Energy-saving and environment-friendly tail gas treatment equipment for pelletizer

Abstract

The invention discloses energy-saving and environment-friendly tail gas treatment equipment for a pelletizer, and relates to the technical field of tail gas treatment.The energy-saving and environment-friendly tail gas treatment equipment comprises a tail gas inlet pipe and further comprises a humidifying and cooling device, a powder removing device, a drying assembly, an air exhaust fan and a spraying device, and the spraying device is used for removing harmful gas in gas; the humidifying and cooling device comprises a humidifying tank arranged at the gas outlet end of the tail gas inlet pipe and a first spray head for injecting water mist into the humidifying tank; the powder removing device comprises an impurity removing tank which is arranged on one side of the humidifying tank and communicates with the air outlet end of the humidifying tank. The driving assembly drives the spiral piece to move upwards and rotate, the multiple scraping assemblies are used for scraping attachments on the surface of the spiral piece, the spiral piece is cleaned, and the effect of preventing the attachments from being deposited on the surface of the spiral piece is achieved. And the attachment and the liquid mixed with the impurities are dried by using the dried gas, so that harmful gas is prevented from being released when the drying assembly is cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment, in particular to energy-saving and environment-friendly tail gas treatment equipment for a granulator. Background Art

[0002] Steam is added during the fertilizer granulation process to maintain a certain temperature and humidity of the material so that the material can be easily formed. Exhaust gas is continuously discharged during the granulation stage. The exhaust gas contains harmful gases and dust that are harmful to the environment. If the exhaust gas is not treated and directly discharged into the air, it will seriously pollute the environment.

[0003] A compound fertilizer granulation tail gas washing and utilization device is disclosed in the patent with announcement number CN 207076282 U, including a granulator, a cyclone dust collector, a spray washing box, a tail gas washing tower, a spray pipe, a water reservoir, a recovery tank, a sedimentation tank and a liquid storage tank. The granulation tail gas enters the cyclone dust collector through the pipeline under the action of the induced draft fan, and the dust and tail gas are separated in the cyclone dust collector. The principle of the cyclone dust collector is to use the centrifugal force generated by the cyclone dust collector to separate the dust with a density greater than the airflow from the airflow. The separated dust is freed from the inertia of the airflow and adheres to the inner wall of the cyclone dust collector, and finally falls into the collection device along the inner wall under the action of gravity.

[0004] The device uses a cyclone dust collector to separate dust. Although the dust can be recycled and used as raw materials, the inner wall of the cyclone dust collector has poor anti-adsorption properties. Some compound fertilizers have high solubility (such as urea, etc.). When producing these compound fertilizers, the exhaust gas temperature is high and contains more steam. The dust and steam mixed together will absorb the steam. When the exhaust gas enters the cyclone dust collector, the wet dust that absorbs the steam tends to adhere to the inner wall, forming pieces of "scarred" dirt, making the inner wall bumpy, which will reduce the dust removal efficiency and easily corrode the inner wall. At the same time, the moisture in the dust that falls on the collection device will dissolve some harmful gases. When the dust is processed, the harmful gases in the dust are easily discharged into the external environment. To this end, we propose an energy-saving and environmentally friendly exhaust gas treatment equipment for granulators. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-saving and environmentally friendly tail gas treatment device for a granulator, which can effectively solve the problems raised in the background technology.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is an energy-saving and environmentally friendly tail gas treatment device for a granulator, comprising a tail gas inlet pipe, a humidifying and cooling device, a powder removal device, a drying component, an exhaust fan, and a spray device, wherein the spray device is used to remove harmful gases in the gas;

[0008] The humidification and cooling device comprises a humidification tank arranged at the outlet end of the tail gas inlet pipe, and a first nozzle injecting water mist into the humidification tank;

[0009] The powder removal device comprises a de-impurity tank disposed on one side of the humidifying tank and connected to the air outlet of the humidifying tank, a lifting pipe movably disposed at the middle of the inner side of the de-impurity tank, a spiral blade fixedly disposed on the outer side of the lifting pipe, a partition fixedly disposed on the upper end of the side of the lifting pipe, a plurality of scraping components disposed on the inner wall of the de-impurity tank, and a driving component, wherein the driving component is used to drive the lifting pipe and the spiral blade to move and rotate, and the plurality of scraping components are spirally distributed and used to scrape off impurities attached to the spiral blade;

[0010] A removal pipe for discharging impurities is fixedly arranged at the bottom of the removal tank, one end of the drying component is connected to the removal pipe, and the other end is connected to the air inlet end of the exhaust fan for drying impurities, the removal tank is connected to the air inlet end of the exhaust fan, and the air outlet end of the exhaust fan is connected to the air inlet end of the spraying device.

[0011] Preferably, the humidifying and cooling device also includes a water injection pipe, a first water pipe and a first water pump. The water injection pipe is fixedly arranged at the top of the inner side of the humidifying tank, the first nozzle is fixedly arranged at the bottom of the water injection pipe, one end of the water injection pipe is fixedly arranged at the top of the humidifying tank and is connected to the inside of the water injection pipe, the water outlet end of the first water pump is connected to the other end of the first water pipe, and water is injected into the water injection pipe through the first water pipe.

[0012] Preferably, a temperature and humidity detector is fixedly provided on the inner top of the humidification tank.

[0013] Preferably, a spiral positioning plate is sleeved on the side surface of the lifting tube, and the spiral positioning plate is used to fix the multiple scraping components together.

[0014] Preferably, the scraping assembly comprises a protective plate and a scraper, one end of the protective plate is fixedly connected to the inner wall of the impurity removal tank, and the other end is fixedly connected to the spiral positioning plate, and the scraper is fixedly arranged at the bottom of the protective plate.

[0015] Preferably, a top seat is fixedly provided above the impurity removal tank, and the driving assembly includes a lifting seat arranged above the top seat, a plurality of hydraulic rods fixedly provided on the side of the top seat and used to adjust the height of the lifting seat, a connecting shaft rod movably provided inside the lifting seat, and a driving motor fixedly provided above the lifting seat and used to drive the connecting shaft rod to rotate, and the lower end of the connecting shaft rod is fixedly connected to the inner wall of the lifting tube through a positioning shaft.

[0016] Preferably, the lifting seat includes a bottom plate and a top plate connected to the bottom plate by bolts, a circular groove is provided at the bottom of the top plate, a positioning plate is movably provided inside the circular groove, the top of the connecting shaft passes through the bottom plate and is fixedly connected to the bottom of the positioning plate, and the output end of the driving motor is fixedly connected to the top of the positioning plate.

[0017] Preferably, an air pipe is fixedly connected to one side of the top seat, one end of the air pipe is connected to the inside of the impurity removal tank through the top seat, and the other end of the air pipe is fixedly connected to the air inlet end of the exhaust fan. The drying component includes a drying box connected to the impurity removal pipe through a first valve, a box cover movably arranged on one side above the drying box, an exhaust pipe fixedly arranged on the other side above the drying box, and a one-way throttle valve fixedly arranged on one side of the drying box, the upper end of the exhaust pipe is fixedly connected to the side of the air pipe, and the exhaust pipe is connected to the air pipe, and the side wall of the drying box is provided with an observation window.

[0018] Preferably, the spray device includes a spray tank fixedly connected to the air outlet end of the exhaust fan, a spiral plate fixedly arranged above the interior of the spray tank, and a second nozzle arranged at the bottom of the spiral plate for spraying neutralizing liquid into the spray tank, a water guide chamber is opened inside the spiral plate, a water inlet pipe is fixedly arranged above the spiral plate, a water outlet pipe is fixedly arranged below the spiral plate, the water guide chamber is connected to the water inlet pipe and the water outlet pipe respectively, the second nozzle is fixedly arranged at the bottom end of the water outlet pipe, a second water pump is arranged on one side of the spray tank, and the second water pump is connected to the interior of the water inlet pipe through the guide pipe.

[0019] Preferably, a plurality of temperature conducting shafts are fixedly arranged inside the water conducting chamber, one end of the temperature conducting shaft is fixedly connected to the top wall of the water conducting chamber, and the other end of the temperature conducting shaft is fixedly connected to the bottom wall of the water conducting chamber.

[0020] The present invention has the following beneficial effects:

[0021] 1. In the present invention, the tail gas enters the impurity removal tank after being humidified, flows from top to bottom in the spiral sheet, and is discharged upward through the bottom of the lifting pipe. The high-temperature steam and dust in the tail gas are separated from the gas in the tail gas due to the centrifugal effect and gathered at the inner bottom of the impurity removal tank. After injecting water mist into the tail gas to increase the steam content in the tail gas, the dust in the tail gas absorbs more water, increases the dust weight, and makes the dust separation more complete during centrifugal separation. Injecting water mist to form steam also enables the tail gas to separate more liquid, enhances the dust adsorption capacity, and improves the device's ability to separate dust in the tail gas.

[0022] 2. The present invention uses a first nozzle to inject water mist into the humidification tank, and the water mist forms steam at high temperature. The setting of the humidification tank is conducive to reducing the flow speed of the tail gas, so that the water mist diffuses more evenly in the tail gas after vaporization, so that the steam in the tail gas is more evenly distributed, and the tail gas is evenly cooled, so that the steam in the tail gas is easily liquefied.

[0023] 3. In the present invention, the driving assembly drives the spiral blade to move upward through the lifting tube until each scraping assembly contacts the spiral blade. At this time, the driving assembly drives the spiral blade to move upward again through the lifting tube, and at the same time, the driving assembly drives the spiral blade to rotate through the lifting tube. During the upward movement and rotation of the spiral blade, multiple scraping assemblies scrape off the attachments on the surface of the spiral blade and clean the spiral blade, thereby preventing the attachments from being deposited on the surface of the spiral blade. After cleaning, adjust the spiral blade to return to its original position. The exhaust fan works so that the airflow blows off the attachments from the surface of the spiral blade when passing through the spiral blade. This design also ensures that the scraping assembly will not cause any obstruction when blowing off the attachments. During the up and down movement of the spiral blade, it also scrapes off the attachments on the inner wall of the impurity removal tank.

[0024] 4. In the present invention, during the cleaning stage of the spiral blades, the air is heated and dried in the original pipeline and then enters the impurity removal tank, and the attachments scraped off the surface of the spiral blades are blown to the bottom of the impurity removal tank. The attachments enter the drying component through the impurity removal pipe along with the airflow. The airflow dries the substances inside the drying component, and is used to promptly remove moisture in the impurities and harmful gases dissolved in the water. There is no need to clean the harmful gases again, so that when the impurities are subsequently cleaned, no harmful gases will be released from the impurities.

[0025] 5. In the present invention, the exhaust gas entering the impurity removal tank is dehumidified after passing through the spiral blades. The dried part of the airflow blows the liquid mixed with impurities into the drying component through the impurity removal pipe at the bottom of the impurity removal tank, and the dry hot airflow evaporates the liquid at the same time, thereby improving the evaporation efficiency of the liquid. The steam and harmful gases generated by evaporation enter the exhaust fan, and the harmful gases are removed by subsequent devices, so that the harmful gases dissolved in the liquid can be removed in time without the need to clean the harmful gases again, thereby preventing the release of harmful gases when the drying component is cleaned later. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 A three-dimensional diagram of an energy-saving and environmentally friendly tail gas treatment device for a granulator according to the present invention;

[0028] Figure 2 It is a three-dimensional cross-sectional view of a humidifying and cooling device for an energy-saving and environmentally friendly tail gas treatment device for a granulator of the present invention;

[0029] Figure 3 It is a three-dimensional cross-sectional view of a powder removal device of an energy-saving and environmentally friendly tail gas treatment equipment for a granulator of the present invention;

[0030] Figure 4 It is a three-dimensional cross-sectional view of the partial structure of a powder removal device of an energy-saving and environmentally friendly granulator tail gas treatment device of the present invention;

[0031] Figure 5 It is a three-dimensional diagram of the connection structure of the scraping assembly and the spiral positioning plate of the exhaust gas treatment equipment for the granulator of the present invention;

[0032] Figure 6 It is a three-dimensional cross-sectional view of a spray device of an energy-saving and environmentally friendly tail gas treatment equipment for a granulator of the present invention;

[0033] Figure 7 It is a three-dimensional diagram of the partial structure of a spray device of an energy-saving and environmentally friendly granulator tail gas treatment device of the present invention; Figure 8 A three-dimensional diagram of a scraping assembly of an energy-saving and environmentally friendly tail gas treatment device for a granulator according to the present invention; Fig. 9 A three-dimensional diagram of a drive assembly of an energy-saving and environmentally friendly tail gas treatment device for a granulator according to the present invention; Fig.10 The present invention is a stereoscopic diagram of a lifting seat, a connecting shaft and a connecting structure thereon of an energy-saving and environmentally friendly tail gas treatment device for a granulator.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Exhaust gas intake pipe; 2. Humidification and cooling device; 21. Humidification tank; 22. First nozzle; 23. Water injection pipe; 24. First water pipe; 25. First water pump; 3. Powder removal device; 31. De-impurity tank; 32. Lifting pipe; 33. Spiral sheet; 34. Partition plate; 35. Scraping assembly; 351. Protective plate; 352. Scraper; 36. Driving assembly; 361. Lifting seat; 3611. Bottom plate; 3612. Top plate; 362. Hydraulic rod; 363. Connecting shaft rod; 364. Driving motor; 4. Drying assembly; 41. Drying box; 42. Box cover; 43. Exhaust pipe; 44. One-way throttle valve; 5. Exhaust fan; 6. Spraying device; 61. Spraying tank; 62. Spiral plate; 63. Second nozzle; 64. Water inlet pipe; 65. Water outlet pipe; 66. Second water pump; 7. De-impurity pipe; 8. Temperature and humidity detector; 9. Spiral positioning plate; 10. Top seat; 11. Positioning shaft; 12. Round groove; 13. Positioning plate; 14. Air supply pipe; 15. Observation window; 16. Water guide chamber; 17. Temperature guide shaft; 18. First valve; 19. Guide pipe. DETAILED DESCRIPTION

[0036] 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.

[0037] Example:

[0038] See also Figure 1 - Fig.10 As shown, an energy-saving and environmentally friendly tail gas treatment device for a granulator includes a tail gas inlet pipe 1, a humidifying and cooling device 2, a powder removal device 3, a drying component 4, an exhaust fan 5, and a spray device 6, and the spray device 6 is used to remove harmful gases in the gas;

[0039] The humidifying and cooling device 2 comprises a humidifying tank 21 arranged at the outlet end of the exhaust gas inlet pipe 1, and a first nozzle 22 for injecting water mist into the humidifying tank 21;

[0040] Based on this design, the first nozzle 22 is used to inject water mist into the humidification tank 21, and the water mist forms steam at high temperature. The setting of the humidification tank 21 is conducive to reducing the flow speed of the exhaust gas, so that the water mist diffuses more evenly in the exhaust gas after vaporization, so that the steam in the exhaust gas is more evenly distributed, and the exhaust gas is evenly cooled, so that the steam in the exhaust gas is easily liquefied.

[0041] The powder removal device 3 includes a de-impurity tank 31 arranged on one side of the humidifying tank 21 and connected to the air outlet end of the humidifying tank 21, a lifting pipe 32 movably arranged in the middle of the inner side of the de-impurity tank 31, a spiral blade 33 fixedly arranged on the outer side of the lifting pipe 32, a partition 34 fixedly arranged on the upper end of the side of the lifting pipe 32, a plurality of scraping components 35 arranged on the inner wall of the de-impurity tank 31, and a driving component 36. The driving component 36 is used to drive the lifting pipe 32 and the spiral blade 33 to move and rotate. The plurality of scraping components 35 are distributed in a spiral shape and are used to scrape impurities attached to the spiral blade 33. In the exhaust gas treatment stage, the scraping components 35 and the spiral blade 33 will not contact each other and will not block the dust.

[0042] Based on this design, the impurity removal tank 31, the lifting pipe 32, the spiral blade 33 and the partition 34 form the structure of the steam-water separator. After being humidified, the tail gas enters the impurity removal tank 31, flows from top to bottom in the spiral blade 33, and is discharged upward through the bottom of the lifting pipe 32. During this process, the high-temperature steam and dust in the tail gas are separated from the gas in the tail gas due to the centrifugal effect and converge at the inner bottom of the impurity removal tank 31. After injecting water mist into the tail gas to increase the steam content in the tail gas, the dust in the tail gas absorbs more water, increases the dust weight, and makes the dust separation more complete during centrifugal separation. Injecting water mist to form steam also allows the tail gas to separate more liquid, enhances the dust adsorption capacity, and improves the device's ability to separate dust from the tail gas.

[0043] The injected water mist reduces the overall temperature of the exhaust gas and is also beneficial for the device to convert the steam in the exhaust gas into droplets and separate them.

[0044] After the exhaust gas intake pipe 1 stops conveying harmful exhaust gas, the spiral blade 33 is cleaned and the outside air is conveyed to the exhaust gas intake pipe 1 according to the original pipeline. The driving component 36 drives the spiral blade 33 to move upward through the lifting tube 32 until each scraping component 35 contacts the spiral blade 33. At this time, the driving component 36 drives the spiral blade 33 to move upward again through the lifting tube 32, and at the same time, the driving component 36 drives the spiral blade 33 to rotate through the lifting tube 32. During the upward movement and rotation of the spiral blade 33, multiple scraping components 35 scrape the attachments on the surface of the spiral blade 33 and clean the spiral blade 33, which prevents the attachments from being deposited on the surface of the spiral blade 33 and reduces the corrosion of the attachments on the spiral blade 33. After cleaning, adjust the spiral blade 33 to return to its original position. The exhaust fan 5 works so that the airflow blows off the attachments from the surface of the spiral blade 33 when passing through the spiral blade 33. This design also ensures that the scraping component 35 will not cause any obstruction when blowing off the attachments. Of course, the spiral piece 33 also scrapes away the attachments on the inner wall of the impurity removal tank 31 during the up and down movement.

[0045] A removal pipe 7 for discharging impurities is fixedly provided at the bottom of the removal tank 31. One end of the drying component 4 is connected to the removal pipe 7, and the other end is connected to the air inlet end of the exhaust fan 5 for drying impurities. The removal tank 31 is connected to the air inlet end of the exhaust fan 5, and the air outlet end of the exhaust fan 5 is connected to the air inlet end of the spray device 6.

[0046] Based on the present design, during the cleaning stage of the spiral blade 33, the air is heated and dried in the original pipeline and then enters the impurity removal tank 31, and the attachments scraped off the surface of the spiral blade 33 are blown to the bottom of the impurity removal tank 31. The attachments follow the airflow through the impurity removal pipe 7 and enter the drying component 4. The airflow dries the substances inside the drying component 4, and is used to promptly remove moisture in the impurities and harmful gases dissolved in the water. There is no need to clean the harmful gases again, so that when the impurities are subsequently cleaned, no harmful gases are released from the impurities.

[0047] In the tail gas treatment stage, the tail gas entering the impurity removal tank 31 passes through the spiral blade 33 and the steam is removed, becoming dry. The dried part of the airflow blows the liquid mixed with impurities into the drying component 4 through the impurity removal pipe 7 at the bottom of the impurity removal tank 31, and the dry hot airflow evaporates the liquid at the same time, thereby improving the evaporation efficiency of the liquid. The steam and harmful gases generated by evaporation enter the exhaust fan 5, and the harmful gases are removed by subsequent devices, so that the harmful gases dissolved in the liquid can be removed in time, and there is no need to clean the harmful gases again, so as to prevent the release of harmful gases when the drying component 4 is cleaned later.

[0048] The spray device 6 is used to spray and neutralize the gas entering the spray device 6 to remove harmful gases in the gas.

[0049] Among them, the humidifying and cooling device 2 also includes a water injection pipe 23, a first water pipe 24 and a first water pump 25. The water injection pipe 23 is fixedly arranged at the top of the inner side of the humidifying tank 21, and the first nozzle 22 is fixedly arranged at the bottom of the water injection pipe 23. One end of the water injection pipe 23 is fixedly arranged at the top of the humidifying tank 21 and is connected to the inside of the water injection pipe 23. The water outlet end of the first water pump 25 is connected to the other end of the first water pipe 24, and water is injected into the water injection pipe 23 through the first water pipe 24.

[0050] Based on this design, it is convenient to inject water mist into the humidification tank 21 to humidify the tail gas.

[0051] A temperature and humidity detector 8 is fixedly arranged on the inner top of the humidification tank 21 .

[0052] Based on this design, the temperature and humidity detector 8 is used to detect the room temperature in the humidification tank 21, so as to adjust the amount of water mist injection so that the room temperature in the humidification tank 21 is within a suitable range.

[0053] A spiral positioning plate 9 is sleeved on the side of the lifting tube 32 , and the spiral positioning plate 9 is used to fix the multiple scraping components 35 together.

[0054] Based on the present design, the spiral positioning plate 9 fixes the multiple scraping assemblies 35 together, which facilitates the fixation of the multiple scraping assemblies 35, making the multiple scraping assemblies 35 more stable when in use and less likely to change their positions.

[0055] The scraping assembly 35 includes a protective plate 351 and a scraper 352 . One end of the protective plate 351 is fixedly connected to the inner wall of the impurity removal tank 31 , and the other end is fixedly connected to the spiral positioning plate 9 . The scraper 352 is fixedly arranged at the bottom of the protective plate 351 .

[0056] Based on this design, the protective plate 351 is used to protect, support and fix the scraper 352, so that the scraper 352 is not easily deformed or corroded during use.

[0057] Among them, a top seat 10 is fixedly arranged above the impurity removal tank 31, and the driving assembly 36 includes a lifting seat 361 arranged above the top seat 10, a plurality of hydraulic rods 362 fixedly arranged on the side of the top seat 10 for adjusting the height of the lifting seat 361, a connecting shaft 363 movably arranged inside the lifting seat 361, and a driving motor 364 fixedly arranged above the lifting seat 361 for driving the connecting shaft 363 to rotate, and the lower end of the connecting shaft 363 is fixedly connected to the inner wall of the lifting tube 32 through the positioning shaft 11.

[0058] Based on this design, the top seat 10 and the connecting shaft 363 are sealed by a sealing ring to prevent air leakage and liquid leakage. This design facilitates the adjustment of the connecting shaft 363 to move up and down and rotate, thereby adjusting the position of the lifting tube 32 and the spiral sheet 33.

[0059] Among them, the lifting seat 361 includes a bottom plate 3611 and a top plate 3612 connected to the bottom plate 3611 by bolts. A circular groove 12 is opened at the bottom of the top plate 3612, and a positioning plate 13 is movably arranged inside the circular groove 12. The top of the connecting shaft 363 passes through the bottom plate 3611 and is fixedly connected to the bottom of the positioning plate 13. The output end of the driving motor 364 is fixedly connected to the top of the positioning plate 13.

[0060] Based on this design, the structure of the positioning plate 13 plays a pulling role on the connecting shaft 363, so that the height of the connecting shaft 363 is consistent with the bottom plate 3611 and the top plate 3612. This makes it convenient for the driving motor 364 to drive the connecting shaft 363 to rotate.

[0061] Among them, an air supply pipe 14 is fixedly connected to one side of the top seat 10, one end of the air supply pipe 14 is connected to the inside of the impurity removal tank 31 through the top seat 10, and the other end of the air supply pipe 14 is fixedly connected to the air inlet end of the exhaust fan 5. The drying component 4 includes a drying box 41 connected to the impurity removal pipe 7 through the first valve 18, a box cover 42 movably arranged on one side above the drying box 41, an exhaust pipe 43 fixedly arranged on the other side above the drying box 41, and a one-way throttle valve 44 fixedly arranged on one side of the drying box 41. The upper end of the exhaust pipe 43 is fixedly connected to the side of the air supply pipe 14, and the exhaust pipe 43 is connected to the air supply pipe 14. The side wall of the drying box 41 is provided with an observation window 15. The one-way throttle valve 44 is used to balance the internal air pressure of the drying box 41 to prevent the air pressure in the drying box 41 from being too low.

[0062] Based on this design, in the exhaust gas treatment stage, by adjusting the first valve 18, the high-temperature liquid accumulated in the impurity removal tank 31 slowly enters the interior of the drying box 41, and the outside air enters the interior of the drying box 41 through the one-way throttle valve 44, which is convenient for drying the liquid. The dried water enters the air delivery pipe 14 through the exhaust pipe 43 to prevent excessive accumulation of liquid in the impurity removal tank 31. The observation window 15 is convenient for observing the liquid content entering the drying box 41.

[0063] The spray device 6 includes a spray tank 61 fixedly connected to the air outlet end of the exhaust fan 5, a spiral plate 62 fixedly arranged above the inside of the spray tank 61, and a second nozzle 63 arranged at the bottom of the spiral plate 62 for spraying neutralizing liquid into the spray tank 61. A water guide chamber 16 is provided inside the spiral plate 62, a water inlet pipe 64 is fixedly arranged above the spiral plate 62, and a water outlet pipe 65 is fixedly arranged below the spiral plate 62. The water guide chamber 16 is connected to the water inlet pipe 64 and the water outlet pipe 65 respectively. The second nozzle 63 is fixedly arranged at the bottom end of the water outlet pipe 65. A second water pump 66 is arranged on one side of the spray tank 61, and the second water pump 66 is connected to the inside of the water inlet pipe 64 through the guide pipe 19. A neutralization tank is provided at the water outlet end of the spray tank 61 to further neutralize the liquid discharged from the spray tank 61.

[0064] Based on this design, the second water pump 66 injects the neutralizing liquid with low outside temperature into the water inlet pipe 64 through the flow guide pipe 19, and the neutralizing liquid is sprayed from the second nozzle 63 through the water guide chamber 16 and the water outlet pipe 65, neutralizing the tail gas inside the spray tank 61, removing harmful gases, and the remaining gas flows upward from the bottom of the spiral plate 62 and is discharged from the top pipe of the spray tank 61. The low-temperature neutralizing liquid has a cooling effect on the spiral plate 62, so that the steam in the gas passing through the spiral plate 62 is liquefied and flows down from the bottom of the spiral plate 62, which can reduce the steam content in the gas, so that the harmful gases dissolved in the steam flow to the bottom of the spray tank 61, preventing the harmful gases from dissolving into the steam and being discharged into the outside. Of course, the spiral structure of the spiral plate 62 also promotes the liquefaction of the steam, forming a steam-water separation effect.

[0065] A plurality of temperature conducting shafts 17 are fixedly disposed inside the water conducting chamber 16 , one end of the temperature conducting shaft 17 is fixedly connected to the top wall of the water conducting chamber 16 , and the other end of the temperature conducting shaft 17 is fixedly connected to the bottom wall of the water conducting chamber 16 .

[0066] Based on this design, the temperature conducting shaft 17 absorbs the temperature on the spiral plate 62, so that the cooling effect of the spiral plate 62 is better. The temperature conducting shaft 17 also supports the inside of the spiral plate 62.

[0067] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy-saving and environmentally friendly tail gas treatment device for a granulator, comprising a tail gas inlet pipe (1), characterized in that: It also includes a humidifying and cooling device (2), a powder removal device (3), a drying component (4), an exhaust fan (5), and a spray device (6), wherein the spray device (6) is used to remove harmful gases in the gas; The humidifying and cooling device (2) comprises a humidifying tank (21) arranged at the outlet end of the exhaust gas inlet pipe (1), and a first nozzle (22) for injecting water mist into the humidifying tank (21); The powder removal device (3) comprises a de-impurity tank (31) arranged on one side of the humidifying tank (21) and connected to the air outlet end of the humidifying tank (21), a lifting pipe (32) movably arranged in the middle of the inner side of the de-impurity tank (31), a spiral blade (33) fixedly arranged on the outer side of the lifting pipe (32), a partition plate (34) fixedly arranged on the upper end of the side of the lifting pipe (32), a plurality of scraping components (35) arranged on the inner wall of the de-impurity tank (31), and a driving component (36), wherein the driving component (36) is used to drive the lifting pipe (32) and the spiral blade (33) to move and rotate, and the plurality of scraping components (35) are distributed in a spiral shape and are used to scrape impurities attached to the spiral blade (33); A de-impurity pipe (7) for discharging impurities is fixedly provided at the bottom of the de-impurity tank (31); one end of the drying component (4) is connected to the de-impurity pipe (7), and the other end is connected to the air inlet end of the exhaust fan (5) for drying impurities; the de-impurity tank (31) is connected to the air inlet end of the exhaust fan (5), and the air outlet end of the exhaust fan (5) is connected to the air inlet end of the spray device (6).

2. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 1, characterized in that: The humidifying and cooling device (2) further comprises a water injection pipe (23), a first water pipe (24) and a first water pump (25); the water injection pipe (23) is fixedly arranged at the top of the inner side of the humidifying tank (21); the first nozzle (22) is fixedly arranged at the bottom of the water injection pipe (23); one end of the water injection pipe (23) is fixedly arranged at the top of the humidifying tank (21) and is connected to the inside of the water injection pipe (23); the water outlet end of the first water pump (25) is connected to the other end of the first water pipe (24), and water is injected into the water injection pipe (23) through the first water pipe (24).

3. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 2, characterized in that: A temperature and humidity detector (8) is fixedly arranged on the inner top of the humidifying tank (21).

4. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 3 is characterized in that: A spiral positioning plate (9) is sleeved on the side surface of the lifting tube (32), and the spiral positioning plate (9) is used to fix a plurality of scraping assemblies (35) together.

5. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 4, characterized in that: The scraping assembly (35) comprises a protective plate (351) and a scraper (352); one end of the protective plate (351) is fixedly connected to the inner wall of the impurity removal tank (31), and the other end is fixedly connected to the spiral positioning plate (9); and the scraper (352) is fixedly arranged at the bottom of the protective plate (351).

6. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 5, characterized in that: A top seat (10) is fixedly arranged above the impurity removal tank (31); the driving assembly (36) comprises a lifting seat (361) arranged above the top seat (10), a plurality of hydraulic rods (362) fixedly arranged on the side of the top seat (10) and used to adjust the height of the lifting seat (361), a connecting shaft (363) movably arranged inside the lifting seat (361), and a driving motor (364) fixedly arranged above the lifting seat (361) and used to drive the connecting shaft (363) to rotate, and the lower end of the connecting shaft (363) is fixedly connected to the inner wall of the lifting tube (32) via a positioning shaft (11).

7. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 6, characterized in that: The lifting seat (361) comprises a bottom plate (3611) and a top plate (3612) connected to the bottom plate (3611) by bolts, a circular groove (12) is provided at the bottom of the top plate (3612), a positioning plate (13) is movably provided inside the circular groove (12), the top of the connecting shaft (363) passes through the bottom plate (3611) and is fixedly connected to the bottom of the positioning plate (13), and the output end of the driving motor (364) is fixedly connected to the top of the positioning plate (13).

8. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 7, characterized in that: An air supply pipe (14) is fixedly connected to one side of the top seat (10), one end of the air supply pipe (14) is connected to the interior of the impurity removal tank (31) through the top seat (10), and the other end of the air supply pipe (14) is fixedly connected to the air inlet end of the exhaust fan (5). The drying assembly (4) comprises a drying box (41) connected to the impurity removal pipe (7) through a first valve (18), a box cover (42) movably arranged on one side above the drying box (41), an exhaust pipe (43) fixedly arranged on the other side above the drying box (41), and a one-way throttle valve (44) fixedly arranged on one side of the drying box (41). The upper end of the exhaust pipe (43) is fixedly connected to the side of the air supply pipe (14), and the exhaust pipe (43) is connected to the air supply pipe (14). The side wall of the drying box (41) is provided with an observation window (15).

9. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 8, characterized in that: The spray device (6) comprises a spray tank (61) fixedly connected to the air outlet end of the exhaust fan (5), a spiral plate (62) fixedly arranged at the upper part of the spray tank (61), and a second spray head (63) arranged at the bottom of the spiral plate (62) and used for spraying neutralizing liquid into the spray tank (61); a water guide chamber (16) is provided inside the spiral plate (62); a water inlet pipe (64) is fixedly arranged above the spiral plate (62); a water outlet pipe (65) is fixedly arranged below the spiral plate (62); the water guide chamber (16) is connected to the water inlet pipe (64) and the water outlet pipe (65) respectively; the second spray head (63) is fixedly arranged at the bottom end of the water outlet pipe (65); a second water pump (66) is arranged on one side of the spray tank (61); the second water pump (66) is connected to the inside of the water inlet pipe (64) through the flow guide pipe (19).

10. The energy-saving and environmentally friendly tail gas treatment equipment for a granulator according to claim 9, characterized in that: A plurality of temperature conducting shafts (17) are fixedly arranged inside the water conducting chamber (16), one end of the temperature conducting shaft (17) is fixedly connected to the top wall of the water conducting chamber (16), and the other end of the temperature conducting shaft (17) is fixedly connected to the bottom wall of the water conducting chamber (16).

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