Acid gas washing tower for secondary alkali washing

Abstract

The utility model provides an acid gas washing tower for secondary alkali washing, which relates to the technical field of waste gas treatment equipment, and comprises a washing tower, a first spraying frame and a second spraying frame are arranged in the washing tower, the second spraying frame is arranged above the first spraying frame, the side surface of the washing tower is connected with a gas inlet pipe, and the gas inlet pipe is connected with a gas outlet pipe. A liquid discharge pipe is connected to the bottom of the washing tower, and a treatment box is mounted at the bottom of the liquid discharge pipe. Particles in waste liquid are effectively filtered through the filter element, then the PH metering machine detects the filtered waste liquid, neutralizer can be added into the waste liquid through the feeding pipe according to the detection result, meanwhile, the transmission shaft is electrically driven by the stirring motor to rotate, the transmission shaft drives the stirring rod to rotate, and therefore the waste liquid can be fully stirred. After the waste liquid and the neutralizer are mixed and stirred, the valve is opened to discharge the treated waste liquid, so that the value in the waste liquid is ensured to meet the discharge standard, the pollution to the environment is avoided, and the safety of the surrounding ecological environment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment, in particular to an acid gas scrubbing tower for secondary alkali washing. Background Art

[0002] Acid waste gas can be treated by a scrubbing tower. The scrubbing tower is a new type of gas purification and treatment equipment, which is improved on the basis of a packed bed gas purifier and is widely used in the treatment of industrial waste gas purification, dust removal, etc. When the mixed gas is introduced into the scrubbing tower from the bottom, the liquid passes through each layer of the tower plate from top to bottom under the action of gravity through the spray head and is discharged from the bottom of the tower. The gas is pushed by the air pressure and passes through each layer of the tower plate from bottom to top through the tower plate and is discharged from the top of the tower. The spray liquid and the gas flow reversely and contact evenly in a cross-flow manner, so that the harmful particles in the waste gas are captured during the contact process of the gas-liquid two phases and thus settle.

[0003] During the use of the existing scrubbing tower, a large amount of waste liquid will be generated. The waste liquid contains acidic or alkaline substances. If the waste liquid is directly discharged into the environment without treatment, it is easy to pollute the environment, thus causing serious environmental pollution problems. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem that in the prior art, a large amount of waste liquid is generated during the use of the scrubbing tower. The waste liquid contains acidic or alkaline substances. If the waste liquid is directly discharged into the environment without treatment, it is easy to pollute the environment, thus causing serious environmental pollution problems, and to propose an acid gas scrubbing tower for secondary alkali washing.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: an acid gas scrubbing tower for secondary alkali washing, including a scrubbing tower. A first spray rack and a second spray rack are installed inside the scrubbing tower. The second spray rack is arranged above the first spray rack. An air inlet pipe is connected to the side of the scrubbing tower. A drain pipe is connected to the bottom of the scrubbing tower. A treatment tank is installed at the bottom of the drain pipe. A filter element is installed at the top of the treatment tank. A PH meter is installed through the side of the treatment tank. A stirring motor is installed at the bottom of the treatment tank. A transmission shaft is connected to the top of the stirring motor. A plurality of stirring rods are distributed on the outer side of the transmission shaft. A feed pipe is connected to the side of the treatment tank.

[0006] Preferably, an exhaust port is opened at the top of the scrubbing tower. An installation ring is installed outside the exhaust port. A plurality of hydraulic telescopic rods are installed at the top of the installation ring. A protective cover is installed at the top of the hydraulic telescopic rods.

[0007] Preferably, a packing layer is installed inside the scrubbing tower. The packing layer is arranged between the second spray rack and the first spray rack. An eliminator is installed inside the scrubbing tower, and the eliminator is arranged above the second spray rack.

[0008] Preferably, a second connecting pipe is connected to the side of the first spray rack, and a first connecting pipe is connected to the side of the second spray rack. One end of the first connecting pipe is connected to a pump, one end of the second connecting pipe is connected to the pump, and a storage tank is installed at the bottom of the pump.

[0009] Preferably, a discharge pipe is connected to the side of the treatment tank, and a valve is arranged in the middle of the discharge pipe.

[0010] Preferably, a support frame is installed outside the scrubbing tower, and the side of the storage tank is connected to the outside of the support frame.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows.

[0012] 1. In the present utility model, the filter element effectively filters out the particulate matter in the waste liquid, and then the pH meter measures the filtered waste liquid, which facilitates the detection of the pH value in the waste liquid. According to the detection result, it is beneficial to add a neutralizing agent to the waste liquid through the feed pipe. At the same time, the stirring motor drives the transmission shaft to rotate electrically, and the transmission shaft drives the stirring rod to rotate, which is beneficial to mix and stir the waste liquid and the neutralizing agent. Finally, the valve is opened to discharge the treated waste liquid through the discharge pipe, ensuring that the values in the waste liquid meet the discharge standards, avoiding environmental pollution, ensuring the safety of the surrounding ecological environment, protecting the environment, and conforming to sustainable development.

[0013] 2. In the present utility model, when the scrubbing tower is not in use, the hydraulic telescopic rod descends, which is beneficial to drive the protective cover to descend, so that the protective cover seals the exhaust port, avoiding birds and the like from entering the exhaust port, ensuring the smoothness of the exhaust port, and then ensuring the normal operation of the scrubbing tower. At the same time, it reduces the equipment failures caused by birds, reduces the maintenance cost, and improves the stability and reliability of the scrubbing tower operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram of an acid gas scrubbing tower for secondary caustic washing proposed by the present utility model;

[0015] Figure 2 is another angle structural schematic diagram of an acid gas scrubbing tower for secondary caustic washing proposed by the present utility model;

[0016] Figure 3 is a structural schematic diagram of waste liquid treatment and decomposition of an acid gas scrubbing tower for secondary caustic washing proposed by the present utility model;

[0017] Figure 4 The present utility model provides a schematic internal sectional view of an acid gas scrubbing tower for secondary caustic washing;

[0018] Figure 5 The present utility model provides a schematic partial sectional view of an acid gas scrubbing tower for secondary caustic washing.

[0019] Legend: 1. Scrubbing tower; 2. Inlet pipe; 3. Drain pipe; 4. Treatment tank; 5. Filter element; 6. Discharge pipe; 7. Stirring motor; 8. Stirring rod; 9. PH meter; 10. Feed pipe; 11. Support frame; 12. Exhaust port; 13. Installation ring; 14. Hydraulic telescopic rod; 15. Protective cover; 16. First spray rack; 17. Packing layer; 18. Second spray rack; 19. Demister; 20. First connecting pipe; 21. Second connecting pipe; 22. Pump; 23. Storage tank. Detailed implementation manners

[0020] In order to more clearly understand the above objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0021] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0022] Embodiment 1

[0023] As Figures 1-5 shown, the present utility model provides a technical solution: an acid gas scrubbing tower for secondary caustic washing, including a scrubbing tower 1. Inside the scrubbing tower 1, a first spray rack 16 and a second spray rack 18 are installed. The second spray rack 18 is arranged above the first spray rack 16. An inlet pipe 2 is connected to the side of the scrubbing tower 1, a drain pipe 3 is connected to the bottom of the scrubbing tower 1, a treatment tank 4 is installed at the bottom of the drain pipe 3, a filter element 5 is installed at the top of the treatment tank 4, a PH meter 9 is installed through the side of the treatment tank 4, a stirring motor 7 is installed at the bottom of the treatment tank 4, a transmission shaft is connected to the top of the stirring motor 7, and a plurality of stirring rods 8 are distributed on the outer side of the transmission shaft. A feed pipe 10 is connected to the side of the treatment tank 4, a discharge pipe 6 is connected to the side of the treatment tank 4, and a valve is arranged in the middle of the discharge pipe 6.

[0024] In this embodiment, the intake pipe 2 facilitates the entry of acid gas into the interior of the scrubbing tower 1, and the drain pipe 3 facilitates the discharge of waste liquid during the treatment of acid gas. The filter element 5 effectively filters out particulate matter in the waste liquid, and then the filtered waste liquid is detected by the pH meter 9, which facilitates the detection of the pH value in the waste liquid. According to the detection results, it is beneficial to add a neutralizing agent to the waste liquid through the feed pipe 10. At the same time, the stirring motor 7 drives the transmission shaft to rotate electrically, and the transmission shaft drives the stirring rod 8 to rotate, which is conducive to mixing and stirring the waste liquid and the neutralizing agent. After completion, the pH meter 9 is used to detect again. After the detection results meet the discharge standards, the valve is opened to discharge the treated waste liquid through the discharge pipe 6, ensuring that the values in the waste liquid meet the discharge standards, avoiding environmental pollution, ensuring the safety of the surrounding ecological environment, protecting the environment, and conforming to sustainable development. After the pH meter 9 comes into contact with the waste liquid, the glass electrode of the pH meter 9 responds to the hydrogen ion concentration in the waste liquid, thereby generating a corresponding potential change. The potential change is transmitted to the measurement circuit, and the measurement circuit amplifies and processes the weak signal generated by the electrode, converting it into the corresponding pH value data, which is conducive to detecting the change of the pH value in the waste liquid.

[0025] Embodiment 2

[0026] As Figures 1-5 shown, an exhaust port 12 is provided at the top of the scrubbing tower 1. An installation ring 13 is installed outside the exhaust port 12. A plurality of hydraulic telescopic rods 14 are installed at the top of the installation ring 13. A protective cover 15 is installed at the top of the hydraulic telescopic rods 14. A packing layer 17 is installed inside the scrubbing tower 1. The packing layer 17 is arranged between the second spray rack 18 and the first spray rack 16. A demister 19 is installed inside the scrubbing tower 1. The demister 19 is arranged above the second spray rack 18. The side of the first spray rack 16 is connected to a second connecting pipe 21. The side of the second spray rack 18 is connected to a first connecting pipe 20. One end of the first connecting pipe 20 is connected to a pump 22. One end of the second connecting pipe 21 is connected to the pump 22. The bottom of the pump 22 is installed with a storage tank 23. A support frame 11 is installed outside the scrubbing tower 1. The side of the storage tank 23 is connected to the outside of the support frame 11.

[0027] In this embodiment, the alkali water inside the storage tank 23 is pumped by the pump 22, and the first spray rack 16 and the second spray rack 18 spray the acid gas through the first connecting pipe 20 and the second connecting pipe 21. The first spray rack 16 is conducive to the first alkali washing of the acid gas. The acid gas reacts with the alkali water in a neutralization reaction to remove some acidic components. The acid gas after the first alkali washing continues to rise, passes through the packing layer 17, and contacts the sprayed alkali liquid again, increasing the gas-liquid contact area for deep purification, which is conducive to the second alkali washing, effectively removing the acidic substances in the acid gas and improving the washing efficiency. Then, it passes through the demister 19, which is conducive to separating the liquid droplets entrained in the gas and preventing the liquid droplets from being carried out of the washing tower 1. Finally, the purified gas is discharged through the exhaust port 12. When the washing tower 1 is not in use, it descends through the hydraulic telescopic rod 14, which is conducive to driving the protective cover 15 to descend, so that the protective cover 15 seals the exhaust port 12, preventing birds and the like from entering the exhaust port 12, ensuring the smoothness of the exhaust port 12, thereby ensuring the normal operation of the washing tower 1, reducing the equipment failure caused by birds, reducing the maintenance cost, and improving the stability and reliability of the operation of the washing tower 1. When the washing tower 1 is in use, the hydraulic telescopic rod 14 drives the protective cover 15 to rise, facilitating the opening of the exhaust port 12.

[0028] Working principle of this embodiment: When in use, first, the inlet pipe 2 facilitates the entry of the acid gas into the interior of the washing tower 1. The pump 22 pumps the alkali water inside the storage tank 23, and the first spray rack 16 and the second spray rack 18 spray the acid gas through the first connecting pipe 20 and the second connecting pipe 21. The first spray rack 16 is conducive to the first alkali washing of the acid gas. The acid gas reacts with the alkali water in a neutralization reaction to remove some acidic components. The acid gas after the first alkali washing continues to rise, passes through the packing layer 17, and contacts the sprayed alkali liquid again, which is conducive to the second alkali washing. Then, it passes through the demister 19, which is conducive to separating the liquid droplets entrained in the gas and preventing the liquid droplets from being carried out of the washing tower 1. Finally, the purified gas is discharged through the exhaust port 12. The waste liquid in the acid gas treatment process is discharged through the drain pipe 3. The filter element 5 effectively filters out the particulate matter in the waste liquid. Then, the pH meter 9 detects the filtered waste liquid, facilitating the detection of the pH value of the waste liquid. According to the detection result, it is conducive to adding a neutralizing agent to the waste liquid through the feed pipe 10. At the same time, the stirring motor 7 drives the transmission shaft to rotate electrically, and the transmission shaft drives the stirring rod 8 to rotate, which is conducive to mixing and stirring the waste liquid and the neutralizing agent. After completion, the pH meter 9 is used to detect again. After the detection result meets the discharge standard, the valve is opened, and the treated waste liquid is discharged through the discharge pipe 6, ensuring that the values in the waste liquid meet the discharge standard. When the washing tower 1 is not in use, it descends through the hydraulic telescopic rod 14, which is conducive to driving the protective cover 15 to descend, so that the protective cover 15 seals the exhaust port 12, preventing birds and the like from entering the exhaust port 12, ensuring the smoothness of the exhaust port 12, thereby ensuring the normal operation of the washing tower 1.

[0029] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in any other form. Any person skilled in the relevant art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as they do not depart from the technical solution content of the present utility model, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A secondary alkaline washing acid gas scrubbing tower, comprising a scrubbing tower (1), characterized in that: A first spray rack (16) and a second spray rack (18) are installed inside the washing tower (1), and the second spray rack (18) is arranged above the first spray rack (16). An air inlet pipe (2) is connected to the side of the washing tower (1), and a liquid discharge pipe (3) is connected to the bottom of the washing tower (1). A treatment box (4) is installed at the bottom of the liquid discharge pipe (3), and a filter element (5) is installed at the top of the treatment box (4). A pH meter (9) is installed through the side of the treatment box (4), and a stirring motor (7) is installed at the bottom of the treatment box (4). A transmission shaft is connected to the top of the stirring motor (7), and a plurality of stirring rods (8) are distributed on the outside of the transmission shaft. A feed pipe (10) is connected to the side of the treatment box (4).

2. The acid gas scrubbing tower for secondary alkali washing according to claim 1, characterized in that: The top of the washing tower (1) is provided with an exhaust port (12), the outer side of the exhaust port (12) is provided with a mounting ring (13), the top of the mounting ring (13) is provided with a plurality of hydraulic telescopic rods (14), and the top of the hydraulic telescopic rods (14) is provided with a protective cover (15).

3. The acid gas scrubbing tower for secondary alkali washing according to claim 1, characterized in that: A packing layer (17) is installed inside the washing tower (1), and the packing layer (17) is arranged between the second spray frame (18) and the first spray frame (16). A demister (19) is installed inside the washing tower (1), and the demister (19) is arranged above the second spray frame (18).

4. The acid gas scrubbing tower for secondary alkali washing according to claim 1, characterized in that: A second connecting pipe (21) is connected to the side of the first spray rack (16), a first connecting pipe (20) is connected to the side of the second spray rack (18), one end of the first connecting pipe (20) is connected to a pump (22), one end of the second connecting pipe (21) is connected to the pump (22), and a storage box (23) is installed at the bottom of the pump (22).

5. The acid gas scrubbing tower for secondary alkali washing according to claim 1, characterized in that: A discharge pipe (6) is connected to the side of the processing box (4), and a valve is provided in the middle of the discharge pipe (6).

6. The acid gas scrubbing tower for secondary alkali washing according to claim 4, characterized in that: A support frame (11) is installed on the outside of the washing tower (1), and the side surface of the storage box (23) is connected to the outside of the support frame (11).

Images