Denitration and dust removal device for dust removal filter bag

Abstract

The invention discloses a denitration and dust removal device for a dust removal filter bag, and relates to the technical field of dust removal filter bags, the denitration and dust removal device for the dust removal filter bag comprises a supporting disc, a supporting frame sleeved with a filter bag is fixedly arranged on the supporting disc, one end of the supporting frame is provided with a fixing block, and the fixing block is communicated with an air outlet pipeline; a buffer cabin is arranged above the supporting disc, the lower portion of the buffer cabin is communicated with a liquid inlet pipeline used for introducing ammonia water into the buffer cabin, the upper portion of the buffer cabin is communicated with a connecting pipeline, the connecting pipeline is provided with an atomizing nozzle used for spraying ammonia water mist outwards, and an adjusting mechanism used for circulating the ammonia water is arranged above the buffer cabin; the adjusting mechanism comprises an adjusting cabin, a lifting assembly is arranged in the adjusting cabin, and the lifting assembly is used for guiding ammonia water in the adjusting cabin into the buffer cabin. According to the denitration and dust removal device for the dust removal filter bag, ammonia water can be used for denitration of waste gas, the device can operate in an overload mode, and the denitration effect of denitration of waste gas containing a large amount of nitric oxide is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal filter bags, in particular to a denitrification and dust removal device for dust removal filter bags. Background Art

[0002] In modern industrial production, with the increasing awareness of environmental protection and the continuous improvement of emission standards, efficient purification of industrial waste gas has become an unavoidable responsibility for enterprises. Especially in heavily polluting industries such as coal-fired power plants, steel smelting, and cement manufacturing, pollutants such as dust, sulfur dioxide, and nitrogen oxides in waste gas pose a serious threat to the environment and human health. Therefore, the development and application of efficient and reliable dust removal and denitrification technologies are of great significance to reducing pollutant emissions and improving air quality.

[0003] As the core component of the dust removal device, the performance of the dust filter bag is directly related to the dust removal efficiency and service life. Traditional dust filter bags mainly focus on the capture of dust, but have limited processing capacity for gaseous pollutants in exhaust gas, such as nitrogen oxides. With the tightening of environmental protection policies, the single dust removal function can no longer meet the current environmental protection requirements, and the combination of dust removal and denitrification technology has become an inevitable trend.

[0004] Denitration and dust removal devices came into being, which integrate the two functions of dust removal and denitration in one, aiming to achieve efficient purification of exhaust gas. The device converts nitrogen oxides in exhaust gas into harmless or low-toxic nitrogen and water by chemical or physical methods by adding a denitration module before or after the dust removal filter bag, thereby achieving the purpose of reducing nitrogen oxide emissions.

[0005] At present, when factories use ammonia water to denitrify exhaust gas, ammonia water is not easy to recycle, and when the exhaust gas contains a large amount of nitrogen oxides, the existing denitrification and dust removal equipment cannot operate at overload, which will result in insufficient amount of ammonia water sprayed, thereby reducing the denitrification effect.

[0006] Therefore, in view of the above problems, it is necessary for the applicant to design a denitrification and dust removal device for dust removal filter bags to solve the problems. Summary of the invention

[0007] The object of the present invention is to provide a denitrification and dust removal device for a dust removal filter bag to solve the problems raised by the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a denitrification and dust removal device for a dust filter bag, comprising a support plate, and a support frame is fixedly arranged on the support plate, a filter bag is sleeved on the outer side of the support frame, and the filter bag is used to filter the dust blown from the outside to the inside, a fixed block is fixedly arranged at one end of the support frame away from the support plate, and an air outlet pipe is connected to the fixed block, a buffer chamber is arranged above the support plate, a liquid inlet pipe is connected below the buffer chamber, and the liquid inlet pipe is used to introduce ammonia water into the buffer chamber, and the buffer chamber is connected near the center above There is a connecting pipe, and an atomizing nozzle for spraying ammonia mist outward is arranged on the connecting pipe. An adjusting mechanism is arranged above the cache chamber, and the adjusting mechanism is used for circulating ammonia. The adjusting mechanism includes a adjusting chamber, and a sealing cover is arranged on the adjusting chamber. A lifting component is arranged inside the adjusting chamber, and the lifting component is used to guide the ammonia in the adjusting chamber into the cache chamber and simultaneously adjust the flow of ammonia entering the cache chamber. An extension pipe is connected to the top of the adjusting chamber, and a cache cylinder is fixedly connected to the end of the extension pipe away from the adjusting chamber, and the cache cylinder is fixedly connected to the connecting pipe.

[0009] Preferably, the lifting assembly includes a hollow sleeve penetrating the inside of the regulating cabin and the buffer cabin, a lifting cylinder is slidably arranged inside the hollow sleeve, and a water-permeable hole is arranged on the lifting cylinder.

[0010] By adopting the above technical solution, during use, as the pressure in the regulating cabin and the cache cabin changes, the lifting cylinder will be pushed to move. When the lifting cylinder moves to the point where the water hole is inside the cache cabin, the ammonia water in the regulating cabin flows into the cache cabin through the water hole, thereby recycling the ammonia water.

[0011] Preferably, a fixing plate is fixedly provided at the lower end of the lifting cylinder, and the diameter of the fixing plate is larger than the inner diameter of the hollow sleeve; a limiting plate is fixedly provided at one end of the lifting cylinder away from the fixing plate, and the diameter of the limiting plate is larger than the inner diameter of the hollow sleeve.

[0012] By adopting the above technical solution, the fixing plate and the limiting plate are used to prevent the lifting cylinder from being separated from the hollow sleeve.

[0013] Preferably, a return spring is fixedly arranged below the fixed plate, and one end of the return spring away from the fixed plate is fixedly connected to the cache compartment.

[0014] By adopting the above technical solution, the fixing plate is pushed by a return spring with elastic force, so that when the pressure in the regulating cabin is too small, the water permeable hole is located inside the regulating cabin.

[0015] Preferably, a connecting rod is fixedly provided on the fixed plate, a conical piston is fixedly provided on one end of the connecting rod away from the fixed plate, and the conical piston is used to adjust the liquid inlet amount of the liquid inlet pipeline.

[0016] By adopting the above technical scheme, when the amount of ammonia water in the regulating cabin increases, the limit plate will be squeezed down, and the descent of the limit plate will drive the lifting cylinder to move, the movement of the lifting cylinder will drive the fixed plate to move, the movement of the fixed plate will drive the connecting rod to move, and the movement of the connecting rod will drive the conical piston to move. The conical piston will block the liquid inlet of part of the liquid inlet pipe, which will reduce the liquid inlet amount of the liquid inlet pipe, thereby balancing the amount of ammonia water in the buffer cabin, making it easier for the atomizing nozzle to spray ammonia water mist continuously and evenly.

[0017] Preferably, a connecting ring is fixedly provided on the outer side of the connecting pipe, a hollow tube is fixedly connected to the connecting ring, and one end of the hollow tube away from the connecting ring penetrates into the regulating cabin for balancing the water level.

[0018] By adopting the above technical solution, the connecting ring and the hollow tube are filled with ammonia water. When in use, the siphon effect is utilized to make the ammonia water levels in multiple regulating cabins consistent.

[0019] Preferably, a guide rod is fixedly provided on the inner top surface of the cache cylinder, and a limit plate is fixedly provided at one end of the guide rod, a lifting plate is slidably provided on the guide rod, and the lifting plate is slidably connected to the inner surface wall of the cache cylinder, a sealing plate is fixedly provided below the lifting plate, and the sealing plate is used to seal the extension pipe.

[0020] By adopting the above technical solution, when purifying exhaust gas with low nitrogen oxide content, the device does not need to be overloaded, the pressure of the liquid inlet pipe is small, and the ammonia water will be sprayed out from the atomizing nozzle under pressure and push the lifting plate to rise along the direction of the guide rod. The low pressure of the ammonia water pressure will not be able to push the lifting plate to drive the sealing plate away from the extension pipe, which can prevent the ammonia water from entering the regulating cabin, thereby increasing the service life of the regulating cabin.

[0021] Preferably, a buffer spring is fixedly arranged above the lifting plate, and one end of the buffer spring away from the lifting plate is fixedly connected to the cache cylinder.

[0022] By adopting the above technical scheme, the elastic coefficient of the buffer spring is determined according to the actual situation. When in use, when purifying exhaust gas with low nitrogen oxide content, the blocking plate can be pushed to block the extension pipe. When purifying exhaust gas with high nitrogen oxide content, the blocking plate can be moved away from the extension pipe, thereby changing the use state of the blocking plate and reducing the use frequency of the regulating cabin. The high and low limits of the nitrogen oxide content are determined according to the actual use situation.

[0023] Preferably, a protective column is arranged inside the support frame, and a plurality of holes are opened on the protective column.

[0024] By adopting the above technical solution, dust in the exhaust gas can be further prevented from entering the interior of the protective column, thereby increasing the service life of the device.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the denitration and dust removal device for dust removal filter bags can use ammonia water to denitrate the exhaust gas, and the device can be overloaded to improve the denitration effect of denitrifying the exhaust gas containing a large amount of nitrogen oxides, and the specific contents are as follows; 1. When the denitrification and dust removal device for the dust filter bag is in use, when purifying the exhaust gas with low nitrogen oxide content, ammonia water is input from the liquid inlet pipe, and the ammonia water will enter the connecting pipe. The ammonia water in the connecting pipe will be sprayed out from the atomizing nozzle under the action of pressure and push the lifting plate to rise along the direction of the guide rod. Under the action of the elastic force of the buffer spring, the pressure of the ammonia water pressure is too small to push the lifting plate to drive the sealing plate away from the extension pipe, which can prevent the ammonia water from entering the regulating cabin, thereby increasing the service life of the regulating cabin.

[0026] 2. When the denitrification and dust removal device for the dust filter bag is in use, when purifying waste gas with high nitrogen oxide content, the ammonia water in the connecting pipe will push the sealing plate away from the extension pipe under the action of pressure, and the ammonia water will enter the regulating cabin through the extension pipe. As the pressure in the regulating cabin increases, the limit plate will be squeezed down, and the descent of the limit plate will drive the movement of the lifting cylinder, the movement of the lifting cylinder will drive the movement of the fixed plate, the movement of the fixed plate will drive the movement of the connecting rod, and the movement of the connecting rod will drive the movement of the conical piston. The conical piston will block the liquid inlet of part of the liquid inlet pipe, which will reduce the liquid inlet amount of the liquid inlet pipe, so that the amount of ammonia water in the buffer cabin is balanced, which is convenient for the atomizing nozzle to continuously and evenly spray ammonia water mist, thereby achieving overload denitrification and improving the denitrification effect of denitrifying waste gas containing a large amount of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the filter bag of the present invention; Figure 3 This is a schematic diagram of the internal three-dimensional structure of the protection column of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 The cross-sectional structure diagram of the connection between the regulating cabin and the buffer cabin of the present invention is shown in FIG. Figure 1 ; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 The cross-sectional structure diagram of the connection between the regulating cabin and the buffer cabin of the present invention is shown in FIG. Figure 2 ; Figure 8 It is a schematic diagram of the internal structure of the cache cylinder of the present invention.

[0028] In the figure: 1. support plate; 2. adjustment mechanism; 10. support frame; 11. fixed block; 12. air outlet pipe; 13. filter bag; 14. liquid inlet pipe; 15. protective column; 16. hole; 17. buffer chamber; 18. connecting pipe; 19. atomizing nozzle; 20. adjustment chamber; 21. sealing cover; 22. hollow sleeve; 23. lifting cylinder; 24. water permeable hole; 25. limit plate; 26. fixed plate; 27. reset spring; 28. connecting rod; 29. ​​conical piston; 170. extension pipe; 171. buffer cylinder; 172. connecting ring; 173. hollow tube; 1710. guide rod; 1711. limit plate; 1712. lifting plate; 1713. blocking plate; 1714. buffer spring. DETAILED DESCRIPTION

[0029] The following will be combined with the 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8 The present invention provides a technical solution: a denitrification and dust removal device for a dust filter bag, comprising a support plate 1, and a support frame 10 is fixedly arranged on the support plate 1, a filter bag 13 is sleeved on the outer side of the support frame 10, and the filter bag 13 is used to filter the dust blown from the outside to the inside, a fixed block 11 is fixedly arranged at one end of the support frame 10 away from the support plate 1, and an air outlet pipe 12 is connected to the fixed block 11, a buffer chamber 17 is arranged above the support plate 1, and a liquid inlet pipe 14 is connected below the buffer chamber 17, and the liquid inlet pipe 14 is used to introduce ammonia water into the buffer chamber 17, and a connecting pipe 18 is connected near the center of the buffer chamber 17, and The connecting pipe 18 is provided with an atomizing nozzle 19 for spraying ammonia mist outwards, an adjusting mechanism 2 is provided above the buffer chamber 17, and the adjusting mechanism 2 is used for circulating ammonia, the adjusting mechanism 2 includes a adjusting chamber 20, and a sealing cover 21 is provided on the adjusting chamber 20, a lifting assembly is provided inside the adjusting chamber 20, and the lifting assembly is used to introduce the ammonia in the adjusting chamber 20 into the buffer chamber 17 and simultaneously adjust the flow of ammonia entering the buffer chamber 17, an extension pipe 170 is connected above the adjusting chamber 20, and a cache cylinder 171 is fixedly connected to one end of the extension pipe 170 away from the adjusting chamber 20, and the cache cylinder 171 is fixedly connected to the connecting pipe 18.

[0031] Embodiment 1: according to Figure 1-Figure 4 and Figure 8As shown, a guide rod 1710 is fixedly provided on the inner top surface of the cache cylinder 171, and a limit plate 1711 is fixedly provided at one end of the guide rod 1710, a lifting plate 1712 is slidably provided on the guide rod 1710, and the lifting plate 1712 is slidably connected to the inner surface wall of the cache cylinder 171, a blocking plate 1713 is fixedly provided below the lifting plate 1712, and the blocking plate 1713 is used to block the extension pipe 170, a buffer spring 1714 is fixedly provided above the lifting plate 1712, and one end of the buffer spring 1714 away from the lifting plate 1712 is fixedly connected to the cache cylinder 171, and a protective column 15 is provided inside the support frame 10, and a plurality of holes 16 are opened on the protective column 15.

[0032] Through the above-mentioned structural design, during use, when purifying exhaust gas with low nitrogen oxide content, the filter bag 13 and the protective column 15 filter the dust in the exhaust gas, and the preliminarily treated exhaust gas will enter the protective column 15 through the hole 16. At the same time, ammonia water is input from the liquid inlet pipe 14, and the ammonia water will enter the connecting pipe 18. The ammonia water in the connecting pipe 18 will be sprayed out from the atomizing nozzle 19 under the action of pressure and push the lifting plate 1712 to rise along the direction of the guide rod 1710. Under the action of the elastic force of the buffer spring 1714, the pressure of the ammonia water pressure is too small to push the lifting plate 1712 to drive the sealing plate 1713 away from the extension pipe 170, which can prevent ammonia water from entering the regulating cabin 20, thereby improving the service life of the regulating cabin 20. The ammonia water mist sprayed from the atomizing nozzle 19 is fully integrated with the exhaust gas to purify the nitrogen oxides in the exhaust gas for denitrification, and the denitrification effect is good.

[0033] Embodiment 2: according to Figure 1-Figure 7 As shown, the lifting assembly includes a hollow sleeve 22 that penetrates the inside of the regulating cabin 20 and the buffer cabin 17, a lifting cylinder 23 is slidably arranged inside the hollow sleeve 22, and a water-permeable hole 24 is arranged on the lifting cylinder 23, a fixing plate 26 is fixedly arranged at the lower end of the lifting cylinder 23, and the diameter of the fixing plate 26 is larger than the inner diameter of the hollow sleeve 22, a limiting plate 25 is fixedly arranged at one end of the lifting cylinder 23 away from the fixing plate 26, and the diameter of the limiting plate 25 is larger than the inner diameter of the hollow sleeve 22, and a reset plate 26 is fixedly arranged below the fixing plate 26. Spring 27, and the end of the return spring 27 away from the fixed plate 26 is fixedly connected to the buffer chamber 17, a connecting rod 28 is fixedly arranged on the fixed plate 26, and a conical piston 29 is fixedly arranged on the end of the connecting rod 28 away from the fixed plate 26, and the conical piston 29 is used to adjust the liquid inlet amount of the liquid inlet pipe 14, a connecting ring 172 is fixedly arranged on the outer side of the connecting pipe 18, a hollow tube 173 is fixedly connected to the connecting ring 172, and the end of the hollow tube 173 away from the connecting ring 172 extends into the inside of the regulating chamber 20 to balance the water level.

[0034] Through the above-mentioned structural design, when in use, when purifying the exhaust gas with high nitrogen oxide content, the ammonia water in the connecting pipe 18 will push the sealing plate 1713 away from the extension pipe 170 under the action of pressure, and the ammonia water will enter the regulating cabin 20 through the extension pipe 170. As the pressure in the regulating cabin 20 increases, the limit plate 25 will be squeezed down, and the descent of the limit plate 25 will drive the lifting cylinder 23 to move, and the movement of the lifting cylinder 23 will drive the fixed plate 26 to move, and the movement of the fixed plate 26 will drive the connecting rod 28 to move, and the movement of the connecting rod 28 will drive the conical piston 29 to move. The conical piston 29 will block part of the liquid inlet of the liquid inlet pipe 14, and will reduce the liquid inlet amount of the liquid inlet pipe 14, so that the amount of ammonia water in the buffer cabin 17 is balanced, which is convenient for the atomizing nozzle 19 to continuously and evenly spray ammonia water mist, so as to achieve overload denitrification and improve the denitrification effect of denitrifying the exhaust gas containing a large amount of nitrogen oxides.

[0035] Working principle: When using the denitrification and dust removal device with the dust filter bag, when purifying the exhaust gas with low nitrogen oxide content, the filter bag 13 and the protective column 15 filter the dust in the exhaust gas, and the preliminarily treated exhaust gas will enter the protective column 15 through the hole 16. At the same time, ammonia water is input from the liquid inlet pipe 14, and the ammonia water will enter the connecting pipe 18. The ammonia water in the connecting pipe 18 will be sprayed out from the atomizing nozzle 19 under the action of pressure and push the lifting plate 1712 to rise along the direction of the guide rod 1710. Under the action of the elastic force of the buffer spring 1714, the pressure of the ammonia water pressure is too small to push the lifting plate 1712 to drive the sealing plate 1713 away from the extension pipe 170, which can prevent the ammonia water from entering the regulating cabin 20, thereby increasing the service life of the regulating cabin 20. The ammonia water mist sprayed from the atomizing nozzle 19 is fully integrated with the exhaust gas to purify the nitrogen oxides in the exhaust gas. Denitrification is carried out. When purifying the waste gas with high nitrogen oxide content, the ammonia water in the connecting pipe 18 will push the blocking plate 1713 away from the extension pipe 170 under the action of pressure, and the ammonia water will enter the regulating cabin 20 through the extension pipe 170. As the pressure in the regulating cabin 20 increases, the limit plate 25 will be squeezed down. The descent of the limit plate 25 will drive the lifting cylinder 23 to move. The movement of the lifting cylinder 23 will drive the fixed plate 26 to move. The movement of the fixed plate 26 will drive the connecting rod 28 to move. The movement of the connecting rod 28 will drive the conical piston 29 to move. The conical piston 29 will block part of the liquid inlet of the liquid inlet pipe 14, which will reduce the liquid inlet amount of the liquid inlet pipe 14, so that the amount of ammonia water in the buffer cabin 17 is balanced, which is convenient for the atomizing nozzle 19 to continuously and evenly spray ammonia water mist, so as to achieve overload denitrification and improve the denitrification effect of denitrifying the waste gas containing a large amount of nitrogen oxides.

[0036] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A denitrification and dust removal device for a dust removal filter bag, comprising a support plate (1), wherein a support frame (10) is fixedly arranged on the support plate (1), a filter bag (13) is sleeved on the outer side of the support frame (10), and the filter bag (13) is used to filter dust blown from the outside to the inside, characterized in that: A fixing block (11) is fixedly provided at one end of the support frame (10) away from the support plate (1), and the fixing block (11) is connected to an air outlet pipe (12); a buffer chamber (17) is provided above the support plate (1); a liquid inlet pipe (14) is connected below the buffer chamber (17), and the liquid inlet pipe (14) is used to introduce ammonia water into the buffer chamber (17); a connecting pipe (18) is connected above the buffer chamber (17) near the center, and an atomizing nozzle (19) is provided on the connecting pipe (18) for spraying ammonia water mist outward; and an adjusting mechanism (2) is provided above the buffer chamber (17). , and the regulating mechanism (2) is used for ammonia water circulation, the regulating mechanism (2) comprises a regulating chamber (20), and the regulating chamber (20) is provided with a sealing cover (21), the regulating chamber (20) is provided with a lifting assembly inside, and the lifting assembly is used to guide the ammonia water in the regulating chamber (20) into the buffer chamber (17) and simultaneously regulate the flow rate of the ammonia water entering the buffer chamber (17), the regulating chamber (20) is connected with an extension pipe (170) above, the extension pipe (170) is fixedly connected with a buffer cylinder (171) at one end away from the regulating chamber (20), and the buffer cylinder (171) is fixedly connected with the connecting pipe (18).

2. A denitrification and dust removal device for a dust removal filter bag according to claim 1, characterized in that: The lifting assembly comprises a hollow sleeve (22) penetrating the inside of the regulating cabin (20) and the buffer cabin (17), a lifting cylinder (23) being slidably arranged inside the hollow sleeve (22), and a water permeable hole (24) being arranged on the lifting cylinder (23).

3. A denitrification and dust removal device for a dust removal filter bag according to claim 2, characterized in that: A fixing plate (26) is fixedly provided at the lower end of the lifting cylinder (23), and the diameter of the fixing plate (26) is greater than the internal diameter of the hollow sleeve (22); a limiting plate (25) is fixedly provided at one end of the lifting cylinder (23) away from the fixing plate (26), and the diameter of the limiting plate (25) is greater than the internal diameter of the hollow sleeve (22).

4. A denitrification and dust removal device for a dust removal filter bag according to claim 3, characterized in that: A return spring (27) is fixedly arranged below the fixed plate (26), and one end of the return spring (27) away from the fixed plate (26) is fixedly connected to the buffer compartment (17).

5. A denitrification and dust removal device for a dust removal filter bag according to claim 4, characterized in that: A connecting rod (28) is fixedly provided on the fixed plate (26), and a conical piston (29) is fixedly provided on one end of the connecting rod (28) away from the fixed plate (26), and the conical piston (29) is used to adjust the amount of liquid inlet into the liquid inlet pipeline (14).

6. A denitrification and dust removal device for a dust removal filter bag according to claim 1, characterized in that: A connecting ring (172) is fixedly provided on the outside of the connecting pipe (18), a hollow tube (173) is fixedly connected to the connecting ring (172), and one end of the hollow tube (173) away from the connecting ring (172) is inserted deep into the regulating cabin (20) to balance the water level.

7. The denitrification and dust removal device for a dust removal filter bag according to claim 1, characterized in that: A guide rod (1710) is fixedly provided on the inner top surface of the cache barrel (171), and a limit plate (1711) is fixedly provided on one end of the guide rod (1710); a lifting plate (1712) is slidably provided on the guide rod (1710), and the lifting plate (1712) is slidably connected to the inner surface wall of the cache barrel (171); a blocking plate (1713) is fixedly provided below the lifting plate (1712), and the blocking plate (1713) is used to block the extension pipe (170).

8. A denitrification and dust removal device for a dust removal filter bag according to claim 7, characterized in that: A buffer spring (1714) is fixedly arranged above the lifting plate (1712), and one end of the buffer spring (1714) away from the lifting plate (1712) is fixedly connected to the buffer cylinder (171).

9. The denitrification and dust removal device for a dust removal filter bag according to claim 1, characterized in that: A protection column (15) is arranged inside the support frame (10), and a plurality of holes (16) are formed on the protection column (15).

Images