Tail gas dilute acid absorption kettle

Abstract

The utility model discloses a tail gas dilute acid absorption kettle, including kettle body and spray mechanism, spray mechanism: it includes delivery pipeline, flow guide pipe, liquid discharge hopper, blocking board, liquid outlet hole and drive assembly, the through -hole of lower surface right side of kettle body is equipped with delivery pipeline, and the liquid outlet of delivery pipeline is through the upper surface of kettle body, and the inside of kettle body is equipped with the baffle, and the rotary hole of the upper surface of baffle is rotatably connected with flow guide pipe through drive assembly, and the lower part between the upper end of flow guide pipe and the liquid outlet of delivery pipeline is rotatably connected, and the liquid discharge hopper is established to the liquid outlet of flow guide pipe, and the inside of liquid discharge hopper is equipped with the blocking board, and this tail gas dilute acid absorption kettle, in the natural upfloating process of tail gas, the dilute acid below is sprayed from the top of kettle body in the form of small droplets or water column through spray mechanism, improves the contact time and area of gas liquid, and the absorption efficiency of alkaline gas is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, specifically to an exhaust gas dilute acid absorption vessel. Background Technology

[0002] During the production of chemical products, exhaust gas is generated. This exhaust gas is mostly an air pollutant. If it is emitted directly without treatment, it will pollute the air. The exhaust gas contains a variety of components. If it is necessary to treat the alkaline gas in the exhaust gas during the exhaust gas treatment process, then a dilute acid absorption vessel for exhaust gas is required.

[0003] When using the existing tail gas dilute acid absorption vessel, the operator usually introduces tail gas containing alkaline gas into the vessel containing dilute acid. The outlet end of the gas inlet pipe usually extends into the interior of the dilute acid. After the tail gas enters the vessel, it floats up. During the floating process, the alkaline gas reacts with the dilute acid and is absorbed.

[0004] Existing tail gas dilute acid absorption reactors have the following problems: they only absorb the alkaline gases inside by the natural floating of the tail gas, which takes a long time and has low absorption efficiency. To address this, we propose a tail gas dilute acid absorption reactor. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a tail gas dilute acid absorption vessel. During the natural floating process of the tail gas, the dilute acid below is sprayed out from the top of the vessel body in the form of small droplets or water columns through a spraying mechanism, which improves the gas-liquid contact time and area, accelerates the absorption efficiency of alkaline gas, and can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tail gas dilute acid absorption vessel, comprising a vessel body and a spraying mechanism;

[0007] The spraying mechanism includes a conveying pipe, a guide pipe, a drain hopper, a baffle plate, a drain hole, and a drive assembly. The conveying pipe is installed in a through hole on the right side of the lower surface of the vessel body. The drain end of the conveying pipe penetrates the upper surface of the vessel body. An isolation plate is installed inside the vessel body. A guide pipe is rotatably connected to a rotating hole on the upper surface of the isolation plate through the drive assembly. The upper end of the guide pipe is rotatably connected to the lower part of the drain end of the conveying pipe. A drain hopper is installed at the drain outlet of the guide pipe. A baffle plate is installed inside the drain hopper. The lower surface of the baffle plate has evenly distributed drain holes. During the natural rise of the exhaust gas, the spraying mechanism sprays the dilute acid below from the top of the vessel body in the form of small droplets or water columns, which improves the gas-liquid contact time and area and accelerates the absorption efficiency of alkaline gas.

[0008] Furthermore, it also includes a microcontroller, which is located outside the vessel body. The input terminal of the microcontroller is electrically connected to an external power supply to facilitate the normal operation of the equipment.

[0009] Furthermore, the spraying mechanism also includes a pump, which is connected in series in the middle of the conveying pipeline. The input end of the pump is electrically connected to the output end of the microcontroller, so as to facilitate pumping the dilute acid from below to above.

[0010] Furthermore, the drive assembly includes a rotating shaft, gear one, and gear two. Gear one is rotatably connected to the upper surface of the isolation plate via the rotating shaft. Gear two is fixedly sleeved on the upper end of the outer surface of the guide tube. Gear one and gear two are meshed and connected. A sealed bearing is fixedly sleeved on the outer surface of the guide tube. The outer ring of the sealed bearing is fixedly connected to the inner wall of the rotating hole of the isolation plate, which facilitates the normal operation of the driving spray mechanism.

[0011] Furthermore, a motor is provided on the upper surface of the vessel body. The lower end of the output shaft of the motor is fixedly connected to the upper end of the rotating shaft, and the input end of the motor is electrically connected to the output end of the microcontroller to provide driving force.

[0012] Furthermore, the bottom wall of the vessel is rotatably connected to a stirring blade via a stirring rod, and a second motor is provided on the lower surface of the vessel. The upper end of the output shaft of the second motor is fixedly connected to the lower end of the stirring rod, and the input end of the second motor is electrically connected to the output end of a microcontroller, which facilitates stirring of dilute acid to make the gas-liquid contact more uniform.

[0013] Furthermore, an air inlet pipe and an exhaust pipe are respectively installed in the mounting holes on the left and right sides of the upper surface of the vessel. A gas concentration sensor is installed on the side wall of the vessel. The detection end of the gas concentration sensor passes through the side wall of the vessel and is located in the absorption cavity below the isolation plate. The output end of the gas concentration sensor is electrically connected to the input end of the microcontroller to facilitate the detection of the concentration of alkaline gas in the exhaust gas.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This tail gas dilute acid absorption kettle has the following advantages:

[0015] During the natural ascent of the exhaust gas, the pump pumps the dilute acid below to the top of the vessel through the delivery pipe. The dilute acid enters the guide pipe through the delivery pipe and is sprayed out through the liquid outlet hole on the baffle plate in the discharge hopper. The rotation of the guide pipe causes the dilute acid to be subjected to centrifugal force and inertial force when it is sprayed out, and it is sprayed out in the form of small droplets or water columns. The sprayed dilute acid reacts with the rising exhaust gas and absorbs the alkaline gas, which increases the gas-liquid contact time and area and accelerates the absorption efficiency of alkaline gas. Attached Figure Description

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

[0017] Figure 2This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is an enlarged structural schematic diagram of section B of this utility model;

[0019] Figure 4 This is an enlarged structural schematic diagram of point A of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the guide tube of this utility model.

[0021] In the diagram: 1. Reactor body, 2. Microcontroller, 3. Spraying mechanism, 31. Conveying pipe, 32. Guide pipe, 33. Pump, 34. Drainage hopper, 35. Baffle plate, 36. Liquid outlet, 37. Drive assembly, 371. Rotary shaft, 372. Gear 1, 373. Gear 2, 4. Motor 1, 5. Motor 2, 6. Stirring rod, 7. Stirring blade, 8. Inlet pipe, 9. Exhaust pipe, 10. Gas concentration sensor, 11. Isolation plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5This embodiment provides a technical solution: a tail gas dilute acid absorption vessel, including a vessel body 1 and a spraying mechanism 3, and also including a microcontroller 2. The microcontroller 2 is disposed outside the vessel body 1, and its input terminal is electrically connected to an external power source. The bottom wall of the vessel body 1 is rotatably connected to a stirring blade 7 via a stirring rod 6. A second motor 5 is provided on the lower surface of the vessel body 1. The upper end of the output shaft of the second motor 5 is fixedly connected to the lower end of the stirring rod 6, and the input terminal of the second motor 5 is electrically connected to the output terminal of the microcontroller 2. An air inlet pipe 8 and an exhaust pipe 9 are respectively provided in the mounting holes on the left and right sides of the upper surface of the vessel body 1. (The upper end of the air inlet pipe 8 is connected in series with...) A one-way check valve automatically closes when dilute acid flows back. A gas concentration sensor 10 is installed on the side wall of the vessel body 1. The gas concentration sensor 10 consists of a sensitive element (electrochemical sensitive element, which generates current through the oxidation-reduction reaction of gas on the electrode, the magnitude of which is proportional to the gas concentration), a signal processing circuit (which converts the electrical signal generated by the sensitive element (such as weak current or resistance change) into a measurable voltage signal), and a microcontroller (which calculates the gas concentration based on calibration parameters and algorithms). The gas concentration sensor 10 transmits the detected alkaline gas concentration to the microcontroller. (Machine 2), the detection end of the gas concentration sensor 10 passes through the side wall of the vessel 1 and is located in the absorption chamber below the isolation plate (11). The output end of the gas concentration sensor 10 is electrically connected to the input end of the microcontroller 2. The operator opens the liquid inlet valve on the upper side of the outer surface of the vessel 1 and adds dilute acid into the vessel 1. Then, the exhaust gas is introduced into the vessel 1 through the gas inlet pipe 8. During the natural floating process of the exhaust gas, the alkaline gas in the exhaust gas comes into contact with the dilute acid and reacts. The microcontroller 2 is operated to turn on the motor 2 5. The output shaft of the motor 2 5 drives the stirring rod 6 to rotate, causing the stirring blade 7 to rotate around the stirring rod 6 to stir the dilute acid. Stirring makes the gas-liquid contact more uniform. The oxidation-reduction reaction of alkaline gas on the electrodes of the sensitive unit of the gas concentration sensor 10 generates current. After the current is processed by the signal processing circuit of the gas concentration sensor 10, the microcontroller of the gas concentration sensor 10 calculates the gas concentration according to the calibration parameters and algorithm. Finally, the calculated gas concentration is transmitted to the microcontroller 2. When the alkaline gas concentration displayed on the display screen of the microcontroller 2 meets the standard, the valve on the exhaust pipe 9 can be opened to discharge the gas from the vessel 1. Then the drain valve on the lower side of the vessel 1 can be opened to discharge the dilute acid from the vessel 1.

[0024] Spraying mechanism 3: It includes a conveying pipe 31, a guide pipe 32, a discharge hopper 34, a baffle plate 35, a discharge hole 36, and a drive assembly 37. The conveying pipe 31 is installed in a through hole on the right side of the lower surface of the vessel body 1. The discharge end of the conveying pipe 31 penetrates the upper surface of the vessel body 1. An isolation plate 11 is installed inside the vessel body 1. The guide pipe 32 is rotatably connected to the rotating hole on the upper surface of the isolation plate 11 through the drive assembly 37. (The upper end of the guide pipe 32 is a vertical inlet pipe, and the lower end is four outlet pipes distributed at equal angles.) The upper end of the guide pipe 32 is rotatably connected to the lower part of the discharge end of the conveying pipe 31. Each outlet is equipped with a drain hopper 34, and each drain hopper 34 has a baffle plate 35 inside. The lower surface of each baffle plate 35 has evenly distributed outlet holes 36. The spraying mechanism 3 also includes a pump 33. The pump 33 is connected in series in the middle of the conveying pipe 31. The input end of the pump 33 is electrically connected to the output end of the microcontroller 2. The drive assembly 37 includes a rotating shaft 371, a first gear 372, and a second gear 373. The upper surface of the isolation plate 11 is rotatably connected to the first gear 372 through the rotating shaft 371. The upper end of the outer surface of the guide pipe 32 is fixedly fitted with the second gear 373. The first gear 372 and the second gear 373 are meshed and connected. A sealed bearing is fixedly fitted on the outer surface of the vessel body 2. The outer ring of the sealed bearing is fixedly connected to the inner wall of the rotating hole of the isolation plate 11. A motor 4 is installed on the upper surface of the vessel body 1. The lower end of the output shaft of the motor 4 is fixedly connected to the upper end of the rotating shaft 371. The input end of the motor 4 is electrically connected to the output end of the microcontroller 2. At the same time, the pump 33 and the motor 4 work under the control of the microcontroller 2. The pump 33 pumps the dilute acid below the vessel body 1 to the top of the vessel body 1 through the conveying pipe 31. The dilute acid enters the guide pipe 32 through the conveying pipe 31, and then the dilute acid is sprayed out from the top of the vessel body 1 through the discharge bucket 34. The dilute acid is blocked by the outlet on the baffle plate 35. The liquid outlet 36 separates the sprayed dilute acid, which reacts with the rising exhaust gas to absorb the alkaline gas. At this time, the output shaft of motor 4 drives gear 372 to rotate through shaft 371. Gear 372 drives guide tube 32 to rotate through meshing gear 373. The rotation of guide tube 32 causes the dilute acid to be subjected to centrifugal force and inertial force when it is sprayed out. With the cooperation of the liquid outlet 36, it is sprayed out in the form of small droplets or water column. High frequency rotation combined with high speed water flow easily produces fine droplets. Low frequency rotation combined with low speed water flow may form intermittent water column or larger water droplets. The presence of the isolation plate 11 prevents the gear transmission from being affected.

[0025] The working principle of the tail gas dilute acid absorption vessel provided by this utility model is as follows: The operator opens the liquid inlet valve on the upper side of the outer surface of the vessel body 1, adds dilute acid into the vessel body 1, and then introduces the tail gas into the vessel body 1 through the gas inlet pipe 8. During the natural floating process of the tail gas, the alkaline gas in the tail gas comes into contact with the dilute acid and reacts. The microcontroller 2 is controlled to turn on the second motor 5. The output shaft of the second motor 5 drives the stirring rod 6 to rotate, causing the stirring blade 7 to rotate around the stirring rod 6 to stir the dilute acid, making the gas-liquid contact more uniform. Meanwhile, under the control of the microcontroller 2, the pump 33 and motor 4 operate. The pump 33 pumps the dilute acid from below the vessel 1 to above the vessel 1 through the delivery pipe 31. The dilute acid enters the guide pipe 32 through the delivery pipe 31, and then sprays out from above the vessel 1 through the discharge hopper 34. The dilute acid is separated by the outlet hole 36 on the baffle plate 35. The sprayed dilute acid reacts with the rising tail gas and absorbs the alkaline gas. At this time, the output shaft of motor 4 drives gear 37 through the rotating shaft 371. 2. The gear 1 372 drives the guide tube 32 to rotate through the meshing gear 2 373. The rotation of the guide tube 32 causes the dilute acid to be sprayed out under the action of centrifugal force and inertial force. Under the action of the liquid outlet 36, it is sprayed out in the form of small droplets or water column. High frequency rotation combined with high speed water flow easily produces fine droplets, while low frequency rotation combined with low speed water flow may form intermittent water column or larger water droplets. Due to the presence of the isolation plate 11, the gear transmission is not affected. The oxidation-reduction reaction of alkaline gas on the electrode of the sensitive unit of the gas concentration sensor 10 generates current. After the current is processed by the signal processing circuit of the gas concentration sensor 10, the microcontroller of the gas concentration sensor 10 calculates the gas concentration according to the calibration parameters and algorithm. Finally, the calculated gas concentration is transmitted to the microcontroller 2. When the alkaline gas concentration displayed on the display screen of the microcontroller 2 meets the standard, the valve on the exhaust pipe 9 can be opened to discharge the gas from the vessel 1. Then the drain valve on the lower side of the vessel 1 can be opened to discharge the dilute acid from the vessel 1.

[0026] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be an STM32F1, the pump 33 can be an IRG type, the motor 4 and motor 5 can be YP-100 series, and the gas concentration sensor 10 can be a 7CVLAN / CO-10. The microcontroller 2 controls the operation of the pump 33, motor 4, motor 5 and gas concentration sensor 10 using methods commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tail gas dilute acid absorption vessel, characterized in that: It includes a vessel body (1) and a spraying mechanism (3); Spraying mechanism (3): It includes a conveying pipe (31), a guide pipe (32), a drain hopper (34), a baffle plate (35), a drain hole (36), and a drive assembly (37). The conveying pipe (31) is provided in the through hole on the right side of the lower surface of the vessel body (1). The drain end of the conveying pipe (31) penetrates the upper surface of the vessel body (1). The vessel body (1) is provided with an isolation plate (11). The guide pipe (32) is rotatably connected to the rotating hole on the upper surface of the isolation plate (11) through the drive assembly (37). The upper end of the guide pipe (32) is rotatably connected to the lower part of the drain end of the conveying pipe (31). A drain hopper (34) is provided at the drain outlet of the guide pipe (32). A baffle plate (35) is provided inside the drain hopper (34). A uniformly distributed drain hole (36) is provided on the lower surface of the baffle plate (35).

2. The tail gas dilute acid absorption vessel according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the vessel body (1) and the input terminal of the microcontroller (2) is electrically connected to an external power source.

3. The tail gas dilute acid absorption vessel according to claim 2, characterized in that: The spraying mechanism (3) also includes a pump (33), which is connected in series in the middle of the conveying pipe (31). The input end of the pump (33) is electrically connected to the output end of the microcontroller (2).

4. The tail gas dilute acid absorption vessel according to claim 2, characterized in that: The drive assembly (37) includes a rotating shaft (371), a first gear (372), and a second gear (373). The upper surface of the isolation plate (11) is rotatably connected to the first gear (372) via the rotating shaft (371). The upper end of the outer surface of the guide tube (32) is fixedly fitted with the second gear (373). The first gear (372) and the second gear (373) are meshed and connected. The outer surface of the guide tube (32) is fixedly fitted with a sealed bearing. The outer ring of the sealed bearing is fixedly connected to the inner wall of the rotating hole of the isolation plate (11).

5. The tail gas dilute acid absorption vessel according to claim 4, characterized in that: The upper surface of the vessel body (1) is provided with a motor (4), the lower end of the output shaft of the motor (4) is fixedly connected to the upper end of the rotating shaft (371), and the input end of the motor (4) is electrically connected to the output end of the microcontroller (2).

6. The tail gas dilute acid absorption vessel according to claim 2, characterized in that: The bottom wall of the vessel body (1) is rotatably connected to the stirring blade (7) via the stirring rod (6). The lower surface of the vessel body (1) is provided with a second motor (5). The upper end of the output shaft of the second motor (5) is fixedly connected to the lower end of the stirring rod (6). The input end of the second motor (5) is electrically connected to the output end of the microcontroller (2).

7. The tail gas dilute acid absorption vessel according to claim 2, characterized in that: The upper surface of the vessel body (1) has mounting holes on the left and right sides respectively equipped with an air inlet pipe (8) and an exhaust pipe (9). The side wall of the vessel body (1) is equipped with a gas concentration sensor (10). The detection end of the gas concentration sensor (10) passes through the side wall of the vessel body (1) and is located in the absorption cavity below the isolation plate (11). The output end of the gas concentration sensor (10) is electrically connected to the input end of the microcontroller (2).

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