Corrosive gas absorption system

Abstract

The utility model relates to a corrosive gas absorption system. The corrosive gas absorption system comprises an absorption tank, a heat exchanger, a peristaltic pump and a diaphragm pump, a gas inlet pipe and a liquid inlet pipe are arranged on the absorption tank, a nozzle is arranged at the end of the liquid inlet pipe, the lower end of the gas inlet pipe is located on the lower side of the liquid inlet pipe, the upper end of the gas inlet pipe is connected with a first connecting pipe, and the peristaltic pump is arranged on the first connecting pipe; the diaphragm pump is used for pumping corrosive gas into the absorption tank, a cooling coil is arranged in the absorption tank, a cooling liquid inlet pipe and a cooling liquid outlet pipe are arranged on the absorption tank, the bottom of the absorption tank is communicated with an inlet of the cooling coil through a second connecting pipe, and a liquid inlet of the diaphragm pump is communicated with an outlet of the cooling coil through a third connecting pipe; and a liquid outlet of the diaphragm pump is communicated with the liquid inlet pipe through a fourth connecting pipe. The pressure of the corrosive gas is increased after the corrosive gas flows through the peristaltic pump, so that the gas in the gas storage bag can be completely conveyed into the absorption tank, and the pressure during gas absorption can be increased. The corrosive gas enters the absorption tank after passing through the one-way valve after being pressurized, and the tail end section of the gas outlet is provided with the filter cloth, so that absorption liquid is effectively prevented from entering a gas pipeline. The absorption liquid is sprayed into the absorption tank, and tiny liquid drops generated by spraying are beneficial to rapid absorption of corrosive gas. After heat generated in the absorption process is cooled through the heat exchanger, high absorption driving force is maintained, and efficient absorption is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of absorption equipment, and in particular relates to a corrosive gas absorption system. Background Art

[0002] Gas absorption refers to the process of transferring one or more gas components in a mixed gas from the gas phase to the main phase of the absorbent, and is widely used in gas separation. If the absorbent has a very strong absorption capacity for each component in the gas phase, all gas components will be transferred to the absorbent after absorption is completed, and the gas phase composition can be obtained by analyzing the content of the components in the absorbent. For some highly corrosive and easily absorbed mixed gases, in the absence of direct component analysis instruments, the gas composition can be analyzed indirectly through absorption.

[0003] The existing gas absorption device is generally a glass container, which introduces the gas into the absorption liquid through a conduit for absorption. During the absorption process, incomplete absorption, gas overflow, absorption liquid back-absorption and other phenomena often occur. In addition, the glass absorption device cannot be used to absorb corrosive gases containing hydrogen fluoride. Therefore, it is necessary to provide a corrosive gas absorption system. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a corrosive gas absorption system.

[0005] The technical solution of a corrosive gas absorption system of the utility model is:

[0006] A corrosive gas absorption system comprises an absorption tank, a heat exchanger, a peristaltic pump and a diaphragm pump, wherein the absorption tank is provided with an air inlet pipe and a liquid inlet pipe, the end of the liquid inlet pipe is provided with a nozzle, the lower end of the air inlet pipe is located at the lower side of the liquid inlet pipe, the upper end of the air inlet pipe is connected to a first connecting pipe, the peristaltic pump is arranged on the first connecting pipe, and is used to pump the corrosive gas into the absorption tank, a cooling coil is arranged inside the absorption tank, a coolant inlet pipe and a coolant outlet pipe are arranged on the absorption tank, the bottom of the absorption tank is connected to the inlet of the cooling coil through the second connecting pipe, the liquid inlet of the diaphragm pump is connected to the outlet of the cooling coil through the third connecting pipe, and the liquid outlet of the diaphragm pump is connected to the liquid inlet pipe through the fourth connecting pipe.

[0007] Furthermore, a one-way valve located between the peristaltic pump and the air inlet pipe is provided on the first connecting pipe, and the first connecting pipe is a fluororubber hose.

[0008] Furthermore, the first connecting pipe is provided with a first three-way valve located between the one-way valve and the air intake pipe, a spare pipe for air intake is provided on the third interface of the first three-way valve, and an air storage bag is provided at one end of the first connecting pipe away from the air intake pipe.

[0009] Furthermore, the absorption tank includes a tank body and a tank cover which is sealed and detachably connected to the upper end of the tank body, the tank body includes an integrally formed conical section and a cylindrical section located at the upper end of the conical section, the upper end of the air inlet pipe is connected to the first connecting pipe via a ferrule-to-external conical threaded joint, the liquid inlet pipe is connected to the fourth connecting pipe via a ferrule-to-external conical threaded joint, the lower end of the conical section is provided with a liquid outlet pipe, and the liquid outlet pipe is connected to the second connecting pipe via a ferrule-to-external conical threaded joint.

[0010] Furthermore, the inlet of the cooling coil is connected to the second connecting pipe via a ferrule-to-external cone thread joint, and the outlet of the cooling coil is connected to the third connecting pipe via a ferrule-to-external cone thread joint, and the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all ethylene tubes.

[0011] Furthermore, the fourth connecting pipe is provided with a second three-way valve, and the third interface of the second three-way valve is connected to a drain pipe.

[0012] Furthermore, the coolant inlet pipe is located at the lower side of the coolant outlet pipe.

[0013] The utility model provides a corrosive gas absorption system, which has the following beneficial effects:

[0014] The corrosive gas absorption system of the utility model is suitable for the absorption of alkaline and acidic gases, especially hydrogen fluoride-containing gases. By arranging a one-way valve and a filter cloth on the air inlet pipe, the mist is effectively prevented from entering the air storage bag, thereby ensuring that the gas absorption is only carried out in the absorption tank. The gas is transported to the absorption tank by a peristaltic pump, which not only increases the pressure of the gas but also adjusts the air intake rate. The heat released during gas absorption is taken away by the heat exchange fluid through the heat exchange coil, thereby ensuring that the absorption is thorough. The adsorption liquid after heat exchange is transported back to the absorption tank by a diaphragm pump to complete the cooling and circulation of the absorption liquid. The circulated absorption liquid is sprayed into the absorption tank, providing a sufficiently large mass transfer area for gas absorption, thereby ensuring that the absorption is carried out quickly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a flow chart of the corrosive gas absorption system of the utility model;

[0016] In the figure: 1. air storage bag; 2. absorption tank; 3. heat exchanger; 4. diaphragm pump; 5. peristaltic pump; 6. first connecting pipe; 7. second connecting pipe; 8. third connecting pipe; 9. fourth connecting pipe; 10. one-way valve; 11. first three-way valve; 12. second three-way valve; 13. filter cloth; 14. atomizing nozzle; 15. cooling coil; 16. coolant inlet pipe; 17. coolant outlet pipe; 18. ferrule to external cone thread connector. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0018] The specific embodiment of the corrosive gas absorption system of the utility model is as follows: Figure 1 As shown, it includes an air storage bag 1, an absorption tank 2, a heat exchanger 3, a peristaltic pump 5, a diaphragm pump 4, a first connecting pipe 6, a second connecting pipe 7, a third connecting pipe 8 and a fourth connecting pipe 9. The first connecting pipe 6 is a fluororubber hose, and the second connecting pipe 7, the third connecting pipe 8 and the fourth connecting pipe 9 are ethylene tubes.

[0019] One end of the first connecting tube 6 is in communication with the air storage bag 1, and the peristaltic pump 5 is connected to the first connecting tube 6. A one-way valve 10 is connected to the first connecting tube 6 on the side of the peristaltic pump 5 away from the air storage bag 1, and the one-way valve 10 is used to prevent the gas in the first connecting tube 6 from flowing back to the side of the air storage bag 1. A first three-way valve 11 is connected to the first connecting tube 6 on the side of the one-way valve 10 away from the air storage bag 1, and a spare pipe for air intake is connected to the third interface of the first three-way valve 11, and a stop valve is installed on the spare pipe.

[0020] The absorption tank 2 includes a tank body and a tank cover, and the tank cover is fixedly connected to the upper side of the tank body by bolt fasteners. The length of the tank body is 70 mm and the wall thickness is 7.5 mm. An O-type fluororubber ring is placed between the tank body and the tank cover. The tank body is fixed vertically on the bracket. The tank body includes an integrally formed conical section and a cylindrical section located on the upper side of the conical section. The inner diameter of the cylindrical section is 45mm. A liquid outlet pipe is provided at the center of the lower end of the conical section. A ferrule-to-external conical thread joint is installed on the outlet of the liquid outlet pipe. The tank cover is fixedly connected with a liquid inlet pipe and an air inlet pipe. The lower end of the air inlet pipe extends into the bottom of the columnar section, and the end of the liquid inlet pipe is located at the upper position of the columnar section. The lower end of the air inlet pipe has a 600-mesh polytetrafluoroethylene filter cloth 13, and the end of the liquid inlet pipe is installed with an atomizing nozzle 14. The upper end of the liquid inlet pipe extends out of the upper side of the tank cover, and the end is installed with a ferrule-to-external cone thread joint. The upper end of the air inlet pipe extends out of the upper side of the tank cover, and a ferrule-to-external cone thread joint is installed at the end. The end of the first connecting pipe 6 is fixedly connected to the ferrule-to-external cone thread joint 18 at the upper end of the air intake pipe.

[0021] The heat exchanger 3 has a cooling coil 15 inside, and the cooling coil 15 is a polytetrafluoroethylene coil. The heat exchanger 3 has a tube bundle rack inside, and the cooling coil 15 is fixed on the tube bundle rack. The outer wall of the heat exchanger 3 has a coolant inlet pipe 16 and a coolant outlet pipe 17. The coolant inlet pipe 16 is located at the lower side of the coolant outlet pipe 17. The coolant inlet pipe 16 and the coolant outlet pipe 17 are connected to the external cooling system for circulating coolant into the heat exchanger 3. The inlet and outlet of the cooling coil 15 extend out of the upper side of the heat exchanger 3 respectively, and the ends of the inlet and outlet of the cooling coil 15 are respectively installed with a ferrule-to-external cone thread joint The ferrule-to-external-cone-threaded joint 18 on the inlet of the cooling coil 15 is connected to the second connecting pipe 7, and the other end of the second connecting pipe 7 is connected to the ferrule-to-external-cone-threaded joint 18 on the liquid outlet pipe. The ferrule-to-external-cone-threaded joint 18 on the outlet of the cooling liquid coil is connected to the third connecting pipe 8, and the other end of the third connecting pipe 8 is connected to the liquid inlet of the diaphragm pump 4. The liquid outlet of the diaphragm pump 4 is connected to the fourth connecting pipe 9, and the other end of the fourth connecting pipe 9 is connected to the ferrule-to-external-cone-threaded joint 18 at the end of the liquid inlet pipe. The fourth connecting pipe 9 is connected to the second three-way valve 12, and the third interface of the second three-way valve 12 is connected to the liquid discharge pipe, and a stop valve is installed on the liquid discharge pipe.

[0022] When the corrosive gas absorption system of the utility model is used, the pressure of the corrosive gas increases after flowing through the peristaltic pump 5, which not only helps to transport all the gas in the gas storage bag 1 to the absorption tank 2, but also increases the pressure during gas absorption. After being pressurized, the corrosive gas first passes through the one-way valve 10 and then enters the absorption tank 2. The end section of the gas outlet has a filter cloth 13, which effectively prevents the absorption liquid from entering the gas pipeline. The absorption liquid is sprayed into the absorption tank 2, and the tiny droplets generated by the spraying are conducive to the rapid absorption of the corrosive gas. The heat generated during the absorption process is cooled by the heat exchanger 3, maintaining a high absorption driving force, which is conducive to efficient absorption.

[0023] The corrosive gas absorption system of the utility model is suitable for the absorption of alkaline and acidic gases, especially hydrogen fluoride-containing gases. By arranging a one-way valve and a filter cloth 13 on the air inlet pipe, the mist is effectively prevented from entering the air storage bag 1, thereby ensuring that the gas absorption is only carried out in the absorption tank 2. The gas is transported to the absorption tank 2 by the peristaltic pump 5, which not only increases the pressure of the gas but also adjusts the air intake rate. The heat released during gas absorption is taken away by the heat exchange fluid through the heat exchange coil, thereby ensuring that the absorption is thorough. The adsorption liquid after heat exchange is transported back to the absorption tank 2 by the diaphragm pump 4 to complete the cooling and circulation of the absorption liquid. The circulated absorption liquid is sprayed into the absorption tank 2, providing a sufficiently large mass transfer area for gas absorption, thereby ensuring that the absorption is carried out quickly and efficiently.

[0024] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A corrosive gas absorption system, characterized in that: It includes an absorption tank, a heat exchanger, a peristaltic pump and a diaphragm pump. The absorption tank is provided with an air inlet pipe and a liquid inlet pipe. The end of the air inlet pipe is provided with a filter cloth, the end of the liquid inlet pipe is provided with a nozzle, the lower end of the air inlet pipe is located at the lower side of the liquid inlet pipe, the upper end of the air inlet pipe is connected with a first connecting pipe, the peristaltic pump is arranged on the first connecting pipe, and is used to pump the corrosive gas into the absorption tank. A cooling coil is arranged inside the absorption tank, and a coolant inlet pipe and a coolant outlet pipe are arranged on the absorption tank. The bottom of the absorption tank is connected to the inlet of the cooling coil through the second connecting pipe, the liquid inlet of the diaphragm pump is connected to the outlet of the cooling coil through the third connecting pipe, and the liquid outlet of the diaphragm pump is connected to the liquid inlet pipe through the fourth connecting pipe.

2. The corrosive gas absorption system according to claim 1, characterized in that: The first connecting pipe is provided with a one-way valve located between the peristaltic pump and the air inlet pipe, and the first connecting pipe is a fluororubber hose.

3. The corrosive gas absorption system according to claim 2, characterized in that: The first connecting pipe is provided with a first three-way valve located between the one-way valve and the air intake pipe, the third interface of the first three-way valve is provided with a spare pipe for air intake, and an air storage bag is provided at one end of the first connecting pipe away from the air intake pipe.

4. The corrosive gas absorption system according to claim 1, characterized in that: The absorption tank includes a tank body and a tank cover which is sealed and detachably connected to the upper end of the tank body. The tank body includes an integrally formed conical section and a cylindrical section located at the upper end of the conical section. The upper end of the air inlet pipe is connected to the first connecting pipe via a ferrule-to-external conical threaded joint, the liquid inlet pipe is connected to the fourth connecting pipe via a ferrule-to-external conical threaded joint, and a liquid outlet pipe is provided at the lower end of the conical section, which is connected to the second connecting pipe via a ferrule-to-external conical threaded joint.

5. The corrosive gas absorption system according to claim 1, characterized in that: The inlet of the cooling coil is connected to the second connecting pipe through a ferrule-to-external cone thread joint, and the outlet of the cooling coil is connected to the third connecting pipe through a ferrule-to-external cone thread joint. The second connecting pipe, the third connecting pipe and the fourth connecting pipe are all ethylene tubes.

6. The corrosive gas absorption system according to claim 1, characterized in that: The fourth connecting pipe is provided with a second three-way valve, and the third interface of the second three-way valve is connected with a drain pipe.

7. The corrosive gas absorption system according to claim 1, characterized in that: The coolant inlet pipe is located at the lower side of the coolant outlet pipe.

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