A chemical processing waste gas purification tower

Abstract

The invention belongs to the field of chemical waste gas purification, specifically a chemical processing waste gas purification tower, by arranging a rotating mechanism at the bottom of the tower, using a scraper to scrape off solid particles attached to the inner wall of the purification tower, and fan blades stirring liquid medicine and scattered waste gas to make it fully react; at the same time, by arranging a No. 1 cavity, a No. 2 cavity, a No. 1 through hole, a No. 2 through hole, an air guide plate and a wind shield plate on the scraper and the fan blades, during the rotation process, the air guide plate sucks the waste gas into the No. 1 cavity and the No. 2 cavity, and discharges it from the No. 1 through hole and the No. 2 through hole, so as to achieve repeated purification of the waste gas and improve the purification efficiency; at the same time, by arranging a baffle between the packing layer and the nozzle, the reflux of the waste gas is achieved, so as to achieve a more complete purification effect, and at the same time, the No. 3 through hole and the guide plate are arranged on the baffle to ensure that the sprayed liquid medicine can evenly fall on the filtering device, and the contact area between the liquid medicine and the waste gas can also be increased, so as to achieve the purpose of improving the purification effect.

Description

Technical Field

[0001] The invention belongs to the field of chemical waste gas purification, in particular to a chemical processing waste gas purification tower. Background Art

[0002] Chemical waste gas refers to the toxic and harmful gas discharged by chemical plants during chemical production. Chemical waste gas often contains many types of pollutants, with complex physical and chemical properties and different toxicity, which seriously pollutes the environment and affects human health. At present, chemical waste gas is generally treated by purification towers. Purification towers are equipped with different agents according to different waste gases, and use wet treatment methods to purify a variety of toxic and harmful waste gases. It is designed by absorbing the essence of purification technologies such as foam towers, spray towers, and packing towers, and has dust removal effect.

[0003] There is also a patent in the prior art about a chemical and chemical waste gas purification tower. The application number is 2018218249690, which is a chemical processing waste gas treatment purification tower. Its chemical waste gas enters the metal frame of the purification tower through the air intake pipe. When the waste enters, the circulating pump sprays liquid water through the spray cross pipe. After the spraying, some particulate matter and dust in the waste gas will be washed away. After spraying, the waste gas passes through the primary filter layer, the first activated carbon layer and the second activated carbon layer for filtration, which will filter most of the harmful gases. The first activated carbon layer and the second activated carbon layer are located on the upper and lower sides of the purification filter frame. Such a structure increases the surface area of ​​the first activated carbon layer and the second activated carbon layer, and accelerates the passage rate of the waste gas.

[0004] However, the above-mentioned device has certain technical problems, including the following: when the chemical waste gas purification tower purifies chemical waste gas, because the waste gas contains certain granular objects, the purification tower is not fully intercepted when passing through the purification tower, and the waste gas floats in the purification tower, causing solid waste to adhere to the inner wall of the purification tower and not flow out with the discarded purification liquid, which increases the difficulty of cleaning the side walls of the purification tower and reduces the waste gas purification efficiency in the purification tower; at the same time, when the purification tower is spraying the liquid, because the waste gas will flow with the airflow, when the waste gas rises too fast, the waste gas and the purification liquid are not fully contacted, and the harmful substances in the waste gas are not fully treated, reducing the purification effect of the purification tower.

[0005] In view of this, the present invention solves the above technical problems by proposing a chemical processing waste gas purification tower. Summary of the invention

[0006] In order to make up for the shortcomings of the existing technology, in the chemical processing waste gas purification tower, the existing solid particles are adhered to the inner wall of the purification tower, affecting the purification efficiency, and the waste gas flow rises too fast and the reaction of the liquid medicine is not sufficient.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a chemical processing waste gas purification tower, including a tower body, a water tank, a water pump, a rotating mechanism, and a packing layer; the air inlet pipe is connected to the bottom of the tower body; the water tank is located on the right side of the tower body, and the water tank and the tower body are connected through a No. 1 pipe, and a filter is provided in the No. 1 pipe near the tower body, one end of the No. 1 pipe is connected to the side wall of the tower body near the bottom, and the other end is connected to the water tank near the bottom; the upper end surface of the water tank is connected to the outside world through the water inlet pipe; the right side wall of the water tank is connected to the water pump through the No. 2 pipe, and the upper side of the water pump is connected to one end of the No. 3 pipe, and the other end of the No. 3 pipe penetrates the side wall of the tower body near the top, and the part of the No. 3 pipe extending into the interior of the tower body is evenly provided with nozzles; the bottom of the tower body is connected to a drain pipe at a position opposite to the No. 1 pipe; A rotating mechanism is installed at the bottom inner side of the tower body, and the rotating mechanism includes a rotating shaft, fan blades, and a scraper. The rotating shaft is rotatably connected to the middle part of the bottom of the tower body, and the bottom of the rotating shaft passes through the bottom of the tower body and is connected to a motor installed on the lower surface of the bottom of the tower body. A group of fan blades are evenly arranged on the part of the side wall of the rotating shaft located in the tower body, and the height of the fan blades is higher than the height of the drain pipe. A scraper is arranged at the end of the fan blade away from the rotating shaft, and the side of the scraper facing the rotation direction is a blade portion; a packing layer is arranged above the rotating mechanism, and the packing layer is fixedly connected to the inner wall of the tower body; a baffle is arranged above the packing layer, and the baffle is fixedly connected to the inner wall of the tower body. The baffle is a conical tubular shape with a small end facing downward, and the baffle is located below the nozzle; the tower cover is located at the top of the tower body, and the tower body is connected to the outside world through the exhaust pipe on the top of the tower cover.

[0008] During operation, the prepared liquid medicine enters the water tank through the water inlet pipe, and enters the tower body through the No. 1 pipe at the bottom of the water tank. The liquid level of the injected liquid medicine should be higher than the height of the fan blades. After the liquid medicine is injected, the exhaust gas is introduced from the air inlet pipe, and the exhaust gas contacts and reacts with the liquid medicine at the bottom of the tower, so that the harmful substances in the exhaust gas react with the liquid medicine and are removed. Then the exhaust gas continues to rise and passes through the packing layer, and the dust in the exhaust gas is fully removed, further purifying the exhaust gas; while injecting the exhaust gas, the water pump is started, and the bottom liquid medicine enters the upper part of the tower body through the No. 3 pipe. The filter screen in the No. 1 pipe can prevent the solid particle impurities in the liquid medicine from entering the water tank. The No. 3 pipe extending into the tower body is evenly provided with nozzles. The nozzles are started so that the liquid medicine in the No. 3 pipe is evenly sprayed out under the action of the nozzles and fully contacts with the rising exhaust gas, so that the exhaust gas passing through the packing layer is fully mixed with the mist liquid medicine again and further purified; at the same time, the motor is started to drive the fan blades and scrapers to rotate, and the fan blades repeatedly stir the liquid medicine upward to increase the fluidity of the liquid medicine, and at the same time The waste gas is dispersed, and the large waste gas is turned into small waste gas, which increases the contact area between the waste gas and the liquid medicine, so that the waste gas and the liquid medicine react more fully. At the same time, the scraper scrapes along the inner wall of the tower body, and the solid waste generated after the reaction of the waste gas and the liquid medicine is scraped off from the inner wall. The solid waste generated while cleaning the tower wall falls to the bottom of the tower and is discharged with the waste liquid. The waste gas emerges from the liquid medicine and enters the packing layer above. The packing layer can perform secondary purification and filtration on the waste gas. The waste gas after secondary purification continues to rise, and the waste gas in the middle part passes through the baffle. The plate continues to move upward, and the exhaust gas around it will form a backflow when it encounters the baffle, and enter the packing layer again along the lower surface of the baffle for repeated filtration, and finally pass through the baffle from the center and continue to move upward. The nozzle above the baffle sprays a large amount of liquid medicine, and the exhaust gas reacts with the sprayed liquid medicine. At the same time, part of the exhaust gas is pressed back into the packing layer by the liquid medicine to be purified again, and part of the exhaust gas is discharged from the exhaust pipe above. At the same time, the liquid medicine sprayed by the nozzle flows into the packing layer, which enhances the purification capacity of the packing layer. The liquid medicine flows out of the packing layer and falls into the liquid medicine below, forming a cycle.

[0009] Preferably, an air inlet plate is installed on the side of the upper end surface of the scraper away from the blade portion; a cavity No. 1 opening upward is provided at the portion of the upper end surface of the scraper close to the air inlet plate, and the cavity No. 1 extends downward inside the scraper to near the lower end surface of the scraper, and a through hole No. 1 is evenly arranged between the cavity No. 1 and the blade portion of the scraper.

[0010] During operation, the injected liquid level must be lower than the air entraining plate. The air entraining plate rotates around the rotating axis with the scraper. During rotation, the exhaust gas above is guided by the air entraining plate and enters the No. 1 cavity. There are No. 1 through holes evenly arranged between the No. 1 cavity and the blade of the scraper. The exhaust gas entering the No. 1 cavity is discharged into the medicine liquid through the No. 1 through holes, so that the exhaust gas reacts with the medicine liquid again and the purification is more thorough.

[0011] Preferably, a No. 2 cavity is provided inside the fan blade, one end of the No. 2 cavity is connected to the interior of the No. 1 cavity, and the other end is close to the rotating shaft, and No. 2 through holes are evenly provided in the No. 2 cavity and the upper end surface of the fan blade.

[0012] During operation, the exhaust gas entering the No. 1 cavity enters the No. 2 cavity along the inner wall of the cavity. The No. 2 cavity and the upper end surface of the fan blade are evenly provided with No. 2 through holes. The exhaust gas is discharged into the medicine liquid from the No. 2 through holes. The fan blades stir the medicine liquid to roll. The flow rate of the medicine liquid near the fan blades is faster. The exhaust gas discharged from the No. 2 through holes reacts more thoroughly with the medicine liquid, and the exhaust gas purification is more thorough.

[0013] Preferably, the inner surface of the air guide plate is a curved surface, and a wind shield is provided on the side of the air guide plate close to the rotating shaft.

[0014] During operation, the rotating scraper drives the air entraining plate to rotate around the rotating axis. The air entraining plate is located above the liquid surface. During the rotation, the waste gas above the liquid is sucked in and discharged from the No. 1 through hole and the No. 2 through hole. The inner surface of the air entraining plate is a curved surface, which can better introduce the waste gas into the No. 1 cavity. A wind shield is arranged on one side of the air entraining plate to prevent the introduced waste gas from leaking from the side and affecting the air entrainment efficiency. At the same time, the space formed by the air entraining plate, the wind shield and the end face of the scraper gradually becomes smaller from the air inlet to the No. 1 cavity, which can pressurize and accelerate the inhaled waste gas in the air entraining plate, so that the waste gas can be better inhaled and can better overcome the liquid pressure and be discharged from the No. 1 through hole and the No. 2 through hole.

[0015] Preferably, a group of No. 3 through holes are evenly arranged on the inner surface of the baffle along the cross-sectional direction, and the No. 3 through holes are evenly distributed in an annular shape around the central axis of the baffle.

[0016] During operation, the exhaust gas rising from the packing layer near the inner wall of the tower body will be blocked by the baffle, generating reflux and entering the packing layer again. A small part of the exhaust gas will continue to rise through the No. 3 through hole, and the liquid medicine sprayed by the upper nozzle will react with the exhaust gas and press part of the exhaust gas back to the packing layer. The liquid medicine is sprayed on the baffle and flows into the No. 3 through hole, dripping on the packing layer below, which can make the liquid medicine enter the packing layer more evenly and avoid the situation where there is more liquid medicine in the center of the packing layer and no liquid medicine around it.

[0017] Preferably, a group of guide plates are evenly arranged on the inner surface of the baffle around the central axis of the baffle, and each of the guide plates is located between adjacent No. 3 through holes.

[0018] During operation, each drainage plate is close to the No. 3 through hole above the inclined surface of the baffle. A small part of the liquid medicine sprayed on the baffle will not directly enter the No. 3 through hole, and most of it will be blocked by the drainage plate. The drainage plate and the inner surface of the baffle form an acute angle to prevent the liquid medicine from continuing to slide down the inclined surface. When a certain amount of liquid medicine accumulates, it will flow out from the No. 3 through hole close to the upper side of the inclined surface, which can prevent most of the liquid medicine from flowing to the middle part along the inner surface of the baffle and causing uneven distribution of the liquid medicine in the packing layer. At the same time, accumulation first and then dripping can make the exhaust gas more fully contact with the liquid medicine when passing through the No. 3 through hole, and can also avoid the uneven liquid medicine passing through the No. 3 through hole on the same horizontal plane.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. A chemical processing waste gas purification tower described in the present invention has a rotating mechanism consisting of a rotating shaft, fan blades, a scraper and a motor arranged at the bottom of the tower, and the scraper is used to scrape off solid particles attached to the inner wall of the purification tower, and the fan blades stir the liquid medicine to accelerate the flow rate of the liquid medicine and react more fully with the dispersed waste gas; at the same time, a cavity No. 1, a cavity No. 2, a through hole No. 1, a through hole No. 2, an air guide plate and a wind shield are arranged on the scraper and the fan blades, so that during the rotation process, the air guide plate sucks the waste gas into the cavity No. 1 and the cavity No. 2, and discharges it from the through hole No. 1 and the through hole No. 2, thereby realizing repeated purification of the waste gas and improving the purification efficiency.

[0021] 2. The chemical processing waste gas purification tower described in the present invention realizes the reflux of waste gas by setting a baffle between the packing layer and the nozzle, so that the waste gas stays in the packing layer for a longer time, thereby achieving a more complete purification effect. At the same time, three through holes and a guide plate are set on the baffle to ensure that the sprayed liquid medicine can fall evenly on the filter device, and the contact area between the liquid medicine and the waste gas can also be increased, thereby achieving the purpose of improving the purification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 is a stereogram of the present invention;

[0024] Figure 2 It is the front cross-sectional view of the tower;

[0025] Figure 3 It is a stereogram of the rotating mechanism;

[0026] Figure 4 yes Figure 2 A partial enlarged view of the middle A;

[0027] Figure 5 yes Figure 2 A partial enlarged view of point B in the middle;

[0028] Figure 6is a top view of the baffle;

[0029] In the figure: tower body 1, drain pipe 11, air inlet pipe 12, exhaust pipe 13, tower cover 14, water tank 2, water inlet pipe 21, No. 1 pipe 22, filter 221, No. 2 pipe 23, water pump 3, No. 3 pipe 31, nozzle 311, rotating shaft 41, fan blade 42, No. 2 cavity 421, No. 2 through hole 422, scraper 43, air guide plate 431, No. 1 cavity 432, No. 1 through hole 433, wind shield 434, motor 44, packing layer 5, baffle 6, No. 3 through hole 61, guide plate 62. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 6 As shown, a chemical processing waste gas purification tower is invented, including a tower body 1, a water tank 2, a water pump 3, a rotating mechanism, and a packing layer 5; the air inlet pipe 12 is connected to the bottom of the tower body 1; the water tank 2 is located on the right side of the tower body 1, and the water tank 2 is connected to the tower body 1 through a No. 1 pipe 22. A filter screen 221 is provided in the No. 1 pipe 22 near the tower body 1. One end of the No. 1 pipe 22 is connected to the side wall of the tower body 1 near the bottom, and the other end is connected to the water tank 2 near the bottom; the upper end surface of the water tank 2 is connected to the outside world through the water inlet pipe 21; the right side wall of the water tank 2 is connected to the water pump 3 through the No. 2 pipe 23, and the upper side of the water pump 3 is connected to one end of the No. 3 pipe 31, and the other end of the No. 3 pipe 31 penetrates the side wall of the tower body 1 near the top, and the part of the No. 3 pipe 31 extending into the interior of the tower body 1 is evenly provided with nozzles 311; the bottom of the tower body 1 is connected to the drain pipe 11 at a position opposite to the No. 1 pipe 22; a rotating The rotating mechanism comprises a rotating shaft 41, a fan blade 42, and a scraper 43. The rotating shaft 41 is rotatably connected to the middle part of the bottom of the tower body 1, and the bottom of the rotating shaft 41 passes through the bottom of the tower body 1 and is connected to a motor 44 installed on the lower surface of the bottom of the tower body 1. A group of fan blades 42 are evenly arranged on the part of the side wall of the rotating shaft 41 located inside the tower body 1. The height of the fan blades 42 is higher than the height of the drain pipe 11. The end of the fan blade 42 away from the rotating shaft 41 is provided with a scraper 43, and the side of the scraper 43 facing the rotation direction is a blade portion; a packing layer 5 is provided above the rotating mechanism, and the packing layer 5 is fixedly connected to the inner wall of the tower body 1. A baffle 6 is provided above the packing layer 5, and the baffle 6 is fixedly connected to the inner wall of the tower body 1. The baffle 6 is a conical tubular shape with a small end facing downward, and the baffle 6 is located below the nozzle 311; the tower cover 14 is located at the top of the tower body 1, and the interior of the tower body 1 is connected to the outside through the exhaust pipe 13 at the top of the tower cover 14.

[0032] During operation, the prepared liquid medicine enters the water tank 2 through the water inlet pipe 21, and enters the interior of the tower body 1 through the No. 1 pipe 22 at the bottom of the water tank 2. The liquid level of the injected liquid medicine should be higher than the height of the fan blades 42. After the liquid medicine is injected, the exhaust gas is introduced from the air inlet pipe 12. The exhaust gas contacts and reacts with the liquid medicine at the bottom of the tower, so that the harmful substances in the exhaust gas react with the liquid medicine and are removed. Then the exhaust gas continues to rise and passes through the packing layer 5. The dust in the exhaust gas is fully removed, and the exhaust gas is further purified. While the exhaust gas is injected, the water pump 3 is started to pump the liquid medicine at the bottom through the three The No. 3 pipe 31 enters the upper part of the tower body 1, and the filter screen 221 in the No. 1 pipe 22 can prevent the solid particles in the liquid medicine from entering the water tank 2. The No. 3 pipe 31 extending into the tower body 1 is evenly provided with nozzles 311. The nozzles 311 are started so that the liquid medicine in the No. 3 pipe 31 is evenly sprayed out under the action of the nozzles 311 and fully contacts with the rising exhaust gas, so that the exhaust gas passing through the packing layer 5 is fully mixed with the mist liquid medicine again and further purified; at the same time, the motor 44 is started to drive the fan blades 42 and the scraper 43 to rotate, and the fan blades 42 repeatedly stir the liquid medicine upwards to increase The fluidity of the added liquid medicine is increased, and the waste gas is dispersed at the same time, so that large groups of waste gas become small groups of waste gas, the contact area between the waste gas and the liquid medicine is increased, and the waste gas and the liquid medicine react more fully. At the same time, the scraper 43 scrapes along the inner wall of the tower body 1, and the solid waste generated after the reaction of the waste gas and the liquid medicine is scraped off from the inner wall. The solid waste generated while cleaning the tower wall falls to the bottom of the tower and is discharged with the waste liquid; the waste gas emerges from the liquid medicine and enters the packing layer 5 above. The packing layer 5 can perform secondary purification and filtration on the waste gas. The waste gas after secondary purification continues to rise, and the waste gas in the middle part passes through the baffle. 6 continues to move upward, and the exhaust gas around encounters the baffle 6 to form a backflow, and enters the packing layer 5 again along the lower surface of the baffle 6 for repeated filtration, and finally passes through the baffle 6 from the center and continues to move upward. The nozzle 311 above the baffle 6 sprays a large amount of liquid medicine, and the exhaust gas reacts with the sprayed liquid medicine. At the same time, part of the exhaust gas is pressed back into the packing layer 5 by the liquid medicine to be purified again, and part of the exhaust gas is discharged from the exhaust pipe 13 above. At the same time, the liquid medicine sprayed by the nozzle 311 flows into the packing layer 5, so that the purification capacity of the packing layer 5 is enhanced, and the liquid medicine flows out of the packing layer 5 and falls into the liquid medicine below, forming a cycle.

[0033] In a specific embodiment of the present invention, an air guide plate 431 is installed on the side of the upper end surface of the scraper 43 away from the blade portion; a No. 1 cavity 432 opening upward is provided at a portion of the upper end surface of the scraper 43 close to the air guide plate 431, and the No. 1 cavity 432 extends downward in the scraper 43 to near the lower end surface of the scraper 43, and a No. 1 through hole 433 is evenly arranged between the No. 1 cavity 432 and the blade portion of the scraper 43.

[0034] During operation, the injected liquid level must be lower than the air guide plate 431. The air guide plate 431 rotates with the scraper 43 around the rotating shaft 41. During rotation, the exhaust gas from above enters the No. 1 cavity 432 under the guidance of the air guide plate 431. No. 1 through holes 433 are evenly provided between the No. 1 cavity 432 and the blade of the scraper 43. The exhaust gas entering the No. 1 cavity 432 is discharged into the medicine through the No. 1 through holes 433, so that the exhaust gas reacts with the medicine again and the purification is more thorough.

[0035] In a specific embodiment of the present invention, a second cavity 421 is provided inside the fan blade 42, one end of the second cavity 421 is connected to the inside of the first cavity 432, and the other end is close to the rotating shaft 41, and the second cavity 421 and the upper end surface of the fan blade 42 are evenly provided with a second through hole 422.

[0036] During operation, the exhaust gas entering into the No. 1 cavity 432 enters into the No. 2 cavity 421 along the inner wall of the No. 1 cavity 432. The No. 2 through holes 422 are evenly provided on the No. 2 cavity 421 and the upper end surface of the fan blade 42. The exhaust gas is discharged into the medicine liquid from the No. 2 through holes 422. The fan blade 42 stirs the medicine liquid to roll. The flow rate of the medicine liquid near the fan blade 42 is faster. The exhaust gas discharged from the No. 2 through holes 422 reacts with the medicine liquid more thoroughly, and the exhaust gas is purified more fully.

[0037] In a specific implementation of the present invention, the inner surface of the air guide plate 431 is a curved surface, and a wind shield 434 is provided on the side of the air guide plate 431 close to the rotating shaft 41 .

[0038] During operation, the rotating scraper 43 drives the air guide plate 431 to rotate around the rotating shaft 41. The air guide plate 431 is located above the liquid surface. During the rotation, the waste gas above the liquid is sucked in and discharged from the No. 1 through hole 433 and the No. 2 through hole 422. The inner surface of the air guide plate 431 is a curved surface, which can better introduce the waste gas into the No. 1 cavity 432. A wind shield plate 434 is arranged on one side of the air guide plate 431 to prevent the introduced waste gas from leaking from the side and affecting the air introduction efficiency; at the same time, the space formed by the air guide plate 431, the wind shield plate 434 and the end face of the scraper 43 gradually becomes smaller from the air inlet to the No. 1 cavity 432, which can make the sucked waste gas pressurized and accelerated in the air guide plate 431, so that the waste gas can be better sucked in, and the waste gas can better overcome the liquid pressure and be discharged from the No. 1 through hole 433 and the No. 2 through hole 422.

[0039] In a specific embodiment of the present invention, a group of No. 3 through holes 61 are evenly arranged on the inner surface of the baffle 6 along the cross-sectional direction, and the No. 3 through holes 61 are evenly distributed in an annular shape around the central axis of the baffle 6 .

[0040] During operation, the exhaust gas rising from the packing layer 5 close to the inner wall of the tower body 1 will be blocked by the baffle 6, generating a reflux and entering the packing layer 5 again. A small part of the exhaust gas will continue to rise through the No. 3 through hole 61, and the liquid medicine sprayed by the upper nozzle 311 will react with the exhaust gas and press part of the exhaust gas back to the packing layer 5. The liquid medicine is sprayed on the baffle 6 and flows into the No. 3 through hole 61, and drips onto the packing layer 5 below, which can make the liquid medicine enter the packing layer 5 more evenly and avoid the situation where there is more liquid medicine in the center of the packing layer 5 and no liquid medicine around.

[0041] In a specific embodiment of the present invention, a group of guide plates 62 are evenly arranged on the inner surface of the baffle plate 6 around the central axis of the baffle plate 6 , and each of the guide plates 62 is located between adjacent No. 3 through holes 61 .

[0042] During operation, each guide plate 62 is close to the No. 3 through hole 61 above the inclined surface of the baffle plate 6. A small part of the liquid medicine sprayed on the baffle plate 6 will not directly enter the No. 3 through hole 61, and most of it will be blocked by the guide plate 62. The guide plate 62 and the inner surface of the baffle plate 6 form an acute angle to prevent the liquid medicine from continuing to slide down the inclined surface. When a certain amount of liquid medicine accumulates, it will flow out from the No. 3 through hole 61 close to the upper side of the inclined surface, which can prevent most of the liquid medicine from flowing to the middle part along the inner surface of the baffle plate 6 and causing uneven distribution of the liquid medicine in the packing layer 5. At the same time, accumulation first and then dripping can make the exhaust gas more fully contact with the liquid medicine when passing through the No. 3 through hole 61, and at the same time, it can also avoid the situation where the liquid medicine passes unevenly through the No. 3 through hole 61 on the same horizontal plane.

[0043] The specific workflow is as follows:

[0044] The prepared liquid medicine enters the water tank 2 through the water inlet pipe 21, and enters the tower body 1 through the No. 1 pipe 22 at the bottom of the water tank 2. The liquid medicine level of the injected liquid medicine is higher than the height of the fan blade 42. After the liquid medicine is injected, the exhaust gas is introduced from the air inlet pipe 12, and the exhaust gas contacts and reacts with the liquid medicine at the bottom of the tower, so that the harmful substances in the exhaust gas react with the liquid medicine and are removed. Then the exhaust gas continues to rise and passes through the packing layer 5, and the dust in the exhaust gas is fully removed; while injecting the exhaust gas, the water pump 3 is started, and the bottom liquid medicine enters the upper part of the tower body 1 through the No. 3 pipe 31. The part of the No. 3 pipe 31 extending into the tower body 1 is evenly provided with nozzles 311. The nozzles 311 are started so that the liquid medicine in the No. 3 pipe 31 is evenly sprayed out under the action of the nozzles 311, and contacts with the rising exhaust gas to purify the exhaust gas; at the same time, the motor 44 is started to drive the fan blades 42 and the scraper 43 to rotate, the fan blades 42 repeatedly stir the liquid medicine upward, and the scraper 43 scrapes along the inner wall of the tower body 1. The solid waste generated after the reaction of the waste gas and the liquid medicine is scraped off the inner wall. The solid waste generated while cleaning the tower wall falls to the bottom of the tower and is then discharged with the waste liquid. The waste gas emerges from the liquid medicine and enters the packing layer 5 above. The packing layer 5 includes a filter screen, activated carbon adsorption and other technologies for secondary purification. The waste gas after the secondary purification continues to rise. The waste gas in the middle part continues to rise through the baffle 6. The waste gas around encounters the baffle 6 to form a reflux, and enters the packing layer 5 again along the lower surface of the baffle 6 for repeated filtration, and finally passes through the baffle 6 from the center and continues to rise. The nozzle 311 above the baffle 6 sprays a large amount of liquid medicine, and the waste gas reacts with the sprayed liquid medicine. At the same time, part of the waste gas is pressed back into the packing layer 5 by the liquid medicine to be purified again, and part of the waste gas is discharged from the exhaust pipe 13 above. At the same time, the liquid medicine sprayed by the nozzle 311 flows into the packing layer 5, so that the purification capacity of the packing layer 5 is enhanced, and the liquid medicine flows out of the packing layer 5 and falls into the liquid medicine below to form a cycle.

[0045] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A chemical processing waste gas purification tower, characterized in that: The invention comprises a tower body (1), a water tank (2), a water pump (3), a rotating mechanism and a packing layer (5); an air inlet pipe (12) is connected to the bottom of the tower body (1); the water tank (2) is located on the right side of the tower body (1); the water tank (2) and the tower body (1) are connected via a first pipe (22); a filter screen (221) is provided in the first pipe (22) near the tower body (1); one end of the first pipe (22) is connected to the side wall of the tower body (1) near the bottom, and the other end is connected to the water tank (2) near the bottom; the upper end surface of the water tank (2) is connected via a filter screen (221) The water inlet pipe (21) is in communication with the outside world; the right side wall of the water tank (2) is connected to the water pump (3) through the No. 2 pipe (23); the upper side of the water pump (3) is connected to one end of the No. 3 pipe (31); the other end of the No. 3 pipe (31) penetrates the side wall of the tower body (1) near the top; the portion of the No. 3 pipe (31) extending into the interior of the tower body (1) is evenly provided with nozzles (311); the bottom of the tower body (1) is connected to the drain pipe (11) at a position opposite to the No. 1 pipe (22); a rotating mechanism is installed at the inner bottom of the tower body (1), and the rotating mechanism includes A rotating shaft (41), fan blades (42), a scraper (43) and a motor (44), wherein the rotating shaft (41) is rotatably connected to the middle part of the bottom of the tower body (1), and the bottom of the rotating shaft (41) passes through the bottom of the tower body (1) and is connected to the motor (44) installed on the lower surface of the bottom of the tower body (1), and a group of fan blades (42) are evenly arranged on the side wall of the rotating shaft (41) located inside the tower body (1), the height of the fan blades (42) is higher than the height of the drainage pipe (11), and the end of the fan blade (42) away from the rotating shaft (41) is provided with a scraper A plate (43) is provided, wherein the side of the scraper (43) facing the rotation direction is a blade portion; a packing layer (5) is provided above the rotating mechanism, the packing layer (5) is fixedly connected to the inner wall of the tower body (1); a baffle (6) is provided above the packing layer (5), the baffle (6) is fixedly connected to the inner wall of the tower body (1), the baffle (6) is conical with a small end facing downward, and the baffle (6) is located below the nozzle (311); a tower cover (14) is located at the top of the tower body (1), and the interior of the tower body (1) is connected to the outside through an exhaust pipe (13) at the top of the tower cover (14).

2. A chemical processing waste gas purification tower according to claim 1, characterized in that: An air guide plate (431) is installed on the side of the upper end surface of the scraper (43) away from the blade portion; a cavity (432) with an upward opening is provided at a portion of the upper end surface of the scraper (43) close to the air guide plate (431); the cavity (432) extends downward inside the scraper (43) to a position close to the lower end surface of the scraper (43); and through holes (433) are evenly arranged between the cavity (432) and the blade portion of the scraper (43).

3. A chemical processing waste gas purification tower according to claim 2, characterized in that: A second cavity (421) is provided inside the fan blade (42), one end of the second cavity (421) is connected to the inside of the first cavity (432), and the other end is close to the rotating shaft (41), and second through holes (422) are evenly provided on the second cavity (421) and the upper end surface of the fan blade (42).

4. A chemical processing waste gas purification tower according to claim 3, characterized in that: The inner surface of the air guide plate (431) is a curved surface, and a wind shield (434) is provided on the side of the air guide plate (431) close to the rotating shaft (41).

5. A chemical processing waste gas purification tower according to claim 4, characterized in that: A group of number three through holes (61) are evenly arranged on the inner surface of the baffle plate (6) along the cross-sectional direction, and the number three through holes (61) are evenly distributed in an annular shape around the central axis of the baffle plate (6).

6. A chemical processing waste gas purification tower according to claim 5, characterized in that: A group of guide plates (62) are evenly arranged on the inner surface of the baffle plate (6) around the central axis of the baffle plate (6), and each of the guide plates (62) is located between adjacent No. 3 through holes (61).

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