the mounting hole (64).

7. The oven with exhaust device according to claim 5, characterized in that: A mounting portion (72) is slidably provided on the top of the exhaust gas treatment box (2), a seesaw (73) is rotatably provided on the mounting portion (72), a slot (74) for one end of the seesaw (73) to be inserted into is provided on one side of the sealing block (61), and when one end of the seesaw (73) is inserted into the slot (74), the other end of the seesaw (73) is lifted off the mounting portion (72).

8. The oven with exhaust device according to claim 1, characterized in that: An oxygen inlet (8) is provided in the chemical reaction zone (22), a mixed gas fan (82) is rotatably provided at the bottom of the chemical reaction zone (22), a driving member (67) for driving the mixed gas fan (82) to rotate is provided on the waste gas treatment box (2), and a one-way pressure relief valve is connected between the chemical reaction zone (22) and the gas pressure relief zone (23).

9. The oven with exhaust device according to claim 1, characterized in that: A gas pressure monitor (9) is arranged in the gas pressure relief zone (23); a through hole (91) is provided on the side wall of the gas pressure relief zone (23); a detection block (92) is arranged in the through hole (91); a detection test paper (93) is arranged on the side of the detection block (92) close to the gas pressure relief zone (23); an observation hole is provided on the detection block (92); a transparent glass is covered on the observation hole; a fixing member (94) is arranged on the waste gas treatment box (2); the fixing member (94) is used to limit the position of the detection block (92) on the waste gas treatment box (2).

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