Environment-friendly waste gas treatment equipment

Abstract

The invention belongs to the technical field of metallurgical waste gas treatment, and discloses waste gas treatment environment-friendly equipment which comprises a spray tower shell, a shifting mechanism and a water treater. According to the waste gas treatment device, along with rotation of the rotating frame, activated carbon located above the filler plate can be stirred, so that activated carbon blocks adhered together due to adhesion of calcium hydroxide are dispersed, the situation that pollutants in waste gas cannot be effectively adsorbed due to agglomeration of the activated carbon is prevented, and the situation that the agglomerated activated carbon hinders rising of the waste gas is also prevented; meanwhile, along with rotation of a rotating frame, when a round head is blocked by a filler plate, a first sliding column slides upwards to extrude a first spring, and when the rotating frame continues to rotate to enable the round head to enter a vent groove, the first spring is released, so that the first sliding column is quickly pushed to hit the filler plate; therefore, the spraying solution and the solid salt in the vent groove are shaken off, and the substances are prevented from accumulating in the vent groove to influence the passing efficiency of the waste gas.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgical waste gas treatment, and specifically relates to environmentally friendly waste gas treatment equipment. Background Art

[0002] In the process of iron smelting and steel making, iron ore and coking coal will produce a large amount of harmful substances during the combustion process, such as sulfur dioxide, nitrogen oxides, carbon monoxide, acidic gases, volatile organic compounds, etc. These substances will cause serious damage to the surrounding environment when directly discharged into the air, so it is necessary to separate these substances from the exhaust gas to prevent the exhaust gas from damaging the environment. In the existing exhaust gas treatment process, the exhaust gas is firstly dedusted by dust collectors and other equipment, and then the temperature and humidity of the exhaust gas are adjusted. Subsequently, the sulfur dioxide, hydrogen chloride, etc. in the exhaust gas are absorbed by the spray tower. Finally, according to the needs, oxidants are used to decompose the pollutants contained in the exhaust gas, and the exhaust gas is discharged after it meets the emission standards.

[0003] When removing sulfur dioxide and other substances in waste gas, existing spray towers mostly use alkaline solutions such as calcium hydroxide for spraying. As the alkaline solution reacts with substances such as sulfides, the generated solid salt will adhere to the ventilation grooves opened on the filler plates in the spray tower along with the flow of liquid, resulting in reduced efficiency of air passing through the ventilation grooves. At the same time, the alkaline solution and solid salt will also adhere to the surface of the activated carbon filler, causing the filler to agglomerate, which not only reduces the air passing efficiency, but also reduces the filtering and adsorption effect of the activated carbon, affecting the efficiency of the equipment in treating waste gas. Summary of the invention

[0004] The purpose of the present invention is to provide an environmental protection device for treating waste gas to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an environmental protection device for waste gas treatment, comprising a spray tower shell, an observation window is provided on the outer side of the spray tower shell, a plurality of filling ports are provided on the outer side of the spray tower shell, an air inlet is provided on the outer side of the spray tower shell, an exhaust pipe is fixedly connected to the top of the spray tower shell, and further comprising:

[0006] The toggle mechanism comprises a motor fixedly connected to the base of a spray tower shell, a plurality of filling plates are fixedly connected to the interior of the spray tower shell, an output shaft of the motor is fixedly connected to a transmission shaft that passes through the bottom of the spray tower shell, the transmission shaft passes through the center of the filling plate, a plurality of rotating frames are rotatably installed on the outer surface of the transmission shaft, a gear ring is fixedly sleeved inside the rotating frame, a plurality of second gears are rotatably installed on the top surface of the filling plate, a first gear located inside the rotating frame is fixedly sleeved on the transmission shaft, the second gear is respectively meshed with the first gear and the gear ring, a plurality of centrally symmetrical ventilation grooves are opened on the top surface of the filling plate, a plurality of first slide grooves are opened on the bottom surface of the rotating frame, a second slide groove is opened on the inner top surface of the first slide groove, a first slide column is slidably connected to the first slide groove and the second slide groove, a first spring is elastically connected between the top surface of the first slide column and the top surface of the second slide groove, a round head is fixedly connected to the bottom surface of the first slide column, and the round head is located in the ventilation groove.

[0007] Preferably, the axis of the second slide groove coincides with that of the first slide groove, and the diameter of the second slide groove is smaller than that of the first slide groove, the bottom diameter of the first slide column is larger than the diameter of the ventilation groove, and when the first spring is in an uncontracted state, the bottom surface of the first slide column does not contact the filler plate.

[0008] Preferably, a plurality of spray pipes are fixedly connected to the inside of the spray tower shell, the spray pipes are located above the corresponding filler plates, the transmission shaft passes through the center of the spray pipes, a plurality of nozzles are fixedly connected to the bottom of the spray pipes, and a stirring wheel located inside the spray pipes is fixedly sleeved on the side of the transmission shaft.

[0009] Preferably, a granular filler is placed on the top surface of the filler plate, and the diameter of the granular filler is greater than the width of the ventilation groove.

[0010] Preferably, a scraper is fixedly sleeved on the side of the transmission shaft, the cross-section of the scraper is a right-angled triangle, and one right-angled side of the scraper abuts against the inner bottom surface of the spray tower shell.

[0011] Preferably, a fixing frame is fixedly connected to the inside of the spray tower shell, and the top of the transmission shaft is rotatably mounted at the center of the fixing frame.

[0012] Preferably, it also includes a water treatment device fixedly connected to the outer side of the spray tower shell, the top surface of the water treatment device is fixedly connected to a liquid pump, and the water treatment device is communicated with the spray pipe through a liquid pipe.

[0013] Preferably, a liquid outlet communicating with the inner side is provided on the outer side of the spray tower shell, and the water treatment device is communicated with the spray tower shell through the liquid outlet.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. In the present invention, the motor is set to drive the transmission shaft to rotate, so that the transmission shaft drives the second gear to rotate through the first gear, and the second gear drives the ring gear to rotate. Because the number of teeth of the ring gear is greater than that of the first gear, the rotating frame rotates at a lower speed than the transmission shaft. As the rotating frame rotates, it will poke the activated carbon located above the filler plate, so that the activated carbon clumps that are stuck together due to calcium hydroxide are dispersed, preventing the activated carbon from being unable to effectively adsorb pollutants in the exhaust gas due to agglomeration, and also preventing the agglomerated activated carbon from hindering the rise of the exhaust gas and affecting the treatment of the exhaust gas. At the same time, as the rotating frame rotates, when the round head is blocked by the filler plate, the first slide column will slide upward, thereby squeezing the first spring. When the rotating frame continues to rotate and the round head enters the ventilation groove, the first spring is released, thereby quickly pushing the first slide column to hit the filler plate, thereby shaking off the spray solution and solid salt located in the ventilation groove, preventing these substances from accumulating in the ventilation groove and affecting the passing efficiency of the exhaust gas.

[0016] 2. Secondly, the stirring wheel arranged in the spray pipe rotates with the rotation of the transmission shaft, thereby stirring the spray liquid input by the liquid pipe, so that the calcium hydroxide and water form a uniform suspension, thereby ensuring that the concentration of calcium hydroxide in the spray liquid sprayed from multiple nozzles is the same, thereby ensuring the spray desulfurization effect of the exhaust gas. At the same time, the rotation of the stirring wheel will also generate a certain thrust on the water, thereby reducing the power demand for the liquid pump.

[0017] 3. Finally, by setting a plurality of scrapers at the bottom of the spray tower shell, the scrapers rotate along with the rotation of the transmission shaft, thereby constantly stirring the liquid at the bottom of the spray tower shell, thereby preventing calcium hydroxide from precipitating at the bottom of the spray tower or clogging the connecting pipe between the water treatment unit and the spray tower shell, thereby affecting the treatment efficiency of the water treatment unit for the bottom solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the shell structure of the spray tower of the present invention;

[0020] Figure 3 It is a cross-sectional view of the shell of the spray tower of the present invention;

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 It is a cross-sectional view of the spray pipe of the present invention;

[0023] In the figure: 1. spray tower shell; 11. observation window; 12. air inlet; 13. filling port; 14. liquid outlet; 15. exhaust pipe; 2. toggle mechanism; 21. motor; 22. transmission shaft; 23. filling plate; 24. rotating frame; 25. spray pipe; 26. fixed frame; 27. ventilation groove; 28. gear ring; 29. ​​first gear; 210. second gear; 211. first slide groove; 212. second slide groove; 213. first slide column; 214. first spring; 215. round head; 216. spray head; 217. stirring wheel; 218. scraper; 3. water treatment device; 31. liquid pump; 32. liquid pipe. DETAILED DESCRIPTION

[0024] 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.

[0025] like Figures 1 to 5 As shown, an embodiment of the present invention provides an environmental protection device for treating waste gas, including a spray tower shell 1, an observation window 11 is provided on the outer side of the spray tower shell 1, a plurality of filling ports 13 are provided on the outer side of the spray tower shell 1, an air inlet 12 is provided on the outer side of the spray tower shell 1, an exhaust pipe 15 is fixedly connected to the top of the spray tower shell 1, and further includes:

[0026] The toggle mechanism 2 includes a motor 21 fixedly connected to the base of the spray tower housing 1, a plurality of packing plates 23 are fixedly connected to the inside of the spray tower housing 1, the output shaft of the motor 21 is fixedly connected to a transmission shaft 22 that passes through the bottom of the spray tower housing 1, the transmission shaft 22 passes through the center of the packing plate 23, a plurality of rotating frames 24 are rotatably mounted on the outer surface of the transmission shaft 22, a gear ring 28 is fixedly sleeved inside the rotating frame 24, a plurality of second gears 210 are rotatably mounted on the top surface of the packing plate 23, a first gear 29 located inside the rotating frame 24 is fixedly sleeved on the transmission shaft 22, and the second gear 210 is respectively connected to the first gear 29 and the gear ring 28. The ring 28 is meshed, and the number of teeth of the ring gear 28 is greater than that of the first gear 29, so that the rotating frame 24 rotates at a lower speed than the transmission shaft 22. The top surface of the filler plate 23 is provided with a plurality of centrally symmetrical ventilation grooves 27, and the bottom surface of the rotating frame 24 is provided with a plurality of first slide grooves 211. The inner top surface of the first slide groove 211 is provided with a second slide groove 212. The first slide groove 211 and the second slide groove 212 are slidably connected with a first slide column 213, and a first spring 214 is elastically connected between the top surface of the first slide column 213 and the top surface of the second slide groove 212. The bottom surface of the first slide column 213 is fixedly connected with a round head 215, and the round head 215 is located in the ventilation groove 27.

[0027] In the present invention, the motor 21 is provided to drive the transmission shaft 22 to rotate, so that the transmission shaft 22 drives the second gear 210 to rotate through the first gear 29, and the second gear 210 drives the ring gear 28 to rotate. Since the number of teeth of the ring gear 28 is greater than that of the first gear 29, the rotating frame 24 rotates at a lower speed than the transmission shaft 22. As the rotating frame 24 rotates, it will move the activated carbon located above the filler plate 23, so that the activated carbon clumps that are stuck together due to the presence of calcium hydroxide are dispersed, thereby preventing the activated carbon from being unable to effectively absorb the pollution in the exhaust gas due to agglomeration. At the same time, as the rotating frame 24 rotates, when the round head 215 is blocked by the filling plate 23, the first slide column 213 will slide upward, thereby squeezing the first spring 214. When the rotating frame 24 continues to rotate and the round head 215 enters the ventilation groove 27, the first spring 214 is released, thereby quickly pushing the first slide column 213 to hit the filling plate 23, thereby shaking off the spray solution and solid salt in the ventilation groove 27, preventing these substances from accumulating in the ventilation groove 27 and affecting the passing efficiency of the exhaust gas.

[0028] Secondly, by means of the stirring wheel 217 arranged in the spray pipe 25, as the transmission shaft 22 rotates, the stirring wheel 217 rotates, thereby stirring the spray liquid input by the liquid pipe 32, so that the calcium hydroxide and water form a uniform suspension, thereby ensuring that the concentration of calcium hydroxide in the spray liquid sprayed from multiple nozzles 216 is the same, thereby ensuring the spray desulfurization effect of the exhaust gas. At the same time, the rotation of the stirring wheel 217 will also generate a certain thrust on the water, thereby reducing the power demand for the liquid pump 31.

[0029] Finally, by setting a plurality of scrapers 218 at the bottom of the spray tower shell 1, as the transmission shaft 22 rotates, the scrapers 218 rotate together, thereby continuously stirring the liquid at the bottom of the spray tower shell 1, thereby preventing calcium hydroxide from precipitating at the bottom of the spray tower or clogging the connecting pipe between the water treatment device 3 and the spray tower shell 1, thereby affecting the treatment efficiency of the water treatment device 3 for the bottom solution.

[0030] The axis of the second slide groove 212 coincides with that of the first slide groove 211 , and the diameter of the second slide groove 212 is smaller than that of the first slide groove 211 . The bottom diameter of the first slide column 213 is larger than the diameter of the ventilation groove 27 . When the first spring 214 is in an uncontracted state, the bottom surface of the first slide column 213 does not contact the filler plate 23 .

[0031] The multiple ventilation grooves 27 opened on the filling plate 23 are arranged in a multi-circle state with the center of the filling plate 23 as the center. The number of ventilation grooves 27 in each circle is different, and the distances between different first sliding columns 213 and the center of the transmission shaft 22 are different, and each corresponds to a circle of ventilation grooves 27. In this way, the filling plate 23 can be knocked at different positions, thereby ensuring the effect of shaking off the spray solution and solid salt in the ventilation grooves 27. At the same time, the vibration generated by the knocking of the filling plate 23 will also be transmitted to the activated carbon on the filling plate 23, thereby causing the activated carbon to vibrate and shake off the liquid attached to the activated carbon, thereby increasing the contact area between the activated carbon and the exhaust gas.

[0032] Among them, a plurality of spray pipes 25 are fixedly connected inside the spray tower shell 1, and the spray pipes 25 are located above the corresponding filling plates 23. The transmission shaft 22 passes through the center of the spray pipe 25, and a plurality of nozzles 216 are fixedly connected to the bottom of the spray pipe 25. The side of the transmission shaft 22 is fixedly sleeved with a stirring wheel 217 located inside the spray pipe 25.

[0033] When spraying calcium hydroxide solution, due to the low solubility of calcium hydroxide in water, it is easy to form an uneven suspension. When it is transported into the spray pipe 25 through the liquid pipe 32, if the solution is unevenly mixed, it is easy to cause different concentrations of calcium hydroxide sprayed from multiple nozzles 216. This uneven concentration will cause a part of the exhaust gas sent in to be unable to effectively react with calcium hydroxide, thereby affecting the spray tower's treatment effect on the exhaust gas.

[0034] A granular filler is placed on the top surface of the filler plate 23 , and the diameter of the granular filler is greater than the width of the ventilation groove 27 .

[0035] Granular fillers use activated carbon particles, which have a larger surface area than honeycomb activated carbon and have a better absorption effect on pollutants in exhaust gas. At the same time, the granular activated carbon bed has less impact on gas flow than honeycomb activated carbon, and its cost is also lower.

[0036] A scraper 218 is fixedly sleeved on the side of the transmission shaft 22 . The cross section of the scraper 218 is a right-angled triangle, and one right-angled side of the scraper 218 abuts against the inner bottom surface of the spray tower shell 1 .

[0037] As the spray tower works, part of the calcium hydroxide in the spray liquid fails to react with the sulfide in the exhaust gas, causing it to eventually fall to the bottom of the spray tower shell 1. As the spraying process proceeds, the liquid will accumulate in the spray tower shell 1. As the liquid accumulates, the calcium hydroxide and the solid salt generated after the reaction will precipitate at the bottom of the spray tower shell 1 and eventually agglomerate, which will not only require the use of a high-pressure water gun for subsequent cleaning, but the spray liquid will also cause the spray tower shell 1 to age faster, thereby affecting the actual service life of the spray tower.

[0038] Among them, the inside of the spray tower shell 1 is fixedly connected to a fixing frame 26, the top of the transmission shaft 22 is rotatably installed at the center of the fixing frame 26, and also includes a water treatment device 3 fixedly connected to the outer side of the spray tower shell 1, and the top surface of the water treatment device 3 is fixedly connected to a liquid pump 31. The water treatment device 3 is connected to the spray pipe 25 through a liquid pipe 32. The outer side of the spray tower shell 1 is provided with a liquid outlet 14 connected to the inner side, and the water treatment device 3 is connected to the spray tower shell 1 through the liquid outlet 14.

[0039] The water treatment device 3 filters the liquid extracted from the bottom of the spray tower shell 1, and uses the filtered water to mix with calcium hydroxide again and input it into the spray pipe 25 through the liquid pipe 32.

[0040] Working principle:

[0041] When the present invention is used to treat waste gas generated by iron smelting and steel making, the activated carbon particles are first placed on the filler plate 23, then the motor 21 is turned on and the waste gas is input into the spray tower shell 1 from the air inlet 12, and at the same time the liquid pump 31 is turned on to pump the spray liquid into the spray pipe 25.

[0042] As the exhaust gas enters the spray tower shell 1, the exhaust gas reacts with the calcium hydroxide in the spray liquid to generate solid salt. At this time, the solid salt moves downward with the flow of the liquid and enters the bottom of the spray tower shell 1, so that it is recovered and processed by the water processor 3, and the water inside it is reused.

[0043] During spraying, as the motor 21 rotates, the rotating frame 24 rotates together, thereby moving the activated carbon particles on the filling plate 23, thereby destroying the moisture and solid salts attached to the surface of the activated carbon and other substances that may affect the adsorption effect of the activated carbon. When the rotating frame 24 rotates, the round head 215 at the bottom of the first slide post 213 contacts the filling plate 23 and is pressed into the first slide groove 211, and the first spring 214 contracts to store energy. As the first slide post 213 is driven by the rotating frame 24 to rotate, the round head 215 enters the ventilation groove 27. At this time, the first spring 214 releases its stored energy and rebounds quickly, causing the first slide post 213 to knock the filling plate 23. As the filling plate 23 vibrates due to the knocking and the round head 215 extends quickly, the spray solution and solid salts in the ventilation groove 27 fall down to prevent the ventilation groove 27 from being blocked. At the same time, the vibration of the filling plate 23 will be transmitted to the activated carbon above, so that the moisture and solid salts attached to the activated carbon and other substances that may affect the adsorption effect of the activated carbon are further removed.

[0044] As the spraying proceeds, the water flow carries some of the unreacted calcium hydroxide and solid salt and falls to the bottom of the spray tower shell 1. At this time, under the stirring of the scraper 218 rotating with the drive shaft 22, the calcium hydroxide and solid salt are always suspended in the water below, thereby preventing them from agglomerating after precipitation, resulting in the water treatment device 3 being unable to recycle the water in the spray tower. At the same time, it also prevents the agglomerated materials from rubbing against the drive shaft 22, causing the drive shaft 22 to be damaged prematurely.

[0045] After the exhaust gas is sprayed, it enters the subsequent processing link from the exhaust pipe 15 connected above.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmental protection device for treating waste gas, comprising a spray tower shell (1), wherein an observation window (11) is provided on the outer side of the spray tower shell (1), a plurality of filling ports (13) are provided on the outer side of the spray tower shell (1), an air inlet (12) is provided on the outer side of the spray tower shell (1), and an exhaust pipe (15) is fixedly connected to the top of the spray tower shell (1), characterized in that: Also includes: A toggle mechanism (2), the toggle mechanism (2) comprising a motor (21) fixedly connected to the base of a spray tower shell (1), a plurality of filler plates (23) fixedly connected to the inside of the spray tower shell (1), an output shaft of the motor (21) fixedly connected to a transmission shaft (22) penetrating the bottom of the spray tower shell (1), the transmission shaft (22) penetrating the center of the filler plate (23), a plurality of rotating frames (24) rotatably mounted on the outer surface of the transmission shaft (22), a gear ring (28) fixedly sleeved inside the rotating frame (24), a plurality of second gears (210) rotatably mounted on the top surface of the filler plate (23), and a first gear (29) located inside the rotating frame (24) fixedly sleeved on the transmission shaft (22). The second gear (210) is meshed with the first gear (29) and the gear ring (28) respectively; the top surface of the filler plate (23) is provided with a plurality of centrally symmetrical ventilation grooves (27); the bottom surface of the rotating frame (24) is provided with a plurality of first slide grooves (211); the inner top surface of the first slide groove (211) is provided with a second slide groove (212); a first slide column (213) is slidably connected inside the first slide groove (211) and the second slide groove (212); a first spring (214) is elastically connected between the top surface of the first slide column (213) and the top surface of the second slide groove (212); a round head (215) is fixedly connected to the bottom surface of the first slide column (213); and the round head (215) is located in the ventilation groove (27).

2. The waste gas treatment environmental protection equipment according to claim 1, characterized in that: The axis of the second slide groove (212) coincides with that of the first slide groove (211), and the diameter of the second slide groove (212) is smaller than that of the first slide groove (211). The bottom surface diameter of the first slide column (213) is larger than the diameter of the ventilation groove (27). When the first spring (214) is in an uncontracted state, the bottom surface of the first slide column (213) does not contact the filler plate (23).

3. The waste gas treatment environmental protection equipment according to claim 2 is characterized in that: A plurality of spray pipes (25) are fixedly connected to the inside of the spray tower shell (1); the spray pipes (25) are located above corresponding filler plates (23); the transmission shaft (22) passes through the center of the spray pipe (25); a plurality of spray heads (216) are fixedly connected to the bottom of the spray pipe (25); and a stirring wheel (217) located inside the spray pipe (25) is fixedly sleeved on the side of the transmission shaft (22).

4. The waste gas treatment environmental protection equipment according to claim 3 is characterized by: A granular filler is placed on the top surface of the filler plate (23), and the diameter of the filler is greater than the width of the ventilation groove (27).

5. The waste gas treatment environmental protection equipment according to claim 4 is characterized in that: A scraper (218) is fixedly sleeved on the side of the transmission shaft (22); the cross section of the scraper (218) is a right-angled triangle, and a right-angled side of the scraper (218) abuts against the inner bottom surface of the spray tower shell (1).

6. The waste gas treatment environmental protection equipment according to claim 5, characterized in that: A fixing frame (26) is fixedly connected to the inside of the spray tower shell (1), and the top of the transmission shaft (22) is rotatably mounted on the center of the fixing frame (26).

7. The waste gas treatment environmental protection equipment according to claim 6, characterized in that: It also includes a water treatment device (3) fixedly connected to the outer side of the spray tower shell (1), the top surface of the water treatment device (3) is fixedly connected to a liquid pump (31), and the water treatment device (3) is connected to the spray pipe (25) through a liquid pipe (32).

8. The waste gas treatment environmental protection equipment according to claim 7, characterized in that: The outer side of the spray tower shell (1) is provided with a liquid outlet (14) communicating with the inner side, and the water treatment device (3) is communicated with the spray tower shell (1) through the liquid outlet (14).

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