A continuous stable conveying device for acid and alkaline fluid used in tail gas treatment

Abstract

The utility model discloses a kind of acid-base fluid continuous stable conveying devices for tail gas treatment, it is related to tail gas treatment technical field, the utility model includes base and fluorine lining centrifugal pump, base is provided with liquid storage tank, cooling water coil pipe is provided in liquid storage tank, liquid is provided in liquid storage tank, liquid includes coolant and color developing reagent, color developing reagent and acid-base solution contact can appear discoloration reaction, cooling pipe and reflux pipe are on liquid storage tank, chromaticity sensor is provided on reflux pipe;By adding color developing reagent in coolant and matching chromaticity sensor, the color change generated by the reaction of color developing reagent and leaked acid-base solution can be identified, and then signal is transmitted to background, can make prompt in the early stage of leakage, make the damage of pump control in minimum, avoid the damage of other components, reduce maintenance cost, avoid liquid serious leakage pollution environment, by cannula and connecting pipe can be quickly installed and disassembled to reflux pipe, cooling pipe.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, specifically to a continuous and stable conveying device for acidic and alkaline fluids in exhaust gas treatment. Background Technology

[0002] Exhaust gases often contain acidic or alkaline pollutants. Acid and alkali solutions can efficiently remove these pollutants through neutralization reactions, achieving the purpose of purification. Currently, the pump equipment used for continuous and stable transportation of large-flow, high-head, acidic and alkaline fluids mainly includes three types: fluoroplastic magnetic pumps, fluoroplastic self-priming pumps, and fluoropolymer-lined centrifugal pumps. Fluoropolymer-lined centrifugal pumps have the characteristics of high head and strong corrosion resistance, and are suitable for high-temperature and high-pressure working conditions. They have low procurement costs and low difficulty and cost of single maintenance.

[0003] Fluorine-lined centrifugal pumps often use cartridge mechanical seals, which are susceptible to corrosion and damage from particulate matter or acidic / alkaline working media, leading to leakage. The damage process of the mechanical seal goes through the following three stages: ① Initial stage: slight corrosion and wear. Due to the intrusion of particulate matter or acidic / alkaline working media into the sealing surface, corrosion spots and slight etching occur at the sealing surface boundary, allowing a small amount of working media to enter. ② Mid-stage: intensified seal damage. Corrosion and wear intensify, forming a leakage channel. A large amount of working media enters, the cooling effect of the coolant decreases, and wear and heat generation intensifies, further aggravating corrosion and wear. ③ Late stage: complete seal failure. The sealing surface completely shatters, forming a jet channel. A large amount of working media flows out, affecting personnel and environmental safety. This defect cannot be detected in advance and is a major concern.

[0004] In existing fluoropolymer-lined centrifugal pumps, the condition of the cartridge mechanical seal is usually assessed by operators through vibration and sound, often only being detected in the late stages of damage. Early and mid-stage corrosion and wear are not promptly detected, leading to the failure to identify even minor leaks. Over time, large amounts of particulate matter or acidic / alkaline working media enter the mechanical seal's sealing surface and cooling chamber, causing the internal components of the mechanical seal to deteriorate. This results in reduced coolant cooling efficiency, abnormally high internal temperatures, accelerated damage to sliding bearings and mechanical seal components, and also increases the risk of acidic / alkaline working media leaking into the environment, causing environmental pollution and posing safety risks to personnel. Utility Model Content

[0005] The purpose of this invention is to provide a continuous and stable conveying device for acidic and alkaline fluids in exhaust gas treatment, so as to solve the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous and stable conveying device for acidic and alkaline fluids in exhaust gas treatment, comprising a base and a fluoropolymer-lined centrifugal pump mounted thereon, a storage tank fixedly mounted on the base, a cooling water coil fixedly mounted inside the storage tank, a liquid contained in the storage tank, the liquid comprising a coolant and a colorimetric reagent, the colorimetric reagent exhibiting a color change reaction upon contact with the acidic or alkaline solution, a cooling pipe and a reflux pipe fixedly mounted on the storage tank, and a colorimetric sensor fixedly mounted on the reflux pipe.

[0007] Preferably, both the cooling pipe and the return pipe are transparent PU pipes.

[0008] Preferably, the cooling pipe and the return pipe are provided with inserts at the ends near the liquid storage tank. The outer circumference of the liquid storage tank is fixedly connected to two fixed pipes. Each fixed pipe is fixedly connected to a connecting pipe adapted to the insert. Each insert has a limit groove on its outer circumference. Each connecting pipe has multiple moving grooves at the end away from the liquid storage tank. Each moving groove has a sliding abutment ball.

[0009] Preferably, a movable cylinder is slidably disposed on the outer circumferential surface of the connecting pipe, the movable cylinder including an abutting part, and a spring is fixedly disposed between the abutting part and the fixed pipe.

[0010] Preferably, a sealing gasket is fixedly installed inside each of the connecting pipes.

[0011] Preferably, each of the tubes is rotatably provided with an abutment frame, and each of the movable cylinders has a slot at the end away from the liquid storage tank that mates with the abutment frame.

[0012] Preferably, a column is fixedly installed on the base, a screw is internally threaded onto the column, a rotating plate is rotatably installed on the top of the screw, and a limit ring is fixedly installed at the end of the rotating plate away from the screw.

[0013] In the above technical solution, this utility model provides a continuous and stable conveying device for acidic and alkaline fluids for exhaust gas treatment, which has the following beneficial effects: by adding a colorimetric reagent to the coolant and using a colorimetric sensor, it can identify the color change produced by the reaction of the colorimetric reagent with the leaked acidic or alkaline solution, and then transmit the signal to the background. It can provide a warning at the beginning and middle of the leak, minimize the damage to the pump, avoid damage to other components, reduce maintenance costs, and prevent serious liquid leakage from polluting the environment. The return pipe and cooling pipe can be quickly installed and disassembled through the insertion and connection of the pipe. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the limiting ring provided in an embodiment of the present utility model;

[0017] Figure 3 A schematic diagram of the structure of the cooling water coil provided in the embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the abutment frame provided in an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the connecting pipe provided in an embodiment of the present utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Base; 2. Fluorine-lined centrifugal pump; 3. Storage tank; 4. Cooling water coil; 5. Color sensor; 6. Fixing pipe; 7. Connecting pipe; 8. Sealing gasket; 9. Moving groove; 10. Abutting ball; 11. Moving cylinder; 12. Abutting part; 13. Slot; 14. Spring; 15. Insertion tube; 151. Limiting groove; 16. Abutting frame; 17. Cooling pipe; 18. Return pipe; 19. Column; 20. Screw; 21. Rotating plate; 22. Limiting ring; 23. Fastening bolt. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figure 1-5A continuous and stable conveying device for acidic and alkaline fluids in exhaust gas treatment is proposed. The technical solution includes a base 1 and a fluoropolymer-lined centrifugal pump 2 mounted on it. A storage tank 3 is fixedly mounted on the base 1, and a cooling water coil 4 is fixedly mounted inside the storage tank 3. The storage tank 3 contains a liquid, including a coolant and a colorimetric reagent. The colorimetric reagent will change color upon contact with the acid or alkaline solution. A cooling pipe 17 and a return pipe 18 are fixedly mounted on the storage tank 3, and a colorimetric sensor 5 is fixedly mounted on the return pipe 18. The fluoropolymer-lined centrifugal pump 2 is fixedly mounted on the base 1, and the storage tank 3 is fixedly mounted on the base 1. A cooling water coil 4 is installed on one side of the fluoropolymer-lined centrifugal pump 2, with the bottom of the outlet pump higher than the mechanical seal of the fluoropolymer-lined centrifugal pump 2. The cooling water coil 4 is welded inside the storage tank 3, and the coolant level in the storage tank 3 is higher than that in the cooling water coil 4. The cooling water coil 4 is existing technology and will not be described in detail. The cooling water coil 4 cools the coolant in the storage tank 3, thereby increasing the cooling effect of the coolant on the mechanical seal. It also cools the coolant returning to the storage tank 3. One end of the cooling pipe 17 is fixedly connected to the bottom of the storage tank 3, and the other end is connected to the bottom of the coolant chamber of the mechanical seal of the fluoropolymer-lined centrifugal pump 2. The inlet is fixedly connected, and one end of the return pipe 18 is fixedly connected to the upper part of the storage tank 3, while the other end is fixedly connected to the outlet at the top of the coolant chamber of the mechanical seal of the fluoropolymer-lined centrifugal pump 2. Through the siphon principle, the coolant in the storage tank 3 enters the mechanical seal through the cooling pipe 17 for cooling. The heated coolant flows upward and from the outlet into the return pipe 18, then flows back into the storage tank 3 to be cooled by the cooling water coil 4, thus forming a cooling water circulation. This cooling water circulation utilizes the siphon principle, which is existing technology. The color sensor 5 is clamped onto the return pipe 18 and connected to the return pipe 18. The pipe walls are in contact, and the color sensor 5 is electrically connected to the alarm mechanism in the DCS central control room. If the mechanical seal of the fluoropolymer-lined centrifugal pump 2 experiences wear and leakage, the conveying medium will leak into the cooling chamber of the mechanical seal. At this time, the acidic or alkaline tail gas treatment solution will react with the color developing reagent in the coolant, causing the color developing reagent to change color, and thus changing the color of the coolant. When the color-changed coolant passes through the speed sensor via the return pipe 18, the color sensor 5 recognizes the color change and sends a signal to the DCS central control room to generate an alarm, thus issuing a warning in the early and middle stages of mechanical seal leakage.

[0024] Specifically, both cooling pipe 17 and return pipe 18 are transparent PU pipes. The transparent PU pipes allow for easy observation of the color of the coolant inside the pipes, enabling the color sensor 5 to send a signal in a timely manner. The coolant is ethylene glycol coolant, and the color developing reagent is either phenolphthalein or methyl orange. When the medium transported by the fluoropolymer-lined centrifugal pump 2 is alkaline, the storage tank 3 stores slightly acidic ethylene glycol coolant containing phenolphthalein color developing reagent. In this case, the color developing reagent does not change color. When the ethylene glycol coolant containing the color developing reagent comes into contact with the leaking alkaline medium, the color developing reagent undergoes a color change reaction, which can be identified by the color sensor 5. Similarly, when the medium transported by the fluoropolymer-lined centrifugal pump 2 is acidic, a neutral or slightly alkaline ethylene glycol coolant is selected, which contains methyl orange color developing reagent. When the coolant comes into contact with the leaking acidic medium, the methyl orange will change color, which can be identified by the color sensor 5. This allows for the detection of leaks in the early and middle stages of mechanical seal leakage.

[0025] Specifically, both the cooling pipe 17 and the return pipe 18 are equipped with insertion tubes 15 near the liquid storage tank 3. Two fixed pipes 6 are fixedly connected to the outer circumference of the liquid storage tank 3. Each fixed pipe 6 is fixedly connected to a connecting pipe 7 adapted to the insertion tube 15. Each insertion tube 15 has a limiting groove 151 on its outer circumference. Each connecting pipe 7 has multiple moving grooves 9 at its end away from the liquid storage tank 3. Each moving groove 9 has a sliding abutment ball 10. Both ends of each abutment ball 10 are spherical. The abutment ball 10 can only slide radially along the connecting pipe 7 within its corresponding moving groove 9. The abutment ball 10 is adapted to the limiting groove 151 on the insertion tube 15. The limiting groove 151 can only accommodate the spherical end of the abutment ball 10. The fixing tube 6 supports the connecting tube 7. When it is necessary to connect the cooling tube 17 and the return tube 18 to the liquid storage tank 3, the insertion tube 15 on the cooling tube 17 is inserted into the connecting tube 7 below the liquid storage tank 3, and the insertion tube 15 on the return tube 18 is inserted into the connecting tube 7 on the upper side of the liquid storage tank 3. When the insertion tube 15 moves towards the connecting tube 7, the insertion tube 15 abuts against the spherical head of each abutting ball 10, pushing each abutting ball 10 away from the insertion rod. When the insertion tube 15 is fully inserted into the connecting tube 7, the corresponding limiting groove 151 is also aligned with each abutting ball 10. At this time, the spherical head of each abutting ball 10 is brought close to the limiting groove 151, thereby fixing the insertion tube 15 and the connecting tube 7 together.

[0026] Specifically, a movable cylinder 11 is slidably disposed on the outer circumferential surface of the connecting pipe 7. The movable cylinder 11 includes an abutment portion 12, and springs 14 are fixedly disposed between the abutment portion 12 and the fixed pipe 6. The abutment portion 12 of the movable cylinder 11 is slidably connected to the connecting pipe 7. In the initial state, the springs 14 cause the abutment portion 12 of the movable cylinder 11 to be positioned outside each abutment ball 10, and the abutment portion 12 pushes each abutment ball 10 to its end, which protrudes from the inner ring of the connecting pipe 7. When it is necessary to insert the insertion tube 15 into the connecting pipe 7, it moves towards the liquid storage tank 3. The moving cylinder 11 is pushed in a certain direction, and the moving cylinder 11 causes the abutment part 12 to move away from the outside of the abutment ball 10. At this time, the insertion tube 15 is inserted into the connecting tube 7, and the abutment ball 10 can move. When the insertion tube 15 is fully inserted into the connecting tube 7, the moving cylinder 11 is released, and the moving cylinder 11 is reset by the spring 14. At this time, the moving cylinder 11 squeezes each abutment ball 10 and pushes one end of the moving cylinder 11 into the limiting groove 151. The connecting tube 7 and the insertion tube 15 are fixedly connected together by the cooperation of the abutment ball 10 and the limiting groove 151.

[0027] Specifically, a sealing gasket 8 is fixedly installed inside the connecting tube 7. The sealing gasket 8 is located on the inner wall of the connecting tube 7, between the abutment ball 10 and the fixed tube 6. When the insertion tube 15 is inserted into the connecting tube 7, the sealing performance between the connecting tube 7 and the insertion tube 15 is increased by the interference fit between the sealing gasket 8 and the insertion tube 15.

[0028] Specifically, each insertion tube 15 is rotatably equipped with an abutment frame 16, and each movable cylinder 11 has a slot 13 at the end away from the liquid storage tank 3 that mates with the abutment frame 16. Multiple abutment plates are fixed on the abutment frame 16, and the slot 13 is adapted to the abutment plates on the abutment frame 16. When the insertion tube 15 is installed in the connecting tube 7, the movable abutment frame is moved so that one end of the insertion tube 15 is first aligned with the inner ring of the connecting tube 7 and inserted into the connecting tube 7 at a certain point. Then, the abutment frame 16 is continued to move. At this time, the abutment frame 16 and the end of the movable cylinder 11 away from the liquid storage tank 3 are aligned. As the abutting frame 16 moves, the abutting part 12 of the moving cylinder 11 separates from the abutting ball 10. At this time, the insertion tube 15 moves to the position of the abutting ball 10, thereby pushing the abutting ball 10 outward. When the insertion tube 15 is fully inserted into the connecting tube 7, the abutting frame 16 is rotated. When the slot 13 on the moving cylinder 11 is aligned with the abutting plate, the spring 14 returns to its original position, thereby connecting the insertion tube 15 and the connecting tube 7 together. The return pipe 18, the cooling pipe 17 and the liquid storage tank 3 can be quickly installed by simply pushing the abutting frame 16, and disassembly is also convenient.

[0029] Specifically, a column 19 is fixedly installed on the base 1, and a screw 20 is internally threaded onto the column 19. A rotating plate 21 is rotatably mounted on the top of the screw 20, and a limit ring 22 is fixedly installed at the end of the rotating plate 21 away from the screw 20. When connecting the liquid storage tank 3 to the outlet of the mechanical seal through the return pipe 18, one end of the return pipe 18 passes through the limit ring 22 and is then connected to the corresponding connecting pipe 7. A fastening bolt 23 is threaded onto the top of the screw 20, and the nut of the fastening bolt 23 abuts against the rotating plate 21. By tightening the fastening bolt 23, the rotating plate 21 can be fixed. After the return pipe 18 is connected to the liquid storage tank 3, the height of the rotating plate 21 and the limit ring 22 can be controlled by rotating the screw 20. Plate 21 can adjust the direction of the limiting ring 22, thereby adjusting the position of the limiting ring 22 and the return pipe 18 within the limiting ring 22, so that the return pipe 18 within the limiting ring 22 is the apex of the return pipe 18, thus facilitating the circulation and cooling of the coolant in the storage tank 3 using the siphon principle. Acidic or alkaline liquids leak into the coolant through the mechanical seal, causing a color change reaction, which can be detected by the color sensor 5. When the coolant return pipe 18 or the cooling pipe 17 leaks externally, resulting in no liquid return, the color also changes, which can also be detected by the color sensor 5. When circulating water in the cooling water coil 4 leaks into the coolant storage tank, causing the coolant to be diluted, the color also changes, which can also be detected by the color sensor 5.

[0030] 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 continuous and stable conveying device for acidic and alkaline fluids in exhaust gas treatment, comprising a base (1) and a fluoropolymer-lined centrifugal pump (2) disposed thereon, characterized in that, A liquid storage tank (3) is fixedly installed on the base (1). A cooling water coil (4) is fixedly installed inside the liquid storage tank (3). The liquid storage tank (3) contains liquid, including coolant and colorimetric reagent. The colorimetric reagent will change color when it comes into contact with acid or alkali solution. A cooling pipe (17) and a reflux pipe (18) are fixedly installed on the liquid storage tank (3). A colorimetric sensor (5) is fixedly installed on the reflux pipe (18).

2. The continuous and stable conveying device for acidic and alkaline fluids for tail gas treatment according to claim 1, characterized in that, Both the cooling pipe (17) and the return pipe (18) are transparent PU pipes.

3. The continuous and stable conveying device for acidic and alkaline fluids for exhaust gas treatment according to claim 2, characterized in that, The cooling pipe (17) and the return pipe (18) are both provided with insertion tubes (15) at the ends near the liquid storage tank (3). The outer circumferential surface of the liquid storage tank (3) is fixedly connected to two fixed pipes (6). Each fixed pipe (6) is fixedly connected to a connecting pipe (7) that is adapted to the insertion tube (15). Each insertion tube (15) has a limiting groove (151) on its outer circumferential surface. Each connecting pipe (7) has multiple moving grooves (9) at the end away from the liquid storage tank (3). Each moving groove (9) has a sliding abutment ball (10).

4. The continuous and stable conveying device for acidic and alkaline fluids for tail gas treatment according to claim 3, characterized in that, The connecting tube (7) has a movable cylinder (11) slidably disposed on its outer peripheral surface. The movable cylinder (11) includes an abutting part (12). A spring (14) is fixedly disposed between the abutting part (12) and the fixed tube (6).

5. The continuous and stable conveying device for acidic and alkaline fluids for exhaust gas treatment according to claim 4, characterized in that, Each of the connecting pipes (7) is fixedly provided with a sealing gasket (8).

6. The continuous and stable conveying device for acidic and alkaline fluids for exhaust gas treatment according to claim 5, characterized in that, Each of the inserted tubes (15) is rotatably provided with a contact frame (16), and each of the movable tubes (11) is provided with a slot (13) that mates with the contact frame (16) at the end away from the liquid storage tank (3).

7. The continuous and stable conveying device for acidic and alkaline fluids for tail gas treatment according to claim 6, characterized in that, A column (19) is fixedly installed on the base (1). A screw (20) is internally threaded onto the column (19). A rotating plate (21) is rotatably installed on the top of the screw (20). A limit ring (22) is fixedly installed at the end of the rotating plate (21) away from the screw (20).

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