Tail gas recovery treatment equipment, tail gas recovery treatment method and application of tail gas recovery treatment equipment in methylamine preparation

Abstract

The invention relates to the technical field of tail gas treatment equipment, and discloses tail gas recovery treatment equipment, a treatment method and application in methylamine preparation.The tail gas recovery treatment equipment comprises a first storage area and a second storage area, the second storage area is arranged in the first storage area, and a treatment area is arranged in the second storage area; a spraying assembly and a sputtering assembly which are used for rotating are arranged in the treatment area, a concentration sensor is arranged on the right side wall of the treatment area, and the spraying assembly comprises a first water storage device; through mutual cooperation of a vibration assembly and an extrusion block, a water spraying assembly can intermittently spray water, a water baffle is made to vibrate, water stains attached to the surface of the water baffle are vibrated and separated, and the situation that a water solution is saturated and cannot absorb methylamine is avoided; the tail gas in the treatment area is rotated, and the tail gas can be in full contact with a sprayed water solution in cooperation with the water solution.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment equipment, and in particular to tail gas recovery and treatment equipment, a treatment method and application in methylamine preparation. Background Art

[0002] In the chemical production process, especially in the preparation of methylamine, tail gas containing harmful substances such as ammonia and methylamine will be produced. If the tail gas is not effectively treated and discharged directly, it will cause serious pollution to the environment. At present, the tail gas treatment technology mainly adopts physical absorption, chemical absorption, adsorption and catalysis, and is usually treated with tail gas recovery and treatment equipment.

[0003] A Chinese patent with publication number CN105457443A discloses a tail gas absorption tower and a treatment device for tail gas from molecular sieve roasting. The present invention discloses a tail gas absorption tower, which includes a shell and an upper tower plate, a packing layer and a bottom tower plate arranged in the shell, and the internal space of the shell is divided from top to bottom into a washing liquid spraying area located above the upper tower plate, an adsorption area defined by the upper tower plate and the bottom tower plate, and an air flow inlet area located below the bottom tower plate through the upper tower plate and the bottom tower plate. It is characterized in that the bottom tower plate is composed of an air flow guide plate layer and a blocking grid mesh located on the upper part of the air flow guide plate layer, and the guide plates in the air flow guide plate layer are inclined. When the device is in use, it can only increase the mixing intensity of most gases and materials through a simple rotating airflow method, but the exhaust gas located in the edge area cannot be treated.

[0004] A Chinese patent with publication number CN102895863A discloses an absorption device for tail gas from cyanuric acid production and an absorption method thereof. The absorption device for tail gas from cyanuric acid production comprises a urea polycondensation furnace for preparing crude cyanuric acid from urea, the urea polycondensation furnace is connected to a saturated absorption tower of an ammonium sulfate production device, a gas collecting chamber is installed at the furnace door of the urea polycondensation furnace to prevent the ammonia-containing tail gas from overflowing when the furnace door is opened and closed, the gas collecting chamber is connected to a first and second absorption tower, the second absorption tower is connected to a saturated absorption tower, although the device can treat the waste gas, it cannot be adjusted accordingly according to the concentration of the waste gas, and cannot be targeted for treatment.

[0005] Moreover, in the above-mentioned prior art, the tail gas recovery and treatment equipment is mostly treated by spraying when in use. However, due to the different concentrations of the tail gas, when the tail gas concentration is low, too much aqueous solution causes waste, and when the tail gas concentration is high, the aqueous solution is too saturated and cannot be treated. Summary of the invention

[0006] The object of the present invention is to provide a tail gas recovery and treatment device, a treatment method and application in the preparation of methylamine, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an exhaust gas recovery and treatment device, comprising a first storage area and a second storage area, wherein the second storage area is arranged inside the first storage area, a treatment area is arranged inside the second storage area, a spray assembly and a sputtering assembly for rotation are arranged inside the treatment area, and a concentration sensor is arranged on the right side wall of the treatment area; The spray assembly includes a first water reservoir, the inner bottom wall of the first water reservoir is inverted convex, the bottom surface of the first water reservoir is provided with a plurality of stirring plates and atomizing nozzles, the surface of the stirring plate is provided with a groove, a plurality of water spray assemblies are rotatably connected to the edge of the bottom surface of the first water reservoir, a plurality of vibration assemblies for connecting the water spray assemblies are provided inside the first water reservoir, and each vibration assembly is connected to the upper end of the water spray assembly.

[0008] The sputtering assembly comprises a water baffle plate, the cross section of the water baffle plate is crescent-shaped, and the water baffle plate is made of rubber.

[0009] Preferably, a plurality of extrusion blocks are provided on the upper part of the inner wall of the processing area, and the ends of each of the extrusion blocks close to each other are arc-shaped, and each of the extrusion blocks and the vibration assembly are in the same horizontal plane. The bottom surface of the processing area is connected to a drainage hopper, and a filter net is provided inside the drainage hopper.

[0010] Preferably, the water spray assembly includes a water spray pipe, a water spray nozzle is provided at the lower end of the water spray pipe, and the cross-section of the water spray nozzle is an isosceles trapezoidal shape, a positioning plate is provided on the outer surface of the water spray pipe, a torsion spring is provided on the upper surface of the positioning plate, and the other end of the torsion spring is fixedly connected to the bottom surface of the first water reservoir.

[0011] Preferably, the vibration assembly includes a second water reservoir, a moving plate is slidably connected to the interior of the second water reservoir, an extrusion plate is provided in the middle of one side of the moving plate, a plurality of impact columns are provided at the edge of one side of the moving plate, a spring is provided on the other side of the moving plate, and the other end of the spring is fixedly connected to the second water reservoir.

[0012] Preferably, the upper surface of the second storage area is rotatably connected to a rotating shaft, the lower end of the rotating shaft is connected to the first water reservoir, a water tank is provided on the upper surface of the first storage area, a first water pump is provided inside the water tank, and the output end of the first water pump passes through the water tank and extends to the inside of the rotating shaft.

[0013] Preferably, an air inlet pipe is provided on one side of the first storage area, the other end of the air inlet pipe passes through the second storage area and is connected to the treatment area, an activated carbon adsorption layer is provided inside the air inlet pipe, an air outlet pipe is provided on the other side of the first storage area, the other end of the air outlet pipe passes through the second storage area and is connected to the treatment area, two symmetrical second water pumps are provided inside the first storage area, each of the output ends of the second water pumps is connected to a conduit, the other end of the conduit is connected to the water tank.

[0014] The present invention also provides a treatment method for tail gas recovery and treatment equipment, and the specific operation method steps are as follows: S1, first fill water into the water tank, start the first water pump to fill water into the first water reservoir, and spray the aqueous solution through the atomizing nozzle; S2, secondly, the tail gas is introduced into the treatment area through the air inlet pipe, and the methylamine is dissolved in water under the action of spraying, so as to achieve the purpose of treating the tail gas, and then the aqueous solution is collected and recovered through the drainage bucket below; S3, then the concentration sensor is used to detect the methylamine concentration inside the treatment area. When the threshold value is reached, the power of the first water pump is increased. Under the action of the water pressure, the vibration component is turned on, and the aqueous solution can be sprayed out through the water spray component. The sprayed aqueous solution hits the sputtering component to generate thrust on the first water reservoir to make it rotate, thereby driving the stirring plate below to rotate; S4. Finally, when the concentration is lower than the threshold, the power of the first water pump is gradually reduced to stop the rotation of the first water reservoir, and the treated exhaust gas is discharged from the exhaust pipe under the push of the newly entered exhaust gas.

[0015] The present invention also provides an application of tail gas recovery and treatment equipment in the preparation of methylamine.

[0016] Technical effects of the present invention: 1. The present invention uses the first water reservoir and two groups of atomizing nozzles to change the water spraying amount of the atomizing nozzle according to the amount of the aqueous solution in the first water reservoir, thereby adjusting the water spraying amount according to the concentration of the exhaust gas to avoid inadequate treatment.

[0017] 2. The present invention is provided with a water spray component and a sputtering component, so that the first water reservoir can drive the stirring plate to rotate, so that the exhaust gas inside the treatment area can rotate, and the sprayed aqueous solution can make the exhaust gas fully contact with the aqueous solution, so that the efficiency of exhaust gas treatment is increased, and water splashes can be generated under the sputtering component. The water splashes combined with the sprayed aqueous solution can further improve the treatment efficiency.

[0018] 3. The present invention is provided with a vibration component, which can generate water bubbles through vibration and release the water bubbles through a water spraying component. The contact area between the water bubbles and the tail gas is increased, so that methylamine can be absorbed more quickly. Through the mutual cooperation of the vibration component and the extrusion block, the water spraying component can perform intermittent water spraying, causing the water baffle to vibrate and vibrating off the water stains attached to the surface of the water baffle, avoiding the saturation of the aqueous solution and being unable to absorb methylamine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the front cross-sectional structure of the first storage area of the present invention; Figure 3 is a schematic diagram of the right cross-sectional structure of the first storage area of the present invention; Figure 4 is a schematic diagram of the top cross-sectional structure of the first storage area of the present invention; Figure 5 is a schematic diagram of the structure of the first water storage device of the present invention; Figure 6 is a cross-sectional structure schematic diagram of the first water storage device of the present invention; Figure 7 is a schematic diagram of the structure of the water spraying device of the present invention; Figure 8 is a schematic diagram of the structure of the second water storage device of the present invention; Fig. 9 is a cross-sectional structure schematic diagram of the second water storage device of the present invention.

[0020] In the figure: 1. First storage area; 2. Second storage area; 3. Treatment area; 4. Spraying component; 401. First water storage device; 402. Stirring plate; 403. Atomizing nozzle; 5. Sputtering component; 501. Water baffle; 6. Water spraying component; 601. Water spraying pipe; 602. Water spraying nozzle; 603. Positioning plate; 7. Vibration component; 701. Second water storage device; 702. Moving plate; 703. Extrusion plate; 704. Impact column; 8. Extrusion block; 9. Drain hopper; 10. Filter screen; 11. Rotating shaft; 12. Water tank; 13. First water pump; 14. Intake pipe; 15. Exhaust pipe; 16. Second water pump; 17. Pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] First Embodiment like Figures 1 to 9 The tail gas recovery and treatment equipment shown in the figure includes a first storage area 1 and a second storage area 2. The first storage area 1 is used to store an aqueous solution for absorbing methylamine. The second storage area 2 can effectively create a gap between the treatment area 3 and the first storage area 1, and can effectively accommodate the overflowed methylamine to avoid leakage of methylamine. The second storage area 2 is arranged inside the first storage area 1. A pressure valve is arranged at the lower part of the outer surface of the second storage area 2. When the tail gas collected inside the second storage area 2 gradually increases, the pressure valve can be opened to allow part of the tail gas to enter the first storage area 1, so that the tail gas contacts the aqueous solution, thereby being able to The tail gas is treated, and a treatment area 3 is provided inside the second storage area 2. The treatment area 3 can spray the incoming tail gas. The tail gas is treated by methylamine being easily soluble in water. A spray component 4 and a sputtering component 5 for rotation are provided inside the treatment area 3. A concentration sensor is provided on the right side wall of the treatment area 3. The concentration sensor can detect the methylamine concentration inside the treatment area 3 in real time, and adjust the amount of the sprayed aqueous solution according to the concentration. The higher the concentration, the more the amount of the aqueous solution sprayed, to avoid excessive concentration, in which the aqueous solution cannot completely absorb the methylamine. The lower the concentration, the less the amount of the aqueous solution sprayed, thereby reducing the use of water resources.

[0023] The spray assembly 4 includes a first water reservoir 401, the inner bottom wall of the first water reservoir 401 is inverted convex, and the bottom surface of the first water reservoir 401 adopts a double horizontal plane setting, namely a first horizontal plane and a second horizontal plane. When the water resources inside the first water reservoir 401 are small, the water resources in the first water reservoir 401 are lower than the second horizontal plane, and water can be sprayed through a group of atomizing nozzles 403 below. When the water resources inside the first water reservoir 401 gradually increase until they exceed the second horizontal plane, the water resources can be sprayed through another group of atomizing nozzles 403, so that the amount of water sprayed gradually increases, thereby avoiding the situation where the water resources fail to absorb methylamine.

[0024] The bottom surface of the first water reservoir 401 is provided with a plurality of stirring plates 402 and atomizing nozzles 403, wherein one group of atomizing nozzles 403 is connected to the first horizontal surface of the first water reservoir 401, and another group of atomizing nozzles 403 is connected to the second horizontal surface of the first water reservoir 401, so that the spraying amount can be adjusted according to the amount of water injected, and the more water is injected into the first water reservoir 401, the more water is sprayed by the two groups of atomizing nozzles 403, thereby achieving the purpose of adjusting the amount of water sprayed, and the surface of the stirring plate 402 is provided with a groove, and the groove can make the stirring plate 402 move more gas, thereby driving the gas to Rotation, a plurality of water spray assemblies 6 are rotatably connected to the edge of the bottom surface of the first water reservoir 401, the water spray assemblies 6 can further increase the amount of water sprayed, and at the same time, the sprayed water column hits the splashing assembly 5 to generate mutual force, pushing the water spray assembly 6 to drive the first water reservoir 401 to rotate, and the interior of the first water reservoir 401 is provided with a plurality of vibration assemblies 7 for connecting the water spray assemblies 6, and each vibration assembly 7 is connected to the upper end of the water spray assembly 6, and the vibration assembly 7 can generate some bubbles when vibrating, and these bubbles can also absorb methylamine after being sprayed out, thereby further improving the efficiency of exhaust gas treatment.

[0025] The sputtering assembly 5 includes a water baffle 501, which can break up the water column that impacts the surface to generate water splashes. The water splashes cooperate with the sprayed aqueous solution to further improve the exhaust gas treatment efficiency. The cross-section of the water baffle 501 is crescent-shaped, which can change the movement direction of the aqueous solution that impacts the surface of the water baffle 501 and rotate the water to prevent part of the methylamine from being adsorbed on the surface of the water baffle 501 during treatment. The water baffle 501 is made of rubber and can be deformed when impacted. When the force disappears, it gradually recovers, thereby generating a certain vibration to vibrate and detach the water stains attached to the surface of the water baffle 501, thereby replacing the new aqueous solution to prevent the aqueous solution from being saturated and unable to absorb methylamine.

[0026] A plurality of extrusion blocks 8 are provided on the upper part of the inner wall of the treatment area 3. The ends of each extrusion block 8 that are close to each other are in an arc shape, which can avoid jamming when contacting the extrusion plate 703. Each extrusion block 8 and the vibration component 7 are in the same horizontal plane, so that the vibration component 7 can rotate with the first water reservoir 401 and contact the extrusion block 8 to avoid misalignment. The bottom surface of the treatment area 3 is connected to a drainage hopper 9, which can collect the aqueous solution of adsorbed methylamine. A filter screen 10 is provided inside the drainage hopper 9, which can effectively clean some impurities that are insoluble in water.

[0027] The water spray assembly 6 includes a water spray pipe 601, which is in the shape of an inverted 7 and can change the direction of the sprayed water column so that the water column can impact the water retaining plate 501 within a certain period of time. A water spray nozzle 602 is provided at the lower end of the water spray pipe 601, and the cross-section of the water spray nozzle 602 is in the shape of an isosceles trapezoid, which can compress the sprayed aqueous solution and increase the impact force caused by the aqueous solution. A positioning plate 603 is provided on the outer surface of the water spray pipe 601, and a torsion spring is provided on the upper surface of the positioning plate 603, and the other end of the torsion spring is fixedly connected to the bottom surface of the first water reservoir 401. The permanent position of the water spray pipe 601 is inclined to avoid the situation where the water spray pipe 601 does not spray in place when spraying water. At the same time, under the action of the torsion spring, it can play a positioning role. When subjected to external force, the water spray pipe 601 can change direction, so that it can spray water in multiple directions, so that the coverage area of ​​the water spray is larger, and the situation of not spraying in place is avoided.

[0028] The vibration assembly 7 includes a second water reservoir 701, and a moving plate 702 is slidably connected inside the second water reservoir 701. An extrusion plate 703 is provided in the middle of one side of the moving plate 702, and a plurality of impact columns 704 are provided at the edge of one side of the moving plate 702. A spring is provided on the other side of the moving plate 702, and the other end of the spring is fixedly connected to the second water reservoir 701.

[0029] During use, the aqueous solution inside the second water reservoir 701 gradually increases. Under the action of water pressure, the moving plate 702 drives the squeezing plate 703 to move outward. When the rotating squeezing plate 703 hits the squeezing block 8, under the action of squeezing, the squeezing plate 703 drives the moving plate 702 to shrink inward, so that the spring compression produces a restoring elastic force. When passing over the squeezing block 8, the squeezing force disappears, and the elastic potential energy is released, so that the moving plate 702 drives the impact column 704 to quickly hit the inner wall of the second water reservoir 701, causing the second water reservoir 701 to vibrate. Under the action of vibration, some bubbles can be generated. After these bubbles are sprayed out, they can also absorb methylamine, thereby further improving the efficiency of exhaust gas treatment.

[0030] The upper surface of the second storage area 2 is rotatably connected with a rotating shaft 11, and the lower end of the rotating shaft 11 is connected to the first water reservoir 401. A water tank 12 is provided on the upper surface of the first storage area 1, and a first water pump 13 is provided inside the water tank 12. The output end of the first water pump 13 passes through the water tank 12 and extends to the inside of the rotating shaft 11. The aqueous solution inside the water tank 12 can be introduced into the first water reservoir 401 through the first water pump 13, thereby achieving the purpose of aqueous solution transmission. The power of the first water pump 13 can be freely adjusted. When the power gradually increases, the water intake is increased to avoid the situation where there is insufficient aqueous solution.

[0031] An air inlet pipe 14 is provided on one side of the first storage area 1, and the other end of the air inlet pipe 14 passes through the second storage area 2 and is connected with the treatment area 3, so that the exhaust gas can enter the treatment area 3 through the air inlet pipe 14, and is discharged through the air outlet pipe 15 after the treatment is completed. An activated carbon adsorption layer is provided inside the air inlet pipe 14, and the activated carbon can perform preliminary treatment on the exhaust gas. An air outlet pipe 15 is provided on the other side of the first storage area 1, and a stop valve is provided inside the air outlet pipe 15. The other end of the air outlet pipe 15 passes through the second storage area 2 and is connected with the treatment area 3. Two symmetrical second water pumps 16 are provided inside the first storage area 1, and the output end of each second water pump 16 is connected to a conduit 17, and the other end of the conduit 17 is connected to the water tank 12. Under the action of the second water pump 16, the collected aqueous solution can be transmitted to the inside of the water tank 12 through the conduit 17, thereby achieving the purpose of water circulation and reducing waste (due to the use of spraying to treat methylamine, excessive aqueous solution cannot be saturated, and the solution is collected and diluted for recycling again).

[0032] When in use, firstly, water is injected into the water tank 12 to fill the water tank 12 with the aqueous solution to avoid insufficient aqueous solution after starting, and then the first water pump 13 is started to inject water into the first water reservoir 401 (at this time, the water intake is small, and the atomizing nozzle 403 in the middle can keep up with the water injection amount), so that the aqueous solution is sprayed out through the atomizing nozzle 403 in the middle, and the exhaust gas is transported to the inside of the air inlet pipe 14. Under the transmission of the air inlet pipe 14, the exhaust gas enters the treatment area 3. Under the action of the sprayed aqueous solution, the exhaust gas in the treatment area 3 can be effectively treated, methylamine can be absorbed, and the methylamine concentration in the exhaust gas can be reduced. When the treatment is completed, it is discharged through the exhaust pipe 15.

[0033] When the concentration sensor monitors that the methylamine concentration inside the treatment area 3 reaches the first threshold value, the stop valve is closed, the power of the first water pump 13 is increased, the water intake is gradually increased, and the level of the aqueous solution entering the first water reservoir 401 gradually rises until it passes over the second level of the first water reservoir 401. The aqueous solution that passes over can be sprayed out through another group of atomizing nozzles 403. The water spraying amount is increased by increasing the number of atomizing nozzles 403, and the atomizing nozzles 403 located on the second level are located outside the first water reservoir 401. Therefore, when the aqueous solution is sprayed, the coverage area is wider, avoiding the situation of insufficient coverage (due to the increase in methylamine concentration, it cannot be discharged through the exhaust pipe 15 in time, and the exhaust gas gradually spreads and fills the treatment area 3).

[0034] When the concentration sensor monitors that the methylamine concentration inside the treatment area 3 reaches the second threshold value, the power of the first water pump 13 is increased again, and the water intake is increased again until the internal space of the first water reservoir 401 is filled, and part of the aqueous solution can enter each second water reservoir 701. Under the action of water pressure, the moving plate 702 is pushed to drive the extrusion plate 703 to move outward, so that the shielding moving plate 702 gradually passes over the upper end of the water spray pipe 601, so that the second water reservoir 701 and the water spray pipe 601 are connected, so that the aqueous solution can be sprayed out from the water nozzle 602 through the water spray pipe 601, and the generated water column directly hits the water retaining plate 501.

[0035] When the water column hits and breaks the water retaining plate 501, a certain mutual force can be generated, which pushes the water spray assembly 6 to drive the first water reservoir 401 to rotate. At the same time, part of the water column that hits the water retaining plate 501 is broken to generate water splashes. The water splashes are combined with the sprayed aqueous solution to further improve the exhaust gas treatment efficiency. Under the impact of the water column, the first water reservoir 401 rotates, driving the multiple stirring plates 402 to perform circular motion. Under the action of the stirring plates 402, the exhaust gas inside the treatment area 3 is driven to rotate. The rotating exhaust gas is combined with the sprayed aqueous solution to enable the exhaust gas to fully contact the aqueous solution, thereby avoiding the situation where the aqueous solution absorbs methylamine incompletely.

[0036] When the first water reservoir 401 gradually rotates, it drives the vibration component 7 to perform circular motion, so that the extrusion plate 703 contacts the extrusion block 8. Under the extrusion of the extrusion block 8, the extrusion plate 703 drives the moving plate 702 and the impact column 704 to shrink inward, so that the spring is compressed to generate a restoring elastic force, and the moving plate 703 is reset at the same time, and the upper end of the water spray pipe 601 is closed again to prevent the aqueous solution from spraying out from here, thereby reducing waste. Since intermittent water spraying is adopted, water resources can be saved to a great extent.

[0037] When the extrusion plate 703 passes over the extrusion block 8, the extrusion force disappears and the elastic potential energy is released, so that the moving plate 702 drives the impact column 704 to quickly impact the inner wall of the second water reservoir 701, causing the second water reservoir 701 to vibrate. Under the action of vibration, some bubbles can be generated. At this time, the upper end of the water spray pipe 601 is reopened to allow the aqueous solution to carry the bubbles and be sprayed out from the water spray nozzle 602 again. Through the combination of bubbles and the aqueous solution, methylamine can be further adsorbed to avoid the situation where adsorption is not in place. When the extrusion plate 703 moves in a circular motion and contacts the water baffle 501, under the action of extrusion, the water spray pipe 601 can be driven to rotate, thereby changing the spraying direction of the water spray pipe 601, and water can be sprayed in multiple directions, so that the coverage area of ​​the water spray is larger, avoiding the situation where the spray is not in place.

[0038] When the aqueous solution sprayed from the water pipe 601 hits the water baffle 501 again, since the impact of the water pipe 601 on the water baffle 501 is intermittent, when it hits the water baffle 501, the water baffle 501 can be deformed. When the force disappears, it gradually recovers, thereby generating a certain vibration, vibrating and removing the water stains attached to the surface of the water baffle 501, thereby replacing it with a new aqueous solution to prevent the aqueous solution from being saturated and unable to absorb methylamine.

[0039] The aqueous solution that absorbs methylamine is transferred to the first storage area 1 through the drainage bucket 9 under the action of gravity, thereby achieving the purpose of recovering the aqueous solution. When the concentration sensor detects that the concentration is gradually decreasing, the stop valve is reopened to discharge the treated exhaust gas from the outlet pipe 15.

[0040] Second embodiment This embodiment also provides a treatment method for tail gas recovery and treatment equipment, and the specific operation method steps are as follows: S1. First, water is poured into the water tank 12, and the first water pump 13 is started to pour water into the first water reservoir 401, so that the aqueous solution is sprayed out through the atomizing nozzle 403.

[0041] S2. Next, the tail gas is introduced into the treatment area 3 through the air inlet pipe 14. Under the action of spraying, the methylamine is dissolved in water, thereby achieving the purpose of treating the tail gas. The aqueous solution is then collected and recovered through the drainage bucket 9 below.

[0042] S3. Then, the concentration sensor is used to detect the methylamine concentration inside the treatment area 3. When the threshold value is reached, the power of the first water pump 13 is increased. Under the action of the water pressure, the vibration component 7 is turned on, and the aqueous solution can be sprayed out through the water spray component 6. The sprayed aqueous solution hits the sputtering component 5, causing a thrust to the first water reservoir 401 to rotate, thereby driving the stirring plate 402 below to rotate.

[0043] S4. Finally, when the concentration is lower than the threshold, the power of the first water pump 13 is gradually reduced to stop the first water reservoir 401 from rotating. Under the push of the newly entering exhaust gas, the treated exhaust gas is discharged from the exhaust pipe 15.

[0044] Third embodiment This embodiment also provides an application of a tail gas recovery and treatment device in the preparation of methylamine.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tail gas recovery and treatment device, comprising a first storage area (1) and a second storage area (2), characterized in that: The second storage area (2) is arranged inside the first storage area (1), a processing area (3) is provided inside the second storage area (2), a spray assembly (4) and a sputtering assembly (5) for rotation are provided inside the processing area (3), and a concentration sensor is provided on the right side wall of the processing area (3); The spray assembly (4) comprises a first water reservoir (401), the inner bottom wall of the first water reservoir (401) is in an inverted convex shape, a plurality of stirring plates (402) and atomizing nozzles (403) are provided on the bottom surface of the first water reservoir (401), a groove is provided on the surface of the stirring plate (402), a plurality of water spray assemblies (6) are rotatably connected at the edge of the bottom surface of the first water reservoir (401), a plurality of vibration assemblies (7) for connecting to the water spray assemblies (6) are provided inside the first water reservoir (401), and each vibration assembly (7) is connected to the upper end of the water spray assembly (6); The sputtering assembly (5) comprises a water baffle (501), the cross section of the water baffle (501) is crescent-shaped, and the water baffle (501) is made of rubber.

2. The tail gas recovery and treatment equipment according to claim 1, characterized in that: A plurality of extrusion blocks (8) are provided on the upper portion of the inner wall of the processing area (3), the ends of each of the extrusion blocks (8) being close to each other are arc-shaped, and each of the extrusion blocks (8) and the vibration assembly (7) are located on the same horizontal plane. The bottom surface of the processing area (3) is connected to a drainage hopper (9), and a filter screen (10) is provided inside the drainage hopper (9).

3. The tail gas recovery and treatment equipment according to claim 1, characterized in that: The water spray assembly (6) comprises a water spray pipe (601), a water spray nozzle (602) being provided at the lower end of the water spray pipe (601), and the cross-section of the water spray nozzle (602) is in the shape of an isosceles trapezoid; a positioning plate (603) is provided on the outer surface of the water spray pipe (601), a torsion spring is provided on the upper surface of the positioning plate (603), and the other end of the torsion spring is fixedly connected to the bottom surface of the first water reservoir (401).

4. The tail gas recovery and treatment equipment according to claim 1, characterized in that: The vibration assembly (7) comprises a second water reservoir (701), a moving plate (702) being slidably connected inside the second water reservoir (701), a squeezing plate (703) being provided in the middle of one side of the moving plate (702), a plurality of impact columns (704) being provided at the edge of one side of the moving plate (702), a spring being provided on the other side of the moving plate (702), and the other end of the spring being fixedly connected to the second water reservoir (701).

5. The tail gas recovery and treatment equipment according to claim 1, characterized in that: The upper surface of the second storage area (2) is rotatably connected to a rotating shaft (11), the lower end of the rotating shaft (11) is connected to the first water reservoir (401), the upper surface of the first storage area (1) is provided with a water tank (12), the interior of the water tank (12) is provided with a first water pump (13), and the output end of the first water pump (13) passes through the water tank (12) and extends to the interior of the rotating shaft (11).

6. The tail gas recovery and treatment equipment according to claim 5, characterized in that: An air inlet pipe (14) is provided on one side of the first storage area (1), the other end of the air inlet pipe (14) passes through the second storage area (2) and is connected to the processing area (3), an activated carbon adsorption layer is provided inside the air inlet pipe (14), an air outlet pipe (15) is provided on the other side of the first storage area (1), the other end of the air outlet pipe (15) passes through the second storage area (2) and is connected to the processing area (3), two symmetrical second water pumps (16) are provided inside the first storage area (1), the output end of each second water pump (16) is connected to a conduit (17), the other end of the conduit (17) is connected to the water tank (12).

7. The method for treating tail gas recovery equipment according to claim 6, characterized in that: The steps include: S1, firstly, water is injected into the water tank (12), and the first water pump (13) is started to inject water into the first water reservoir (401), so that the aqueous solution is sprayed out through the atomizing nozzle (403); S2, secondly, the tail gas is introduced into the treatment area (3) through the air inlet pipe (14), and the methylamine is dissolved in water under the action of spraying, thereby achieving the purpose of treating the tail gas, and then the aqueous solution is collected and recovered through the drainage bucket (9) below; S3, then the concentration of methylamine in the treatment area (3) is detected by a concentration sensor. When the concentration reaches a threshold value, the power of the first water pump (13) is increased. Under the action of the water pressure, the vibration component (7) is turned on, and the aqueous solution is sprayed out through the water spray component (6). The sprayed aqueous solution hits the sputtering component (5), causing a thrust to the first water reservoir (401) to rotate, thereby driving the stirring plate (402) below to rotate; S4. Finally, when the concentration is lower than the threshold, the power of the first water pump (13) is gradually reduced to stop the rotation of the first water reservoir (401). Under the push of the newly incoming exhaust gas, the treated exhaust gas is discharged from the exhaust pipe (15).

8. Use of the tail gas recovery and treatment equipment as claimed in claim 6 in the preparation of methylamine.

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