Hydrochloric acid tail gas purification treatment device

Abstract

The utility model discloses a hydrochloric acid tail gas purification treatment device, and relates to the technical field of hydrochloric acid tail gas purification, in particular to a hydrochloric acid tail gas purification treatment device which comprises a purification box, a gas inlet pipe is fixedly connected to the top of the purification box, and a liquid injection pipe and a liquid outlet pipe are fixedly connected to the front face of the purification box. A purification cavity communicated with the gas inlet pipe, the liquid injection pipe and the liquid outlet pipe is formed in the purification box, an exhaust pipe communicated with the purification cavity is fixedly installed in the purification box, a backflow pipe and a gas dispersing pipe are fixedly installed in the purification box, and the exhaust pipe, the backflow pipe and the gas dispersing pipe are intersected at a common point. And a commutation two-way valve for switching communication is arranged at the intersection point. Under the structural action of the gas outlet pipe, hydrochloric acid tail gas can be differentiated, so that the hydrochloric acid tail gas can be relatively uniformly located in the evolution cavity to rise, and under the cooperation of the evolution cavity and the conical spiral pipe structure, the hydrochloric acid tail gas can be relatively uniformly subjected to multi-layer evolution treatment.

Description

Technical Field

[0001] This utility model relates to the field of hydrochloric acid tail gas purification technology, specifically a hydrochloric acid tail gas purification and treatment device. Background Technology

[0002] The production of refrigerants such as HFC-134a and HFC-125 involves the generation and recovery of hydrochloric acid, a byproduct. Hydrochloric acid is an aqueous solution of hydrogen chloride (HCl), a monoprotic inorganic strong acid. It is a colorless, transparent liquid with a strong, pungent odor, high corrosiveness, and extremely high volatility, and is widely used in industry. During industrial production, the high volatility of hydrochloric acid results in the emission of large amounts of tail gas. If these highly corrosive and irritating tail gases are not treated promptly and properly, they can harm the health of workers and pollute the air. Therefore, a hydrochloric acid tail gas treatment device is needed to treat these tail gases. However, in the process of absorbing with alkaline solution, since the waste gas is directly introduced into the alkaline solution, large bubbles are generated after introduction, resulting in an unsatisfactory neutralization effect of the alkaline solution on the waste gas. Moreover, after the alkaline solution is neutralized, it affects the treatment effect of the waste gas. Therefore, we propose a hydrochloric acid tail gas purification and treatment device. Utility Model Content

[0003] This invention provides a hydrochloric acid tail gas purification and treatment device, which solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hydrochloric acid tail gas purification and treatment device, comprising an evolution chamber, an air inlet pipe fixedly connected to the top of the evolution chamber, an injection pipe and an outlet pipe fixedly connected to the front of the evolution chamber, an evolution chamber cavity communicating with the air inlet pipe, the injection pipe and the outlet pipe being opened inside the evolution chamber, an exhaust pipe communicating with the evolution chamber being fixedly installed inside the evolution chamber, and a return pipe and a diffuser pipe being fixedly installed inside the evolution chamber, the exhaust pipe, the return pipe and the diffuser pipe converging at a common point, and a switching dual-way valve being provided at the converging point, a real-time monitoring device for monitoring the gas in the exhaust pipe being installed inside the evolution chamber, the top of the evolution chamber being a tapered structure that gradually increases in size from bottom to top, and a rotatable tapered spiral tube corresponding to the tapered structure of the evolution chamber being installed on the top of the evolution chamber, while multiple vertically downward spray nozzles being opened on the tapered spiral tube.

[0005] Optionally, an air outlet pipe is fixedly connected to the side wall at the bottom of the evolution box. The air outlet pipe has a vortex-shaped structure and is connected to the air inlet pipe. Multiple vertically upward air outlets are opened at the top of the air outlet pipe.

[0006] Optionally, the return pipe is connected to the air inlet pipe, the liquid injection pipe is located above the air outlet pipe, and its liquid outlet pipe is located below the air outlet pipe. An infusion pipe is fixedly installed inside the evolution chamber, and a water pump is fixedly connected to one end of the infusion pipe. The water inlet of the water pump is connected to the bottom of the evolution chamber.

[0007] Optionally, the other end of the infusion tube is circularly and movably fitted to the top of the conical spiral tube. A fixing post is fixedly connected to the outer side of the top of the conical spiral tube, and one end of the fixing post is fixedly connected to an external toothed ring that is circularly and movably fitted on the evolution box.

[0008] Optionally, a first motor is fixedly installed inside the evolution box, and the output shaft of the first motor is fixedly connected to a gear connected inside the evolution box via a shaft pin, the gear meshing with an external gear ring.

[0009] Optionally, the real-time monitoring device includes a detection probe and a pH detection element. The detection probe is installed inside the exhaust pipe and is electrically connected to the pH detection element. A second motor is fixedly installed inside the purification chamber. The pH detection element includes a control component that can control the rotation of the output shaft of the second motor. The output shaft of the second motor is connected to a commutation double-way valve. The commutation double-way valve has a connecting groove inside that can connect the exhaust pipe and the return pipe or the exhaust pipe and the diffuser pipe.

[0010] Optionally, an activated carbon filter plate is installed inside the air diffuser, and an installation ring is threaded into the air diffuser. The activated carbon filter plate is installed inside the air diffuser by the abutment of the installation ring.

[0011] This utility model has the following beneficial effects:

[0012] 1. This hydrochloric acid tail gas purification and treatment device, through the structure of the outlet pipe, can differentiate the hydrochloric acid tail gas, so that it can rise relatively evenly in the purification chamber. With the cooperation of the purification chamber and the conical spiral tube structure, it can perform relatively uniform and multi-layer purification treatment, thereby ensuring the purification quality of the hydrochloric acid tail gas.

[0013] 2. This hydrochloric acid tail gas purification and treatment device, through the cooperation of a detection probe, a pH detection element, and a two-way valve, enables the exhaust pipe to switch between the return pipe and the diffuser pipe, allowing unpurified hydrochloric acid tail gas to flow back into the inlet pipe for further purification. This allows for real-time monitoring of the purification of hydrochloric acid tail gas, thereby ensuring the purification quality of the hydrochloric acid tail gas. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the front sectional view of the present invention;

[0016] Figure 3 This is a top sectional view of the structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the conical spiral tube connection of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure at point A of this utility model;

[0019] Figure 6 This is a structural schematic diagram of part B of the present invention.

[0020] In the diagram: 1. Evolution chamber; 2. Air inlet pipe; 3. Liquid injection pipe; 4. Liquid outlet pipe; 5. Evolution chamber; 6. Air outlet pipe; 7. Liquid delivery pipe; 8. Water pump; 9. Exhaust pipe; 10. Return pipe; 11. Two-way valve for exchange; 12. Gas dispersing pipe; 13. Activated carbon filter plate; 14. Mounting ring; 15. Conical spiral tube; 16. Fixing column; 17. External gear ring; 18. Gear; 19. First motor; 20. Connecting groove; 21. Second motor; 22. Detection probe; 23. pH detection element. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 6A hydrochloric acid exhaust gas purification and treatment device includes an evolution chamber 1. An inlet pipe 2 is fixedly connected to the top of the evolution chamber 1, through which hydrochloric acid exhaust gas can be injected. An injection pipe 3 and an outlet pipe 4 are fixedly connected to the front of the evolution chamber 1, through which alkali solution can be injected and through which the liquid can be discharged, thereby achieving timely replacement of the alkali solution. An evolution chamber 5 is provided inside the evolution chamber 1, communicating with the inlet pipe 2, injection pipe 3, and outlet pipe 4, where the alkali solution can be stored. Inside the evolution chamber 1, an exhaust pipe 9 connected to the evolution chamber 5 is fixedly installed. The purified hydrochloric acid waste gas in the evolution chamber 5 can enter the exhaust pipe 9. A return pipe 10 and a diffuser pipe 12 are also fixedly installed inside the evolution chamber 1. The exhaust pipe 9, return pipe 10, and diffuser pipe 12 converge at a common point, and a switching double-way valve 11 is installed at this convergence point. Through the connection of the switching double-way valve 11, the exhaust pipe 9 can connect independently to the return pipe 10 or the diffuser pipe 12. Pipe 12 is connected, and a real-time monitoring device is installed in the purification chamber 1 to monitor the gas in the exhaust pipe 9, thereby monitoring the hydrochloric acid tail gas. If the gas is unqualified, the exhaust pipe 9 is connected to the return pipe 10, allowing the gas to enter the intake pipe 2 for re-purification. If the gas is qualified, the exhaust pipe 9 is connected to the diffuser pipe 12, and the gas is discharged through the diffuser pipe 12. The top of the purification chamber 5 is a cone-shaped structure that gradually increases in size from bottom to top, which allows the hydrochloric acid tail gas to concentrate towards the center during the upward process. A rotatable conical spiral tube 15 corresponding to the conical structure of the purification chamber 5 is installed at the top of the purification chamber 5. Under the action of the rotation of the conical spiral tube 15, the spraying of alkaline solution is more uniform, and under the action of the structure of the conical spiral tube 15, multiple layers of alkaline solution can be formed to purify the hydrochloric acid tail gas, performing multi-layer purification treatment, thereby ensuring the purification quality of the hydrochloric acid tail gas. At the same time, multiple vertically downward water spray nozzles are opened on the conical spiral tube 15.

[0023] Please see Figures 1 to 3 An exhaust pipe 6 is fixedly connected to the side wall at the bottom of the evolution chamber 1. The exhaust pipe 6 has a vortex-shaped structure and is connected to the inlet pipe 2, so that the hydrochloric acid tail gas can enter the exhaust pipe 6. The top of the exhaust pipe 6 has multiple vertically upward exhaust ports. Under the action of the structure of the exhaust pipe 6 and the exhaust ports, the hydrochloric acid tail gas floats up from the alkaline solution for the first purification treatment, and can rise relatively evenly in the evolution chamber 5 under the diversion of the exhaust ports.

[0024] Please see Figures 1 to 3The return pipe 10 is connected to the air inlet pipe 2. The liquid injection pipe 3 is located above the air outlet pipe 6, and its liquid outlet pipe 4 is located below the air outlet pipe 6. Its alkaline solution can immerse the air outlet pipe 6, so that when the hydrochloric acid tail gas is discharged from the air outlet pipe 6, the first evolution treatment is performed. The inside of the evolution box 1 is fixedly installed with a liquid infusion pipe 7. One end of the liquid infusion pipe 7 is fixedly connected to a water pump 8. The water inlet of the water pump 8 is connected to the bottom of the evolution chamber 5. Under the action of the water pump 8, the alkaline solution in the evolution chamber 5 can be pumped and transported to the liquid infusion pipe 7.

[0025] Please see Figures 1 to 5 The other end of the infusion tube 7 is circularly and movably fitted to the top of the conical spiral tube 15. The conical spiral tube 15 can rotate in a fixed position on the infusion tube 7. A fixing post 16 is fixedly connected to the outer side of the top of the conical spiral tube 15. Under the drive of the fixing post 16, the conical spiral tube 15 can rotate. One end of the fixing post 16 is fixedly connected to an external toothed ring 17 that is circularly and movably fitted on the evolution box 1. Under the drive of the external toothed ring 17, the fixing post 16 can rotate, and the external toothed ring 17 can rotate in a fixed position on the evolution box 1.

[0026] Please see Figures 1 to 5 The evolution box 1 is equipped with a first motor 19. The output shaft of the first motor 19 is fixedly connected to a gear 18 connected to the evolution box 1 via a shaft pin. Driven by the output shaft of the first motor 19, the gear 18 can rotate. The first motor 19 is existing technology and will not be described in detail here. The gear 18 can rotate in a fixed position on the evolution box 1. The gear 18 meshes with the external gear ring 17. Driven by the gear 18, the external gear ring 17 can rotate.

[0027] Please see Figures 1 to 6The real-time monitoring device includes a detection probe 22 and a pH detection element 23. The detection probe 22 is installed inside the exhaust pipe 9 and is electrically connected to the pH detection element 23. A second motor 21 is fixedly installed inside the purification chamber 1. The pH detection element 23 includes a control component that controls the rotation of the output shaft of the second motor 21. The output shaft of the second motor 21 is connected to a commutation double-way valve 11. The commutation double-way valve 11 has an opening that connects the exhaust pipe 9 and the return pipe 10 or the exhaust pipe 9 and the diffuser pipe 12. The purified hydrochloric acid tail gas can enter the exhaust pipe 9 through the through channel 20. Then, under the detection of the detection probe 22, it can transmit a signal to the pH detection element 23, thereby controlling the second motor 21 to drive it. Driven by the output shaft of the second motor 21, the commutation double-way valve 11 can rotate. If the gas is unqualified, the through channel 20 connects the exhaust pipe 9 and the return pipe 10, so that the gas can enter the intake pipe 2 for re-purification. If the gas is qualified, the through channel 20 connects the exhaust pipe 9 and the diffuser pipe 12.

[0028] Please see Figures 1 to 4 An activated carbon filter plate 13 is installed inside the vent pipe 12. Under the action of the activated carbon filter plate 13, the hydrochloric acid tail gas can be purified for the last time. An installation ring 14 is threaded inside the vent pipe 12. The activated carbon filter plate 13 is installed inside the vent pipe 12 by the abutment of the installation ring 14. The abutment of the installation ring 14 makes the activated carbon filter plate 13 stably installed inside the vent pipe 12.

[0029] In summary, this hydrochloric acid tail gas purification device, during use, injects hydrochloric acid tail gas into the purification chamber 1 through the inlet pipe 2, injects alkaline solution into the purification chamber 5 through the injection pipe 3, and submerges the outlet pipe 6. The hydrochloric acid tail gas entering the inlet pipe 2 is then transported into the outlet pipe 6. Through the outlet on the outlet pipe 6, the hydrochloric acid tail gas rises from the alkaline solution for the first purification treatment. Due to the diversion at the outlet, it rises relatively evenly within the purification chamber 5. Driven by the output shaft of the first motor 19, the gear 18 rotates, which in turn rotates the external gear ring 17. This, in turn, rotates the conical spiral tube 15 via the fixed column 16. The structure of the conical spiral tube 15 ensures that the alkaline solution sprayed from its nozzles is evenly distributed. The purification chamber 5 is completely covered, forming multiple layers of purification treatment, thus making the purification treatment of hydrochloric acid tail gas more thorough. The purified hydrochloric acid tail gas can enter the exhaust pipe 9, and then, under the detection of the detection probe 22, it can transmit a signal to the pH detection element 23, thereby controlling the second motor 21 to drive it. Under the drive of the output shaft of the second motor 21, the commutation double-way valve 11 can rotate. If the gas is unqualified, the connecting groove 20 connects the exhaust pipe 9 and the return pipe 10, allowing the gas to enter the intake pipe 2 for re-purification treatment. If the gas is qualified, the connecting groove 20 connects the exhaust pipe 9 and the diffuser pipe 12, and the gas passes through the activated carbon filter plate 13 for a final purification treatment before being discharged.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not indicate or imply that the device or element 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; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydrochloric acid tail gas purification treatment device, comprising an evolution box (1), the top of the evolution box (1) is fixedly connected with an air inlet pipe (2), the front of the evolution box (1) is fixedly connected with a liquid injection pipe (3) and a liquid outlet pipe (4), characterized in that: The inside of the evolution box (1) is provided with an evolution cavity (5) communicated with the air inlet pipe (2), the liquid injection pipe (3) and the liquid outlet pipe (4), the inside of the evolution box (1) is fixedly provided with an exhaust pipe (9) communicated with the evolution cavity (5), and a reflux pipe (10) and a gas dispersion pipe (12) are fixedly arranged in the evolution box (1), the exhaust pipe (9), the reflux pipe (10) and the gas dispersion pipe (12) are combined at a common point, and a switching communication commutation double-way valve (11) is arranged at the common point, a real-time monitoring device for monitoring the gas in the exhaust pipe (9) is arranged in the evolution box (1), the top of the evolution cavity (5) is in a taper structure gradually increasing from bottom to top, and a rotatable taper spiral pipe (15) corresponding to the taper structure of the evolution cavity (5) is arranged at the top of the evolution cavity (5), and a plurality of vertical downward water spraying nozzles are arranged on the taper spiral pipe (15).

2. The hydrochloric acid tail gas purification treatment apparatus according to claim 1, characterized by: The side wall of the bottom of the evolution box (1) is fixedly connected with an air outlet pipe (6) in a vortex structure, the air outlet pipe (6) is communicated with the air inlet pipe (2), and a plurality of vertical upward air outlets are arranged at the top of the air outlet pipe (6).

3. The hydrochloric acid tail gas purification treatment apparatus according to claim 2, characterized by: The reflux pipe (10) is communicated with the air inlet pipe (2), the liquid injection pipe (3) is arranged above the air outlet pipe (6), the liquid outlet pipe (4) is arranged below the air outlet pipe (6), a liquid delivery pipe (7) is fixedly arranged in the evolution box (1), one end of the liquid delivery pipe (7) is fixedly connected with a water pump (8), and the water inlet of the water pump (8) is communicated with the bottom of the evolution cavity (5).

4. The hydrochloric acid tail gas purification treatment apparatus according to claim 3, characterized by: The other end of the liquid delivery pipe (7) is circularly movably sleeved with the top end of the taper spiral pipe (15), the outside of the top end of the taper spiral pipe (15) is fixedly connected with a fixed column (16), and one end of the fixed column (16) is fixedly connected with an external tooth ring (17) circularly movably sleeved on the evolution box (1).

5. The hydrochloric acid tail gas purification treatment apparatus according to claim 4, characterized by: A first motor (19) is fixedly arranged in the evolution box (1), the output shaft of the first motor (19) is fixedly connected with a gear (18) connected in the evolution box (1) through a shaft pin, and the gear (18) is engaged with the external tooth ring (17).

6. The hydrochloric acid tail gas purification treatment apparatus according to claim 5, characterized by: The real-time monitoring device comprises a detection probe (22) and a PH detection element (23), the detection probe (22) is arranged in the exhaust pipe (9) and electrically connected with the PH detection element (23), a second motor (21) is fixedly arranged in the evolution box (1), the PH detection element (23) comprises a control assembly capable of controlling the rotation of the output shaft of the second motor (21), the output shaft of the second motor (21) is connected with the commutation double-way valve (11), and the commutation double-way valve (11) is provided with a communication groove (20) for communicating the exhaust pipe (9) with the reflux pipe (10) or the exhaust pipe (9) with the gas dispersion pipe (12).

7. The hydrochloric acid tail gas purification treatment apparatus according to claim 6, characterized by: The inside of the air diffuser pipe (12) is provided with an activated carbon filter screen plate (13), and the air diffuser pipe (12) is threadedly connected with a mounting ring (14), and the activated carbon filter screen plate (13) is mounted in the air diffuser pipe (12) through abutting of the mounting ring (14).

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