Desulfurization and denitrification device for high-temperature composite filter bag production

Abstract

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a desulfurization and denitrification device for producing a high-temperature composite filter bag, which comprises a base, a box body is mounted on the base through a fixing frame, a fixing plate is mounted on the inner wall of the box body, two sliding chutes are symmetrically formed in the bottom side of the fixing plate, iron sheets are mounted on the side walls of the sliding plates, and the iron sheets are mounted on the side walls of the sliding plates. A pulse electromagnet is installed on the inner wall of the box body, a high-temperature composite filter bag is installed on the frame, gypsum particles in flue gas are filtered and intercepted through the high-temperature composite filter bag, in the process, the frame drives the high-temperature composite filter bag to shake at high frequency, and the gypsum particles on the high-temperature composite filter bag shake at high frequency under the action of vibration force. According to the structure, gypsum particles on the high-temperature composite filter bag can be continuously cleaned, the gypsum particles on the high-temperature composite filter bag are prevented from being hardened, the cleaning effect of the high-temperature composite filter bag is improved, and the filterability of the high-temperature composite filter bag is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically a desulfurization and denitrification device for the production of high-temperature composite filter bags. Background Technology

[0002] Industrial production often generates a large amount of toxic waste gas, which is mostly composed of sulfur nitrates. As we all know, sulfur nitrates are the source of acid rain. If they are discharged directly into the air without treatment, they will cause irreversible damage to the atmospheric environment. Therefore, before the waste gas is discharged, it is necessary to use desulfurization and denitrification devices to treat the waste gas for desulfurization and denitrification.

[0003] Chinese patent CN 219879544 U discloses a high-temperature composite filter bag desulfurization and denitrification device, including a base with a filter bag dust collection box connected to the upper side. An installation mesh frame is connected inside the filter bag dust collection box, and several supporting steel frames are connected to the outer side of the installation mesh frame. Filter bags are placed on the outer side of the supporting steel frames. An air inlet pipe is provided on the side of the filter bag dust collection box, and a centrifugal fan is installed on the upper side of the base, with an exhaust pipe connected to the outer side of the centrifugal fan. This invention, by setting up a connecting block, a ventilation groove, a first liquid delivery pipe, a second liquid delivery pipe, an atomizing nozzle, a first liquid pump, a purified liquid tank, a drain pipe, an air inlet, and a storage tank, can greatly increase the flow time of toxic waste gas inside the ventilation groove, thereby allowing the toxic waste gas to fully contact the desulfurization and denitrification agent, thus significantly improving the purification efficiency of this composite filter bag desulfurization and denitrification device for toxic waste gas.

[0004] Existing desulfurization and denitrification devices struggle to clean gypsum particles from high-temperature composite filter bags in a timely manner when purifying sulfur oxides and nitrogen oxides in flue gas. These gypsum particles tend to clump together, resulting in poor cleaning of the high-temperature composite filter bags and affecting their filtration performance. Therefore, a desulfurization and denitrification device for the production of high-temperature composite filter bags is proposed to address these issues. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a desulfurization and denitrification device for the production of high-temperature composite filter bags.

[0006] The technical solution adopted by this utility model to solve its technical problem is a desulfurization and denitrification device for high-temperature composite filter bag production, including a base, a box body mounted on the base via a fixing frame, an ash hopper mounted on the bottom side of the box body, a second air guide pipe and a third air guide pipe respectively connected to the side wall of the box body, a fixing plate mounted on the inner wall of the box body, an exhaust chamber above the fixing plate, a dust removal chamber below the fixing plate, two symmetrical sliding grooves opened on the bottom side of the fixing plate, sliding strips fitted in the sliding grooves, a sliding plate mounted on the bottom side of the sliding strips, an iron plate mounted on the side wall of the sliding plate, multiple springs installed between the sliding plate and the inner wall of the box body, a pulse electromagnet mounted on the inner wall of the box body, multiple air holes opened on the fixing plate and the sliding plate, and a frame mounted on the bottom side of the sliding plate. High-temperature composite filter bags are installed on the frame. Multiple ammonia pipes are installed on the top plate of the housing, and multiple SCR catalysts are fixedly installed on the outer wall of the ammonia pipes. A control panel is installed on the side wall of the housing. The control panel is connected to a pulse electromagnet through an internal circuit. Gypsum particles and flue gas enter the housing. The high-temperature composite filter bags filter and intercept the gypsum particles in the flue gas. During this process, the frame drives the high-temperature composite filter bags to shake at high frequency. Under the action of vibration, the gypsum particles on the high-temperature composite filter bags are shaken off and then discharged from the ash hopper. This structure can continuously clean the gypsum particles on the high-temperature composite filter bags, avoid the gypsum particles on the high-temperature composite filter bags from caking, and improve the cleaning effect of the high-temperature composite filter bags and the filtration performance of the high-temperature composite filter bags.

[0007] Preferably, a deacidification tower is mounted on the base, a first air guide pipe is mounted on one side of the deacidification tower, and the top of the deacidification tower is connected to a second air guide pipe. A Venturi structure is mounted on the first air guide pipe, the Venturi structure including a contraction tube, a throat, and an expansion tube. The contraction tube is fixedly connected to the throat, the throat is fixedly connected to the expansion tube, and the expansion tube is fixedly connected to the first air guide pipe. An air inlet pipe is connected to the contraction tube. A third air guide pipe is connected to the other end of the third air guide pipe, and a fourth air guide pipe is connected to the induced draft fan. The other end of the fourth air guide pipe is connected to a smoke generator. The chimney is fixedly installed on the base. Flue gas and sodium bicarbonate powder enter the deacidification tower and fully contact to undergo a chemical reaction, generating gypsum particles. The gypsum particles and flue gas enter the housing through the second gas guide pipe. High-temperature composite filter bags filter and intercept the gypsum particles in the flue gas. Then, under the action of the SCR catalyst, ammonia gas sprayed from the ammonia pipe fully reacts with the flue gas, reducing nitrogen oxides in the flue gas to nitrogen and water. This achieves dust removal and denitrification of the flue gas. The integrated design of the dust removal structure and the denitrification structure helps to reduce the footprint of the equipment.

[0008] The advantages of this utility model are:

[0009] 1. This utility model allows gypsum particles and flue gas to enter the chamber. The high-temperature composite filter bag filters and intercepts the gypsum particles in the flue gas. During this process, the frame drives the high-temperature composite filter bag to shake frequently. Under the action of vibration, the gypsum particles on the high-temperature composite filter bag are shaken off and then discharged from the ash hopper. This structure can continuously clean the gypsum particles on the high-temperature composite filter bag, avoid the gypsum particles on the high-temperature composite filter bag from caking, and improve the cleaning effect of the high-temperature composite filter bag and the filtration performance of the high-temperature composite filter bag.

[0010] 2. This invention utilizes the chemical reaction that occurs when flue gas and sodium bicarbonate powder come into full contact inside the desulfurization tower, generating gypsum particles. The gypsum particles and flue gas enter the chamber together through the second gas guide pipe. A high-temperature composite filter bag filters and intercepts the gypsum particles in the flue gas. Then, under the action of the SCR catalyst, ammonia gas sprayed from the ammonia pipe reacts fully with the flue gas, reducing nitrogen oxides in the flue gas to nitrogen and water. This achieves dust removal and denitrification of the flue gas. The integrated design of the dust removal and denitrification structures helps to reduce the footprint of the equipment. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the box;

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure at the fixed plate.

[0015] Figure 4 A three-dimensional structural diagram of the pulse electromagnet.

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of a high-temperature composite filter bag.

[0017] In the diagram: 1. Base; 2. Box body; 3. Ash hopper; 4. Second air guide pipe; 5. Third air guide pipe; 6. Fixing plate; 7. Slide groove; 8. Sliding strip; 9. Sliding plate; 10. Iron sheet; 11. Spring; 12. Pulse electromagnet; 14. Control panel; 15. Deacidification tower; 16. First air guide pipe; 17. Contraction pipe; 18. Throat pipe; 19. Expansion pipe; 20. Air inlet pipe; 21. Exhaust fan; 22. Chimney; 23. Frame; 24. High-temperature composite filter bag; 25. Mounting bracket; 26. SCR catalyst. Detailed Implementation

[0018] 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 scope of protection of the present utility model.

[0019] Please see Figure 1-5 As shown, a desulfurization and denitrification device for the production of high-temperature composite filter bags includes a base 1, a housing 2 mounted on the base 1 via a fixing frame, an ash hopper 3 mounted on the bottom side of the housing 2, a second air guide pipe 4 and a third air guide pipe 5 connected to the side wall of the housing 2 respectively, a fixing plate 6 mounted on the inner wall of the housing 2, an exhaust chamber above the fixing plate 6 and a dust removal chamber below the fixing plate 6, two symmetrical sliding grooves 7 opened on the bottom side of the fixing plate 6, sliding strips 8 assembled in the sliding grooves 7, sliding plates 9 mounted on the bottom side of the sliding strips 8, iron plates 10 mounted on the side wall of the sliding plates 9, multiple springs 11 installed between the sliding plates 9 and the inner wall of the housing 2, a pulse electromagnet 12 mounted on the inner wall of the housing 2, multiple air holes opened on the fixing plate 6 and the sliding plates 9, a frame 23 mounted on the bottom side of the sliding plates 9, high-temperature composite filter bags 24 mounted on the frame 23, and multiple ammonia pipes 25 mounted on the top plate of the housing 2. Multiple SCR catalysts 26 are fixedly installed on the outer wall, and a control panel 14 is installed on the side wall of the housing 2. The control panel 14 is connected to the pulse electromagnet 12 through an internal circuit. During operation, the existing desulfurization and denitrification device has difficulty cleaning the gypsum particles on the high-temperature composite filter bag 24 in time when purifying sulfur oxides and nitrogen oxides in flue gas. The gypsum particles on the high-temperature composite filter bag 24 are prone to caking, resulting in poor cleaning effect of the high-temperature composite filter bag 24 and affecting the filtration performance of the high-temperature composite filter bag 24. The gypsum particles and flue gas enter the housing 2 together from the second air guide pipe 4. The high-temperature composite filter bag 24 filters and intercepts the gypsum particles in the flue gas. Then, under the action of the SCR catalyst 26, the ammonia gas sprayed from the ammonia pipe 25 reacts fully with the flue gas, reducing the nitrogen oxides in the flue gas to nitrogen and water, thus achieving dust removal and denitrification of the flue gas.

[0020] During this process, a sinusoidal current is passed through the control panel 14 into the pulse electromagnet 12 via a wire, magnetizing the pulse electromagnet 12. The moment the pulse electromagnet 12 generates magnetic force, it attracts the iron plate 10, causing it to move. The iron plate 10 then moves the sliding plate 9 horizontally to the right, which in turn moves the frame 23 horizontally to the right. The frame 23 then moves the high-temperature composite filter bag 24 horizontally to the right. Afterward, the magnetic force on the pulse electromagnet 12 disappears. Under the thrust of the spring 11, the spring 11 pushes the sliding plate 9 horizontally to the left, which in turn moves the frame 23 horizontally to the left. The frame 23 then moves the high-temperature composite filter bag 24 horizontally to the right. The composite filter bag 24 moves horizontally to the left. Due to the extremely high switching frequency of the magnetic field of the pulse electromagnet 12, the frame 23 drives the high-temperature composite filter bag 24 to shake at a high frequency. Under the action of vibration, the gypsum particles on the high-temperature composite filter bag 24 are shaken off and then discharged from the ash hopper 3. This structure can continuously clean the gypsum particles on the high-temperature composite filter bag 24, avoid the gypsum particles on the high-temperature composite filter bag 24 from caking, and affect the filtration performance of the high-temperature composite filter bag 24. This is beneficial to improving the cleaning effect of the high-temperature composite filter bag 24 and improving its filtration performance.

[0021] Please see Figure 1 As shown, a deacidification tower 15 is installed on the base 1. A first air guide pipe 16 is installed on one side of the deacidification tower 15. The top side of the deacidification tower 15 is connected to a second air guide pipe 4. A venturi structure is installed on the first air guide pipe 16. The venturi structure includes a contraction pipe 17, a throat 18, and an expansion pipe 19. The contraction pipe 17 is fixedly connected to the throat 18, the throat 18 is fixedly connected to the expansion pipe 19, and the expansion pipe 19 is fixedly connected to the first air guide pipe 16. An air inlet pipe 20 is connected to the contraction pipe 17. A blower 21 is connected to the other end of a third air guide pipe 5. A fourth air guide pipe is connected to the blower 21. A chimney 22 is fixedly installed on the base 1. During operation, the existing... When purifying sulfur oxides and nitrogen oxides in flue gas, desulfurization and denitrification devices typically require multiple devices to perform desulfurization, dust removal, and denitrification separately. The numerous and large-volume devices result in a large footprint. Flue gas enters the contraction pipe 17, while sodium bicarbonate powder enters from the inlet pipe 20 into the contraction pipe 17. The flue gas and sodium bicarbonate powder are then thoroughly mixed as they pass through the throat pipe 18. The mixture then enters the first gas guide pipe 16 through the expansion pipe 19, and subsequently enters the desulfurization tower 15. The flue gas and sodium bicarbonate powder come into full contact and undergo a chemical reaction, generating gypsum particles. These gypsum particles and flue gas then enter the housing 2 through the second gas guide pipe 4.

[0022] The high-temperature composite filter bag 24 filters and intercepts gypsum particles in the flue gas. Then, under the action of the SCR catalyst 26, the ammonia gas sprayed from the ammonia pipe 25 reacts fully with the flue gas, reducing the nitrogen oxides in the flue gas to nitrogen and water, thus realizing the dust removal and denitrification of the flue gas. The integrated design of the dust removal structure and the denitrification structure can reduce the footprint of the equipment.

[0023] Afterwards, under the action of the induced draft fan 21, the flue gas from desulfurization and denitrification is guided into the chimney 22 and then discharged from the chimney 22, thus achieving the purification and emission of the flue gas. In this structure, the dust removal structure and the denitrification structure are integrated into one design, which helps to reduce the footprint of the equipment.

[0024] Working principle: Existing desulfurization and denitrification devices, when purifying sulfur oxides and nitrogen oxides in flue gas, struggle to promptly clean the gypsum particles on the high-temperature composite filter bag 24. These particles tend to clump, resulting in poor cleaning and affecting the filter's filtration efficiency. The gypsum particles and flue gas enter the housing 2 through the second air duct 4. The high-temperature composite filter bag 24 filters and intercepts the gypsum particles. Then, under the action of the SCR catalyst 26, ammonia gas sprayed from the ammonia pipe 25 reacts fully with the flue gas, reducing nitrogen oxides to nitrogen and water, thus achieving dust removal and denitrification of the flue gas. During this process, the control panel 14 controls the... A current is passed through a wire into the pulse electromagnet 12, magnetizing it. The instant the pulse electromagnet 12 generates a magnetic force, it attracts the iron plate 10, which moves the iron plate 10 towards it. The iron plate 10 then moves the sliding plate 9 horizontally to the right, which in turn moves the frame 23 horizontally to the right. The frame 23 then moves the high-temperature composite filter bag 24 horizontally to the right. Afterward, the magnetic force on the pulse electromagnet 12 disappears. Under the push of the spring 11, the spring 11 pushes the sliding plate 9 horizontally to the left, which in turn moves the frame 23 horizontally to the left. The frame 23 then moves the high-temperature composite filter bag 24 horizontally to the left. Because the switching frequency of the magnetic field generation and disappearance of the pulse electromagnet 12 is extremely high, the frame 23 causes the high-temperature composite filter bag 24 to vibrate at a high frequency. Under the action of vibration, the gypsum particles on the high-temperature composite filter bag 24 are shaken off and discharged from the ash hopper 3. This structure can continuously clean the gypsum particles on the high-temperature composite filter bag 24, preventing the gypsum particles from caking and affecting the filtration performance of the high-temperature composite filter bag 24. This is beneficial to improving the cleaning effect of the high-temperature composite filter bag 24 and improving its filtration performance. Existing desulfurization and denitrification devices usually require multiple devices to perform desulfurization, dust removal, and denitrification treatment of flue gas when purifying sulfur oxides and nitrogen oxides in flue gas. The devices are numerous and large in size, resulting in a large footprint. Sodium bicarbonate enters the contraction pipe 17 through the flue gas. The powder enters the contraction pipe 17 from the inlet pipe 20. Then, the flue gas and sodium bicarbonate powder are fully mixed when passing through the throat pipe 18. After that, it enters the first guide pipe 16 from the expansion pipe 19. Then, it enters the deacidification tower 15 from the first guide pipe 16. The flue gas and sodium bicarbonate powder come into full contact and react chemically to generate gypsum particles. The gypsum particles and flue gas enter the housing 2 together from the second guide pipe 4. The high-temperature composite filter bag 24 filters and intercepts the gypsum particles in the flue gas. Then, under the action of the SCR catalyst 26, the ammonia gas sprayed from the ammonia pipe 25 reacts fully with the flue gas, reducing the nitrogen oxides in the flue gas to nitrogen and water. This realizes the dust removal and denitrification of the flue gas. The integrated design of the dust removal structure and the denitrification structure can reduce the footprint of the equipment.Subsequently, under the action of induced draft fan 21, the desulfurized and denitrified flue gas is guided into chimney 22 and then discharged from chimney 22, achieving purified emission of the flue gas. In this structure, the dust removal structure and denitrification structure are integrated into a single design, which helps to reduce the footprint of the equipment.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A desulfurization and denitrification device for high-temperature composite filter bag production, characterized by: Includes a base (1), on which a box (2) is mounted via a fixing bracket. A dust hopper (3) is mounted on the bottom side of the box (2). A second air duct (4) and a third air duct (5) are connected to the side walls of the box (2). A fixing plate (6) is mounted on the inner wall of the box (2). Above the fixing plate (6) is an exhaust chamber, and below the fixing plate (6) is a dust removal chamber. Two symmetrical sliding grooves (7) are opened on the bottom side of the fixing plate (6). Sliding strips (8) are fitted inside the sliding grooves (7), and sliding plates (9) are mounted on the bottom side of the sliding strips (8). Iron plates (10) are installed on the side wall of the sliding plate (9). Multiple springs (11) are installed between the sliding plate (9) and the inner wall of the box (2). A pulse electromagnet (12) is installed on the inner wall of the box (2). Multiple air holes are opened on the fixed plate (6) and the sliding plate (9). A frame (23) is installed on the bottom side of the sliding plate (9). A high-temperature composite filter bag (24) is installed on the frame (23). Multiple ammonia pipes (25) are installed on the top plate of the box (2). Multiple SCR catalysts (26) are fixedly installed on the outer wall of the ammonia pipes (25).

2. The device for removing sulfur and nitrogen oxides according to claim 1, characterized in that: A control panel (14) is installed on the side wall of the housing (2), and the control panel (14) is connected to the pulse electromagnet (12) through an internal circuit.

3. The device for removing sulfur and nitrogen oxides according to claim 1, characterized in that: A deacidification tower (15) is installed on the base (1), a first gas guide pipe (16) is installed on one side of the deacidification tower (15), and the top side of the deacidification tower (15) is connected to a second gas guide pipe (4).

4. The device for removing sulfur and nitrogen oxides according to claim 3, characterized in that: The first air duct (16) is equipped with a venturi structure, which includes a constriction tube (17), a throat tube (18), and a dilator tube (19).

5. The device for removing sulfur and nitrogen oxides according to claim 4, characterized in that: The constriction tube (17) is fixedly connected to the throat tube (18), the throat tube (18) is fixedly connected to the expansion tube (19), the expansion tube (19) is fixedly connected to the first air guide tube (16), and an air inlet tube (20) is connected to the constriction tube (17).

6. The desulfurization and denitrification device for high-temperature composite filter bag production according to claim 1, characterized in that: The third air duct (5) is connected to a blower (21) at the other end. The blower (21) is connected to a fourth air duct. The fourth air duct is connected to a chimney (22) at the other end. The chimney (22) is fixedly installed on the base (1).

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