Recovery device for exhaust gas of nitrogen generator

Abstract

The application discloses a kind of recovery device for nitrogen generator exhaust gas, specifically relates to waste gas treatment technical field, including the pressure equalizing tank and separation tank of ground, and the lower part of pressure equalizing tank is connected with the exhaust pipe of nitrogen generator by air inlet pipe, the auxiliary assembly is fixedly installed in the inside of pressure equalizing tank, the volute passage is fixedly installed in one end of gas outlet pipe, the spray assembly is arranged in the inside of separation tank, and the liquid removal assembly is symmetrically arranged in the inside of separation tank.The pulse type high-pressure exhaust gas is converted into stable vortex flow by the cooperation of multilayer micropore plate and spiral guide vane, the impact on subsequent components caused by airflow fluctuation is avoided, the high-pressure low-speed exhaust gas is converted into low-pressure high-speed airflow by the gradual reduction of volute passage inner diameter, the exhaust gas flow rate is dispersed by filler layer, the alkali liquor sprayed by ring pipe nozzle is used, carbon dioxide is removed, the up-and-down reciprocating movement of the roller is used, the opening and closing of baffle are controlled, the intermittent discharge of reaction liquid is realized, and the influence of waste liquid accumulation on treatment efficiency is avoided.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a recovery device for waste gas emitted from a nitrogen generator. Background Technology

[0002] As a core device for obtaining nitrogen in the industrial field, nitrogen generators will emit exhaust gas during their operation. The exhaust gas contains incompletely removed moisture (gaseous), carbon dioxide, and a relatively large amount of oxygen. Direct emission of this exhaust gas would result in resource waste. It can be treated and reused, for example, in combustion aids and aeration systems for wastewater treatment.

[0003] Although the exhaust gas emitted by a nitrogen generator is relatively clean, it still needs to be treated before being released into the wastewater. For example, the exhaust gas emitted by a nitrogen generator is a pulsed high-pressure gas, which needs to be converted into a low-pressure, uniform airflow. At the same time, the carbon dioxide contained in the exhaust gas also needs to be removed before the exhaust gas can be released into the wastewater to avoid carbon dioxide affecting the pH value of the wastewater.

[0004] Chinese Patent Publication No. CN218740896U discloses a nitrogen generator exhaust gas recovery device, including a nitrogen generator body, a guide pipe, and a collection pipe. A control switch is installed on the surface of the nitrogen generator body, and a gas delivery pipe is installed on one side of the nitrogen generator body. A concentration meter is installed inside the gas delivery pipe, and the side of the gas delivery pipe away from the nitrogen generator body is connected to a treatment box. This patent, by controlling the control switch, allows exhaust gas to be discharged from the gas delivery pipe and enter the interior of the treatment box. The first filter, activated carbon adsorption layer, and second filter inside the treatment box can treat the injected exhaust gas, quickly removing any debris within the exhaust gas. This allows the nitrogen generator, when used in conjunction with the exhaust gas recovery device, to rapidly treat the exhaust gas and solves the problem of debris easily clogging the recovery pipe.

[0005] However, during operation, the above-mentioned device only uses activated carbon to adsorb and treat the waste gas. Since the waste gas is rich in oxygen, the device cannot effectively adsorb carbon dioxide in the waste gas, thus affecting the quality of waste gas recovery. This application uses a spray assembly to remove carbon dioxide contained in the waste gas. At the same time, it also uses a drive assembly and a liquid removal assembly to intermittently release the alkaline solution after the reaction, so as to avoid affecting the efficiency of subsequent waste gas treatment. Summary of the Invention

[0006] The main objective of this invention is to provide a recovery device for exhaust gas from a nitrogen generator, which can effectively solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A nitrogen generator exhaust gas recovery device includes a pressure equalization tank and a separation tank installed on the ground. The lower part of the pressure equalization tank is connected to the exhaust gas discharge pipe of the nitrogen generator through an air inlet pipe. An auxiliary component for stabilizing the exhaust gas flow rate and pressure is fixedly installed inside the pressure equalization tank. An air outlet pipe is fixedly installed at the upper end of the pressure equalization tank. A volute channel is fixedly installed at the end of the air outlet pipe away from the pressure equalization tank. A drive component is rotatably installed inside the separation tank. An early warning component for indicating the exhaust gas flow rate is provided below the drive component. A spray component for treating carbon dioxide in the exhaust gas is provided inside the separation tank above the drive component. A liquid removal component for intermittently releasing alkaline solution is symmetrically arranged inside the separation tank.

[0008] Preferably, the auxiliary component includes a multi-layer microporous plate fixedly installed on the lower side of the inner surface of the pressure equalization tank for dispersing airflow, and a spiral guide vane fixedly installed on the inner surface of the pressure equalization tank above the multi-layer microporous plate to guide the unstable pulse airflow into a stable vortex flow.

[0009] Preferably, a straight pipe is fixedly installed at the end of the volute channel away from the air outlet pipe, and the end of the straight pipe away from the volute channel penetrates the outer surface of the separator and extends into the interior of the separator.

[0010] Preferably, the drive assembly includes a rotating shaft rotatably mounted on the bottom wall of the inner surface of the separation tank, a radial turbine fixedly mounted on the middle of the outer surface of the rotating shaft, and a bidirectional lead screw fixedly mounted on the upper end of the rotating shaft.

[0011] Preferably, the drive assembly further includes a honeycomb layer fixedly installed on the lower side of the inner surface of the separation tank, and a conical membrane for guiding the flow of alkali solution fixedly installed on the inner surface of the separation tank above the honeycomb layer.

[0012] Preferably, the spray assembly includes a ring pipe fixedly installed on the upper part of the inner surface of the separator, and a plurality of nozzles fixedly installed on the lower part of the outer surface of the ring pipe. A packing layer for assisting in the separation of carbon dioxide in the exhaust gas is fixedly installed on the inner surface of the separator below the ring pipe. One side of the ring pipe penetrates the inner surface of the separator and extends to the outer surface of the separator. An alkaline solution source is fixedly installed at one end of the ring pipe on the outer surface of the separator.

[0013] Preferably, an output pipe is fixedly installed at the upper end of the separator, and the end of the output pipe away from the separator is connected to a gas collection tank in the prior art. An adsorption layer for treating alkaline solution carried in waste gas is fixedly installed on the upper part of the inner surface of the separator. Vertical grooves are symmetrically opened on the inner surface of the separator, and liquid outlets are symmetrically opened on the inner surface of the separator. Four guide rails are fixedly installed on the inner surface of the separator, and the two guide rails on the same side are adapted to the side of the liquid outlet near the inner surface of the separator.

[0014] Preferably, the liquid removal assembly includes a rotating ring disposed on the outer surface of the bidirectional lead screw, and rollers are symmetrically fixedly installed on the outer surface of the rotating ring, and the two rollers are slidably connected to the inner surface of the vertical groove on the same side.

[0015] Preferably, the liquid removal assembly further includes two L-shaped plates rotatably mounted on the inner surface of the separator. A second spring is fixedly mounted on the upper end of the horizontal portion of each of the two L-shaped plates, and the two second springs are respectively fixedly connected to the inner surface of the separator. A round roller is fixedly mounted on the end of the horizontal portion of each of the two L-shaped plates near the roller. A sliding roller is slidably mounted on the lower part of the side of each of the two L-shaped plates near the inner surface of the separator. A limit ring is slidably mounted on the outer surface of each of the two sliding rollers. A baffle is fixedly mounted on the lower end of each of the two limit rings, and the two baffles are respectively slidably connected to two guide rails on the same side.

[0016] Preferably, the warning component includes a support plate fixedly installed on the lower side of the outer surface of the rotating shaft. A first sensing block is symmetrically fixedly installed on one side of the upper end of the support plate, and a second sensing block is fixedly installed on the upper end of the support plate on the side of the two first sensing blocks away from the rotating shaft. The warning component also includes a fixing ring fixedly installed on the outer surface of the rotating shaft. A first spring is fixedly installed on one side of the outer surface of the fixing ring, and a centrifugal block is fixedly installed at the end of the first spring away from the fixing ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a combination of multi-layer microporous plates and spiral guide vanes to convert pulsed high-pressure exhaust gas into a stable vortex flow, avoiding airflow fluctuations from impacting subsequent components. At the same time, the multi-layer microporous plates can also intercept denser oil droplets and condensate droplets in the initial exhaust gas, reducing contamination of subsequent structures. Furthermore, by utilizing the gradually narrowing inner diameter of the volute channel, based on Bernoulli's principle, high-pressure low-speed exhaust gas is converted into low-pressure high-speed airflow, which in turn drives the rotating shaft and bidirectional lead screw to operate. This allows the intermittent operation of the liquid removal component to be achieved without additional power, saving energy.

[0018] 2. This invention disperses the gas flow rate of the waste gas through the packing layer, and, in conjunction with the alkaline solution sprayed by the ring nozzle, increases the gas-liquid contact area, allowing the waste gas to fully react with the alkaline solution and quickly remove carbon dioxide. At the same time, the bidirectional screw drives the roller to move up and down reciprocally, controlling the opening and closing of the baffle to achieve intermittent discharge of the reaction liquid, avoiding the accumulation of waste liquid and affecting the treatment efficiency.

[0019] 3. In addition, the present invention uses centrifugal blocks in conjunction with sensing blocks one and two to indirectly reflect the waste gas flow rate by real-time monitoring of the rotation speed of the centrifugal worm gear during the waste gas recovery process. When there is insufficient airflow (too low rotation speed) or channel blockage (too high rotation speed), the sensing blocks send a signal to the control terminal in a timely manner to avoid damage to the device or failure of the recovered gas to meet the standards. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the volute pipe of the present invention; Figure 5 This is a schematic diagram of the drive component structure of the present invention; Figure 6 This is a bottom view of the structure of the drive component of the present invention; Figure 7 This is a schematic diagram of the spray assembly structure of the present invention; Figure 8 This is a schematic diagram of the early warning component structure of the present invention; Figure 9 This is a schematic diagram of the liquid removal component structure of the present invention; Figure 10 This is a partial structural diagram of the liquid removal component of the present invention.

[0021] In the diagram: 1. Equalizing tank; 11. Inlet pipe; 12. Outlet pipe; 2. Volute channel; 21. Straight pipe; 3. Separator; 31. Vertical trough; 32. Output pipe; 33. Adsorption layer; 34. Guide rail; 35. Liquid outlet; 4. Early warning component; 41. Fixing ring; 42. Support plate; 43. Centrifuge block; 44. Spring 1; 45. Sensor block 1; 46. Sensor block 2; 5. Drive component; 51. 52. Centripetal turbine; 53. Rotating shaft; 54. Honeycomb layer; 55. Conical membrane; 6. Bidirectional lead screw; 7. Liquid removal assembly; 81. Rotating ring; 92. Pulley; 103. L-shaped plate; 11. Circular roller; 12. Spring II; 13. Limiting ring; 14. Baffle; 15. Auxiliary assembly; 16. Multi-layer microporous plate; 17. Spiral guide vane; 18. Spray assembly; 19. Packing layer; 10. Ring pipe; 11. Alkali source. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figure 1 and Figure 2As shown, a nitrogen generator exhaust gas recovery device includes a pressure equalization tank 1 and a separation tank 3 installed on the ground. The lower part of the pressure equalization tank 1 is connected to the exhaust gas discharge pipe of the nitrogen generator through an air inlet pipe 11. An auxiliary component 7 for stabilizing the exhaust gas flow rate and pressure is fixedly installed inside the pressure equalization tank 1. An air outlet pipe 12 is fixedly installed at the upper end of the pressure equalization tank 1. A volute channel 2 is fixedly installed at the end of the air outlet pipe 12 away from the pressure equalization tank 1. A drive component 5 is rotatably installed inside the separation tank 3. A warning component 4 for indicating the exhaust gas flow rate is provided below the drive component 5. A spray component 8 for treating carbon dioxide in the exhaust gas is provided inside the separation tank 3 above the drive component 5. A liquid removal component 6 for intermittently releasing alkaline solution is symmetrically arranged inside the separation tank 3.

[0024] When a nitrogen generator using pressure swing adsorption (PSA) emits exhaust gas, it typically uses a pulse-type exhaust gas emission method. The exhaust gas is rapidly released by the nitrogen generator, forming an instantaneous high-pressure airflow, which is then directed through the inlet pipe 11 to the lower side of the inner surface of the equalizing tank 1.

[0025] A conical guide block is provided in the middle of the bottom wall of the inner surface of the equalizing tank 1 to help the oil droplets and condensate droplets falling due to gravity to collect, and the collected mixed liquid can be cleaned periodically.

[0026] In some embodiments of the present invention, such as Figure 3 The auxiliary component 7 includes a multi-layer microporous plate 71 fixedly installed on the lower side of the inner surface of the equalizing tank 1 for dispersing airflow, and a spiral guide vane 72 fixedly installed on the inner surface of the equalizing tank 1 above the multi-layer microporous plate 71 to guide the unstable pulse airflow into a stable vortex flow.

[0027] Specifically, when the exhaust gas enters the lower part of the inner surface of the pressure equalization tank 1 through the inlet pipe 11, the exhaust gas rises vertically and passes through the multi-layer microporous plate 71 and the spiral guide plate 72 in sequence. The unstable exhaust gas flow is dispersed into small airflows through the multi-layer pores of the spiral guide plate 72. The pulse energy is consumed step by step by the multi-layer pores. This allows it to achieve pressure stabilization while producing only a very small total pressure drop loss. At the same time, it can also intercept the high-density oil droplets and condensate droplets entrained in the exhaust gas after impacting the multi-layer microporous plate 71, and fall onto the inner surface of the pressure equalization tank 1 by its own gravity. The exhaust gas, after being stabilized by the multi-layer microporous plate 71, rises and flows upward along the surface of the spiral guide plate 72, causing the exhaust gas to change from a vertically upward axial airflow to a vortex flow. After passing through the spiral guide plate 72, the exhaust gas enters the inner surface of the volute channel 2 through the exhaust pipe 12.

[0028] In some embodiments of the present invention, such as Figure 4 A straight pipe 21 is fixedly installed at the end of the volute channel 2 away from the outlet pipe 12, and the end of the straight pipe 21 away from the volute channel 2 penetrates the outer surface of the separator 3 and extends into the interior of the separator 3.

[0029] It should be noted that the inner diameter of the volute channel 2 gradually decreases from the end fixedly connected to the outlet pipe 12 to the end fixedly connected to the straight pipe 21. That is, the overall inner diameter of the volute channel 2 gradually decreases, while the inner diameter of the straight pipe 21 is the same as the inner diameter of the fixed connection between the straight pipe 21 and the volute channel 2.

[0030] Furthermore, by gradually narrowing the inner diameter, when the exhaust gas flows evenly through the inner surface of the volute channel 2, according to Bernoulli's principle, its pressure will drop sharply while its velocity will rise sharply. When the exhaust gas passes through the acceleration of the volute channel 2 and the flow path of the straight pipe 21, the high-pressure, low-speed exhaust gas is converted into a low-pressure, high-speed airflow.

[0031] In some embodiments of the present invention, such as Figure 5 The drive assembly 5 includes a rotating shaft 52 rotatably mounted on the bottom wall of the inner surface of the separator 3, a radial turbine 51 fixedly mounted on the middle of the outer surface of the rotating shaft 52, and a bidirectional lead screw 55 fixedly mounted on the upper end of the rotating shaft 52.

[0032] It should be noted that the straight pipe 21 extends to the outlet of the inner surface of the separator 3 at a compound angle. This compound angle refers to the simultaneous compounding of the tangential and radial directions with the outer surface of the radial turbine 51.

[0033] Specifically, high-speed exhaust gas is blown at a compound angle through straight pipe 21 onto the outer surface of radial turbine 51. As the exhaust gas is continuously blown, it cooperates with the blades on the outer surface of radial turbine 51 to drive radial turbine 51 to rotate after the exhaust gas is ejected. During the rotation of radial turbine 51, it will drive shaft 52 and double-acting screw 55 to rotate simultaneously.

[0034] In some embodiments of the present invention, such as Figure 5 and Figure 6 The drive assembly 5 also includes a honeycomb layer 53 fixedly installed on the lower side of the inner surface of the separation tank 3, and a conical membrane 54 for guiding the flow of alkaline solution fixedly installed on the inner surface of the separation tank 3 above the honeycomb layer 53.

[0035] It should be noted that the conical membrane 54 is made of polytetrafluoroethylene, which is commonly used in the prior art. During the process of recycling and treating waste gas, the waste gas can continue to rise through the conical membrane 54, while the reaction liquid after reacting with carbon dioxide in the waste gas and a small amount of unreacted alkali liquid are intercepted above the conical membrane 54. At the same time, the conical membrane 54 will not be corroded by the reaction liquid and alkali liquid.

[0036] Furthermore, the exhaust gas diffuses upward through the lower side of the outer surface of the centripetal turbine 51, and the upward airflow is evenly dispersed through the honeycomb layer 53. The dispersed exhaust gas then continues to rise through the conical membrane 54.

[0037] In some embodiments of the present invention, such as Figure 7The spray assembly 8 includes a ring pipe 82 fixedly installed on the upper part of the inner surface of the separator 3, and several nozzles fixedly installed on the lower part of the outer surface of the ring pipe 82. A packing layer 81 for assisting in the separation of carbon dioxide in the exhaust gas is fixedly installed on the inner surface of the separator 3 below the ring pipe 82. One side of the ring pipe 82 penetrates the inner surface of the separator 3 and extends to the outer surface of the separator 3. An alkaline source 83 is fixedly installed at one end of the ring pipe 82 on the outer surface of the separator 3.

[0038] It should be noted that the alkali source 83 contains alkali that reacts with carbon dioxide in the waste gas, and the alkali can be replenished intermittently during the waste gas recovery and treatment process.

[0039] In addition, the filler layer 81 is filled with plastic commonly used in the prior art, which can both disperse and reduce the flow rate of the exhaust gas, allowing the exhaust gas to fully contact the alkaline solution, and prevent it from being corroded by the alkaline solution.

[0040] Specifically, after the exhaust gas is evenly dispersed through the honeycomb layer 53, it flows upward. At this time, the alkaline solution inside the alkaline solution source 83 is sprayed downward through the ring pipe 82 and several nozzles, so that the alkaline solution and the exhaust gas react fully inside the packing layer 81 to remove carbon dioxide from the exhaust gas.

[0041] The alkaline solution that reacts with carbon dioxide in the exhaust gas gathers above the conical membrane 54 through the lower end of the packing layer 81. Guided by the conical membrane 54, the reaction liquid and a small amount of alkaline solution that has not yet reacted remain at the junction of the conical membrane 54 and the inner surface of the separator 3.

[0042] In some embodiments of the present invention, such as Figure 5 An output pipe 32 is fixedly installed on the upper end of the separator 3, and the end of the output pipe 32 away from the separator 3 is connected to the gas collection tank in the prior art. An adsorption layer 33 for treating alkaline solution carried in waste gas is fixedly installed on the upper part of the inner surface of the separator 3.

[0043] The aforementioned adsorption layer 33 is a commonly used wire mesh demister in the prior art, and the material of the wire mesh demister is plastic, which can intercept trace amounts of alkaline liquid carried in the exhaust gas and prevent the recovered exhaust gas from corroding the gas collection tank.

[0044] Specifically, after the waste gas reacts with the alkaline solution, it is adsorbed by the adsorption layer 33, and the remaining waste gas, which is a gas flow containing a large amount of oxygen, enters the gas collection tank commonly used in the prior art through the output pipe 32, waiting to be reused, for example, to be sent to the aeration system in sewage treatment.

[0045] In some embodiments of the present invention, such as Figure 8 and Figure 10Vertical grooves 31 are symmetrically opened on the inner surface of the separator 3, and liquid outlets 35 are symmetrically opened on the inner surface of the separator 3. Four guide rails 34 are fixedly installed on the inner surface of the separator 3, and the two guide rails 34 on the same side are adapted to the side of the liquid outlet 35 near the inner surface of the separator 3.

[0046] It should be noted that the two liquid outlets 35 mentioned above are located on one side of the outer surface of the separator 3, and each is equipped with a liquid collection box for collecting and storing the liquid after reacting with carbon dioxide in the exhaust gas.

[0047] In some embodiments of the present invention, such as Figure 9 The liquid removal assembly 6 includes a rotating ring 61 disposed on the outer surface of the bidirectional lead screw 55. The rotating ring 61 is symmetrically fixedly mounted with rollers 62 on its outer surface, and the two rollers 62 are slidably connected to the inner surface of the vertical groove 31 on the same side.

[0048] Furthermore, as the bidirectional lead screw 55 is continuously rotated by the rotating shaft 52 and the radial turbine 51, the rotating ring 61 and the two rollers 62 cooperate with the inner surface of the matching vertical groove 31. During the rotation of the bidirectional lead screw 55, the rotating ring 61 drives the inner surface of the matching vertical groove 31 of the two rollers 62 to move up and down repeatedly.

[0049] In some embodiments of the present invention, such as Figure 9 The liquid removal assembly 6 also includes two L-shaped plates 63 rotatably mounted on the inner surface of the separator 3. The upper ends of the horizontal portions of the two L-shaped plates 63 are each fixedly mounted with a second spring 65, and the two second springs 65 are respectively fixedly connected to the inner surface of the separator 3. The ends of the horizontal portions of the two L-shaped plates 63 near the push roller 62 are each fixedly mounted with a round roller 64. The lower parts of the sides of the two L-shaped plates 63 near the inner surface of the separator 3 are each slidably mounted with a sliding roller. The outer surfaces of the two sliding rollers are each slidably mounted with a limit ring 66. The lower ends of the two limit rings 66 are each fixedly mounted with a baffle 67. The two baffles 67 are respectively slidably connected to two guide rails 34 on the same side.

[0050] It should be noted that the outer surface of the above-mentioned spring 65 is coated with a coating to prevent alkaline corrosion. This coating is a commonly used material in the prior art and can prevent the spring 65 from being corroded during operation. At the same time, the lower end of the baffle 67 and the end of the baffle 67 near the conical membrane 54 are uniformly coated with a sealing coating. When the baffle 67 seals the liquid outlet 35, the reaction liquid above the conical membrane 54 and a small amount of unreacted alkaline liquid will not seep out from the gap.

[0051] Furthermore, as the rotating ring 61 drives the two rollers 62 to rise, it pushes the two matching round rollers 64 upward. As the two round rollers 64 are pushed upward, they drive the L-shaped plate 63 to rotate clockwise around its own turning point. At this time, the spring 65 on the same side is continuously squeezed by the rotating L-shaped plate 63. Furthermore, during the clockwise rotation of the L-shaped plate 63, the L-shaped plate 63 drives the sliding roller to slide downward along the inner surface of the limiting ring 66. When the push roller 62 continues to move upward until it disengages from the circular roller 64 on the same side, the compressed spring 65 pushes the L-shaped plate 63 to rotate counterclockwise during the process of returning to its original state. At the same time, the L-shaped plate 63 drives the sliding roller to slide along the inner surface of the limiting ring 66 to the top wall of the inner surface of the limiting ring 66.

[0052] Next, as Figure 10 As the rotating ring 61 drives the two rollers 62 to descend along the inner surface of the matching vertical groove 31, the rollers 62 push the circular roller 64 downward, which in turn causes the circular roller 64 to drive the L-shaped plate 63 to rotate counterclockwise around the turning point of the L-shaped plate 63. During the counterclockwise rotation of the L-shaped plate 63, the sliding roller and the inner surface of the limiting ring 66 cooperate to cause the limiting ring 66 to drive the baffle 67 to slide upward along the two guide rails 34 on the same side. During the upward sliding of the baffle 67, the liquid outlet 35 is gradually exposed, and the reaction liquid temporarily stored above the conical membrane 54 flows out through the liquid outlet 35 and is collected and stored by the liquid collection box in the prior art.

[0053] Similarly, when the L-shaped plate 63 rotates counterclockwise, the second spring 65 is continuously stretched.

[0054] Furthermore, the lowering roller 62 pushes the round roller 64 and L-shaped plate 63 to rotate counterclockwise. The roller 62 continues to descend along the inner surface of the vertical groove 31 on the same side until the outer surface of the roller 62 disengages from the round roller 64. At this time, the stretched spring 65 drives the L-shaped plate 63 and round roller 64 to rotate clockwise. Then, through the cooperation of the sliding roller and the limiting ring 66, the two guide rails 34 on the same side of the limiting ring 66 and the baffle 67 slide downward, sealing the liquid outlet 35 again.

[0055] In another embodiment of the present invention, such as Figure 8 The warning component 4 includes a support plate 42 fixedly installed on the lower side of the outer surface of the rotating shaft 52. A first sensing block 45 is symmetrically fixedly installed on one side of the upper end of the support plate 42, and a second sensing block 46 is fixedly installed on the upper end of the support plate 42 on the side of the two first sensing blocks 45 away from the rotating shaft 52.

[0056] Both of the aforementioned sensing blocks 45 and 46 are electrically connected to the control terminal in the prior art. Pressure sensors are provided on the side of each sensing block 45 and 46 that are close to each other. When they come into contact with and are squeezed by the centrifugal block 43, they will convert the pressure signal into an electrical signal and transmit it to the control terminal.

[0057] In another embodiment of the present invention, such as Figure 8The warning component 4 also includes a fixing ring 41 fixedly installed on the outer surface of the rotating shaft 52. A spring 44 is fixedly installed on one side of the outer surface of the fixing ring 41, and a centrifugal block 43 is fixedly installed on the end of the spring 44 away from the fixing ring 41.

[0058] Furthermore, as the rotating shaft 52 is continuously rotated by the exhaust gas output from the centripetal turbine 51 and the straight pipe 21, the rotating shaft 52 drives the fixed ring 41 and the support plate 42 to rotate simultaneously. In addition, through the cooperation of the spring 44 with the centrifugal block 43, during the rotation, the centrifugal force on the centrifugal block 43 is balanced with the tension of the spring 44 on the centrifugal block 43, so that the centrifugal block 43 is between the sensing block 46 and the two sensing blocks 45.

[0059] When the exhaust gas system of the nitrogen generator leaks or other situations cause insufficient airflow output from the straight pipe 21, the speed of the centrifugal turbine 51 decreases, so that the centrifugal force on the centrifugal block 43 is less than the tension of the spring-44 on the centrifugal block 43. As a result, the centrifugal block 43 moves closer to the two sensing blocks-45. Then, the two sensing blocks-45 are squeezed by the centrifugal block 43. At this time, the two sensing blocks-45 send a signal to the control terminal, and a "speed too low" warning appears, which promptly reminds the operator to check the exhaust gas system of the nitrogen generator. When the blockage inside the volute channel 2 causes the airflow velocity through the volute channel 2 to be greater, the centrifugal turbine 51 rotates faster, which in turn makes the centrifugal force on the centrifugal block 43 greater than the tension of the spring 44 on the centrifugal block 43. Then, the sensor block 45 contacts and squeezes the sensor block 46, and the sensor block 46 sends a signal to the control terminal, which will show an "overspeed warning" to remind the operator to check the recycling and processing device of the present invention.

[0060] In addition, it should be noted that the joints of all the above structures are made of self-lubricating materials (such as PTFE coating) to avoid sparks generated by friction during movement.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A device for recovering exhaust gas from a nitrogen generator, comprising a pressure equalization tank (1) and a separation tank (3) installed on the ground, wherein the lower part of the pressure equalization tank (1) is connected to the exhaust gas discharge pipe of the nitrogen generator via an air inlet pipe (11), characterized in that: The equalizing tank (1) is fixedly equipped with an auxiliary component (7) to stabilize the waste gas flow rate and pressure. The equalizing tank (1) is fixedly equipped with an outlet pipe (12) at the upper end. The outlet pipe (12) is fixedly equipped with a volute channel (2) at the end away from the equalizing tank (1). The separation tank (3) is rotatably equipped with a drive component (5). The drive component (5) is equipped with an early warning component (4) to warn of the waste gas flow rate at the lower side. The separation tank (3) is equipped with a spray component (8) to treat carbon dioxide in the waste gas located above the drive component (5). The separation tank (3) is symmetrically equipped with a liquid removal component (6) to intermittently release alkaline solution.

2. The nitrogen generator exhaust gas recovery device according to claim 1, characterized in that: The auxiliary component (7) includes a multi-layer microporous plate (71) fixedly installed on the lower side of the inner surface of the equalizing tank (1) for dispersing airflow, and a spiral guide vane (72) fixedly installed on the inner surface of the equalizing tank (1) above the multi-layer microporous plate (71) to guide the unstable pulse airflow into a stable vortex flow.

3. The nitrogen generator exhaust gas recovery device according to claim 1, characterized in that: A straight pipe (21) is fixedly installed at one end of the volute channel (2) away from the air outlet pipe (12), and the end of the straight pipe (21) away from the volute channel (2) penetrates the outer surface of the separator (3) and extends into the interior of the separator (3).

4. The nitrogen generator exhaust gas recovery device according to claim 3, characterized in that: The drive assembly (5) includes a rotating shaft (52) rotatably mounted on the bottom wall of the inner surface of the separator (3), a radial turbine (51) fixedly mounted on the middle of the outer surface of the rotating shaft (52), and a bidirectional lead screw (55) fixedly mounted on the upper end of the rotating shaft (52).

5. A nitrogen generator exhaust gas recovery device according to claim 4, characterized in that: The drive assembly (5) also includes a honeycomb layer (53) fixedly installed on the lower side of the inner surface of the separation tank (3), and a conical membrane (54) for guiding the flow of alkaline solution is fixedly installed on the inner surface of the separation tank (3) above the honeycomb layer (53).

6. The nitrogen generator exhaust gas recovery device according to claim 1, characterized in that: The spray assembly (8) includes an annular pipe (82) fixedly installed on the upper part of the inner surface of the separator (3), and several nozzles are fixedly installed on the lower part of the outer surface of the annular pipe (82). A packing layer (81) for assisting in the separation of carbon dioxide in the exhaust gas is fixedly installed on the inner surface of the separator (3) below the annular pipe (82). One side of the annular pipe (82) penetrates the inner surface of the separator (3) and extends to the outer surface of the separator (3). An alkaline source (83) is fixedly installed at one end of the annular pipe (82) on the outer surface of the separator (3).

7. A nitrogen generator exhaust gas recovery device according to claim 1, characterized in that: The upper end of the separator (3) is fixedly installed with an output pipe (32), and the end of the output pipe (32) away from the separator (3) is connected to the gas collection tank in the prior art. An adsorption layer (33) for treating alkaline liquid carried in waste gas is fixedly installed on the upper part of the inner surface of the separator (3). Vertical grooves (31) are symmetrically opened on the inner surface of the separator (3). Liquid outlets (35) are symmetrically opened on the inner surface of the separator (3). Four guide rails (34) are fixedly installed on the inner surface of the separator (3). The two guide rails (34) on the same side are matched with the liquid outlets (35) on the side close to the inner surface of the separator (3).

8. A nitrogen generator exhaust gas recovery device according to claim 7, characterized in that: The liquid removal assembly (6) includes a rotating ring (61) disposed on the outer surface of the bidirectional lead screw (55). The rotating ring (61) is symmetrically fixedly mounted with rollers (62), and the two rollers (62) are slidably connected to the inner surface of the vertical groove (31) on the same side.

9. A nitrogen generator exhaust gas recovery device according to claim 8, characterized in that: The liquid removal assembly (6) also includes two L-shaped plates (63) rotatably mounted on the inner surface of the separator (3). The upper ends of the horizontal portions of the two L-shaped plates (63) are fixedly mounted with springs (65), and the two springs (65) are fixedly connected to the inner surface of the separator (3). The ends of the horizontal portions of the two L-shaped plates (63) near the push roller (62) are fixedly mounted with round rollers (64). The lower portions of the two L-shaped plates (63) near the inner surface of the separator (3) are slidably mounted with sliding rollers. The outer surfaces of the two sliding rollers are slidably mounted with limit rings (66). The lower ends of the two limit rings (66) are fixedly mounted with baffles (67). The two baffles (67) are slidably connected to the two guide rails (34) on the same side.

10. A nitrogen generator exhaust gas recovery device according to claim 4, characterized in that: The warning component (4) includes a support plate (42) fixedly installed on the lower side of the outer surface of the rotating shaft (52). A first sensing block (45) is symmetrically fixedly installed on one side of the upper end of the support plate (42). A second sensing block (46) is fixedly installed on the upper end of the support plate (42) on the side of the two first sensing blocks (45) away from the rotating shaft (52). The warning component (4) also includes a fixing ring (41) fixedly installed on the outer surface of the rotating shaft (52). A first spring (44) is fixedly installed on one side of the outer surface of the fixing ring (41). A centrifugal block (43) is fixedly installed at the end of the first spring (44) away from the fixing ring (41).

Images