Desulfurization and denitrification device for treating diketene cracking tail gas

Abstract

The utility model discloses a desulfurization and denitrification device for treating diketene cracking tail gas, and belongs to the technical field of desulfurization and denitrification. A desulfurization and denitrification device for diketene cracking tail gas treatment comprises a fixing table, a controller is arranged on the outer wall of the fixing table, a regeneration reaction tank and a liquid ammonia storage tank are arranged on the outer wall of the fixing table, a desulfurization assembly and a denitrification assembly comprise a desulfurization tank and a denitrification tank correspondingly, and the output end of a rotating motor extends into a mounting cylinder and then is connected with a transmission rod. According to the device, the desulfurization effect is more uniform and effective, the time required for desulfurization can be effectively shortened, the desulfurization effect is more sufficient, ammonia gas is released from the plurality of stirring rods, so that the ammonia gas can be ensured to be discharged more uniformly in the stirring process, the ammonia gas and tail gas can be mixed more conveniently, and the desulfurization effect is improved. The denitration reaction efficiency and effect of the tail gas are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization and denitrification technology, and more specifically, to a desulfurization and denitrification device for treating diketene cracking tail gas. Background Technology

[0002] Diketene cracking tail gas is a complex waste gas produced during the production of diketene, typically containing sulfur dioxide, nitrogen oxides, carbon monoxide, carbon dioxide, hydrogen, methane, ethylene, etc. Common desulfurization and denitrification devices for it include sodium-calcium double alkali desulfurization devices, which use sodium alkali solution to absorb sulfur dioxide in the desulfurization tower, and then regenerate sodium alkali with lime slurry in the reaction tank to achieve recycling and desulfurization; there are also selective catalytic reduction (SCR) denitrification devices, which use liquid ammonia or urea as the ammonia source. Under the action of a catalyst in the denitrification reactor, ammonia reacts with nitrogen oxides to produce nitrogen and water, which are then discharged to achieve desulfurization and denitrification.

[0003] In current industrial production, existing desulfurization devices mainly use sodium alkali solution spraying for desulfurization. The specific process is as follows: sodium alkali solution is sprayed into the desulfurization tank to fully contact the tail gas, thereby absorbing the sulfur dioxide. Then, the absorbent flows into the reaction tank and reacts with lime slurry to regenerate the sodium alkali, thus achieving the purpose of recycling and desulfurization. However, this desulfurization method has obvious defects. During the sodium alkali solution spraying process, the spray uniformity is not good, which makes it difficult for the tail gas to contact the sodium alkali solution quickly and fully. This not only prevents some sulfur dioxide from being absorbed in time, but also prolongs the entire desulfurization reaction time, which undoubtedly greatly affects the desulfurization efficiency and effect of the tail gas, increases industrial production costs, and is not conducive to meeting environmental protection standards.

[0004] Moreover, existing denitrification devices generally use ammonia and tail gas to react and remove nitrogen. However, in practical applications, the mixing method is relatively simple, relying solely on a stirring device to mix the tail gas and ammonia. In this way, the uniformity of ammonia injection is not ideal, and the ammonia is unevenly distributed in the tail gas, resulting in insufficient reaction in some areas. At the same time, due to the poor mixing effect, ammonia and tail gas need to be mixed for a long time to achieve a good denitrification effect. This not only reduces the denitrification efficiency but also limits the processing capacity of the device. When facing large-scale tail gas treatment, it is difficult to meet the demand for efficient and stable production.

[0005] In view of this, we propose a desulfurization and denitrification device for treating diketene cracking tail gas. Utility Model Content

[0006] Technical problems to be solved

[0007] The purpose of this invention is to provide a desulfurization and denitrification device for treating diketene cracking tail gas, so as to solve the problems mentioned in the background art.

[0008] A desulfurization and denitrification device for treating diketene cracking tail gas includes a fixed platform. A controller is installed on the outer wall of the fixed platform. A regeneration reaction tank and a liquid ammonia storage tank are installed on the outer wall of the fixed platform. A delivery pump and a gas pump are respectively installed on the top of the regeneration reaction tank and the liquid ammonia storage tank. The output ends of the delivery pump and the gas pump are respectively connected to a liquid delivery pipe and a gas delivery pipe. An injection port is also provided on the top of the liquid ammonia storage tank. A desulfurization component and a denitrification component are installed on the top of the fixed platform. The desulfurization component and the denitrification component each include a desulfurization tank and a denitrification tank. An electric valve is connected between the desulfurization tank and the denitrification tank. A cover plate is installed on the top of the desulfurization tank. A tail gas inlet pipe is installed on the top of the cover plate. A fixing cover and a wind guide cover are installed at the bottom of the cover plate. A second cover plate is installed on the top of the denitrification tank. An installation cylinder is installed at the bottom of the denitrification tank. A rotary motor is installed at the bottom of the denitrification tank. The output end of the rotary motor extends into the installation cylinder and is connected to a transmission rod.

[0009] Preferably, a conveying pipe is provided at the bottom of the desulfurization tank, and an electric valve is sleeved on the outer circumference of the conveying pipe. The end of the conveying pipe extends into the regeneration reaction tank.

[0010] Preferably, the fixed cover has an air outlet on its outer circumference, a connecting cylinder is provided at the bottom of the fixed cover, a spray head is provided at the bottom of the connecting cylinder, the end of the infusion pipe is connected to the outer circumference of the connecting cylinder, and the fixed cover is located inside the air guide cover.

[0011] Preferably, the outer wall of the denitrification tank is provided with an exhaust pipe, and an electric valve is sleeved on the outer circumference of the exhaust pipe. The inner wall of the denitrification tank is provided with an electric heating ring.

[0012] Preferably, the outer circumference of the transmission rod is provided with a stirring blade and a stirring rod, and the outer circumference of the plurality of stirring rods is provided with through openings.

[0013] Preferably, a rotating air injection seat is rotatably connected to the top of the transmission rod, and the end of the air pump is connected to the top of the rotating air injection seat. Beneficial effects

[0014] Compared with existing technologies, the advantages of this invention are as follows: When desulfurizing exhaust gas, the exhaust gas can first be injected into the exhaust gas inlet pipe. Then, the exhaust gas will be evenly distributed and discharged through multiple air outlets on the outer circumference of the fixed cover. After that, the exhaust gas can be evenly passed through the spray head by the air guide hood. At this time, the liquid pump and the spray head can be activated to spray out the sodium alkali solution, so that the exhaust gas can be more evenly and fully contacted, thereby achieving the purpose of desulfurization. The absorbed sodium alkali solution can be flowed into the regeneration reaction tank by opening the second electric valve and react with lime milk to regenerate the sodium alkali and achieve recycling. The desulfurization effect of this device is more uniform and effective, which can effectively reduce the time required for desulfurization and the desulfurization effect is more complete.

[0015] After the exhaust gas is desulfurized, it can enter the installation cylinder inside the denitrification tank by opening the electric valve. Then, the ammonia gas volatilized from the liquid ammonia storage tank can be injected into the transmission rod by the gas pump. After that, it is discharged through multiple stirring rods with through ports. In conjunction with the rotation of the rotary motor, the stirring blades and stirring rods can stir the exhaust gas and ammonia gas. Since the ammonia gas is released from multiple stirring rods, it can ensure that the ammonia gas is discharged more evenly during the stirring process, which makes it easier for the ammonia gas to mix with the exhaust gas, effectively improving the denitrification reaction efficiency and effect of the exhaust gas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the fixed platform structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the desulfurization component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the denitrification component structure of this utility model;

[0020] The following are the labels in the diagram: 100, Fixed platform; 110, Controller; 120, Regeneration reaction tank; 121, Transfer pump; 130, Liquid ammonia storage tank; 131, Gas pump; 132, Inlet; 200, Desulfurization tank; 210, Electric valve one; 220, Transfer pipe; 230, Electric valve two; 240, Cover plate one; 241, Tail gas inlet pipe; 242, Fixed cover; 243, Air outlet; 244, Connecting cylinder; 245, Spray head; 246, Air guide hood; 300, Denitrification tank; 310, Exhaust pipe; 320, Electric valve three; 330, Cover plate two; 340, Mounting cylinder; 350, Rotary motor; 360, Transmission rod; 361, Stirring blade; 362, Stirring rod; 363, Rotating gas injection seat; 370, Heating ring. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] A desulfurization and denitrification device for treating diketene cracking tail gas includes a fixed platform 100, a controller 110 is provided on the outer wall of the fixed platform 100, a regeneration reaction tank 120 and a liquid ammonia storage tank 130 are provided on the outer wall of the fixed platform 100, a delivery pump 121 and a gas delivery pump 131 are respectively provided on the top of the regeneration reaction tank 120 and the liquid ammonia storage tank 130, the output ends of the delivery pump 121 and the gas delivery pump 131 are respectively connected to a liquid delivery pipe and a gas delivery pipe, the top of the liquid ammonia storage tank 130 is also provided with an injection port 132, and a desulfurization component and a denitrification component are provided on the top of the fixed platform 100, the desulfurization component and the denitrification component respectively include a desulfurization tank 200 and a denitrification tank 300;

[0026] In some embodiments, a liquid level sensor is provided on the inner wall of the desulfurization tank 200 to control the electric valve 230 to open when the sodium alkali solution inside reaches a certain level, so that the sodium alkali solution can reach the regeneration reaction tank 120 for regeneration, and the regeneration reaction tank 120 is provided with lime slurry.

[0027] An electric valve 210 is connected between the desulfurization tank 200 and the denitrification tank 300. The top of the desulfurization tank 200 is equipped with a cover plate 240, and the top of the cover plate 240 is equipped with a tail gas inlet pipe 241. The bottom of the cover plate 240 is equipped with a fixing cover 242 and a wind guide cover 246. The top of the denitrification tank 300 is equipped with a cover plate 330, and the bottom of the cover plate 330 is equipped with an installation cylinder 340. The bottom of the denitrification tank 300 is equipped with a rotary motor 350, and the output end of the rotary motor 350 extends into the installation cylinder 340 and is connected to a transmission rod 360.

[0028] In some embodiments, the drive rod 360 is hollow, and its plurality of stirring rods 362 are identical to the internal cavity.

[0029] Specifically, a conveying pipe 220 is installed at the bottom of the desulfurization tank 200, and an electric valve 230 is sleeved on the outer circumference of the conveying pipe 220. The end of the conveying pipe 220 extends into the regeneration reaction tank 120.

[0030] Furthermore, an air outlet 243 is provided on the outer circumference of the fixed cover 242, a connecting cylinder 244 is provided at the bottom of the fixed cover 242, a spray head 245 is provided at the bottom of the connecting cylinder 244, the end of the infusion pipe is connected to the outer circumference of the connecting cylinder 244, and the fixed cover 242 is located inside the air guide cover 246 to facilitate the exhaust gas to fully contact the sodium alkali solution.

[0031] Furthermore, the outer wall of the denitrification tank 300 is equipped with an exhaust pipe 310, and an electric valve 320 is sleeved on the outer circumference of the exhaust pipe 310. The inner wall of the denitrification tank 300 is equipped with an electric heating ring 370, which facilitates the use of the electric heating ring 370 to ensure the temperature during denitrification.

[0032] In some embodiments, an insulation sleeve can be fitted onto the outer wall of the 300mm circumference of the denitrification tank. The insulation sleeve is existing technology and does not need to be described in detail.

[0033] Furthermore, the outer circumference of the transmission rod 360 is provided with stirring blades 361 and stirring rods 362, and multiple stirring rods 362 have through openings on their outer circumferences. This facilitates more even emission of ammonia gas during stirring.

[0034] It is worth noting that a rotating air injection seat 363 is rotatably connected to the top of the transmission rod 360, and the end of the air pump 131 is connected to the top of the rotating air injection seat 363 to avoid affecting the rotation of the transmission rod 360.

[0035] In some embodiments, the device can be powered by an external conventional power source, and the device can be controlled by the controller 110. All of the above are existing technologies.

[0036] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0037] Working principle: When desulfurizing tail gas, the tail gas is first injected into the tail gas inlet pipe 241. The tail gas is then evenly distributed and discharged through multiple air outlets 243 on the outer circumference of the fixed cover 242. Following the action of the air guide hood 246, the discharged tail gas passes evenly through the spray heads 245. At this point, the liquid pump 121 and the spray heads 356 are activated to spray out the sodium alkali solution, ensuring more even and thorough contact with the tail gas, thus achieving desulfurization. The absorbed sodium alkali solution can be flowed into the regeneration reaction tank 120 by opening the electric valve 230 to react with lime slurry, regenerating the sodium alkali and enabling recycling. This device provides a more uniform and effective desulfurization effect. This method can effectively reduce the time required for desulfurization and achieve a more thorough desulfurization effect. After the tail gas is desulfurized, it can enter the installation cylinder 340 inside the denitrification tank 300 by opening the electric valve 210. Then, the ammonia gas volatilized inside the liquid ammonia storage tank 130 can be injected into the transmission rod 360 by the gas pump 131. After that, it is discharged through multiple stirring rods 362 with through ports. This further cooperates with the rotation of the rotary motor 350, so that the stirring blades 361 and stirring rods 362 can stir the tail gas and ammonia gas. Since the ammonia gas is released from multiple stirring rods 362, it can ensure that the ammonia gas is discharged more evenly during the stirring process, which makes it easier for the ammonia gas to mix with the tail gas, effectively improving the denitrification reaction efficiency and effect of the tail gas.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for desulfurization and denitrification of dioxymethylene cracking tail gas, comprising a fixed platform (100), characterized in that: The fixed platform (100) is provided with a controller (110), the fixed platform (100) is provided with a regeneration reaction tank (120) and a liquid ammonia storage tank (130), the top of the regeneration reaction tank (120) and the liquid ammonia storage tank (130) is respectively provided with a delivery pump (121) and a gas delivery pump (131), the output end of the delivery pump (121) and the gas delivery pump (131) is connected with a liquid delivery pipe and a gas delivery pipe respectively, the top of the liquid ammonia storage tank (130) is further provided with an injection port (132), the top of the fixed platform (100) is provided with a desulfurization assembly and a denitration assembly, the desulfurization assembly and the denitration assembly respectively include a desulfurization tank (200) and a denitration tank (300), the desulfurization tank (200) and the denitration tank (300) are connected with an electric valve (210), the top of the desulfurization tank (200) is provided with a cover plate (240), the top of the cover plate (240) is provided with a tail gas inlet pipe (241), the bottom of the cover plate (240) is provided with a fixed cover (242) and a wind deflector (246), the top of the denitration tank (300) is provided with a cover plate (330), the bottom of the cover plate (330) is provided with a mounting cylinder (340), the bottom of the denitration tank (300) is provided with a rotary motor (350), the output end of the rotary motor (350) extends to the inside of the mounting cylinder (340) and is connected with a transmission rod (360).

2. The device for treating the desulfurization and denitrification of diketene cracking tail gas according to claim 1, characterized in that: The bottom of the desulfurization tank (200) is provided with a delivery pipe (220), the circumferential outer wall of the delivery pipe (220) is sleeved with an electric valve (230), and the tail end of the delivery pipe (220) extends to the inside of the regeneration reaction tank (120).

3. The device for treating the desulfurization and denitrification of diketene cracking tail gas according to claim 2, characterized in that: The circumferential outer wall of the fixed cover (242) is provided with an air outlet (243), the bottom of the fixed cover (242) is provided with a connecting cylinder (244), the bottom of the connecting cylinder (244) is provided with a shower head (245), the tail end of the liquid delivery pipe is connected to the circumferential outer wall of the connecting cylinder (244), and the fixed cover (242) is arranged in the wind deflector (246).

4. The device for treating the desulfurization and denitrification of diketene cracking tail gas according to claim 3, characterized in that: The outer wall of the denitration tank (300) is provided with an exhaust pipe (310), the circumferential outer wall of the exhaust pipe (310) is sleeved with an electric valve (320), and the inner wall of the denitration tank (300) is provided with an electric heating ring (370).

5. The device for treating the desulfurization and denitrification of diketene cracking tail gas according to claim 4, characterized in that: The circumferential outer wall of the transmission rod (360) is provided with stirring blade plates (361) and stirring rods (362), and the circumferential outer wall of the plurality of stirring rods (362) is provided with through holes.

6. The device for treating the desulfurization and denitrification of diketene cracking tail gas according to claim 5, characterized in that: The top of the transmission rod (360) is rotatably connected with a rotating gas injection seat (363), and the tail end of the gas delivery pump (131) is connected to the top of the rotating gas injection seat (363).

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