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

Abstract

The present invention relates to the technical field of tail gas treatment equipment, and discloses a tail gas recovery and treatment equipment, a treatment method and an application in methylamine preparation. It includes a first storage area and a second storage area. The second storage area is arranged inside the first storage area. A treatment area is provided inside the second storage area. A spraying assembly and a sputtering assembly for rotation are provided inside the treatment area. A concentration sensor is provided on the right side wall of the treatment area. The spraying assembly includes a first water storage device. Through the mutual cooperation of the vibration assembly and the extrusion block, the water spraying assembly can perform intermittent water spraying, causing the water baffle to vibrate, and vibrating and separating the water stains attached to the surface of the water baffle, avoiding the inability to absorb methylamine due to saturated aqueous solution. By providing the water spraying assembly and the sputtering assembly, the first water storage device can drive the stirring plate to rotate, causing the tail gas inside the treatment area to rotate, and cooperating with the sprayed aqueous solution to enable the tail gas to fully contact the aqueous solution.

Description

Technical Field

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

[0002] In the process of chemical production, especially in the preparation of methylamine, tail gas containing harmful substances such as ammonia and methylamine will be generated. If the tail gas is directly discharged without effective treatment, it will cause serious pollution to the environment. At present, the tail gas treatment technology mainly adopts methods such as physical absorption, chemical absorption, adsorption and catalysis, and usually uses tail gas recovery treatment equipment for treatment.

[0003] Chinese Patent with publication number CN105457443A discloses a tail gas absorption tower and a treatment device for molecular sieve calcination tail gas. The present invention discloses a tail gas absorption tower, which includes a shell and an upper tray, a packing layer and a bottom tray arranged in the shell, and the internal space of the shell is divided into a washing liquid spraying area above the upper tray, an adsorption area defined by the upper tray and the bottom tray, and an air flow inlet area below the bottom tray from top to bottom through the upper tray and the bottom tray. It is characterized in that the bottom tray is composed of an air flow deflector layer and a blocking grille net located above the air flow deflector layer, and the deflectors in the air flow deflector layer are inclined. When this device is in use, only by a simple rotating air flow mode, the mixing intensity of most gases and materials can be increased, but the waste gas in the edge area cannot be treated.

[0004] Chinese Patent with publication number CN102895863A discloses an absorption device for cyanuric acid production tail gas and an absorption method thereof. The absorption device for cyanuric acid production tail gas includes 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 for preventing ammonia-containing tail gas from overflowing when the furnace door opens and closes is installed at the furnace door of the urea polycondensation furnace. The gas collecting chamber is connected to a secondary absorption tower, and the secondary absorption tower is connected to the saturated absorption tower. Although this device can treat waste gas, it cannot be adjusted accordingly according to the concentration of the waste gas and cannot carry out targeted treatment on it.

[0005] Moreover, in the above-mentioned prior art, most of the tail gas recovery treatment equipment uses a spraying method for treatment during 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, too little aqueous solution cannot be treated after saturation. Summary of the Invention

[0006] The purpose of the present invention is to provide tail gas recovery treatment equipment, a treatment method and an application thereof in the preparation of methylamine to solve the problems raised in the above background art.

[0007] To achieve the above object, the present invention provides the following technical solution: An exhaust gas recovery and treatment device includes a first storage area and a second storage area. The second storage area is disposed inside the first storage area. A treatment area is provided inside the second storage area. A spraying component and a sputtering component for rotation are provided inside the treatment area. A concentration sensor is provided on the right side wall of the treatment area.

[0008] The spraying component includes a first water storage device. The inner bottom wall of the first water storage device is in an inverted convex shape. A plurality of stirring plates and atomizing nozzles are provided on the bottom surface of the first water storage device. Grooves are formed on the surface of the stirring plates. A plurality of water spraying components are rotatably connected to the edge of the bottom surface of the first water storage device. A plurality of vibration components for communicating with the water spraying components are provided inside the first water storage device, and the upper ends of each vibration component and the water spraying component are connected in communication.

[0009] The sputtering component includes a water baffle. The cross section of the water baffle is in a crescent shape, and the water baffle is made of rubber material.

[0010] Preferably, a plurality of extrusion blocks are provided on the upper part of the inner wall of the treatment area. One end of each extrusion block close to each other is in an arc shape, and each extrusion block and the vibration component are in the same horizontal plane. A liquid discharge hopper is communicated with the bottom surface of the treatment area. A filter screen is provided inside the liquid discharge hopper.

[0011] Preferably, the water spraying component includes a water spraying pipe. A water spraying nozzle is provided at the lower end of the water spraying pipe, and the cross section of the water spraying nozzle is in an isosceles trapezoid shape. A positioning plate is provided on the outer surface of the water spraying 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 storage device.

[0012] Preferably, the vibration component includes a second water storage device. A moving plate is slidably connected inside the second water storage device. 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 storage device.

[0013] Preferably, a rotating shaft is rotatably connected to the upper surface of the second storage area. The lower end of the rotating shaft is communicated with the first water storage device. A water tank is provided on the upper surface of the first storage area. A first water pump is provided inside the water tank. The output end of the first water pump penetrates through the water tank and extends into the inside of the rotating shaft.

[0014] Preferably, an air inlet pipe is provided on one side of the first storage area. The other end of the air inlet pipe penetrates 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 penetrates through the second storage area and is connected to the treatment area. Two symmetrically arranged second water pumps are provided inside the first storage area. The output end of each second water pump is connected to a conduit, and the other end of the conduit is connected to a water tank.

[0015] The present invention also provides a treatment method for the tail gas recovery treatment device. The specific operation method steps are as follows:

[0016] S1. First, inject water into the water tank, start the first water pump to inject water into the first water storage device, and make the aqueous solution spray out through the atomizing nozzles.

[0017] S2. Secondly, introduce the tail gas into the treatment area through the air inlet pipe. Under the action of spraying, methylamine is dissolved in water, so as to achieve the purpose of treating the tail gas. Then, collect and recycle the aqueous solution through the drain hopper below.

[0018] S3. Then, detect the methylamine concentration inside the treatment area through the concentration sensor. When the threshold is reached, increase the power of the first water pump. Under the action of water pressure, the vibration assembly is opened, and the aqueous solution can spray out through the water spraying assembly. The sprayed aqueous solution impacts the sputtering assembly to cause a thrust on the first water storage device to make it rotate, driving the stirring plate below to rotate.

[0019] S4. Finally, when the concentration is lower than the threshold, gradually reduce the power of the first water pump to stop the rotation of the first water storage device. Under the push of the newly introduced tail gas, the treated tail gas is discharged from the air outlet pipe.

[0020] The present invention also provides an application of the tail gas recovery treatment device in the preparation of methylamine.

[0021] The technical effects of the present invention:

[0022] 1. Through the first water storage device and two groups of atomizing nozzles, the present invention can change the water spraying amount of the atomizing nozzles according to the amount of the aqueous solution inside the first water storage device, so as to adjust the water spraying amount according to the concentration of the tail gas, avoiding the situation of insufficient treatment.

[0023] 2. By providing the water spraying assembly and the sputtering assembly, the present invention can make the first water storage device drive the stirring plate to rotate, make the tail gas inside the treatment area rotate, and cooperate with the sprayed aqueous solution to make the tail gas fully contact with the aqueous solution, increasing the efficiency of treating the tail gas. Water splashes can be generated under the sputtering assembly, and the water splashes cooperate with the sprayed aqueous solution to further improve the treatment efficiency.

[0024] 3. The present invention is provided with a vibration assembly, which can generate water bubbles through vibration and release the water bubbles through a water spraying assembly. 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 assembly and the extrusion block, the water spraying assembly 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

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the front view cross-sectional structure of the first storage area of the present invention;

[0027] Figure 3 is a schematic diagram of the right view cross-sectional structure of the first storage area of the present invention;

[0028] Figure 4 is a schematic diagram of the top view cross-sectional structure of the first storage area of the present invention;

[0029] Figure 5 is a schematic diagram of the structure of the first water storage device of the present invention;

[0030] Figure 6 is a cross-sectional structure diagram of the first water storage device of the present invention;

[0031] Figure 7 is a schematic diagram of the structure of the water spraying device of the present invention;

[0032] Figure 8 is a schematic diagram of the structure of the second water storage device of the present invention;

[0033] Figure 9 is a cross-sectional structure diagram of the second water storage device of the present invention.

[0034] In the figure: 1. First storage area; 2. Second storage area; 3. Treatment area; 4. Spraying assembly; 401. First water storage device; 402. Stirring plate; 403. Atomizing nozzle; 5. Sputtering assembly; 501. Water baffle; 6. Water spraying assembly; 601. Water spraying pipe; 602. Water spraying nozzle; 603. Positioning plate; 7. Vibration assembly; 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. Pipe. DETAILED DESCRIPTION OF THE INVENTION

[0035] 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.

[0036] First Embodiment

[0037] As Figures 1 to 9 shown, a tail gas recovery and treatment device 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 overflowing methylamine to avoid leakage of methylamine. The second storage area 2 is arranged inside the first storage area 1. A pressure valve is provided 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 open to allow part of the tail gas to enter the first storage area 1, enabling the tail gas to contact the aqueous solution, thereby enabling treatment of the tail gas. A treatment area 3 is provided inside the second storage area 2. The treatment area 3 can perform spray treatment on the incoming tail gas and treat the tail gas by the fact that methylamine is 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 aqueous solution is sprayed, to avoid excessive concentration and incomplete absorption of methylamine by the aqueous solution. The lower the concentration, the less the aqueous solution is sprayed, reducing the use of water resources.

[0038] The spray component 4 includes a first water storage device 401. The inner bottom wall of the first water storage device 401 is in an inverted convex shape. The bottom surface of the first water storage device 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 storage device 401 are scarce and the water resources in the first water storage device 401 are lower than the second horizontal plane, watering can be carried out through a set of atomizing nozzles 403 below. When the water resources inside the first water storage device 401 gradually increase until they exceed the second horizontal plane, the water resources can be watered through another set of atomizing nozzles 403, increasing the amount of watering gradually to avoid the situation where the water resources cannot absorb methylamine effectively.

[0039] The bottom surface of the first water storage device 401 is provided with a plurality of stirring plates 402 and atomizing nozzles 403. One group of atomizing nozzles 403 is connected to the first horizontal plane of the first water storage device 401, and the other group of atomizing nozzles 403 is connected to the second horizontal plane of the first water storage device 401. Thus, the spraying amount can be adjusted according to the water injection amount. The more water is injected into the first water storage device 401, the more both groups of atomizing nozzles 403 spray water, and then the purpose of adjusting the water spraying amount is achieved. The surface of the stirring plate 402 is provided with grooves, which can enable the stirring plate 402 to stir more gas, and thus can drive the gas to rotate. A plurality of water spraying components 6 are rotatably connected to the edge of the bottom surface of the first water storage device 401. The water spraying components 6 can further increase the water spraying amount. At the same time, the water columns ejected can generate mutual forces when hitting the sputtering component 5, pushing the water spraying components 6 to drive the first water storage device 401 to rotate. A plurality of vibration components 7 for communicating with the water spraying components 6 are arranged inside the first water storage device 401, and each vibration component 7 is connected to the upper end of the water spraying component 6. When the vibration component 7 vibrates, some bubbles can be generated. After these bubbles are ejected, they can also adsorb methylamine, thereby further improving the efficiency of tail gas treatment.

[0040] The sputtering component 5 includes a water baffle 501. The sputtering component 5 can break up the water column hitting the surface to generate water splashes, and cooperate with the sprayed aqueous solution through the water splashes, thereby further improving the efficiency of tail gas treatment. The cross-section of the water baffle 501 is crescent-shaped, which can change the movement direction of the aqueous solution hitting the surface of the water baffle 501 to make the water rotate, avoiding some methylamine from being adsorbed on the surface of the water baffle 501 during treatment. And the water baffle 501 is made of rubber material, which can deform when impacted and gradually recover after the acting force disappears, so as to generate a certain vibration, vibrate and separate the water stains attached to the surface of the water baffle 501, thereby replacing the new aqueous solution and avoiding the aqueous solution from being saturated and unable to absorb methylamine.

[0041] A plurality of extrusion blocks 8 are arranged on the upper part of the inner wall of the treatment area 3. One end of each extrusion block 8 close to each other is arc-shaped, which can avoid getting stuck when contacting the extrusion plate 703. Each extrusion block 8 and the vibration component 7 are on the same horizontal plane, so that the vibration component 7 can contact the extrusion block 8 when rotating with the first water storage device 401, avoiding dislocation. A drain hopper 9 is communicated with the bottom surface of the treatment area 3. The drain hopper 9 can collect the aqueous solution adsorbed with methylamine. A filter screen 10 is arranged inside the drain hopper 9, and the filter screen 10 can effectively clean some impurities insoluble in water.

[0042] The water spraying assembly 6 includes a water spraying pipe 601. The water spraying pipe 601 is in an inverted '7' shape and can change the direction of the sprayed water column so that the water column can impact the water baffle 501 within a certain period of time. A water spraying nozzle 602 is provided at the lower end of the water spraying pipe 601, and the cross-section of the water spraying nozzle 602 is in an isosceles trapezoid shape, 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 spraying pipe 601, and a torsion spring is provided on the upper surface of the positioning plate 603. The other end of the torsion spring is fixedly connected to the bottom surface of the first water storage device 401. The normal position of the water spraying pipe 601 is inclined to avoid the situation that the water spraying is not in place when the water spraying pipe 601 sprays water. At the same time, under the action of the torsion spring, it can play a positioning role. When subjected to an external force, the water spraying pipe 601 can change its direction, so that it can spray water in multiple directions, making the coverage area of the water spraying larger and avoiding the situation that the spraying is not in place.

[0043] The vibration assembly 7 includes a second water storage device 701. A moving plate 702 is slidably connected inside the second water storage device 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 storage device 701.

[0044] During use, the aqueous solution inside the second water storage device 701 gradually increases. Under the action of the water pressure, the moving plate 702 drives the extrusion plate 703 to move outward. When the rotating extrusion plate 703 impacts the extrusion block 8, under the extrusion action, the extrusion plate 703 drives the moving plate 702 to contract inward, compressing the spring to generate a restoring elastic force. When passing over the extrusion block 8, the extrusion force disappears, and the elastic potential energy is released, causing the moving plate 702 to drive the impact columns 704 to quickly impact the inner wall of the second water storage device 701, causing the second water storage device 701 to vibrate. Under the action of the vibration, some bubbles can be generated. After these bubbles are ejected, they can also adsorb methylamine, thereby further improving the efficiency of tail gas treatment.

[0045] A rotating shaft 11 is rotatably connected to the upper surface of the second storage area 2. The lower end of the rotating shaft 11 is communicated with the first water storage device 401. A water tank 12 is provided on the upper surface of the first storage area 1. A first water pump 13 is provided inside the water tank 12. The output end of the first water pump 13 penetrates through the water tank 12 and extends into the inside of the rotating shaft 11, and can introduce the aqueous solution inside the water tank 12 into the first water storage device 401 through the first water pump 13, so as to achieve 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 inflow is increased to avoid the situation that the aqueous solution is not enough for use.

[0046] On one side of the first storage area 1, there is an air inlet pipe 14. The other end of the air inlet pipe 14 penetrates through the second storage area 2 and is connected to the processing area 3 in communication, enabling the tail gas to enter the interior of the processing area 3 through the air inlet pipe 14. After the processing is completed, it is discharged through the air outlet pipe 15. An activated carbon adsorption layer is provided inside the air inlet pipe 14, and the activated carbon can preliminarily process the tail gas. On the other side of the first storage area 1, there is an air outlet pipe 15. A stop valve is provided inside the air outlet pipe 15. The other end of the air outlet pipe 15 penetrates through the second storage area 2 and is connected to the processing area 3 in communication. Two symmetrically arranged 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, and the other end of the conduit 17 is connected to the water tank 12. Under the action of the second water pumps 16, the collected aqueous solution can be transported to the interior of the water tank 12 through the conduit 17, thereby achieving the purpose of water circulation and further reducing waste (since the methylamine is processed by spraying, too much aqueous solution is not saturated. The solution is collected and diluted and can be recycled again).

[0047] During use, first, water is injected into the water tank 12 to fill the aqueous solution inside the water tank 12 to avoid the situation of insufficient aqueous solution after startup. Then, the first water pump 13 is started to inject water into the first water storage device 401 (at this time, the water inflow is small, and the atomizing nozzle 403 in the middle can be level with the water inflow), so that the aqueous solution is sprayed out through the atomizing nozzle 403 located in the middle, and the tail gas is transported into the air inlet pipe 14. Under the transmission of the air inlet pipe 14, the tail gas enters the processing area 3. Under the action of the sprayed aqueous solution, the tail gas inside the processing area 3 can be effectively processed, the methylamine is absorbed, and the methylamine concentration inside the tail gas is reduced. After the processing is completed, it is then discharged through the air outlet pipe 15.

[0048] When the concentration sensor monitors that the methylamine concentration inside the processing area 3 reaches the first threshold, the stop valve closes, the power of the first water pump 13 is increased, the water inflow gradually increases, and the water level of the aqueous solution entering the first water storage device 401 gradually rises until it exceeds the second water level of the first water storage device 401. The excess aqueous solution can be sprayed out through another group of atomizing nozzles 403. By increasing the number of atomizing nozzles 403, the water spraying amount is increased, and the atomizing nozzles 403 located at the second water level are outside the first water storage device 401. Therefore, when spraying the aqueous solution, the covered area is wider, avoiding the situation of incomplete coverage (since the methylamine concentration increases and cannot be discharged in time through the air outlet pipe 15, the tail gas gradually spreads and fills the processing area 3).

[0049] When the methylamine concentration inside the treatment area 3 monitored by the concentration sensor reaches the second threshold, increase the power of the first water pump 13 again to increase the water inflow until the internal space of the first water storage device 401 is filled, and part of the aqueous solution can enter each second water storage device 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 blocking moving plate 702 gradually crosses over the upper end of the water spray pipe 601, connecting the second water storage device 701 and the water spray pipe 601, enabling the aqueous solution to be sprayed out from the water spray nozzle 602 through the water spray pipe 601, and making the generated water column directly impact the water baffle 501.

[0050] When the water column impacts and breaks the water baffle 501, a certain mutual force can be generated to push the water spray assembly 6 to drive the first water storage device 401 to rotate. At the same time, part of the water column that impacts the water baffle 501 is damaged to generate water splashes. Through the cooperation of the water splashes and the sprayed aqueous solution, the treatment efficiency of the tail gas can be further improved. Under the impact of the water column, the first water storage device 401 rotates, driving multiple stirring plates 402 to perform circular motion. Under the action of the stirring plates 402, the tail gas inside the treatment area 3 is driven to rotate. Through the rotation of the tail gas and the sprayed aqueous solution, the tail gas can fully contact the aqueous solution, avoiding the situation where the aqueous solution fails to absorb methylamine thoroughly.

[0051] When the first water storage device 401 gradually rotates, it drives the vibration assembly 7 to perform circular motion, causing the extrusion plate 703 to contact 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 contract inward, compressing the spring to generate a restoring elastic force. At the same time, the moving plate 703 is reset to close the upper end of the water spray pipe 601 again, preventing the aqueous solution from spraying out from here, thereby reducing waste. Since intermittent water spraying is adopted, a large amount of water resources can be saved.

[0052] When the extrusion plate 703 crosses over the extrusion block 8, the extrusion force disappears, and the elastic potential energy is released, causing the moving plate 702 to drive the impact column 704 to quickly impact the inner wall of the second water storage device 701, causing the second water storage device 701 to vibrate. Under the action of the vibration, some bubbles can be generated. At this time, the upper end of the water spray pipe 601 is reopened, enabling the aqueous solution to carry bubbles and be sprayed out from the water spray nozzle 602 again. Through the cooperation of the bubbles and the aqueous solution, the adsorption of methylamine can be further enhanced, avoiding the situation of insufficient adsorption. When the extrusion plate 703 contacts the water baffle 501 during circular motion, under the extrusion action, it can drive the water spray pipe 601 to rotate, thereby changing the spraying direction of the water spray pipe 601, enabling multi-directional water spraying, increasing the spraying coverage area, and avoiding the situation of incomplete spraying.

[0053] When the aqueous solution ejected from the water spray pipe 601 hits the water baffle 501 again, since the impact caused by the water spray pipe 601 on the water baffle 501 is intermittent, when it hits the water baffle 501, it can cause the water baffle 501 to deform. When the acting force disappears, it gradually returns to its original state, thereby being able to generate a certain vibration, vibrating and detaching the water stains attached to the surface of the water baffle 501, so as to replace the new aqueous solution and avoid the aqueous solution being saturated and unable to absorb methylamine.

[0054] The aqueous solution that absorbs methylamine, under the action of gravity, is transmitted to the inside of the first storage area 1 through the drain hopper 9, so as to achieve the purpose of recycling the aqueous solution. When the concentration sensor detects that the concentration gradually decreases, the cut-off valve is opened again, and the treated tail gas is discharged from the air outlet pipe 15.

[0055] Second Embodiment

[0056] This embodiment also provides a processing method for the tail gas recovery and treatment equipment. The specific operation method steps are as follows:

[0057] S1. First, inject water into the water tank 12, start the first water pump 13 to inject water into the first water storage device 401, and make the aqueous solution spray out through the atomizing nozzle 403.

[0058] S2. Secondly, introduce the tail gas into the processing area 3 through the air inlet pipe 14. Under the action of spraying, dissolve methylamine in water, so as to achieve the purpose of treating the tail gas, and then collect and recycle the aqueous solution through the drain hopper 9 below.

[0059] S3. Then, detect the methylamine concentration inside the processing area 3 through the concentration sensor. When it reaches the threshold value, increase the power of the first water pump 13. Under the action of water pressure, open the vibration assembly 7, and the aqueous solution can spray out through the water spraying assembly 6. The sprayed aqueous solution hits the sputtering assembly 5 to cause a thrust on the first water storage device 401 to make it rotate, driving the stirring plate 402 below to rotate.

[0060] S4. Finally, when the concentration is lower than the threshold value, gradually reduce the power of the first water pump 13 to stop the rotation of the first water storage device 401. Under the push of the newly incoming tail gas, the treated tail gas is discharged from the air outlet pipe 15.

[0061] Third Embodiment

[0062] This embodiment also provides an application of the tail gas recovery and treatment equipment in the preparation of methylamine.

[0063] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within 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; A plurality of extrusion blocks (8) are provided on the upper part of the inner wall of the processing area (3), and the ends of each of the extrusion blocks (8) that are close to each other are arc-shaped, and each of the extrusion blocks (8) and the vibration assembly (7) are located at 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); 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).

2. 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).

3. 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).

4. The tail gas recovery and treatment equipment according to claim 3, 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).

5. The method for treating tail gas recovery equipment according to claim 4, 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).

6. Use of the tail gas recovery and treatment equipment as claimed in claim 4 in the preparation of methylamine.

Images