Waste gas purification device for calcining furnace

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a calcining furnace waste gas purification device which comprises a tower cavity, a negative pressure motor is mounted on the outer side of the bottom end of the tower cavity, a rotating shaft is mounted at the output end of the negative pressure motor, a driving wheel is mounted on the outer wall of one end of the rotating shaft, and a connecting pipe is rotatably mounted in one end of a gas inlet pipeline. A driven wheel is installed on the outer side of one end of the connecting pipe and connected with the driving wheel through a belt in a matched mode, and a blowing head is installed at the other end of the connecting pipe. A negative pressure motor is started to drive a rotating shaft to rotate, a driving wheel rotates along with the rotating shaft, the driving wheel drives a driven wheel to rotate through a belt, then a connecting pipe rotates between an air inlet pipeline and a tower cavity, and five sets of blowing heads installed at the other end of the connecting pipe at equal intervals evenly blow waste gas to different directions in the tower cavity in the rotating process. The spraying range of the waste gas in the tower cavity is enlarged, so that the waste gas can be more fully contacted with a purification medium in the tower cavity, and the purification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a calcining furnace waste gas purification device. Background Art

[0002] During the calcination process of honeycomb catalyst, its raw materials contain nitrogen. Under high-temperature calcination conditions, the nitrogen in the raw materials will react with oxygen to generate nitrogen oxides. If not treated, it will cause corrosion and damage to soil and water bodies. Therefore, an exhaust gas purification device is needed.

[0003] A Chinese patent with authorization announcement number CN111249845A discloses an exhaust gas purification device, including a lifting pipe, with booster fans on both sides of the outer wall of the bottom end of the lifting pipe, an output bucket integrally connected to the outer wall of the bottom end of the cylinder, and an electrostatic generating structure arranged in the middle of the inner wall of the cylinder. The invention presses the exhaust gas into a honeycomb filter for pre-treatment through the lifting pipe to filter out large particles and dust therein, and then the small particles in the exhaust gas entering the purification cylinder are fixed on the outer wall of the magnetic rod through a magnetic rod and an electrostatic generator. During cleaning, a rotating motor is used to drive the magnetic rod and the cleaning rod on the fixed frame to collide and roll with each other, so that the accumulated dust and impurities are discharged through the circulating fan through the cleaning duct, thereby improving the self-cleaning ability of the overall equipment.

[0004] However, the above-mentioned waste gas purification treatment device still has some problems. In actual application, the waste gas will be concentrated in certain areas after entering the tower cavity and cannot be evenly contacted with the purification medium, resulting in some harmful substances in the waste gas being directly discharged without being effectively treated, thereby reducing the overall purification efficiency; therefore, a calcining furnace waste gas purification device is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems raised in the background technology, the utility model proposes a calcining furnace exhaust gas purification device.

[0006] The technical solution adopted by the utility model to solve its technical problem is: a calcining furnace exhaust gas purification device described in the utility model comprises a base plate, a support column is installed at one end of the top side of the base plate, an air intake pipe is installed at the top of the support column, a tower cavity is installed at the other end of the top side of the base plate, a negative pressure motor is installed on the outside of the bottom end of the tower cavity, a rotating shaft is installed at the output end of the negative pressure motor, one end of the rotating shaft extends to the interior of the air intake pipe, three fan blades are installed at the middle end of the rotating shaft, a driving wheel is installed on the outer wall of one end of the rotating shaft, a connecting pipe is rotatably installed inside one end of the air intake pipe, one end of the connecting pipe is movably passed through the interior of the tower cavity, a driven wheel is installed on the outside of one end of the connecting pipe, the driving wheel and the driven wheel are connected by a belt, and five groups of five blowing heads are equidistantly installed on the other end of the connecting pipe, which increases the injection range of the exhaust gas in the tower cavity, enables the exhaust gas to more fully contact with the purification medium in the tower cavity, and improves the purification efficiency.

[0007] Preferably, a filter plate is installed on the inner wall of the other end of the air intake duct, which is located on the outside of the rotating shaft; a brush in contact with the filter plate is installed on the other end of the rotating shaft; a dust hopper is installed on the outer wall of the bottom side of the air intake duct, which is located below the filter plate; a baffle is slidably installed inside the bottom end of the dust hopper, which can effectively intercept large particles of impurities in the exhaust gas and prevent them from entering the tower cavity and affecting the subsequent purification effect. At the same time, with the design of the brush and the dust hopper, impurities on the filter plate can be automatically cleaned to prevent blockage.

[0008] Preferably, the top side of the base plate is installed on a storage box, the interior of the storage box is connected to a delivery pipe, a pump is installed on the outside of the bottom end of the delivery pipe, the middle end and the top end of the delivery pipe are connected to a feed pipe through the tower cavity, a number of straight pipes are installed at equal intervals on the outside of the feed pipe, spray holes are opened inside the straight pipes, and the inner walls of the tower cavity are respectively equipped with packing layers below the straight pipes, which can effectively neutralize harmful substances in the exhaust gas and achieve chemical purification.

[0009] Preferably, the top of the tower cavity is connected to an air outlet pipe, a through groove is provided inside the air outlet pipe, an activated carbon mesh plate is movably installed inside the through groove, and side ears are installed on the outside of the air outlet pipe, and limit pins are movably installed inside the side ears that penetrate the activated carbon mesh plate to further absorb residual pollutants in the exhaust gas, while making the activated carbon mesh plate easy to disassemble and clean.

[0010] Preferably, a movable door is installed on the outer side of the tower cavity through a hinge, and a handle is installed on the outer side of the movable door, so that staff can easily enter the tower cavity for maintenance and cleaning work.

[0011] Preferably, a control panel is installed on the outside of the storage box, and the control panel is used to control the operation of the electrical components inside the device, thereby realizing centralized control of the electrical components inside the device.

[0012] The utility model is beneficial in that:

[0013] 1. The negative pressure motor of the utility model starts, driving the rotating shaft to rotate, and the driving wheel rotates accordingly. The driving wheel drives the driven wheel to rotate through the belt, thereby causing the connecting pipe to rotate between the air inlet pipe and the tower cavity. The five sets of blowing heads installed at the other end of the connecting pipe at equal intervals blow the exhaust gas evenly in different directions in the tower cavity during the rotation process, thereby increasing the spray range of the exhaust gas in the tower cavity, allowing the exhaust gas to more fully contact the purification medium in the tower cavity, and improving the purification efficiency;

[0014] 2. In the present invention, the brush installed at the other end of the rotating shaft continuously cleans the large particles of impurities intercepted on the filter plate as the rotating shaft rotates. The cleaned impurities fall into the dust hopper on the outer wall of the bottom side of the air intake duct. The baffle installed slidingly inside the bottom end of the dust hopper can be pulled out when impurities need to be cleaned, facilitating the discharge of impurities.

[0015] 3. In the utility model, the waste gas after purification rises to the top of the tower cavity, and is further adsorbed by the activated carbon mesh plate to remove the pollutants remaining in the waste gas, and is finally discharged through the air outlet pipe. When the activated carbon mesh plate needs to be cleaned or replaced, the limit pin that passes through the activated carbon mesh plate inside the side ear is pulled out, and the activated carbon mesh plate can be easily taken out for cleaning or replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model from the middle axis side view;

[0018] Figure 2 Schematic diagram of the exhaust gas purification device;

[0019] Figure 3 This is a schematic diagram of the exhaust gas entering the component structure;

[0020] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the tower cavity;

[0021] Figure 5 Schematic diagram of the spray assembly structure.

[0022] In the figure: 1. Base plate; 2. Support column; 3. Air inlet pipe; 4. Tower cavity; 5. Negative pressure motor; 6. Rotating shaft; 7. Fan blade; 8. Driving wheel; 9. Connecting pipe; 10. Driven wheel; 11. Belt; 12. Blowing head; 13. Filter plate; 14. Brush; 15. Dust hopper; 16. Baffle; 17. Storage box; 18. Delivery pipe; 19. Pump; 20. Feed pipe; 21. Straight pipe; 22. Spray hole; 23. Packing layer; 24. Exhaust pipe; 25. Activated carbon mesh; 26. Side ears; 27. Limit pin; 28. Movable door; 29. ​​Handle; 30. Control panel. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-3 The figure shows a calcining furnace exhaust gas purification device, comprising a base plate 1, a support column 2 is installed at one end of the top side of the base plate 1, an air intake pipe 3 is installed on the top of the support column 2, a tower cavity 4 is installed at the other end of the top side of the base plate 1, a negative pressure motor 5 is installed on the outside of the bottom end of the tower cavity 4, a rotating shaft 6 is installed at the output end of the negative pressure motor 5, one end of the rotating shaft 6 extends to the interior of the air intake pipe 3, three fan blades 7 are installed at the middle end of the rotating shaft 6, a driving wheel 8 is installed on the outer wall of one end of the rotating shaft 6, a connecting pipe 9 is rotatably installed inside one end of the air intake pipe 3, one end of the connecting pipe 9 movably penetrates the interior of the tower cavity 4, a driven wheel 10 is installed on the outside of one end of the connecting pipe 9, the driving wheel 8 and the driven wheel 10 are connected by a belt 11, and five groups of five blowing heads 12 are equidistantly installed on the other end of the connecting pipe 9;

[0025] The inner wall of the other end of the air intake pipe 3 is located on the outside of the rotating shaft 6 and a filter plate 13 is installed. The other end of the rotating shaft 6 is installed with a brush 14 that contacts the filter plate 13. The outer wall of the bottom side of the air intake pipe 3 is located below the filter plate 13 and a dust collecting hopper 15 is installed. A baffle 16 is slidably installed inside the bottom end of the dust collecting hopper 15, and a control panel 30 is installed on the outside of the storage box 17. During operation, in actual application, after the exhaust gas enters the tower cavity 4, it will be concentrated in certain areas and cannot be evenly contacted with the purification medium, resulting in that some harmful substances in the exhaust gas are directly discharged without being effectively treated, thereby reducing the overall purification efficiency. The negative pressure motor 5 is started, driving the rotating shaft 6 to rotate. The three fan blades 7 on the rotating shaft 6 rotate to generate negative pressure, which sucks the exhaust gas into the air intake pipe 3 and pushes it into the tower cavity 4. When passing through the filter plate 13, the filter plate 13 intercepts large particles of impurities in the exhaust gas. To prevent these impurities from entering the tower cavity 4 and affecting the subsequent purification effect, the driving wheel 8 installed on the outer wall of one end of the rotating shaft 6 rotates accordingly, and the driving wheel 8 drives the driven wheel 10 to rotate through the belt 11, thereby causing the connecting pipe 9 to rotate between the air intake pipe 3 and the tower cavity 4. The five groups of blowing heads 12 equidistantly installed at the other end of the connecting pipe 9 blow the exhaust gas evenly in different directions in the tower cavity 4 during the rotation process, increasing the injection range of the exhaust gas in the tower cavity 4, so that the exhaust gas can more fully contact the purification medium in the tower cavity 4, thereby improving the purification efficiency. The plate brush 14 installed at the other end of the rotating shaft 6 continuously cleans the large particles of impurities intercepted on the filter plate 13 as the rotating shaft 6 rotates. The cleaned impurities fall into the dust hopper 15 on the outer wall of the bottom side of the air intake pipe 3. The baffle 16 slidably installed inside the bottom end of the dust hopper 15 can be pulled out when impurities need to be cleaned, thereby facilitating the discharge of impurities.

[0026] See also Figure 1 、 2 As shown in Figures 4 and 5, the top side of the bottom plate 1 is installed on a storage box 17. The interior of the storage box 17 is connected to a delivery pipe 18. A pump 19 is installed on the outside of the bottom end of the delivery pipe 18. The middle and top ends of the delivery pipe 18 pass through the tower cavity 4 and are connected to a feeding pipe 20. Several straight pipes 21 are evenly installed on the outside of the feeding pipe 20. Spray holes 22 are opened inside the straight pipes 21. The inner walls of the tower cavity 4 are respectively provided with packing layers 23 below the straight pipes 21.

[0027] The top of the tower cavity 4 is connected to an air outlet pipe 24, the interior of the air outlet pipe 24 is provided with a through slot, an activated carbon mesh plate 25 is movably installed inside the through slot, and a side ear 26 is installed on the outside of the air outlet pipe 24, and a limit pin 27 is movably installed inside the side ear 26 that penetrates the activated carbon mesh plate 25;

[0028] A movable door 28 is installed on the outside of the tower cavity 4 through a hinge, and a handle 29 is installed on the outside of the movable door 28; during operation, the raw material of the honeycomb catalyst contains nitrogen during the calcination process. Under high-temperature calcination conditions, the nitrogen in the raw material will react with oxygen to generate nitrogen oxides. If not treated, it will cause corrosion and damage to the soil and water bodies. Therefore, an exhaust gas purification device is needed. The solution in the storage box 17 is a sodium hydroxide solution. Under the action of the pump 19, the sodium hydroxide solution is transported to the feed pipe 20 and the straight pipe 21 through the delivery pipe 18, and then evenly sprayed out from the spray hole 22 to contact with the exhaust gas, so that the sodium hydroxide solution and water vapor exhaust gas such as NOx are neutralized, and the filler layer 23 further increases the contact area and contact time between the exhaust gas and the purification medium, thereby improving the purification effect of harmful substances such as NOx and realizing chemical purification;

[0029] The purified exhaust gas rises to the top of the tower cavity 4, passes through the activated carbon mesh plate 25 to further adsorb the pollutants remaining in the exhaust gas, and is finally discharged through the exhaust pipe 24. When the activated carbon mesh plate 25 needs to be cleaned or replaced, the limit pin 27 that passes through the activated carbon mesh plate 25 inside the side ear 26 is pulled out, and the activated carbon mesh plate 25 can be easily removed for cleaning or replacement.

[0030] Working principle: The negative pressure motor 5 starts, driving the rotating shaft 6 to rotate. The three fan blades 7 on the rotating shaft 6 rotate to generate negative pressure, sucking the exhaust gas into the air intake pipe 3 and pushing it into the tower cavity 4. When passing through the filter plate 13, the filter plate 13 intercepts large particles of impurities in the exhaust gas to prevent these impurities from entering the tower cavity 4 and affecting the subsequent purification effect. As the rotating shaft 6 rotates, the driving wheel 8 installed on the outer wall of one end thereof rotates accordingly. The driving wheel 8 drives the driven wheel 10 to rotate through the belt 11, thereby rotating the connecting pipe 9 between the air intake pipe 3 and the tower cavity 4. The other end of the connecting pipe 9 is equidistantly arranged. The five groups of blowing heads 12 blow the exhaust gas evenly in different directions in the tower cavity 4 during rotation, thereby increasing the spray range of the exhaust gas in the tower cavity 4, allowing the exhaust gas to more fully contact the purification medium in the tower cavity 4, and improving the purification efficiency. The brush 14 installed at the other end of the rotating shaft 6 continuously cleans the large particles of impurities intercepted on the filter plate 13 as the rotating shaft 6 rotates. The cleaned impurities fall into the dust hopper 15 on the outer wall of the bottom side of the air inlet pipe 3. The baffle 16 slidably installed inside the bottom end of the dust hopper 15 can be pulled out when impurities need to be cleaned, thereby facilitating the discharge of impurities.

[0031] The solution in the storage tank 17 is a sodium hydroxide solution. Under the action of the pump 19, the sodium hydroxide solution is transported to the feed pipe 20 and the straight pipe 21 through the delivery pipe 18, and then evenly sprayed out from the spray hole 22 to contact the exhaust gas, so that the sodium hydroxide solution and the water vapor exhaust gas such as NOx are neutralized. The packing layer 23 further increases the contact area and contact time between the exhaust gas and the purification medium, thereby improving the purification effect of harmful substances such as NOx and achieving chemical purification.

[0032] The purified exhaust gas rises to the top of the tower cavity 4, passes through the activated carbon mesh plate 25 to further adsorb the pollutants remaining in the exhaust gas, and is finally discharged through the exhaust pipe 24. When the activated carbon mesh plate 25 needs to be cleaned or replaced, the limit pin 27 that passes through the activated carbon mesh plate 25 inside the side ear 26 is pulled out, and the activated carbon mesh plate 25 can be easily removed for cleaning or replacement.

[0033] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A calcining furnace exhaust gas purification device, characterized in that: The invention comprises a bottom plate (1), a support column (2) is installed at one end of the top side of the bottom plate (1), an air intake pipe (3) is installed at the top end of the support column (2), a tower cavity (4) is installed at the other end of the top side of the bottom plate (1), a negative pressure motor (5) is installed on the outside of the bottom end of the tower cavity (4), a rotating shaft (6) is installed at the output end of the negative pressure motor (5), one end of the rotating shaft (6) extends to the interior of the air intake pipe (3), and three fan blades (7) are installed at the middle end of the rotating shaft (6). ), a driving wheel (8) is installed on the outer wall of one end of the rotating shaft (6), a connecting pipe (9) is rotatably installed inside one end of the air inlet pipe (3), one end of the connecting pipe (9) is movably inserted into the interior of the tower cavity (4), a driven wheel (10) is installed on the outer side of one end of the connecting pipe (9), the driving wheel (8) and the driven wheel (10) are connected by a belt (11), and five groups of five blowing heads (12) are equidistantly installed at the other end of the connecting pipe (9).

2. The calcining furnace exhaust gas purification device according to claim 1, characterized in that: A filter plate (13) is installed on the inner wall of the other end of the air inlet duct (3) outside the rotating shaft (6), and a brush (14) in contact with the filter plate (13) is installed on the other end of the rotating shaft (6). A dust collecting hopper (15) is installed on the outer wall of the bottom side of the air inlet duct (3) below the filter plate (13), and a baffle (16) is slidably installed inside the bottom end of the dust collecting hopper (15).

3. The calcining furnace exhaust gas purification device according to claim 2, characterized in that: The top side of the bottom plate (1) is mounted on a storage box (17), the interior of the storage box (17) is connected to a delivery pipe (18), the outer side of the bottom end of the delivery pipe (18) is equipped with a pump (19), the middle end and the top end of the delivery pipe (18) pass through the tower cavity (4) and are connected to a feed pipe (20), the outer side of the feed pipe (20) is evenly mounted with a plurality of straight pipes (21), the interior of each of the straight pipes (21) is provided with a spray hole (22), and the inner wall of the tower cavity (4) is respectively equipped with a packing layer (23) below the straight pipe (21).

4. The calcining furnace exhaust gas purification device according to claim 3, characterized in that: The top of the tower cavity (4) is connected to an air outlet pipe (24), a through slot is provided inside the air outlet pipe (24), an activated carbon mesh plate (25) is movably installed inside the through slot, a side ear (26) is installed outside the air outlet pipe (24), and a limit pin (27) is movably installed inside the side ear (26) that penetrates the activated carbon mesh plate (25).

5. The calcining furnace exhaust gas purification device according to claim 4, characterized in that: A movable door (28) is installed on the outside of the tower cavity (4) via a hinge, and a handle (29) is installed on the outside of the movable door (28).

6. The calcining furnace exhaust gas purification device according to claim 5, characterized in that: A control panel (30) is installed on the outside of the storage box (17), and the control panel (30) is used to control the operation of electrical components inside the device.

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